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@STRING{anreps = {Ann.~Rev.~Earth~Planet.~Sci.}}

@STRING{EOS = {Eos Trans. AGU}}

@STRING{EPSL = {Earth Planet. Sci. Lett.}}

@STRING{gji = {Geophys.~J.~Int.}}

@STRING{gjras = {Geophys.~J.~R.~astr.~Soc.}}

@STRING{gph = {Geophysics}}

@STRING{gpr = {Geophys.~Prospect.}}

@STRING{grl = {Geophys. Res. Lett.}}

@STRING{jgg = {J. Geomagn. Geoelectr.}}

@STRING{jgr = {J. Geophys. Res.}}

@STRING{jsiam = {J. Soc. Indust. Appl. Math.}}

@STRING{jvgr = {J.~Volc.~Geother.~Res.}}

@STRING{mnras = {Monthly Notices of the Rotal Astronomical Society}}

@STRING{pageoph = {Pure Appl. Geophys.}}

@STRING{pepi = {Phys. Earth Planet. Inter.}}

@STRING{prsl = {Proc. Roy. Soc. Lon.}}

@STRING{rgsp = {Rev. Geophys. Space Phys.}}

@STRING{siamjsc = {SIAM J. Sci. Computing}}

@STRING{tectono = {Tectonophysics}}

@ARTICLE{degr90,
  author = {C. {de Groot-Hedlin} and S. Constable},
  title = {Occam's inversion to generate smooth, two-dimensional models for
	magnetotelluric data},
  journal = gph,
  year = {1990},
  volume = {55},
  pages = {1613--1624},
  citekey = {degr90}
}


@ARTICLE{Tikhonov65,
  author = {A. N. Tikhonov},
  title = {On the mathematical basis of electromagnetic sounding theory},
  journal = {Comput. Math. Phys.},
  year = {1965},
  volume = {5},
  pages = {545--548}
}

@ARTICLE{Tikhonov50,
  author = {A. N. Tikhonov},
  title = {On the determination of electric characteristics of deep layers of
	the {E}arth's crust},
  journal = {Dokl. Akad. Nauk SSSR},
  year = {1950},
  volume = {73},
  pages = {295--297}
}

@BOOK{Tikhonov79,
  title = {Methods for {S}olving {I}ll-{P}osed {P}roblems},
  publisher = {Nauka, Moscow},
  year = {1979},
  author = {A. N. Tikhonov and V. Y. Arsenin}
}



@ARTICLE{Cagniard1953,
  author = {L. Cagniard},
  title = {Basic theory of the magneto-telluric method of geophysical prospecting},
  journal = {Geophysics},
  year = {1953},
  volume = {18},
  pages = {605-635},
  keywords = {electrical, telluric currents},
  publisher = {Soc. Expl. Geophys.}
}


@ARTICLE{alum00,
  author = {DL Alumbaugh and GA Newman},
  title = {Image appraisal for {2D} and {3D} electromagnetic inversion},
  journal = gph,
  year = {2000},
  volume = {65},
  pages = {1455--1467},
  citekey = {alum00},
  optmonth = {SEP--OCT},
  optnote = {MT, resolution covariance, {2D}, {3D}, inversion},
  optnumber = {5}
}

@ARTICLE{apre97,
  author = {C. Aprea and J.R. Booker and J.T. Smith},
  title = {The forward problem of electromagnetic induction: accurate finite-difference
	approximations for two-dimensional discrete boundaries with arbitrary
	geometry},
  journal = gji,
  year = {1997},
  volume = {129},
  pages = {29--40}
}

@ARTICLE{babel,
  author = {{BABEL WG}},
  title = {Deep Seismic Reflection/Refraction Interpretation of Crustal Structure
	Along {BABEL} Profiles {A} and {B} In the Southern {B}altic Sea},
  journal = gji,
  year = {1993},
  volume = {112},
  pages = {325--343},
  number = {3}
}

@ARTICLE{Babushka2004,
  author = {Vladislav Babuska and Jaroslava Plomerova},
  title = {The {Sorgenfrei-Tornquist Zone} as the mantle edge of {B}altica lithosphere:
	new evidence from three-dimensional seismic anisotropy},
  journal = {Terra Nova},
  year = {2004},
  volume = {16},
  pages = {243--249},
  number = {5},
  abstract = { Abstract Joint analysis of shear-wave splitting parameters and directional
	dependence of teleseismic P residuals based on data from the seismic
	experiment TOR across the Trans-European Suture Zone suggest that
	the Sorgenfrei-Tornquist Zone (STZ) in northern Denmark forms the
	south-western margin of Baltica in the upper mantle. Different lithosphere
	thickness and different orientation of seismic anisotropy in the
	mantle lithosphere identify three domains separated by the STZ between
	Denmark and southern Sweden and the Thor Suture between northern
	Germany and Denmark. We suggest that the anisotropy reflects frozen-in
	olivine fabrics, most probably created during early stages of the
	evolution of the European continent. The middle Danish block might
	represent a microplate caught in between Avalonia and Baltica before
	the Caledonian orogeny. Terra Nova, 16, 243-249, 2004 },
  doi = {10.1111/j.1365-3121.2004.00558.x},
  eprint = {http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.2004.00558.x},
  url = {http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3121.2004.00558.x}
}

@ARTICLE{Babuska2004,
  author = {V. Babuska and J. Plomerova},
  title = {The {S}orgenfrei-{T}ornquist {Z}one as the mantle edge of {B}altica
	lithosphere: {N}ew evidence from three-dimensional seismic anisotropy},
  journal = {Terra Nova},
  year = {2004},
  volume = {16},
  pages = {243--249},
  number = {5},
  month = {OCT},
  journalfull = {TERRA NOVA}
}

@ARTICLE{Babuska2004a,
  author = {Vladislav Babuska and Jaroslava Plomerova},
  title = {The {S}orgenfrei-{T}ornquist {Z}one as the mantle edge of {B}altica
	lithosphere: new evidence from three-dimensional seismic anisotropy},
  journal = {Terra Nova},
  year = {2004},
  volume = {16},
  pages = {243--249},
  number = {5},
  abstract = { Abstract Joint analysis of shear-wave splitting parameters and directional
	dependence of teleseismic P residuals based on data from the seismic
	experiment TOR across the Trans-European Suture Zone suggest that
	the Sorgenfrei-Tornquist Zone (STZ) in northern Denmark forms the
	south-western margin of Baltica in the upper mantle. Different lithosphere
	thickness and different orientation of seismic anisotropy in the
	mantle lithosphere identify three domains separated by the STZ between
	Denmark and southern Sweden and the Thor Suture between northern
	Germany and Denmark. We suggest that the anisotropy reflects frozen-in
	olivine fabrics, most probably created during early stages of the
	evolution of the European continent. The middle Danish block might
	represent a microplate caught in between Avalonia and Baltica before
	the Caledonian orogeny. Terra Nova, 16, 243-249, 2004 },
  doi = {10.1111/j.1365-3121.2004.00558.x},
  eprint = {http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.2004.00558.x},
  url = {http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3121.2004.00558.x}
}

@ARTICLE{back68,
  author = {G. Backus and F. Gilbert},
  title = {The resolving power of gross {Earth} data},
  journal = gjras,
  year = {1968},
  volume = {16},
  pages = {169--205},
  citekey = {back68},
  optnote = {inversio, resolution, averaging, kernel}
}

@ARTICLE{Bahr1991,
  author = {K. Bahr},
  title = {Geological noise in magnetotelluric data -- a classification of distortion
	types},
  journal = pepi,
  year = {1991},
  volume = {66},
  pages = {24--38},
  number = {1-2},
  month = {FEB},
  journalfull = {PHYSICS OF THE EARTH AND PLANETARY INTERIORS}
}

@ARTICLE{Bahr1988,
  author = {K. Bahr},
  title = {Interpretation of the magnetotelluric impedance tensor -- regional
	induction and local telluric distortion},
  journal = gph,
  year = {1988},
  volume = {62},
  pages = {119--127},
  number = {2},
  journalfull = {JOURNAL OF GEOPHYSICS-ZEITSCHRIFT FUR GEOPHYSIK}
}

@ARTICLE{bail70,
  author = {R.C. Bailey},
  title = {Inversion of the geomagnetic induction problem},
  journal = prsl,
  year = {1970},
  volume = {315},
  pages = {185--194},
  citekey = {bail70},
  optnote = {inversion, geomagnetic, induction, uniqueness}
}

@ARTICLE{Balling1995,
  author = {N. Balling},
  title = {Heat flow and thermal structure of the lithosphere across the {B}altic
	{S}hield and northern {T}ornquist {Z}one},
  journal = tectono,
  year = {1995},
  volume = {244},
  pages = {13--50},
  number = {1-3},
  month = {FEB},
  journalfull = {Tectonophysics}
}

@ARTICLE{Banka2002,
  author = {D. Banka and T. C. Pharaoh and J. P. Williamson},
  title = {Potential field imaging of {P}alaeozoic orogenic structure in northern
	and central {E}urope},
  journal = {Tectonophysics},
  year = {2002},
  volume = {360},
  pages = {23--45},
  number = {1-4},
  month = {Dec},
  abstract = {Sutures The Trans-European Suture Zone (TESZ) is the most fundamental
	lithospheric boundary in Europe, separating the ancient crust of
	the Fennoscandian Shield-East European Craton from the younger crust
	of central Europe, and extending deep into the mantle. Geophysical
	potential field images provide an overview of the entire Palaeozoic
	orogenic system of northern and central Europe for the first time.
	The TESZ is largely concealed by sedimentary basins of Permian-Cenozoic
	age; geological observations are largely restricted to local basement
	highs and deep boreholes, and the coverage of deep seismic surveys
	is widely spaced, despite experiments recently acquired within the
	EUROPROBE programme. By contrast, the potential field data offer
	a relatively detailed coverage of standardised observations throughout
	the TESZ. While some features of the images may be sourced in the
	near surface, particularly in the gravity image, much of their content
	reflects the structure of the underlying Palaeozoic basement. At
	the scale presented, the images highlight the most fundamental features
	of the crustal structure of the TESZ. These include the strong contrast
	between the highly magnetic crust of the East European Craton and
	the less magnetic Palaeozoic-accreted terranes of central Europe;
	the lateral continuity of terranes and their internal structure,
	particularly where arc-magmatic complexes are involved; and the location
	and geometry of the terrane boundaries (oceanic sutures and strike-slip
	zones) that separate them.},
  day = {20},
  keywords = {Magnetic},
  url = {http://www.sciencedirect.com/science/article/B6V72-4728659-1/2/8284333067c8edc85ebc5fab7dc4f8e4}
}

@ARTICLE{Becken2003,
  author = {M. Becken and L.B. Pedersen},
  title = {Transformation of {VLF} anomaly maps into apparent resistivity and
	phase},
  journal = gph,
  year = {2003},
  volume = {68},
  pages = {497--505},
  number = {2},
  month = {MAR},
  journalfull = {GEOPHYSICS}
}

@ARTICLE{Becken2008,
  author = {M. Becken and O. Ritter and H. Burkhardt},
  title = {Mode separation of magnetotelluric responses in three-dimensional
	environments},
  journal = {Geophysical Journal International},
  year = {2008},
  volume = {172},
  pages = {67--86(20)},
  abstract = {SUMMARY <P></P>Magnetotelluric (MT) responses in complex, 3-D terrains
	are in general characterized by (i) elliptical polarization states
	of horizontal electric and magnetic fields; (ii) the non-orthogonality
	of electric and magnetic fields and (iii) a coupling of the anomalous
	tangential-electric (TE) and tangential-magnetic (TM) modes, giving
	rise to a mode-mixed anomalous electric field at the surface. These
	3-D effects are propagated into the MT impedance tensor, which is
	derived from horizontal electric and magnetic fields, recorded at
	the earth's surface. The 2 \&\#215; 2 impedance tensor is in general
	fully occupied, and each of its elements is a mode-mixed quantity.
	To study 3-D effects of MT (impedance) data, the TE and TM mode contributions
	must be separated. This becomes possible with the inclusion of the
	single-mode vertical magnetic transfer function (the ratio of vertical
	to horizontal magnetic fields). Then, the individual modes can be
	resolved without prior knowledge of the underlying 3-D conductivity
	structure. For this purpose, we consider (i) the spatial relations
	between electromagnetic field components recorded in an array of
	sites (Faraday's law) and (ii) that the magnetic TE mode and electric
	TM mode fields are potential fields within the insulating air half-space
	above the earth's surface. Based on these two dependencies, it is
	possible to reconstruct the entire electromagnetic field from (measured)
	mixed-mode impedances and vertical magnetic transfer functions and
	to separate it into TE and TM modes, and into normal and anomalous
	parts. Hereby, we cannot only study the contribution of the two modes
	on the observed impedance tensor but also quantify the influence
	of 3-D effects at each location and frequency of a particular data
	set. Results of a modelling study suggest, that (i) none of the elements
	of a 3-D impedances tensor can be regarded as favourable for a 2-D
	interpretation (only 3-D models can explain 3-D data), (ii) a heterogeneous
	crust can strongly obscure identification of responses originating
	from the lower crust or upper mantle even at very long periods and
	(iii) the TE mode magnetic transfer functions are most important
	for sensing deep anomalies.},
  doi = {doi:10.1111/j.1365-246X.2007.03612.x},
  url = {http://www.ingentaconnect.com/content/bsc/gji/2008/00000172/00000001/art00007}
}

@INCOLLECTION{berd1976,
  author = {M.N. Berdichevsky and V.I. Dmitriev},
  title = {Basic principles of interpretation of magnetotelluric sounding curves},
  booktitle = {Geolelectric and Geothermal Studies, KAPG Geophysical Monograph},
  publisher = {Akademiai Kaido},
  year = {1976},
  editor = {A. Adam},
  pages = {165--221},
  address = {Budapest, Hungary},
  optpages = {165?221}
}

@ARTICLE{Berd1997,
  author = {M.N. Berdichevsky and D.O. Pokhotelov},
  title = {Violation of the dispersion relations in a three-dimensional magnetotelluric
	model},
  journal = {Izvestya, Phys. Solid Earth},
  year = {1997},
  volume = {33},
  pages = {603--608}
}

@ARTICLE{Blundell1999,
  author = {D. J. Blundell},
  title = {The legacy of the {E}uropean {G}eotraverse},
  journal = {Tectonophysics},
  year = {1999},
  volume = {314},
  pages = {7--16},
  number = {1-3},
  month = {Dec},
  day = {10},
  keywords = {continental tectonics},
  url = {http://www.sciencedirect.com/science/article/B6V72-404GX5R-2/2/0dfebd05f1d6ab46cda5182e9e14f2ce}
}

@ARTICLE{brew76,
  author = {C. R. Brewitt-Taylor and J. T. Weaver},
  title = {On the finite difference solution of two-dimensional induction problems},
  journal = gjras,
  year = {1976},
  volume = {47},
  pages = {375--396}
}

@ARTICLE{chri93,
  author = {J. Christensen-Dalsgaard and P.C. Hansen and M.J. Thompson},
  title = {Generalized ingular-value decomposition analysis of helioseismic
	inversions},
  journal = mnras,
  year = {1993},
  volume = {264},
  pages = {541--564},
  citekey = {chri93}
}

@ARTICLE{Constable2006,
  author = {S. Constable},
  title = {{SEO3}: A new model of olivine electrical conductivity},
  journal = gji,
  year = {2006},
  volume = {166},
  pages = {435--437},
  number = {1},
  month = {JUL},
  journalfull = {GEOPHYSICAL JOURNAL INTERNATIONAL}
}

@ARTICLE{cons87,
  author = {S. C. Constable and R. L. Parker and C. G. Constable},
  title = {Occam's inversion: {A} practical algorithm for generating smooth
	models from electromagnetic sounding data},
  journal = gph,
  year = {1987},
  volume = {52},
  pages = {289--300},
  citekey = {cons87},
  optnote = {DC, EM, interpretation, inversion, models, math}
}

@ARTICLE{Cotte2002,
  author = {N. Cotte and H. A. Pedersen},
  title = {Sharp contrast in lithospheric structure across the {S}orgenfrei-{T}ornquist
	{Z}one as inferred by {R}ayleigh wave analysis of {TOR1} project
	data},
  journal = tectono,
  year = {2002},
  volume = {360},
  pages = {75--88},
  number = {1-4},
  month = {DEC},
  journalfull = {TECTONOPHYSICS}
}

@ARTICLE{Efron1979,
  author = {Efron, B. },
  title = {Bootstrap Methods: Another Look at the Jackknife},
  journal = {The Annals of Statistics},
  year = {1979},
  volume = {7},
  pages = {1--26},
  number = {1},
  abstract = {We discuss the following problem: given a random sample X = (X1, X2,
	?, Xn) from an unknown probability distribution F, estimate the sampling
	distribution of some prespecified random variable R(X, F), on the
	basis of the observed data x. (Standard jackknife theory gives an
	approximate mean and variance in the case R(X, F) = ?(F?) - ?(F),
	? some parameter of interest.) A general method, called the "bootstrap,"
	is introduced, and shown to work satisfactorily on a variety of estimation
	problems. The jackknife is shown to be a linear approximation method
	for the bootstrap. The exposition proceeds by a series of examples:
	variance of the sample median, error rates in a linear discriminant
	analysis, ratio estimation, estimating regression parameters, etc.},
  citeulike-article-id = {2825416},
  doi = {http://dx.doi.org/10.2307/2958830},
  keywords = {bootstrap, delta-method, statistics},
  posted-at = {2008-06-17 19:02:16},
  priority = {3},
  publisher = {Institute of Mathematical Statistics},
  url = {http://dx.doi.org/10.2307/2958830}
}

@ARTICLE{eugeno,
  author = {{EUGENO-S WG}},
  title = {Crustal structure and tectonic evolution european of the transition
	between the {Baltic Shield and the north German Caledonides (the
	EUGENO-S project)}},
  journal = {Tectonophysics},
  year = {1988},
  volume = {150},
  pages = {253--348},
  number = {3},
  month = {Aug},
  day = {01},
  url = {http://www.sciencedirect.com/science/article/B6V72-48B0H7K-9V/2/3baf73fbe8110a9dd98f32c33f6a08d7 This paper gives the first detailed presentation of the results of the EUGENO-S project, one of the major items within the Joint Programme of the European Geotraverse. The goal of the EUGENO-S project was to provide a deeper insight into the complex tectonic evolution of the transition from the intact Precambrian crust of the Baltic Shield to the Caledonian crust of the North German Lowlands. This transition zone is subdivided by a number of tectonic lineaments of different ages, one of which is the Tomquist Zone. A wealth of new information crucial to this investigation was provided by a set of seismic wide-angle reflection and refraction profiles carried out by an international team in June-July 1984. In addition, all available geological and geophysical data--both old and new--were subjected to an integrated interpretation by a large group of scientists during an intensive, international three-week Earth Science Study Centre held on the island of M?n, Denmark, in November 1985. The seismic field experiments comprised 51 explosions fired at 20 shotpoints in southwestern Sweden, Denmark, northernmost F.R. Germany and Poland. Overlapping and reversed observations were made at 800 recording sites along 5 profiles with a total length of 2100 km. In addition, on the marine parts of the profiles, good signals from an airgun array (32 1 total volume) were successfully recorded by ocean bottom seismometers and landstations out to distances of 200 km. The results show that the crustal thickness varies by more than 20 km in the area, from 26-35 km in the transition zone to 35-47 km in the Baltic Shield. In the Shield, the crustal structure of the Sveconorwegian structural province is different from that of the older Svecofennian province. The crustal thickness decreases gradually from the marginal part of the Shield towards the Tornquist Zone. A weak antiroot is developed at the crust-mantle boundary beneath the Tornquist Zone in northwestern Jutland, while a rapid decrease in the crustal thickness takes place across it in Kattegat and Scania. The crustal structure of the Ringk?bing-Fyn High is of shield type with marked lateral inhomogeneities. A N-S trending graben, 30 km wide and filled with 4 km of Palaeozoic sediments, was discovered beneath the 2 km thick Meso-Cenozoic cover of the High. The Precambrian crust extends at depth for about 50 km to the south of the subcrop of the Caledonian Deformation Front before it abruptly gives way to a ca. 20 km thick crystalline crust. This thin crystalline crust of the North German Lowland is nonconformably overlain by about 10 km of post-Caledonian sediments. The differential thinning of the Precambrian crystalline crust of the transition zone is ascribed to the cumulative effect of the predominantly transtensional/tensional regimes that influenced various parts of the transition zone during sequential late-Late Proterozoic and Phanerozoic tectonic events. It is suggested that the contrasting crustal structure of the Danish-Scanian and Polish parts of the Tornquist Zone was caused by the prevalence of transtensional/tensional regimes in the former, and transpressional/compressional regimes in the latter part of the Zone. This difference probably relates to the circumstance that the Polish part of the Tornquist Zone has been repeatedly active since the late-Late Proterozoic, whereas in the EUGENO-S area, only the Late Carboniferous-Permian and/or the Mesozoic-Early Cenozoic activity was concentrated within the Tornquist Zone, older movements having been absorbed preferentially in other parts of the wide transition zone.}
}

@ARTICLE{frie03,
  author = {S. Friedel},
  title = {Resolution, stability and efficiency of resistivity tomography estimated
	from a generalized inverse approach},
  journal = gji,
  year = {2003},
  volume = {153},
  pages = {305--316},
  citekey = {frie03},
  optnote = {ERT, resolution}
}

@ARTICLE{Fukao2001,
  author = {Y. Fukao and S. Widiyantoro and M. Obayashi},
  title = {Stagnant slabs in the upper and lower mantle transition region},
  journal = revgph,
  year = {2001},
  volume = {39},
  pages = {291--323},
  number = {3},
  month = {AUG},
  journalfull = {REVIEWS OF GEOPHYSICS}
}

@BOOK{golu96,
  title = {Matrix {C}omputations},
  publisher = {Johns Hopkins University Press},
  year = {1996},
  author = {G.H. Golub and C.F. {van Loan}},
  series = {Johns Hopkins Studies in the Mathematical Sciences},
  edition = {3rd},
  citekey = {golu96},
  optmonth = {November},
  optnote = {numerical linear algebra, matrix}
}

@ARTICLE{Gregersen2002,
  author = {S. Gregersen and P. Voss},
  title = {Summary of project {TOR}: delineation of a stepwise, sharp, deep
	lithosphere transition across {G}ermany-{D}enmark-{S}weden},
  journal = {Tectonophysics},
  year = {2002},
  volume = {360},
  pages = {61--73},
  number = {1-4},
  month = {Dec},
  day = {20},
  keywords = {Lithosphere transition},
  url = {http://www.sciencedirect.com/science/article/B6V72-46TBBTK-1/2/25ccfaff6b2474afeb9855475254df67}
}

@ARTICLE{GroomBailey1989,
  author = {R. W. Groom and R. C. Bailey},
  title = {Decomposition of magnetotelluric impedance tensors in the presence
	of local three-dimensional galvanic distortion},
  journal = jgr,
  year = {1989},
  volume = {94},
  pages = {1913--1925},
  number = {B2},
  abstract = {There are many occasions on which the magnetotelluric impedance tensor
	is affected by local galvanic distortion (channeling) of electric
	currents arising from induction in a conductive structure which is
	approximately two-dimensional (2-D) on a regional scale. Even though
	the inductive behavior is 2-D, the resulting impedance tensor can
	be shown to have three-dimensional (3-D) behavior. Conventional procedures
	for rotating the impedance tensor such as minimizing the mean square
	modulus of the diagonal elements do not in general recover the principal
	axes of induction and thus do not recover the correct principal impedances
	but rather linear combinations of them. This paper presents a decomposition
	of the impedance tensor which separates the effects of 3-D channeling
	from those of 2-D induction. Where the impedance tensor is actually
	the result of regional 1-D or 2-D induction coupled with local frequency
	independent telluric distortion, the method correctly recovers the
	principal axes of induction and, except for a static shift (multiplication
	by a frequency independent real constant), the two principal impedances.
	Also obtained are two parameters (twist and shear), which partially
	describe the effects of telluric distortion. It is shown that the
	tensor operator which describes the telluric distortions can always
	be factored into the product of three tensor sub-operators (twist,
	shear, local anisotropy) and a scalar. This product factorization
	allows assimilation of local anisotropy, if present, into the regional
	anisotropy. The method of decomposition is given in the paper along
	with a discussion of the improvements obtained over the conventional
	method and an example with real data.}
}

@ARTICLE{Brasse2006,
  author = {Brasse H. and Cerv V. and Ernst T. and Jozwiak W. and Pedersen L.
	B. and Varentsov Iv. M. and EMTESZ-Pomeranian Working Group},
  title = {Probing the electrical conductivity structure of the {T}rans-{E}uropean
	{S}uture {Z}one},
  journal = {Eos Trans. AGU},
  year = {2006},
  volume = {87},
  pages = {281--287},
  number = {29},
  month = {July},
  journalfull = {Eos Trans. AGU}
}

@ARTICLE{Haak1991a,
  author = {V. Haak and M. Eisel and G. Nover and G. Zulauf and J. Stoll and
	A. Kontny and E. Huenges and U. Harms and J. Kueck},
  title = {{KTB} and the electrical conductivity of the crust},
  journal = jgr,
  year = {1991a},
  volume = {102},
  pages = {289--306},
  number = {B8},
  month = {JUL},
  journalfull = {Journal Geophysical Research}
}

@ARTICLE{Haak1991b,
  author = {V. Haak and J. Stoll and H. Winter},
  title = {Why is the electrical resistivity around the {KTB} hole so low?},
  journal = pepi,
  year = {1991b},
  volume = {66},
  pages = {12--23},
  number = {1-2}
}

@ARTICLE{hans90,
  author = {P.C. Hansen},
  title = {Truncated singular value decomposition solutions to discrete ill-posed
	problems with ill-determined numerical rank},
  journal = siamjsc,
  year = {1990},
  volume = {11},
  pages = {503--518},
  citekey = {hans90},
  optnote = {TSVD inversion}
}

@ARTICLE{hans92,
  author = {P.C. Hansen and T. Sekii and H. Shibahashi},
  title = {The modified truncated {SVD} method for regularization in general
	form},
  journal = siamjsc,
  year = {1992},
  volume = {13},
  pages = {1142--1150},
  citekey = {hans92},
  optmonth = {general TSVD}
}

@BOOK{heat02,
  title = {{Scientific Computing - An Introductory Survey}},
  publisher = {McGraw-Hill},
  year = {2002},
  author = {M.T. Heath},
  edition = {2nd},
  citekey = {heat02},
  optnote = {Scientific Computing}
}

@ARTICLE{Heinson1999,
  author = {Graham Heinson},
  title = {Electromagnetic Studies Of The Lithosphere And Asthenosphere},
  journal = {Surveys in Geophysics},
  year = {1999},
  volume = {20},
  pages = {229--255},
  number = {3},
  month = {May},
  journalfull = {Surveys in Geophysics},
  reprinturl = {http://www.springerlink.com/content/p61745203ju20747}
}

@ARTICLE{Hieronymus2007,
  author = {C. F. Hieronymus and Z. H. Shomali and L. B. Pedersen},
  title = {A dynamical model for generating sharp seismic velocity contrasts
	underneath continents: {A}pplication to the {S}orgenfrei-{T}ornquist
	{Z}one},
  journal = epsl,
  year = {2007},
  volume = {262},
  pages = {77--91},
  number = {1-2}
}

@ARTICLE{Hirth2000,
  author = {G. Hirth and R.L. Evans and Chave A. D.},
  title = {Comparison of continental and oceanic mantle electrical conductivity:
	{I}s the {A}rchean lithosphere dry?},
  journal = {Geochem. Geophys. Geosyst.},
  year = {2000},
  volume = {1},
  number = {2000GC000048},
  month = {DEC},
  journalfull = {TECTONOPHYSICS}
}

@INBOOK{Hjelt2006,
  chapter = {Electrical conductivity and seismic velocity structures of the lithosphere
	beneath the {F}ennoscandian {S}hield},
  title = {{E}uropean {L}ithosphere {D}ynamics},
  publisher = {The Geological Society of London},
  year = {2006},
  editor = {D.G. Gee and R.A. Stephenson},
  author = {S.E. Hjelt and T. Korja and E. Kozlovskaya and I. Lahti and J. Yliniemi
	and WG BEAR and WG SVEKALAPKO Seismic Tomography},
  address = {Geological Society, London, Memoirs, 32},
  optpages = {541-559}
}

@ARTICLE{jack76,
  author = {D.D. Jackson},
  title = {{Most Squares Inversion}},
  journal = jgr,
  year = {1976},
  volume = {81},
  pages = {1027--1030},
  key = {jack76},
  optnote = {inversion, non-linearity},
  optnumber = {5}
}

@ARTICLE{jack72,
  author = {D.D. Jackson},
  title = {{Interpretation of Inaccurate, Insufficient and Inconsistent Data}},
  journal = gjras,
  year = {1972},
  volume = {28},
  pages = {97--109},
  key = {jack72}
}

@ARTICLE{joha77,
  author = {H. K. Johansen},
  title = {{A Man/Computer Interpretation System for Resistivity Soundings over
	a Horizontally Stratified Earth}},
  journal = gpr,
  year = {1977},
  volume = {25},
  pages = {667--691},
  citekey = {joha77},
  optnote = {DC resistivity, non-linearity, SVD}
}

@ARTICLE{Jones2001,
  author = {Alan G. Jones and Ian J. Ferguson and Alan D. Chave and Rob L. Evans
	and Gary W. McNeice},
  title = {{Electric lithosphere of the {S}lave craton}},
  journal = {Geology},
  year = {2001},
  volume = {29},
  pages = {423--426},
  number = {5},
  abstract = {The Archean Slave craton in northwestern Canada is an ideal natural
	laboratory for investigating lithosphere formation and evolution,
	and has become an international focus of broad geoscientific investigation
	following the discovery of economic diamondiferous kimberlite pipes.
	Three deep-probing magnetotelluric surveys have recently been carried
	out on the craton using novel acquisition procedures. The magnetotelluric
	responses reveal an unexpected and remarkable anomaly in electrical
	conductivity, collocated with the kimberlite field that is modeled
	as a spatially confined upper mantle region of low resistivity (<30
	{Omega}{middle dot}m) at depths of 80-100+ km, and is interpreted
	to be due to dissolved hydrogen or carbon in graphite form. This
	geophysically anomalous upper mantle region is also spatially coincident
	with a geochemically defined ultradepleted harzburgitic layer. The
	tectonic processes that emplaced this structure are possibly related
	to the lithospheric subduction and trapping of overlying oceanic
	mantle at 2630-2620 Ma.},
  doi = {10.1130/0091-7613(2001)029<0423:ELOTSC>2.0.CO;2},
  eprint = {http://geology.geoscienceworld.org/cgi/reprint/29/5/423.pdf},
  url = {http://geology.geoscienceworld.org/cgi/content/abstract/29/5/423}
}

@ARTICLE{jupp75a,
  author = {D.L.B. Jupp and K. Vozoff},
  title = {{Simple Iterative Methods for the Inversion of Geophysical Data}},
  journal = gjras,
  year = {1975},
  volume = {42},
  pages = {957--976},
  citekey = {jupp75a}
}

@ARTICLE{kals06,
  author = {T. Kalscheuer and M. Commer and A. H{\"o}rdt and S.L. Helwig and
	B. Tezkan},
  title = {{Electromagnetic Evidence for an Ancient Avalanche Caldera Rim on
	the South Flank of Mount Merapi, Indonesia}},
  journal = jvgr,
  year = {2006},
  volume = {submitted},
  citekey = {kals06},
  optnote = {LOTEM, Merapi, {2D}-modeling, caldera}
}

@ARTICLE{KorjaBEAR2002,
  author = {T. Korja and M. Engels and A. A. Zhamaletdinov and A. A. Kovtun and
	N. A. Palshin and M. Y. Smirnov and A. D. Tokarev and V. E. Asming
	and L. L. Vanyan and I. L. Vardaniants},
  title = {Crustal conductivity in {F}ennoscandia -- a compilation of a database
	on crustal conductance in the {F}ennoscandian Shield},
  journal = {Earth Planets Space},
  year = {2002},
  volume = {54},
  pages = {535--558},
  number = {5},
  journalfull = {EARTH PLANETS AND SPACE}
}

@ARTICLE{Korja1996,
  author = {T. Korja and P. Tuisku and T. Pernu and J. Karhu},
  title = {Field, petrophysical and carbon isotope studies on the {L}apland
	{G}ranulite {B}elt: implications for deep continental crust},
  journal = {Terra Nova},
  year = {1996},
  volume = {8},
  pages = {48--58},
  number = {1},
  abstract = { ABSTRACT The Palaeoproterozoic Lapland Granulite Belt is a seismically
	reflective and electrically conductive sequence of deep crustal (6-9
	kbar) rocks in the northern Fennoscandian Shield. It is composed
	of garnet-sillimanite gneisses (khondalites) and pyroxene granulites
	(enderbites) which in certain thrust sheets form about 500 m thick
	interlayers. The structure was formed by the intrusion of intermediate
	to basic magmas into turbiditic sedimentary rocks under granulite
	facies metamorphism accompanied by shearing of the deep crust about
	1.93-1.90 Gyr ago (Gal. Granulites were upthrust 1.90-1.87 Ga and
	the belt was divided by crustal scale duplexing into four structural
	units whose layered structure was preserved. The thrust structures
	are recognized by the repetition of lithological ensembles and by
	discordant structural patterns well distinguishable in airborne magnetic
	and electromagnetic data. Thrusting gave rise to clockwise pressure-temperature
	evolution of the belt. However, some basic rocks possibly record
	an isobaric cooling path. The low bulk resistivity of the belt (200-1000
	Omegam) is caused by interconnected graphite and subordinate sulphides
	in shear zones. On the basis of carbon isotope ratios this graphite
	is derived mostly from sedimentary organic carbon. The seismic reflectivity
	of the belt may be caused by velocity and density differences between
	pyroxene granulites and khondalites, as well as by shear zones. },
  doi = {10.1111/j.1365-3121.1996.tb00724.x},
  eprint = {http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.1996.tb00724.x},
  url = {http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3121.1996.tb00724.x}
}

@ARTICLE{Ledo2005,
  author = {Juanjo Ledo and Alan G. Jones},
  title = {Upper mantle temperature determined from combining mineral composition,
	electrical conductivity laboratory studies and magnetotelluric field
	observations: Application to the intermontane belt, {N}orthern {C}anadian
	{C}ordillera},
  journal = epsl,
  year = {2005},
  volume = {236},
  pages = {228--268},
  number = {1-2},
  month = {July},
  abstract = {Using laboratory-derived temperature dependences of the electrical
	conductivity of mantle minerals coupled with appropriate mixing laws,
	we determine the bulk conductivity of mantle mineral assemblages
	for the ternary olivine-orthopyroxene-clinopyroxene (Ol-Opx-Cpx)
	system. We calculate physical property bounds (Hashin-Shtrikman bounds)
	as a function of the fraction of different phases present; these
	limits correspond to the extreme situations where the most conducting
	phase is either fully interconnected or fully disconnected. The relationships
	we present between temperature, mineral composition and bulk electrical
	conductivity allow constraining one of them given the other two.
	We apply this approach to an area of the North American Cordilleran
	Intermontane Belt in the Yukon Territory, northern Canada, where
	xenolith evidence indicates bimodal upper mantle mineral assemblages
	(harzburgite and lherzolite). This locality coincides spatially with
	an upper mantle region of low electrical conductivity determined
	by long period magnetotelluric data. Given the mantle mineral composition
	and the maximum and minimum bounds on the electrical conductivity,
	deduced by non-linear model appraisal, we determine the permitted
	extremal temperature bounds of the Intermontane belt mantle rocks
	directly below the Moho to a depth of some 80 km. We show that the
	mantle in this region is at a minimum temperature of 820 [degree
	sign]C and a maximum temperature of 1020 [degree sign]C; the latter
	is some 200 [degree sign]C colder than that suggested in a recent
	interpretation of an observed collocated low velocity zone from a
	teleseismic survey.},
  keywords = {magnetotellurics, electrical conductivity, rock physics, mantle properties,
	Northern Canadian Cordillera}
}

@ARTICLE{Ledo2002,
  author = {J. Ledo and P. Queralt and A. Marti and A. G. Jones},
  title = {Two-dimensional interpretation of three-dimensional magnetotelluric
	data: {A}n example of limitations and resolution},
  journal = gji,
  year = {2002},
  volume = {150},
  pages = {127--139},
  number = {1},
  month = {JUL},
  journalfull = {GEOPHYSICAL JOURNAL INTERNATIONAL}
}

@ARTICLE{line84,
  author = {L. R. Lines and S. Treitel},
  title = {Tutorial: {A} review of least-squares inversion and its application
	to geophysical problems},
  journal = gpr,
  year = {1984},
  volume = {32},
  pages = {159--186},
  citekey = {line84},
  optnote = {DC, inversion, math, numeric}
}

@ARTICLE{Losito2001,
  author = {G. Losito and P. A. Schnegg and C. Lambelet and C. Viti and A. Trova},
  title = {Microscopic scale conductivity as explanation of magnetotelluric
	results from the {A}lps of western {S}witzerland},
  journal = gji,
  year = {2001},
  volume = {147},
  pages = {602--609},
  number = {3},
  month = {DEC},
  journalfull = {GEOPHYSICAL JOURNAL INTERNATIONAL}
}

@ARTICLE{mack93a,
  author = {R. L. Mackie and T. R. Madden},
  title = {Three-dimensional magnetotelluric inversion using conjugate gradients},
  journal = gji,
  year = {1993},
  volume = {115},
  pages = {215--229},
  citekey = {mack93a},
  optnote = {MT. inversion, 3D, conjugate gradients}
}

@ARTICLE{marq63,
  author = {D. W. Marquardt},
  title = {An algorithm for least-squares estimation of nonlinear parameters},
  journal = jsiam,
  year = {1963},
  volume = {11},
  pages = {431--441},
  citekey = {marq63},
  optmonth = {JUN},
  optnote = {Marquardt inversion},
  optnumber = {2}
}

@ARTICLE{Matsukage2005,
  author = {K. N. Matsukage and Y. Nishihara and S. Karato},
  title = {Seismological signature of chemical differentiation of {E}arth's
	upper mantle},
  journal = jgr,
  year = {2005},
  volume = {110},
  number = {B12305},
  doi = {10.1029/2004JB003504}
}

@ARTICLE{meju92,
  author = {M. A. Meju and V. R. S. Hutton},
  title = {Iterative most-squares inversion: application to magnetotelluric
	data},
  journal = gji,
  year = {1992},
  volume = {108},
  pages = {758--766},
  citekey = {meju92},
  optnote = {most-squares inversion, magnetotellurics}
}

@BOOK{menk89,
  title = {Geophysical data analysis: discrete inverse theory},
  publisher = {Academic Press},
  year = {1989},
  author = {W. Menke},
  volume = {45},
  series = {International Geophysics Series},
  address = {London},
  citekey = {menk89},
  optnote = {geophysics, inversion, inverse theory}
}

@ARTICLE{Michelsen1993,
  author = {Olaf Michelsen and Lars Henrik Nielsen},
  title = {Structural development of the {Fennoscandian Border Zone, offshore
	Denmark}},
  journal = {Marine and Petroleum Geology},
  year = {1993},
  volume = {10},
  pages = {124--134},
  number = {2},
  month = {Apr},
  abstract = {Palaeozoic-Mesozoic stratigraphy The Hans-1, Saeby-1 and Terne-1 wells
	are located within the Danish part of the Fennoscandian Border Zone
	and provide significant new data pertaining to the evolution of this
	important tectonic belt. All three wells encountered Palaeozoic and
	Mesozoic rocks. The Cambrian to Lower Silurian deposits can be closely
	correlated to sections known from Bornholm and Scania, and tectonic
	activity within the Fennoscandian Border Zone cannot be verified
	during this time interval. The thick Upper Silurian shales were probably
	deposited in a rapidly subsiding foreland basin, marginal to the
	speculative Caledonian deformation front which lies south of the
	Ringkobing-Fyn High. A major hiatus comprises the Devonian and Early
	Carboniferous. Upper Carboniferous sediments were deposited before
	a phase of rifting. Upper Carboniferous intrusive and extrusive volcanic
	rocks suggest tectonic activities, heralding the rifting phase. Extensive
	block faulting occurred in the border zone during the Rotliegende
	and more than 650 m of reworked volcanic rocks were deposited in
	an alluvial fan environment. Syndepositional erosion created a major
	unconformity before the deposition of post-rift Zechstein sediments.
	During the Mesozoic the Fennoscandian Border Zone was divided into
	two zones: the Sorgenfrei-Tornquist Zone to the west and the Skagerrak-Kattegat
	Platform to the east. The Sorgenfrei-Tornquist Zone continued to
	experience tectonic activity in Triassic and Middle Jurassic times.
	The zone has experienced an uplift of 1700-2000 m during Late Cretaceous
	to Early Tertiary inversion tectonics and the Late Tertiary uplift
	of Fennoscandia.},
  keywords = {Fennoscandian Border Zone},
  url = {http://www.sciencedirect.com/science/article/B6V9Y-4876JDB-2R/2/7d2e30a4ebed29d5ed90f00896c8524b}
}

@ARTICLE{mink96,
  author = {S.E. Minkoff},
  title = {A computationally feasible approximate resolution matrix for seismic
	inverse problems},
  journal = gji,
  year = {1996},
  volume = {126},
  pages = {345--359},
  citekey = {mink96},
  optmonth = {AUG},
  optnote = {seismic tomography, inversion, resolution, variance},
  optnumber = {2}
}

@ARTICLE{newm00,
  author = {G. A. Newman and D. L. Alumbaugh},
  title = {Three-dimensional magnetotelluric inversion using non-linear conjugate
	gradients},
  journal = gji,
  year = {2000},
  volume = {140},
  pages = {410--424},
  citekey = {newm00},
  optnote = {EM, MT, inversion, 3D, non-linear conjugate gradients }
}

@ARTICLE{olde99,
  author = {D.W. Oldenburg and Y.G. Li},
  title = {Estimating depth of investigation in dc resistivity and {IP} surveys
	},
  journal = gph,
  year = {1999},
  volume = {64},
  pages = {403--416},
  citekey = {olde99},
  optmonth = {MAR-APR},
  optnote = {DC, IP, DOI, depth of investigation},
  optnumber = {2}
}

@ARTICLE{park77,
  author = {R.L. Parker},
  title = {Understanding inverse theory},
  journal = anreps,
  year = {1977},
  volume = {5},
  pages = {35--64},
  citekey = {park77},
  optnote = {inverse theory}
}

@ARTICLE{pede04,
  author = {L.B. Pedersen},
  title = {Determination of the regularization level of truncated singular-value
	decomposition inversion: {The} case of {1D} inversion of {MT} data},
  journal = gpr,
  year = {2004},
  volume = {52},
  pages = {261--270},
  citekey = {pede04},
  optmonth = {JUL},
  optnote = {tsvd, mt, 1d},
  optnumber = {4}
}

@ARTICLE{pede79,
  author = {L.B. Pedersen},
  title = {{Constrained Inversion of Potential Field Data}},
  journal = gpr,
  year = {1979},
  volume = {27},
  pages = {726--748},
  citekey = {pede79},
  optnote = {inversion, non-linearity}
}

@ARTICLE{pede77,
  author = {L.B. Pedersen},
  title = {{Interpretation of Potential Field Data - A Generalized Inverse Approach}},
  journal = gpr,
  year = {1977},
  volume = {25},
  pages = {199--230},
  citekey = {pede77},
  optnumber = {2}
}

@ARTICLE{pede05a,
  author = {L.B. Pedersen and M. Bastani and L. Dynesius},
  title = {Groundwater exploration using combined controlled-source and radiomagnetotelluric
	techniques},
  journal = gph,
  year = {2005},
  volume = {70},
  pages = {G8--G15},
  citekey = {pede05},
  optmonth = {JAN-FEB},
  optnote = {groundwater, controlled source, RMT},
  optnumber = {1}
}

@ARTICLE{pede05b,
  author = {L.B. Pedersen and M. Engels},
  title = {Routine {2D} inversion of magnetotelluric data using the determinant
	of the impedance tensor},
  journal = gph,
  year = {2005},
  volume = {70},
  pages = {G33--G41},
  citekey = {pede05_2},
  optmonth = {MAR-APR},
  optnote = {MT, inversion, determinant},
  optnumber = {2}
}

@ARTICLE{pede89,
  author = {L.B. Pedersen and T.M. Rasmussen},
  title = {Inversion of magnetotelluric data: a non-linear least squares approach},
  journal = gpr,
  year = {1989},
  volume = {37},
  pages = {669--695},
  citekey = {pede89},
  optnote = {magnetotelluric, inversion, non-linear}
}

@ARTICLE{Pedersen1989,
  author = {L.B. Pedersen and T.M. Rasmussen},
  title = {Inversion of magnetotelluric data -- {A} non-linear least-squares
	approach},
  journal = gpr,
  year = {1989},
  volume = {37},
  pages = {669--695},
  month = {JUL},
  journalfull = {Geophysical Prospecting}
}

@ARTICLE{Pedersen2005,
  author = {L. B. Pedersen and M. Engels},
  title = {Routine {2D} inversion of magnetotelluric data using the determinant
	of the impedance tensor},
  journal = gph,
  year = {2005},
  volume = {70},
  pages = {G33--G41},
  number = {2},
  month = {MAR},
  journalfull = {GEOPHYSICS}
}

@ARTICLE{Petiau2000,
  author = {G. Petiau},
  title = {Second generation of lead-lead chloride electrodes for geophysical
	applications},
  journal = pageoph,
  year = {2000},
  volume = {157},
  pages = {357--382},
  number = {3},
  month = {MAR},
  journalfull = {PURE AND APPLIED GEOPHYSICS}
}

@ARTICLE{Pharaoh1999,
  author = {T. C. Pharaoh},
  title = {Palaeozoic terranes and their lithospheric boundaries within the
	{Trans-European Suture Zone (TESZ)}: a review},
  journal = {Tectonophysics},
  year = {1999},
  volume = {314},
  pages = {17--41},
  number = {1-3},
  month = {Dec},
  day = {10},
  keywords = {lithospheric delamination},
  url = {http://www.sciencedirect.com/science/article/B6V72-404GX5R-3/2/1f9ff8a62d3cb671eb4682fa46fced06}
}

@ARTICLE{Plomerova2002,
  author = {J. Plomerova and V. Babuska and L. Vecsey and D. Kouba},
  title = {Seismic anisotropy of the lithosphere around the {Trans-European
	Suture Zone (TESZ)} based on teleseismic body-wave data of the {TOR}
	experiment},
  journal = {Tectonophysics},
  year = {2002},
  volume = {360},
  pages = {89--114},
  number = {1-4},
  month = {Dec},
  abstract = {Joint inversion of anisotropic characteristics A passive teleseismic
	experiment (TOR), traversing the northern part of the Trans-European
	Suture Zone (TESZ) in Germany, Denmark and Sweden, recorded data
	for tomography of the upper mantle with a lateral resolution of few
	tens of kilometers as well as for a detailed study of seismic anisotropy.
	A joint inversion of teleseismic P-residual spheres and shear-wave
	splitting parameters allows us to retrieve the 3D orientation of
	dipping anisotropic structures in different domains of the sub-crustal
	lithosphere. We distinguish three major domains of different large-scale
	fabric divided by first-order sutures cutting the whole lithosphere
	thickness. The Baltic Shield north of the Sorgenfrei-Tornquist Zone
	(STZ) is characterised by lithosphere thickness around 175 km and
	the anisotropy is modelled by olivine aggregate of hexagonal symmetry
	with the high-velocity (ac) foliation plane striking NW-SE and dipping
	to NE. Southward of the STZ, beneath the Norwegian-Danish Basin,
	the lithosphere thins abruptly to about 75 km. In this domain, between
	the STZ and the so-called Caledonian Deformation Front (CDF), the
	anisotropic structures strike NE-SW and the high-velocity (ac) foliation
	dips to NW. To the south of the CDF, beneath northern Germany, we
	observe a heterogeneous lithosphere with variable thickness and anisotropic
	structures with high velocity dipping predominantly to SW. Most of
	the anisotropy observed at TOR stations can be explained by a preferred
	olivine orientation frozen in the sub-crustal lithosphere. Beneath
	northern Germany, a part of the shear-wave splitting is probably
	caused by a present-day flow in the asthenosphere.},
  day = {20},
  keywords = {P-residual spheres},
  url = {http://www.sciencedirect.com/science/article/B6V72-4700P34-2/2/09606f3b342b37e3903a063dca8a7821}
}

@ARTICLE{park81,
  author = {R.L. {R. L. Parker} and K. Whaler},
  title = {Numerical methods for establishing solutions to the inverse problem
	of electromagnetic induction},
  journal = jgr,
  year = {1981},
  volume = {86},
  pages = {9574--9584},
  citekey = {park81},
  optnote = {inversion, EM}
}

@ARTICLE{rasm93,
  author = {T. M. Rasmussen},
  title = {{2-D}imensional occam model of {COPROD2} data - 1st-order description
	of resolution and variance},
  journal = jgg,
  year = {1993},
  volume = {45},
  pages = {1027--1037},
  citekey = {rasm93}
}

@ARTICLE{Revil1998,
  author = {A. Revil and L. M. Cathles and S. Losh and J. A. Nunn},
  title = {Electrical conductivity in shaly sands with geophysical applications},
  journal = jgr,
  year = {1998},
  volume = {103},
  pages = {23925--23936},
  number = {B10},
  month = {OCT},
  journalfull = {JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH}
}

@ARTICLE{Ritter1999,
  author = {O. Ritter and V. Haak and V. Rath and E. Stein and M. Stiller},
  title = {Very high electrical conductivity beneath the {M}unchberg {G}neiss
	area in {S}outhern {G}ermany: {I}mplications for horizontal transport
	along shear planes},
  journal = gji,
  year = {1999},
  volume = {139},
  pages = {161--170},
  number = {1}
}

@ARTICLE{Ritter2005,
  author = {O. Ritter and A. Hoffmann-Rothe and P. A. Bedrosian and U. Weckmann
	and V. Haak},
  title = {Electrical conductivity images of active and fossil fault zones},
  journal = {Geological Society, London, Special Publications},
  year = {2005},
  volume = {245},
  pages = {165--186},
  number = {1},
  abstract = {We compare recent magnetotelluric investigations of four large fault
	systems: (i) the actively deforming, ocean-continent interplate San
	Andreas Fault (SAF); (ii) the actively deforming, continent-continent
	interplate Dead Sea Transform (DST); (iii) the currently inactive,
	trench-linked intraplate West Fault (WF) in northern Chile; and (iv)
	the Waterberg Fault/Omaruru Lineament (WF/OL) in Namibia, a fossilized
	intraplate shear zone formed during early Proterozoic continental
	collision. These fault zones show both similarities and marked differences
	in their electrical subsurface structure. The central segment of
	the SAF is characterized by a zone of high conductivity extending
	to a depth of several kilometres and attributed to fluids within
	a highly fractured damage zone. The WF exhibits a less pronounced
	but similar fault-zone conductor (FZC) that can be explained by meteoric
	waters entering the fault zone. The DST appears different as it shows
	a distinct lack of a FZC and seems to act primarily as an impermeable
	barrier to cross-fault fluid transport. Differences in the electrical
	structure of these faults within the upper crust may be linked to
	the degree of deformation localization within the fault zone. At
	the DST, with no observable fault-zone conductor, strain may have
	been localized for a considerable time span along a narrow, metre-scale
	damage zone with a sustained strength difference between the shear
	plane and the surrounding host rock. In the case of the SAF, a positive
	correlation of conductance and fault activity is observed, with more
	active fault segments associated with wider, deeper and more conductive
	fault-zone anomalies. Fault-zone conductors, however, do not uniquely
	identify specific architectural or hydrological units of a fault.
	A more comprehensive whole-fault picture for the brittle crust can
	be developed in combination with seismicity and structural information.
	Giving a window into lower-crustal shear zones, the fossil WF/OL
	in Namibia is imaged as a subvertical, 14 km-deep, 10 km-wide zone
	of high and anisotropic conductivity. The present level of exhumation
	suggests that the WF/OL penetrated the entire crust as a relatively
	narrow shear zone. Contrary to the fluid-driven conductivity anomalies
	of active faults, the anomaly here is attributed to graphitic enrichment
	along former shear planes. Once created, graphite is stable over
	very long time spans and thus fault/shear zones may remain conductive
	long after activity ceases.},
  doi = {10.1144/GSL.SP.2005.245.01.08},
  eprint = {http://sp.lyellcollection.org/cgi/reprint/245/1/165.pdf},
  url = {http://sp.lyellcollection.org/cgi/content/abstract/245/1/165}
}

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  optnumber = {4}
}

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  title = {Sensitivity studies applied to a two-dimensional resistivity model
	from the Central {Andes}},
  journal = gji,
  year = {2002},
  volume = {150},
  pages = {673--686},
  citekey = {schw02},
  optnote = {MT sensitivities 2D},
  optnumber = {3}
}

@ARTICLE{Schwalenberg2002,
  author = {K. Schwalenberg and V. Rath and V. Haak},
  title = {Sensitivity studies applied to a two-dimensional resistivity model
	from the {C}entral {A}ndes},
  journal = gji,
  year = {2002},
  volume = {150},
  pages = {673--686},
  number = {3},
  month = {SEP},
  journalfull = {GEOPHYSICAL JOURNAL INTERNATIONAL}
}

@ARTICLE{Shomali2002,
  author = {Z. H. Shomali and R. G. Roberts},
  title = {Non-linear body wave teleseismic tomography along the {TOR} array},
  journal = gji,
  year = {2002},
  volume = {148},
  pages = {562--574},
  number = {3},
  month = {MAR},
  journalfull = {GEOPHYSICAL JOURNAL INTERNATIONAL}
}

@ARTICLE{Shomali2006,
  author = {Z. H. Shomali and R. G. Roberts and L. B. Pedersen},
  title = {Lithospheric structure of the {T}ornquist {Z}one resolved by nonlinear
	{P} and {S} teleseismic tomography along the {TOR} array},
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  pages = {133--149},
  number = {1-4},
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}

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  title = {An efficient data-subspace inversion method for {2-D} magnetotelluric
	data},
  journal = gph,
  year = {2000},
  volume = {65},
  pages = {791--803},
  citekey = {siri00},
  optmonth = {MAY-JUNE},
  optnote = {2D MT inversion},
  optnumber = {3}
}

@ARTICLE{Siripunvaraporn2000,
  author = {W. Siripunvaraporn and G. Egbert},
  title = {An efficient data-subspace inversion method for {2D} magnetotelluric
	data},
  journal = gph,
  year = {2000},
  volume = {65},
  pages = {791--803},
  number = {3},
  month = {MAY},
  journalfull = {GEOPHYSICS}
}

@ARTICLE{siri05,
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	three-dimensional inversion: synthetic examples},
  journal = gji,
  year = {2005},
  volume = {160},
  pages = {804--814},
  citekey = {siri05},
  optmonth = {MARCH},
  optnote = {3D MT inversion},
  optnumber = {3}
}

@ARTICLE{Smirnov2003,
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  title = {Magnetotelluric data processing with a robust statistical procedure
	having a high breakdown point},
  journal = gji,
  year = {2003},
  volume = {152},
  pages = {1--7},
  number = {1},
  month = {JAN},
  journalfull = {GEOPHYSICAL JOURNAL INTERNATIONAL}
}

@ARTICLE{Swift1967,
  author = {C. M. Swift},
  title = {A magnetotelluric investigation of electrical conductivity anomaly
	in the southwestern {U}nited {S}tates},
  journal = {PhD Thesis Massachusetts Institute of Technology},
  year = {1967},
  pages = {Cambridge, MA},
  month = {FEB},
  journalfull = {Tectonophysics}
}

@ARTICLE{Thomsen1989,
  author = {I.D. Thomsen},
  title = {Magnetotelluric investigations in selected Danish areas with special
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  year = {1989},
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  pages = {155--190},
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  journalfull = {TECTONOPHYSICS}
}

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  author = {A. Tryggvason and C. E. Lund and M. Friberg},
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	the {EUGENO-S} profile 1 revisited},
  journal = tectono,
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  pages = {47--58},
  number = {1-2},
  month = {MAY},
  journalfull = {TECTONOPHYSICS}
}

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  author = {O.V. Vejbaek and P. Britze},
  title = {Geological map of {D}enmark 1:750 000. {T}op pre-{Z}echstein},
  journal = {Ministry of Environment and Energy, Map Series},
  year = {1994},
  volume = {ISBN 87-89813-20-0},
  number = {45},
  month = {JUL},
  journalfull = {GEOPHYSICAL JOURNAL INTERNATIONAL}
}

@ARTICLE{vozo75,
  author = {K. Vozoff and D. L. B. Jupp},
  title = {{J}oint {I}nversion of {G}eophysical {D}ata},
  journal = gjras,
  year = {1975},
  volume = {42},
  pages = {977--991},
  citekey = {vozo75},
  optnote = {EM, joint-inversion, inversion}
}

@ARTICLE{Wang2006,
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  title = {The effect of water on the electrical conductivity of olivine},
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@ARTICLE{weid72,
  author = {P. Weidelt},
  title = {The {I}nverse {P}roblem of {G}eomagnetic {I}nduction},
  journal = zfg,
  year = {1972},
  volume = {38},
  pages = {257--289},
  citekey = {weid72},
  optnote = {EM, inversion}
}

@ARTICLE{Weidelt1994,
  author = {P. Weidelt and P. Kaikkonen},
  title = {Local {1D} interpretation of magnetotelluric {B}-polarization impedances},
  journal = {Geophysical Journal International},
  year = {1994},
  volume = {117},
  pages = {733--748},
  number = {3},
  doi = {10.1111/j.1365-246X.1994.tb02466.x},
  eprint = {http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-246X.1994.tb02466.x},
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}

@ARTICLE{wigg72,
  author = {R.A. Wiggins},
  title = {{The General Linear Inverse Problem: Implication of Surface Waves
	and Free Oscillations for Earth Structure}},
  journal = rgsp,
  year = {1972},
  volume = {10},
  pages = {251--285},
  month = {February},
  citekey = {wigg72},
  optnote = {inverse problem, resolution, variance},
  optnumber = {1}
}

@ARTICLE{xu98,
  author = {P. Xu},
  title = {Truncated {SVD} methods for discrete linear ill-posed problems},
  journal = gji,
  year = {1998},
  volume = {135},
  ages = {505-514},
  citekey = {xu98},
  optmonth = {OCT},
  optnote = {singular value decomposition, truncation level, ill-posed problem}
}

@ARTICLE{yao99,
  author = {Z.S. Yao and R.G. Roberts and A. Tryggvason},
  title = {Calculating resolution and covariance matrices for seismic tomography
	with the {LSQR} method},
  journal = gji,
  year = {1999},
  volume = {138},
  pages = {886--894},
  citekey = {yao99},
  optmonth = {SEP},
  optnote = {resolution, covariance, seismic tomography, LSQR},
  optnumber = {3}
}

@ARTICLE{Zhang1987,
  author = {P. Zhang and R. G. Roberts and L. B. Pedersen},
  title = {Magnetotelluric strike rules},
  journal = gph,
  year = {1987},
  volume = {52},
  pages = {267--278},
  number = {3},
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  journalfull = {GEOPHYSICS}
}

