Details of the Abstract
| Title of paper | New wideband magnetotelluric imaging of the Carpentaria Conductivity Anomaly |
| List of authors | Kerr, J.M., Brown, D.D., Aivazpourporgou, S. |
| Affiliation(s) | Geological Survey of Queensland, Geological Survey of Queensland, Geological Survey of Queensland |
| Summary |
A new wideband magnetotelluric survey has been collected as a collaboration between the Geological Survey of Queensland and Geoscience Australia. The survey was collected broadly to the south of the Cloncurry MT survey, with the aim to trace the location of the southern part of the Carpentaria Conductivity Anomaly (CCA). Data were collected at approximately 10 km site spacing, with approximately 20 km between survey lines. Data at over 250 new MT sites are now publicly available thought the Geological Survey of Queensland open data portal. Data analysis shows complex 3D character across much of the survey, necessitating 3D inversion of the dataset. Strike is complex with a tendency to meridional in the range of 100hz to 0.001hz and longitudinal below 0.01hz. Preliminary inversion using ModEM3D suggests that there is a major conductivity feature which runs north south through the survey area which is broadly coincident with the location of the eastern boundary of the Numil Seismic province at mid-crustal depths. This feature is consistent with the CCA and extends to the southern extent of the new survey bounds. Comparison to other available datasets suggests that the southern-most extent of the CCA has a lower conductivity, suggesting a change in nature along the strike of the feature. |
| Session Keyword | 4.0 Tectonics and geodynamics, including magmatism |
| File upload |
4.0_new_wideband_magnetotellu_kerr.pdf
|