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Magnetotelluric 3D image of west coast (Aravali-Tural-Rajwadi) geothermal system, India

Authors

Raju,  Khasi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Vasu,  Deshmukh
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Pachigolla,  Venkata Vijaya Kumar
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Prabhala Bhaskara Venkata,  Subba Rao
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ajay Kishore,  Singh
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Raju, K., Vasu, D., Pachigolla, V. V. K., Prabhala Bhaskara Venkata, S. R., Ajay Kishore, S. (2023): Magnetotelluric 3D image of west coast (Aravali-Tural-Rajwadi) geothermal system, India, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3782


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020763
Abstract
The west coast geothermal system is one of the prominent geothermal zones in the Indian subcontinent. Audio and broadband range magnetotelluric (AMT & MT) data were collected in grid patterns in the Aravali, Tural, and Rajwadi geothermal zone on the West coast of India. Since, the interaction of hot fluids with rock formations causes three-dimensional crustal structures, imaging of such complex geothermal zones using 3D modeling gives a better picture of geothermal reservoir characteristics. Therefore, for the first time in the west coast geothermal region, we carried out a 3D inversion of AMT/MT data. The 3D inversion results bring out a high conductivity anomaly at a shallow depth that correlates well with the hot water spring. A vertical conductivity anomaly is associated with the faults/fracture zones in the area that control the hot springs and act as pathways for hot water to pump upwards. The shallow level of high resistivity features are linked with basement rocks acting as a heat source and meteoric water getting heated up due to the high thermal gradients of hard rocks.