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Magnetotelluric evidence for a possible fault-guided fluid pathway beneath Tatapani hot springs in the Son-Narmada-Tapti lineament zone of Central India.

Patro PK, Borah U, Raju K, Rao SPE, Reddy KC, Dhamodharan S, Sarma SVS.

GEOTHERMICS

https://doi.org/10.1016/j.geothermics.2026.103761 

Integration of MT datasets with available geological, borehole, gravity, and tectonic information reveals a structurally controlled geothermal system associated with major fault zones and fractured basement structures. The 3D MT inversion delineates prominent conductive anomalies (<20 Ω.m) extending to depths of ~5-6 km beneath the Tatapani Fault zone. These conductive zones are interpreted as fluid-saturated and hydrothermally altered regions. The results inferred that the Tatapani geothermal system is primarily controlled by tectonic reactivation and convective hydrothermal circulation within the fractured Proterozoic basement.

Fig: An iso-surface plot of Tatapani geothermal reservoir derived from the three-dimensional inversion of MT data.

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