Download Deep Crustal Structure of the Son-Narmada-Tapti Lineament, by G. Dhanunjaya Naidu PDF

By G. Dhanunjaya Naidu

With a size of approximately 1200 km, the Son-Narmada-Tapti Lineament (NSL) is without doubt one of the such a lot admired geomorphic gains within the Indian subcontinent. Anomalous conductive our bodies are delineated at mid-lower crustal depths under significant earthquake epicentral zones. The quarter has been interpreted because the collision quarter of the Indian Plate with the Eurasian Plate. The NSL area is for this reason additionally recognized to be the second one most vital tectonic function within the Indian geology, after the Himalayas.

The current thesis describes major new perception into the seismotectonics of this valuable India tectonic region, in response to thorough magnetotelluric stories. the most targets of the current examine are: (i) to delineate subtrappean sediments around the NSL sector alongside 4 diverse traverses, (ii) to appreciate the characterization of geo-electrical constitution of the crust and view the character of geo-electrical signatures of the recognized faults, (iii) to combine the implications with different geophysical information resembling seismicity, gravity and warmth move, so one can comprehend the tectonic state of affairs of the sector.

Deep electromagnetic (magnetotelluric) analyses have been built-in during this examine with gravity, seismic and warmth circulation stories and special, delineated deep crustal gains. The ensuing excessive conductivity is justified with the presence of fluids at mid-lower crustal depths. The migration of those fluids from mantle to mid-lower crustal depths via pre-existing brittle fracture/fault zones have been evidently because of the plume on the topic of the Deccan volcanism. Migration of the fluids generated the next fluid strain alongside the faults and led to earthquakes.

Based at the geo-electric sections derived alongside the 4 traverses of the Narmada-Son Lineament region, the current learn provides vital clues at the subduction/collision historical past during this very important tectonic zone.

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