Abstract
A Geodynamic Study of Peninsular India An attempt was made to elucidate the geodynamic conditions existing at the present time in Peninsular India. Morphological, structural and seismic information was collected for this purpose, as well as data from in-situ stress measurements by the hydraulic fracturing method. Inasmuch as the seismic activity was mainly concentrated around Koyna, the latter region was especially scrutinized. It has been found that the morphological (valley trends), structural (joint orientations) and seismic (fault plane solutions of earthquakes) evidence are all consistent with a neotectonic stress field whose maximum compression acts horizontally NW-SE, and whose minimum compression acts horizontally NE-SW. This trend is also confirmed by data from in-situ stress measurements in the Kolar Gold Fields. The lineaments gleaned from landsat imageries do not fit this pattern, indicating that they may not be related to the neotectonic conditions existing in India at all.
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