Physics
Scientific paper
Feb 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974pepi....8...63v&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 8, Issue 1, p. 63-74.
Physics
7
Scientific paper
The paleomagnetism of 22 flows which range in composition from olivine basalts to rhyolite and in elevation from 450 ft. to 2680 ft., from Mount Pavagarh, situated in Gujrat, India, has been studied. The igneous activity represented by these flows belongs to the Deccan Trap Plateau Basalt Series. Sixteen flows ranging in elevation from 900 to 2680 ft. showed normal magnetization with upward inclination, consistent with the position of India in the southern hemisphere during the period of their eruption. Four flows from elevation 450 ft. to 730 ft. showed intermediate as well as discordant directions. The paleomagnetic results obtained from these flows have been correlated with those of Deccan traps from other areas. The amount of paleosecular variation represented by these flows has been estimated and compared with that from similar vertical sequences of traps studied from other areas. It has been found that the magnitude of paleosecular variation varied during the period of Deccan trap activity. An estimate of continental drift has been made from mean pole position of the several vertical sequences of traps. This indicates that a drift of the Indian landmass of the order of 24° took place during the entire period represented by the Deccan trap activity. The results of paleomagnetic studies of other sedimentary and igneous formations of Cretaceous age are reviewed in the light of recent results on Deccan traps.
Mital G. S.
Verma R. K.
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