Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Geochronology of Miliolite Rocks of Kutch, Western India


Affiliations
1 Physical Research Laboratory, Ahmedabad 380009, India
2 KDMIPE, Oil and Natural Gas Commission, Dehra Dun 248195, India
3 Post-Graduate and Research Institute, Deccan College, Pune 411 006, India
     

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Preliminary geochemical, mineralogical and geochronological studies using 230Th/234U method, of nine rniliolite rocks from Kutch are reported. The Kutch miliolites are characterised by lower CaCO3and higher quartz contents compared to their Saurashtra counterparts. The range of ages for the Kutch and Saurashtra miliolites are same and both can be accommodatedin the 50-70, 75-115 and > 140 K. Yr age groups proposed by Baskaran (1985).

The origin of the Kutch miliolites, like those of Saurashtra, appears to be marine. Theories to explain their occurrence in Kutch have to await more detailed studies of this type alongwith ichnological and petrographic observations.


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  • Geochronology of Miliolite Rocks of Kutch, Western India

Abstract Views: 190  |  PDF Views: 2

Authors

M. Baskaran
Physical Research Laboratory, Ahmedabad 380009, India
S. V. Deshpande
KDMIPE, Oil and Natural Gas Commission, Dehra Dun 248195, India
S. N. Rajaguru
Post-Graduate and Research Institute, Deccan College, Pune 411 006, India
B. L. K. Somayajulu
Physical Research Laboratory, Ahmedabad 380009, India

Abstract


Preliminary geochemical, mineralogical and geochronological studies using 230Th/234U method, of nine rniliolite rocks from Kutch are reported. The Kutch miliolites are characterised by lower CaCO3and higher quartz contents compared to their Saurashtra counterparts. The range of ages for the Kutch and Saurashtra miliolites are same and both can be accommodatedin the 50-70, 75-115 and > 140 K. Yr age groups proposed by Baskaran (1985).

The origin of the Kutch miliolites, like those of Saurashtra, appears to be marine. Theories to explain their occurrence in Kutch have to await more detailed studies of this type alongwith ichnological and petrographic observations.