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

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Iron-Titanium Oxide Geothermometry for some Deccan Trap Tholeiitic Basalts, India


Affiliations
1 Department of Geology, St. Xavier's College, Bombay 400 001, India
2 Mineralogisch Institut, Albert-Ludwigs Universitat, D-7800 Freiburg i BR, Germany
     

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The oxygen fugacity and temperature of equilibration of the iron-titanium oxides for thirty samples of basaltic rocks, taken from different parts of the Tholeiitic Flood Basalt Province of Deccan Trap (Tertiary); are given. Temperatures range from 950° to 1200°C and oxygen fugacity from 9 to 12 (as -log10). Picritic basalts from Igatpuri along the Western Ghats, that form compound lava fiows, give lower temperatures of equilibration of the iron-titanium oxides (considered to represent the liquidus of the host rock) as compared to the simple thin lava flows of normal tholeiitic basalt from the eastern parts of the Deccan trap outcrop.
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  • Iron-Titanium Oxide Geothermometry for some Deccan Trap Tholeiitic Basalts, India

Abstract Views: 178  |  PDF Views: 2

Authors

S. F. Sethna
Department of Geology, St. Xavier's College, Bombay 400 001, India
W. Czygan
Mineralogisch Institut, Albert-Ludwigs Universitat, D-7800 Freiburg i BR, Germany
B. S. Sethna
Department of Geology, St. Xavier's College, Bombay 400 001, India

Abstract


The oxygen fugacity and temperature of equilibration of the iron-titanium oxides for thirty samples of basaltic rocks, taken from different parts of the Tholeiitic Flood Basalt Province of Deccan Trap (Tertiary); are given. Temperatures range from 950° to 1200°C and oxygen fugacity from 9 to 12 (as -log10). Picritic basalts from Igatpuri along the Western Ghats, that form compound lava fiows, give lower temperatures of equilibration of the iron-titanium oxides (considered to represent the liquidus of the host rock) as compared to the simple thin lava flows of normal tholeiitic basalt from the eastern parts of the Deccan trap outcrop.