Volcanological and Petrological study of Deccan magmatism in parts of Kachchh, Saurashtra and Mumbai - by Dr. Pooja Kshirsagar
07 Oct 2013 | Contributor(s): Pooja Vinod Kshirsagar
The presentation is an outcome of my Ph.D research work conducted on the lava flows and mafic volcanoclastic deposits of Northwestern Deccan Traps of India, at the Department of Earth Sciences, Indian Institute of Technology Bombay, India (2009-2013). It emphasize the importance of physical...
Spherulites and thundereggs from pitchstones of the Deccan Traps: geology, petrochemistry, and emplacement environments
18 Sep 2013 | Contributor(s): Pooja Vinod Kshirsagar
Spherulites and thundereggs are rounded, typically spherical, polycrystalline objects found in glassy silicic rocks. Spherulites are dominantly made up of radiating microscopic fibers of alkali feldspar and a silica mineral (commonly quartz). They form due to heterogeneous nucleation in highly...
Mafic alkalic magmatism in central Kachchh, India- a monogenetic volcanic field in the northwestern Deccan Traps
18 Sep 2013 | Contributor(s): Pooja Vinod Kshirsagar, Badre Alam shaikh, Hetu Sheth
Magmatism in Kachchh, in the northwestern Deccan continental flood basalt province, is represented not only by typical tholeiitic flows and dikes, but also plug-like bodies, in Mesozoic sandstone, of alkali basalt, basanite, melanephelinite and nephelinite, containing mantle nodules. They form...