Magma fractionation and mixing in nephelinite plug associated with deccan magmatism at Murud-Janjira, south of Bombay, India

dc.contributor.author	Dessai, A.G.
dc.date.accessioned	2015-06-03T06:40:16Z
dc.date.available	2015-06-03T06:40:16Z
dc.date.issued	1994
dc.identifier.citation	Journal of the Geological Society of India. 43(5); 1994; 493-509.	en_US
dc.identifier.uri	http://irgu.unigoa.ac.in/drs/handle/unigoa/662
dc.description.abstract	The nephelinite occurs as a N-S trending plug (500 x 200 m.) intrusive into basalts. The rock is porphyritic and principally composed of complexly zoned phenocrysts of clinopyroxene, Fe-Ti oxide and olivine (less than 5 percent) in a fine grained groundmass dominated by clinopyroxene, nepheline and Fe-Ti oxides. Mineralogically and chemically the rocks vary between pyroxene melanephelinites and nephelinites.The mineral chemistry implies that the magma has undergone varying degrees of polybaric crystallisation in a subcrustal magma chamber with mixing of more fractionated magma with primitive pulses in which are incorporated disaggregated mantle xenolith phases.	en_US
dc.publisher	Springer Verlag (Germany)	en_US
dc.subject	Earth Science	en_US
dc.title	Magma fractionation and mixing in nephelinite plug associated with deccan magmatism at Murud-Janjira, south of Bombay, India	en_US
dc.type	Journal article	en_US
dc.identifier.impf	y