Refine your search
Collections
Co-Authors
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Knight, K.
- Thermal Structure of the Lithosphere Beneath the Deccan Trap along the Western Indian Continental Margin: Evidence from Xenolith Data
Abstract Views :206 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, Goa University, Taleigao Plateau, Goa 403 206, IN
2 Danish Lithosphere Center, Oster Volgade 10, DK - 1350, Copenhagen, DK
3 Department of Earth Sciences, University of Florence, 50121 via G. la Pira, IT
1 Department of Geology, Goa University, Taleigao Plateau, Goa 403 206, IN
2 Danish Lithosphere Center, Oster Volgade 10, DK - 1350, Copenhagen, DK
3 Department of Earth Sciences, University of Florence, 50121 via G. la Pira, IT
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 54, No 6 (1999), Pagination: 585-598Abstract
Late alkaline lamprophyre-intrusives from the Deccan Trap along the western Indian continental margin entrain rare granulite and pyroxenite xenoliths some of which contain kaersutite ± phlogopite ± apatite ± scapolite ± sulphides providing evidence orfluid induced metasomatism.P-Testimates on carefully selected mafic granulite and pyroxenite xenoliths define a palaeogeotherm from 550°C, 5 kb to -830°C, 8.5 kb for the Mumbai region along the western continental margin. This elevated geotherm suggests advective heat transfer from magmas ponded near the crust mantle boundary.
Xenolith petrology coupled with seismic data suggests that the lower crust beneath Mumbai consists of mafic granulites under- and intra-plated by pyroxenites. Spinel peridotites interlayered with pyroxenites predominate below -20 km. The seismic Moho is located within the layered pile.