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

Year

2005

Authors

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Jayapaul, D.

Petrology of A-type Hornblende Granite and Fayalite Granite Enclaves from cDML, East Antarctica: Some Constraints on their Origin

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Authors

D. Jayapaul ¹, Amitava kundu ², M. P. Gaur ¹, K. V. Krishnamurthy ³

Affiliations
1 Antarctica Division, Geological Survey of India, NH 5P, NIT, Faridabad- 121001., IN
2 EPMA Laboratory, Geological Survey of India, NH SP, Faridabad- 121001., IN
3 AMSE, Geological Survey of India, Bangalore-560078, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 65, No 5 (2005), Pagination: 562-576

Abstract

The Skorvestallen batholith intrusive into granulitic crust consists of dominant coarse-grained pink granite, small rounded bodies of greenish grey fayalite granite, stocks of grey porphyritic biotite granite and porphyritic fayalite granite. These weakly peraluminous granites show A-type signatures with characteristic high Fe/(Fe + Mg), TilMg, HFSE such as Y and Zr, LREE and Zn. The granites crystallized at high temperatures and were emplaced at mid-crustal pressures. The paper discusses their possible mode of origin based on petrochemical studies.

Keywords

A-type granites, Petrology, Petrochemistry, Genesis, East Antarctica.

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