A note on the occurrence of syenite porphyry near Kundur, Mandya district, Karnataka [India]

Mahabaleswar, B. (1977) A note on the occurrence of syenite porphyry near Kundur, Mandya district, Karnataka [India]. Vignana Bharathi (Vignana Bharati Bangalore University journal of science), 3 (1). pp. 91-2. ISSN 0377-8487

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Abstract

The occurrence of syenite from this area is noted. The syenite constitutes the elongated narrow bouldery outcrop and occurs in contact with coarse-​grained nonporphyritic pink granite. The tablets of feldspars are arranged in parallel rows imparting a flow structure to the rock. There is a variation in grain size and texture from margin to the center. The essential components are alkali pyroxene, alkali amphibole, K-​feldspar, and plagioclase; the accessories are magnetite, apatite, and sphene. The optical properties of the alkali pyroxene indicate that it is a sodian augite. The alkali amphibole is a greenish yellow variety and is strongly pleochroic. The optical properties indicate that it is probably arfevedonite. The modal and the chem. compn. of the rock is given.

Item Type: Article
Subjects: Faculty of Science > Earth Sciences > Geology
Divisions: Jnana Bharathi / Central College Campus > Department of Geology
Depositing User: Ms. Deepa M Kolli
Date Deposited: 22 Sep 2016 05:16
Last Modified: 22 Sep 2016 05:16
URI: http://eprints-bangaloreuniversity.in/id/eprint/5918

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