Mineral chemistry of hornblendes from the charnockites of Karnataka, India

Mahabaleswar B. and Vasant Kumar I. R.: Mineral chemistry of hornblendes from the charnockites of Karnataka, India. In: Acta mineralogica-petrographica, (26) 1. pp. 115-123. (1983)

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Abstract

Calciferous amphiboles found in the charnockites of Karnataka have been analysed for major elements. The majority of the analysed amphiboles are contained wnhin a narrow range of Fe,ot/ /Feto, + Mg values. They show all the chemical characteristics of high alumina, high titanium and high alkali hornblendes from other granulite facies area. They can be termed ferroan pargasitic hornblendes according to the nomenclature of LEAKE [1978]. The variation of Si—A1 in the hornblendes is attributed to influence of pressure, whereas the Ti variation is due to a combination of indépendant parameters namely, temperature of metamorphic crystallisation and oxygen fugacity. The Aliv and Alvl relationship in the hornblendes has been considered as a function of Ti substitutions.

Item Type: Article
Journal or Publication Title: Acta mineralogica-petrographica
Date: 1983
Volume: 26
Number: 1
ISSN: 0365-8066
Page Range: pp. 115-123
Language: English
Publisher: University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/39403/
Uncontrolled Keywords: Kőzettan, Ásványtan, Földtan
Additional Information: Bibliogr.: p. 122-123. ; ill. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.05. Earth and related environmental sciences
Date Deposited: 2016. Oct. 17. 09:25
Last Modified: 2022. Jul. 26. 08:28
URI: http://acta.bibl.u-szeged.hu/id/eprint/24714

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