Chemical Study of Pyroxenes from the Charnockitic Rocks of Kondapalli (Andhra Pradesh), India, with Emphasis on the Distribution of Elements in Coexisting Pyroxenes

C. Leelanandam
Department of Mineralogy and Petrology, University of Cambridge1
1Present address: Geology Department, Osmania University, Hyderabad-7, India.

Summary: The chemical analyses, structural formulae, and trace element data are presented for 18 orthopyroxenes and 9 clinopyroxenes from the charnockitie rocks of Kondapalli, Andhra Pradesh, India. The chemistry of these pyroxenes is discussed and conclusions are drawn. The data are compared with the similar data available for the pyroxenes of the charnockites of the type area near Madras, some 200 miles south of Kondapalli. The element-distributional relationships between the coexisting pyroxenes are discussed and inferences are made regarding the temperature of crystallization of charnockite pyroxenes.

Mineralogical Magazine; June 1967 v. 36; no. 278; p. 153-179; DOI: 10.1180/minmag.1967.036.278.01
© 1967, The Mineralogical Society
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