Chemical types of amphiboles from the Tyrnyauz deposit |
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Authors: | P N Gramenitskaya E N Gramenitskii O V Kononov |
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Institution: | 1. Faculty of Geology, Moscow State University, Moscow, Russia
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Abstract: | Based on the results of microprobe analyses, six groups of calcium amphiboles were distinguished for the Tyrnyauz deposit. Group I (mainly edenite) includes amphiboles of hornfels and periskarn rocks. Groups II-VI (actinolite-hastingsite series) are related to post-skarn metasomatic rocks of the productive stage after hornfels (II), the tonalite and plagiogranite complex (III), ultrabasic rocks (IV), pyroxene-plagioclase periskarn rocks (V), and skarn (VI). Group IV is represented by actinolite; group VI, by hastingsite; groups II, III, and V, by hornblende varieties. |
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