Stability of richterite<sub>50</sub>-tremolite<sub>50</sub> solid solution at high pressures and possible presence of sodium calcic amphibole under upper mantle conditions期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Stability of richterite₅₀-tremolite₅₀ solid solution at high pressures and possible presence of sodium calcic amphibole under upper mantle conditions

Authors:	Yu Hariya Shoichi Terada

Institution:	Department of Geology and Mineralogy, Hokkaido University, Sapporo 060,Japan

Abstract:	High pressure experiments have been made on the stability of richterite₅₀-tremolite₅₀ solid solution by the piston-cylinder type high pressure apparatus in the pressure range from 15 to 40 kb, at temperatures from 700 to 1150°C. This amphibole is stable up to 40 kb at 700°C, and the breakdown pressure gradually decreases with increasing temperatures. It is suggested that this amphibole, on the basis of high pressure experiments, may occur in the upper mantle.

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