• 责任者：Kou Caihua (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Zhaochong
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2011
• 卷期：30(3)
• 关键词：苦橄玢岩 ; picrite porphyry ; 单斜辉石 ; clinopyroxene ; 云南 ; Yunnan Province
• 页码：p.449-462
• 图表：7 illus., 5 tables, 40 refs.
• 分类号：0801
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

The Jianchuan picritic porphyrite consists predominantly of olivine, clinopyroxene and plagioclase. In this paper, the authors determined chemical composition of clinopyroxene from the picritic porphyrite and picritic cumulate from Erlong and Manyuan areas in detail by electron microprobe analysis. The results show that most clinopyroxenes in Jianchuan area are composed of augite, which contains relatively low TiO₂(0.62%～2.84%), Al₂O₃(1.86%～5.15%) and Na₂O(0.23%～0.61%). The results also show that the crystallization temperature (1 324～1 428 ℃) and pressure (1.5～2.9 GPa) of clinopyroxenes in Erlong and Manyuan picritic porphyrite were predominantly lower than the crystallization temperature (1 439～1 462 ℃) and pressure (3.0～3.2 GPa) of clinopyroxenes in Manyuan picritic cumulate, and the formation depth of clinopyroxene in Manyuan picritic cumulate might have been larger than that in Erlong and Manyuan picritic porphyrite.