• 责任者：Huang Xingkai (State Key Laboratory of Geological Processes and Mineral Resources ; School of Earth Sciences and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Mo Xuanxue
• 刊名：Acta Petrologica Sinica
• 出版年：2011
• 卷期：27(9)
• 关键词：地幔 ; mantle ; 橄榄岩 ; peridotites ; 铼—锇计时 ; Re-Os dating ; 云南 ; Yunnan Province
• 页码：p.2646-2654
• 图表：4 illus., 2 tables, 36 refs.
• 分类号：0801
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

This study carried out petrological and geochemical research on the mantle-derived peridotitic xenoliths borne in Cenozoic akali-basalts in Maguan, Yunnan Province, southwestern China. The  results of five whole-rock Re-Os isotopic analysis show that the Os concentrations of the peridotitic xenoliths are relatively high(3.29×10^-9~3.78×10^-9), comparable to those of peridotite massif from orogenic belts, and the Re concentrations change in a relatively wide variation, ranging from 0.24×10-9 to 0.54×10^-9.The ¹⁸⁷Os/¹⁸⁸Os ratios of samples vary between 0.122 95 and 0.125 30.Neither ¹⁸⁷Re/¹⁸⁸Os ratios nor Al₂O₃ contents show correlation with ¹⁸⁷Os/¹⁸⁸Os ratios, indicating that the Re-Os isotopic system is not solely controlled by melt extraction process.