• 责任者：Wang Yunfeng (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Zhaochong
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：29(12)
• 关键词：玄武岩 ; basalts ; 岩石地球化学 ; lithogeochemistry ; 云南 ; Yunnan Province
• 页码：p.4387-4403
• 图表：10 illus., 3 tables, 102 refs.
• 分类号：0801
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     The geochemical characteristics of picrite and basalt that we discovered recently in Hutiaoxia and Jin＇an area show that the primitive-mantle normalized incompatible element diagrams and Sr, Nd-Pb isotopic ratios are similar to those of OIB and Lijiang picrite, all of which display an enrichment of lithophile element （LILE） and relative depletion of high field strength element （HFSE） associated with an absence of Nb, Ta and Ti negative anomalies. All these observations suggest little lithosphere or crustal material contamination of uplifting magma. With the Klein and Langmuir method（1987）,the MgO content of the Hutiaoxia＇s and Jin＇an＇s primary magma are 15.81%~20.89% and 8.06%~13.84% respectively. Mantle temperature of both are 1493~1611℃ and 1055~1474℃ respectively. These mantle temperatures are lower than Shiman picritic melting temperature （1630~1680℃）,and a little higher than mantle temperature of normal asthenosphere. Thus, the axis of the Emeishan mantle plume should be located beneath the Lijiang County Town, Yunnan Province.