The geochemistry characteristic of Sidingheishan mafic-ultramafic layered intrusion,East Tianshan,Xinjiang
The Sidingheishan layered intrusion is located in the eastern of the Huangshan mafic-ultramafic rocks belt,East Tianshan,large-scale,northeast trending,can be divided into north and south intrusion,composes of clinopyroxene peridotite,olivine pyroxenite,olivine norite-gabbro,olivine gabbro,pyroxene amphibolite,gabbro,hornblende gabbro,diorite,and the ultramafic rock phase and gabbro phase often showed a rhythm with interbedded.The petrochemical compositions belong to the tholeiitic series.The chondrite-normalized REE patterns are flat type and positive Eu anomalies,generally enriched in LILE (Rb,Ba,U),significant positive anomalies of Sr and Nb,Ta loss.The Th/U ratio characteristic and Th/Yb versus Nb/Yb and La/Ba versus La/Nb diagrams show that the magma source of the Sidingheishan intrusion may be the modified lithosphere mantle by subduction.
Tao Sun Zhuang-Zhi Qian Ke He Zhu-Ming Wang Jiang-Jiang Zhang Jiang-Jiang Zhang
Key Laboratory of Western Chinas Mineral Resources and Geological Engineering,Ministry of Education;College of Earth Science and Recourses,Changan University,Xian 710054,China
国际会议
贵阳
英文
278-280
2012-06-16（万方平台首次上网日期，不代表论文的发表时间）