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SHRIMP Zircon U-Pb Age, Geochemistry, and Nd-Sr Isotopes of the Gaojiacun Mafic-Ultramafic Intrusive Complex, Southwest China
W.-G. Zhu;  H. Zhong;  H.-L. Deng;  A. H. Wilson;  B.-G. Liu;  C.-Y. Li;  Y. Qin
2006
发表期刊International Geology Review
卷号48期号:7页码:650–668
摘要

The Gaojiacun mafic-ultramafic intrusive complex in the Yanbian area, Sichuan Province, Southwest China, is a layered intrusive body that underwent intensive magmatic differentiation during two cumulative cycles. SHRIMP (sensitive high-resolution ion microprobe) zircon U-Pb data show that the Gaojiacun complex was formed at 825 ± 12 Ma. These mafic-ultramafic rocks are relatively enriched in light rare-earth elements (LREE) and large-ion lithophile elements (LILE), but are relatively depleted in high-field-strength elements (HFSE). They are characterized by low initial 87Sr/86Sr (0.7045 to 0.7050) and positive εNd(t) values (+1.3 to +4.5). The geochemical data indicate that the parental magma of the mafic/ultramafic rocks was derived from a depleted mantle source, and underwent fractional crystallization and crustal contamination. We suggest that the Gaojiacun complex was formed in a continental rift related to mantle superplume activity beneath the Neoproterozoic supercontinent Rodinia.

语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8258
专题矿床地球化学国家重点实验室
作者单位1.Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 46 Guanshui Road,
2.School of Geological and Computer Sciences, University of Natal, Durban 4041, South Africa
3.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, People’s Republic of China
4.Geological Team 601, Bureau of Metallurgical Geology and Mineral Exploration, Panzhihua 617027, People’s Republic of China
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GB/T 7714
W.-G. Zhu;H. Zhong;H.-L. Deng;A. H. Wilson;B.-G. Liu;C.-Y. Li;Y. Qin. SHRIMP Zircon U-Pb Age, Geochemistry, and Nd-Sr Isotopes of the Gaojiacun Mafic-Ultramafic Intrusive Complex, Southwest China[J]. International Geology Review,2006,48(7):650–668.
APA W.-G. Zhu;H. Zhong;H.-L. Deng;A. H. Wilson;B.-G. Liu;C.-Y. Li;Y. Qin.(2006).SHRIMP Zircon U-Pb Age, Geochemistry, and Nd-Sr Isotopes of the Gaojiacun Mafic-Ultramafic Intrusive Complex, Southwest China.International Geology Review,48(7),650–668.
MLA W.-G. Zhu;H. Zhong;H.-L. Deng;A. H. Wilson;B.-G. Liu;C.-Y. Li;Y. Qin."SHRIMP Zircon U-Pb Age, Geochemistry, and Nd-Sr Isotopes of the Gaojiacun Mafic-Ultramafic Intrusive Complex, Southwest China".International Geology Review 48.7(2006):650–668.
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