Xiangshanxi Composite Cu-Ni—Ti-Fe Deposit Belongs to Comagmatic Evolution Product：Evidences from Ore Microscopy，Zircon U-Pb Chronology and Petrological Geochemistry, Hami，Xinjiang，NW China
- 责任者：Xiao Qinghua (Key Laboratory of Mineral Resources ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Qin Kezhang
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(2)
- 关键词：铜矿 ; copper ores ; 镍矿 ; nickel ores ; 铀—铅计时 ; U-Pb dating ; 钒钛磁铁矿矿床 ; vanadium titano-magnetite deposit
- 页码：p.503-522
- 图表：12 illus., 4 tables, 92 refs.
- 分类号：1001,1300
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
This paper studied the geology, petrology，geochemistry and geochronology of the Xiangshan intrusion．By detailed observation in the field and under the microscope and electron microprobe analysis, the authors found the complicated paragenetic relationships between Cu-Ni sulfides and Ti-Fe oxides in disseminated Cu-Ni ore from Xiangshanxi．By high-precision SIMS zircon U-Pb dating，the authors obtained the concordant age of 278.6±1.8 Ma for Ti-Fe-bearing gabbros in Xiangshanxi，the age is almost identical to that of the Cu-Ni sulfide-bearing hornblend gabbro in the middle part of Xiangshan intrusion．These evidences provide the support for paragenetic relationships between Cu-Ni sulfide and Ti-Fe oxide mineralization in Xiangshanxi．The petrochemical characteristics of Xiangshan intrusion indicate that Xiangshan mafic-ultramafic complex are products of comagmatic evolution and show a trend of tholeiitic magmatic differentiation．