Chronology and Geochemistry of the Transitional Mineralized Mafic—Ultramafic Rock Bodies in the Eastern Tianshan Mountains
详细信息
- 责任者：Li Dedong (Beijing Institute of Geology for Mineral Resources ; Beijing 100012 ; China) ; Wang Yuwang
- 刊名：Geological Review
- 出版年：2012
- 卷期：58(6)
- 关键词：镁铁质岩 ; mafic rocks ; 超镁铁质岩 ; ultramafics ; 天山 ; Tianshan Mountains
- 页码：p.1145-1160
- 图表：8 illus., 4 tables, 57 refs.
- 分类号：0801,1001,
- issnNo：ISSN0371-5736
- isbnNo：CN11-1952/P
摘要
A series of transitional mafic—ultramafic rocks related to both copper—nickel sulfide and vanadium—titanium magnetite occurred in the Eastern Tianshan Mountains, such as the Xiangshanxi, the Niumaoquan, Tudunnan (Er’hongwa) and Hongliangzi mafic—ultramafic rocks. With zircon U-Pb and amphibole 40Ar/39Ar thermochronology method, the ages of the Niumaoquan, the Er’hongwa and the Hongliangzi mafic—ultramafic rocks can be obtained. The results show that the Niumaoquan mafic—ultramafic rock emplaced at the age of (289.7±2.4) Ma, Er’hongwa rock at (274.2±5.7) Ma and Hongliangzi rock at (309.7±1.5) Ma. In addition, the major elements, trace elements, REE and Sr-Nd isotopic compositions of these mafic—ultramafic rocks are analyzed.