Geochronology of Intrusive Rocks and Associated Ores of the Kekesala-Aimusidaiyi Fe-Cu Deposit in the oft-com:office:smarttags" />West Tianshan , Xinjiang and Its Geologic Significance
详细信息
- 责任者：Gu Xuexiang (State Key Laboratory of Geological Processes and Mineral Resources ; School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Yongmei
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(6)
- 关键词：铁矿 ; iron ores ; 铜矿 ; copper ores ; 铀—铅计时 ; U-Pb dating ; 铼—锇计时 ; Re-Os dating ; 新疆 ; Xinjiang
- 页码：p.195-209
- 图表：10 illus., 2 tables, 49 refs.
- 分类号：1001
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
As a typical skarn-type deposit,the Kekesala-Aimusidaiyi Fe-Cu deposit is located in the Boluokenu polymetallic belt in the northern West Tianshan,Xinjiang Province.It occurred at the contact zone between the Husite intermediate-acidic intrusive rocks of Hercynian age and Upper Ordovician carbonate rocks.The timing of host rock intrusion and mineralization is unclear yet up to this study.LA-ICP-MS U-Pb dating of this study on zircon in monzogranite from the Husite intrusive body gave a concordia age of 368.0±3.6Ma and a weighted average age of 365.6±3.2 Ma,indicating its intrusion in the latest Devonian during the southward subduction of the North Tianshan ocean under the Yili plate.Re-Os dating on molybdenite from the skarn ore gave an isochron age of 295±11 Ma and a weighted average age of 288.3±1.5 Ma,indicating the earliest Permian mineralization during the post-collisional extension.Possibilities for the wide range of the timing between host rock intrusion and mineralization include that(1)the Husite intrusive body is a complex with multiple-stage intrusions,and the Mo mineralization as well as the skarn-type Fe-Cu mineralization were associated with the contact metasomatism of magmatic rocks intruded in the early Permian,and that(2)the skarn-type Fe-Cu mineralization was associated with the intrusion and metasomatism of the intermediate-acidic rocks in the late Devonian and,later in the early Permian,was superimposed by the Mo mineralization.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |