地质科学2018，Vol.53Issue(2)：586-593,8.DOI:10.12017/dzkx.2018.032
新疆兴地Ⅱ号铜镍矿床辉长岩SIMS锆石U-Pb年龄和地质意义
SIMS zircon age of the Xingdi No.2 complex in the Kuluketage area and its geological implications
摘要
Abstract
The Xingdi No.2 complex is composed mainly of basic and partly of ultrabasic rocks.Copper and nickel mineralization occurs in both interior and exterior of the complex.A gabbro sample yielded a SIMS U-Pb zircon age of 737±2 Ma (MSWD =0.038,95％ confidence level),which indicates that the Xingdi complex formed during the Nanhua period rather than Mesoproterozoic time.A number of studies suggest that there were three episodes of mantleplume activities,at ca.830 ～ 800 Ma,780 ～ 740 Ma and 650 ～ 630 Ma respecitively,during the break-up of supercontinent Rodinia within in the Tarim.The Xingdi intrusive suite formed in a Neoproterozoic continental rift setting,possibly related to mantle plume activities that led to the breakup of the Rodinia supercontinent.关键词
辉长岩/兴地Ⅱ号/SIMS锆石U-Pb/Rodinia超大陆Key words
Zircon SIMS U-Pb dating/Rodinian/Xingdi/Kuluketage分类
天文与地球科学引用本文复制引用
郭瑞清,柴凤梅,韩春明..新疆兴地Ⅱ号铜镍矿床辉长岩SIMS锆石U-Pb年龄和地质意义[J].地质科学,2018,53(2):586-593,8.基金项目
国家重点研发计划项目(编号:2017YFC0601206)、国家自然科学基金项目(编号:41772078,41762015)和天山成矿带地质矿产调查评价项目(编号:1212011120477)资助. （编号:2017YFC0601206）
