新疆库鲁克塔格地区基性-超基性岩的年代学研究及构造意义  

Ages and tectonic implications of the mafic-ultramafic intrusive rocks from the Quruqtagh domain, NW China

作　　者：吴功成[1] 丁嘉鑫[2] 王忠梅[2] 王庆飞[1] 韩春明[2] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《地质科学》2017年第2期545-570,共26页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金项目（编号：40272017）资助;致谢十分感谢中国科学院地质与地球物理研究所的李献华、李秋立、刘宇和唐国强诸位老师在SIMS锆石u-Pb实验过程中给予的大力支持和帮助;感谢香港大学赵国春教授和广州地球化学研究所袁超研究员对本文的审稿意见;在野外工作中得到了新疆第三地质大队的袁英霞高级工程师、吴永林高级工程师和中远公司俞昌明同志的悉心指导和大力支持.感谢国家305项目办公室马映军主任、王宝林主任对本研究给予的耐心指导和帮助.

摘　　要：塔里木克拉通的研究可以有助于理解中亚造山带元古代构造框架和Rodinia超大陆的形成过程。位于塔里木克拉通北缘的库鲁克塔格地区广泛分布有基性岩-超基性岩-碳酸岩，并且伴随有铜镍、铁磷和蛭石矿床，其典型矿床为兴地铜镍矿床、且干布拉克蛭石矿床、大西沟和卡乌留克铁磷矿床。SIMS锆石u—Ph年代学研究表明，大西沟铁磷矿床形成于古元古代（2452±10Ma），其它铜镍、铁磷和蛭石矿床（兴地、卡乌留克和且干布拉克）形成于新元古代（812—707Ma）。古元古代成矿作用与哥伦比亚超大陆的汇聚碰撞有关，而新元古代成矿作用形成于Rodinia超大陆裂解导致塔里木地幔柱活动有关的成矿动力学背景。The Tarim Craton is an important tectonic unit and a suitable target to investigate and understand the Proterozoic tectonic framework of the Central Asian orogenic belt and supercontinent Rodinia. Mafic-ultramafic-carbonatite rocks are widely distributed in the Quruqtagh domain of NE-tarim. In Quruqtagh, Cu-Ni, Fe-P and apatite-vermiculite deposits hosted in the mafic-uhramafic-carbonatite rocks occur in the Xingdi, Qieganbulake, Daxigou and Kawuliuke. These deposits related to the mafie-ultramafic-carbonatite rocks in Quruqtagh formed in the period between Paleoproterozoic and Neoproterozoic. The Paleoproterozoic Fe-P deposit is represented by the Daxigou deposit that yielded a SIMS U-Pb zircon age of 2 452± 10 Ma. The other Cu-Ni, Fe-P and apatite-vermiculite deposits hosted in the mafic-uhramafic rocks formed in the Neoproterozoic, represented by the Xingdi, Kawuliuke and Qieganbulake deposits that formed between 812 Ma and 707 Ma. The Paleoproterozoic mineralization event was coincident with the global collisional events that led to the assembly of the Paleo- Mesoproterozoic Columbia （Nuna） supercontinent. And the emplacement of these Neoproterozoic mafic-ultramafic-carbonatite rocks was related to a mantle plume event that led to the breakup of the Tarim Craton from the Rodinia supercontinent.

关 键 词：SIMS锆石U—Pb 基性岩-超基性岩-碳酸岩 库鲁克塔格 塔里木克拉通 新疆 

分 类 号：P588[天文地球—岩石学] P597[天文地球—地质学]