新疆东天山白石泉铜镍矿床基性-超基性岩体锆石U-Pb同位素年龄、地球化学特征及其对古亚洲洋闭合时限的制约

毛启贵,肖文交,韩春明,孙敏,袁超,闫臻,李继亮,雍拥,张继恩. 新疆东天山白石泉铜镍矿床基性-超基性岩体锆石U-Pb同位素年龄、地球化学特征及其对古亚洲洋闭合时限的制约[J]. 岩石学报, 2006, 22(1): 153-162.
引用本文: 毛启贵,肖文交,韩春明,孙敏,袁超,闫臻,李继亮,雍拥,张继恩. 新疆东天山白石泉铜镍矿床基性-超基性岩体锆石U-Pb同位素年龄、地球化学特征及其对古亚洲洋闭合时限的制约[J]. 岩石学报, 2006, 22(1): 153-162.
MAO QiGui~. Zircon U-Pb age and the geochemistry of the Baishiquan mafic-ultramafic complex in the Eastern Tianshan,Xinjiang province:constraints on the closure of the Paleo-Asian Ocean.[J]. Acta Petrologica Sinica, 2006, 22(1): 153-162.
Citation: MAO QiGui~. Zircon U-Pb age and the geochemistry of the Baishiquan mafic-ultramafic complex in the Eastern Tianshan,Xinjiang province:constraints on the closure of the Paleo-Asian Ocean.[J]. Acta Petrologica Sinica, 2006, 22(1): 153-162.

新疆东天山白石泉铜镍矿床基性-超基性岩体锆石U-Pb同位素年龄、地球化学特征及其对古亚洲洋闭合时限的制约

  • 基金项目:

    国家重点基础研究发展规划项目(2001CB409801)、国家自然科学基金项目(40172080)与香港研究基金项目(HKU7840/04P)联合资助.致谢 研究工作得到了西北大学大陆动力学重点实验室柳小明和第五春容、中国科学院地质与地球物理研究所李禾、靳新娣和李红艳,以及刘传周和万家亮的帮助.两位审稿人提出了批评和建设性意见.一并表示感谢.

Zircon U-Pb age and the geochemistry of the Baishiquan mafic-ultramafic complex in the Eastern Tianshan,Xinjiang province:constraints on the closure of the Paleo-Asian Ocean.

  • 白石泉铜镍硫化物矿床位于中天山北缘,阿齐库都克-沙泉子断裂带南侧,产于同源侵入基性-超基性复式岩体中。采用锆石激光剥蚀法(LA-ICP-MS)获得矿化辉长岩中锆石U-Pb年龄为281.2±0.9Ma。辉长岩和橄榄岩的地球化学数据表明白石泉含矿杂岩体具高Mg特征。岩石富集大离子亲石元素(Rb、Ba、K、Sr)、LREE和高场强元素(U、Pb),而具有Ce负异常和亏损高场强元素(Th、Nb、Ta、Zr、Hf)的特征。这些表明白石泉含矿杂岩体具有幔源特征和岛弧岩浆特征。结合对白石泉岩体地质特征和区域地质背景的综合分析,本文推断白石泉岩体形成于岛弧环境或活动陆缘环境,即早二叠世期间在东天山地区还存在俯冲作用,因而古亚洲洋至少应在早二叠世晚期或以后才闭合。
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出版历程
收稿日期:  2005-10-30
修回日期:  2005-12-20
刊出日期:  2006-01-31

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