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| 东天山黄山岩体的侵位时代及其地质意义 | |
| 引用本文： | 张小连,吴昌志,黄建华,顾连兴,张遵忠,雷如雄.东天山黄山岩体的侵位时代及其地质意义[J].地质科技情报,2012,31(1):22-26. |
| 作者姓名： | 张小连 吴昌志 黄建华 顾连兴 张遵忠 雷如雄 |
| 作者单位： | 1. 河南省煤田地质局三队,河南新乡453003; 2. 南京大学内生金属矿床成矿机制国家重点实验室,南京210093;南京大学地球科学系,南京210093 3. 新疆大学地质勘查与工程学院,乌鲁木齐,830046 4. 有色金属华东地质勘查局,南京,210007 |
| 摘 要： | 东天山黄山—镜儿泉地区分布有众多镁铁质—超镁铁质岩体,岩体成群成带分布,受区域性韧性剪切带和断裂构造控制.为进一步确定黄山—镜儿泉基性—超基性岩带的侵位时代、成因和大地构造背景,对选自黄山岩体辉长岩相中单颗粒锆石进行了LA-ICP-MS U-Pb定年研究,将其结果(284.5±2.5)Ma]与黄山岩体和黄山—镜儿泉一带其他基性—超基性岩中已有的定年成果进行了对比,并结合近年来该区研究成果,分析得到黄山辉长岩侵位于晚石炭世—早二叠世,此时正值东天山后碰撞大规模岩浆侵位和成矿时期.黄山镁铁质—超镁铁质岩带形成于后碰撞的伸展构造环境. |
| 关 键 词： | 辉长岩 基性-超基性 LA-ICP-MS锆石年代学 东天山 |
Geochronology and Its Geological Significance of the Huangshan Intrusion in Eastern Tianshan,Xinjiang |
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| ZHANG Xiao-lian , WU Chang-zhi , HUANG Jian-hua , GU Lian-xing , ZHANG Zun-zhong , LEI Ru-xiong.Geochronology and Its Geological Significance of the Huangshan Intrusion in Eastern Tianshan,Xinjiang[J].Geological Science and Technology Information,2012,31(1):22-26. | |
| Authors: | ZHANG Xiao-lian WU Chang-zhi HUANG Jian-hua GU Lian-xing ZHANG Zun-zhong LEI Ru-xiong |
| Institution: | 2a,2b(1.Henan No.3 Coalfield Geologic Exploration Team,Xinxiang Henan 453003,China; 2a.State Key Laboratory for Endogenic Metal Deposits Research; 2b.Department of Earth Sciences,Nanjing University,Nanjing 210093,China; 3.School of Geological Survey and Engineering,Xinjiang University,Urumqi 830046,China; 4.Eastern China Geological and Mining Organisation for Non-ferrous Metals,Nanjing 210007,China) |
| Abstract: | The area of Huangshan-Jing’erquan in eastern Tianshan distributes numerous mafic-ultramafic instrusions which are emplaced in groups and in zones and controlled by regional ductile shearing zone and fault structure.To further determine the Huangshan-Jing’erquan mafic-ultramafic belt emplacement age,genesis and geotectonic setting,this paper selected from the Huangshan-Jing’erquan phase of gabbro lithofacies single-grain zircon LA-ICP-MS U-Pb dating.This paper contrasted the result (284.5±2.5)Ma] with the existing dating work of Huangshan rock mass and Huangshan-Jing’erquan other mafic-ultramafic rock,and combined with the area in recent research.It is concluded that Huangshan gabbro is emplaced in the Late Carboniferous-Early Permian(284.5±2.5)Ma],which is eastern Tianshan rear collision massive magma emplacement and mineralization period.Huangshan mafic-ultramafic instrusions are formed in the surroundings of post-collision extensional structure. |
| Keywords: | gabbro mafic-ultramafic LA-ICP-MS U-Pb zircon chronology eastern Tianshan |
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