| 新疆哈密土屋铜矿床地质和地球化学特征 |
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| 引用本文： | 韩春明,肖文交,潘成泽,李月臣,颜启明,曲军峰,敖松坚,张继恩,郭谦谦,马冲,万博.新疆哈密土屋铜矿床地质和地球化学特征[J].地质科学,2010,45(2):537-550. |
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| 作者姓名： | 韩春明 肖文交 潘成泽 李月臣 颜启明 曲军峰 敖松坚 张继恩 郭谦谦 马冲 万博 |
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| 作者单位： | 1.中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京 ,100029； ,2.新疆305项目办公室乌鲁木齐 830000； 3.中国科学院研究生院北京 100049 |
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| 基金项目： | 新疆国家国家科技支撑计划重点项目，科技部科研项目 |
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| 摘 要： | 土屋铜矿床是我国近年来发现的特大型斑岩铜矿床,其独特矿床地质背景和矿床规模已经引起国内外地质学界和矿业界的广泛关注;本文详细叙述该矿床的地质背景,对矿床的地质、地球化学特征进行系统研究和总结,对矿床的成矿作用动力学过程进行探讨。研究表明,该矿床成矿物质具有深部来源特征,而岩浆在侵位过程中受到上地壳物质一定程度的混染;成矿流体以岩浆水为主,天水和岩浆水的混合仅为少量;石英流体包裹体均一温度较低,但盐度较高;含矿斑岩体是多次脉动式侵位的,成岩时代主要集中于早石炭世(367～358 Ma);成矿时代为晚于成岩时代(347.3±2.1 Ma～322.7±3 Ma)。
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| 关 键 词： | 斑岩铜矿床 成矿流体 土屋 新疆 |
| 收稿时间： | 2009-12-16 |
| 修稿时间： | 2010-01-25 |
Geological and geochemical characteristics of the Tuwu porphyry copper deposits in Hami, Xinjiang |
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| Han Chunming,Xiao Wenjiao,Pan Chengze,Li Yuechen,Yan Qiming,Qu Junfeng,Ao Songjian,Zhang Jien,Guo Qianqian,Ma Chong,Wan Bo.Geological and geochemical characteristics of the Tuwu porphyry copper deposits in Hami, Xinjiang[J].Chinese Journal of Geology,2010,45(2):537-550. |
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| Authors: | Han Chunming Xiao Wenjiao Pan Chengze Li Yuechen Yan Qiming Qu Junfeng Ao Songjian Zhang Jien Guo Qianqian Ma Chong Wan Bo |
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| Institution: | 1.State Key Laboratory of Lithospheric Evolution|Institute of Geology and Geophysics|Beijing 100029； |2.Xinjiang 305 ;
Project Office| rümqi 830000； 3.Graduate School of Chinese Academy of Science, Beijing 100049 |
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| Abstract: | Located in the northern margin of the Zhungaer-Kazakesitan plate which this plate was collided with Trim plate,the Tuwu porphyry copper deposit is one of the important deposit in the well-known east Tianshan copper-concentrated region. Copper and copper mineralizations occur within the Late Devonian volcanic sequences of the Qi'eshan group. Sulfur isotopic analysis results reveal that sulfur of the ore fluids was mainly derived from deep sources,and the oxygen results reveal that magma was mainly derived from a mixed source of igneous rocks and upper crust rocks,it imply that the magma came from upper mantle,but was mixed with a small amount of crust material. Re-Os and Ar-Ar isotope dating show that copper deposit have two group ages,early Carboniferious(347.3±2.1 Ma)and middle Carboniferious(322.7±3 Ma),Single-grain zircon U-Pb dating results suggest that granite-porphyry emplacement at least two times(358～301 Ma),make-up the Devonian-Carboniferous Qi'eshan group of the island arc magmatic belt on the palaeogeographically margin between the Tarim plate and Zhungaer-Kazakesitan plate. |
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| Keywords: | Porphyry copper deposit Granite-porphyry Tuwu Xinjiang |
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