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地质科学  2010, Vol. 45 Issue (02): 537-550    DOI:
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新疆哈密土屋铜矿床地质和地球化学特征
韩春明1 肖文交1 潘成泽2 李月臣2 颜启明2 曲军峰1 敖松坚1 张继恩1 郭谦谦1 马冲3 万博1
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
Geological and geochemical characteristics of the Tuwu 
porphyry copper deposits in Hami|Xinjiang
Han Chunming1 Xiao Wenjiao1 Pan Chengze2 Li Yuechen2 Yan Qiming2 Qu Junfeng1 Ao Songjian1 Zhang Jien1 Guo Qianqian1 Ma Chong3 Wan Bo1
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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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(367~358Ma); 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     
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〖CS%0,0,0,0〗〖CS〗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.

Key wordsPorphyry copper deposit   Graniteporphyry   Tuwu   Xinjiang   
收稿日期: 2009-12-16; 出版日期: 2010-04-25
基金资助:

新疆国家“十一五”国家科技支撑计划重点项目(编号:2007BAB5B04,2007BAB07B03-01-01)和国家重点基础研究发展规划项目(编号:2007CB411307)共同资助。

引用本文:   
. 2010, 新疆哈密土屋铜矿床地质和地球化学特征. 地质科学, 45(02): 537-550.
. Geological and geochemical characteristics of the Tuwu 
porphyry copper deposits in Hami|Xinjiang[J]. Chinese Journal of Geology, 2010, 45(02): 537-550.
 
没有本文参考文献
[1] 关维娜1 董连慧2. 新疆西准包古图斑岩型铜钼矿床地质特征及流体包裹体研究[J]. 地质科学, 2010, 45(03): 873-884.
[2] 潘成泽1 李月臣1 颜启明1 敖松坚2. 新疆东天山晚古生代地壳增生和成矿作用[J]. 地质科学, 2010, 45(01): 30-040.
 
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