东天山成矿带典型铜、金矿床成矿流体与成矿作用研究
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摘要
东天山成矿带金矿、铜矿产出众多,成矿年龄多集中在石炭—二叠纪,矿床的形成与区域碰撞造山构造演化背景高度吻合。该区典型铜、金矿成矿流体包裹体相对小且少,主要为气液两相包裹体,含CO_2包裹体较少,未见含子矿物包裹体。成矿流体主要具中低温、低盐度、低密度特征。氢氧同位素特征表明,成矿流体具岩浆水与大气水混合来源特点。矿种不同成矿流体差异明显不同,同一矿种成因类型不同,流体特征也有显著差异。东天山地区区域大地构造演化控制了矿床的产出,韧性剪切带精准定位了矿床产出的时间和空间。
The formation of gold deposits and copper deposits in the East Tianshan metallogenic belt is mostly concentrated in the Carboniferous-Permian, and the formation of deposits is in good agreement with the background of the regional collision orogenic tectonic evolution. The inclusions of typical copper and gold mineralization in this area are mainly gas-liquid two-phase inclusions, and the CO2 inclusions are less and smaller. The ore-forming fluids are mainly characterized by low temperature, low salinity and low density. The hydrogen and oxygen isotopic characteristics indicate that the ore-forming fluid has the characteristics of mixed source that consist of magmatic water and atmospheric water. The same ore type and different deposit types have different ore fluid characteristics. The regional tectonic evolution controls the output of the deposit, while the ductile shear zone precisely locates the time and space of the deposit.
The formation of gold deposits and copper deposits in the East Tianshan metallogenic belt is mostly concentrated in the Carboniferous-Permian, and the formation of deposits is in good agreement with the background of the regional collision orogenic tectonic evolution. The inclusions of typical copper and gold mineralization in this area are mainly gas-liquid two-phase inclusions, and the CO2 inclusions are less and smaller. The ore-forming fluids are mainly characterized by low temperature, low salinity and low density. The hydrogen and oxygen isotopic characteristics indicate that the ore-forming fluid has the characteristics of mixed source that consist of magmatic water and atmospheric water. The same ore type and different deposit types have different ore fluid characteristics. The regional tectonic evolution controls the output of the deposit, while the ductile shear zone precisely locates the time and space of the deposit.
引文
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[14]黄志新,何中波,秦明宽,等.氢氧同位素示踪体系中σD-σ~(18)O图解应用的探讨--兼论夹皮沟金矿成矿流体来源[J].矿床地质,2012,31(S1):555-556.
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[17]赵泽南,王银宏,王建平,等.东天山土屋铜矿闪长玢岩地球化学、U-Pb年代学及其地质意义[J].矿物学报,2014,(4):512-520.
[18]李华芹,陈富文.东疆小热泉子铜锌矿床成岩成矿作用年代学及矿床成因讨论[J].矿床地质,2002,(S1):401-404.
[19]刘重芃,杨红梅,段瑞春,等.东天山马头滩金矿的成矿时代及其地质意义[J].地质通报,2014,(6):912-923.
[2]谭文娟,魏俊浩,郭大招,等.地质流体及成矿作用研究综述[J].矿产与地质,2005,19(3):227-232.
[3]王莉娟,王京彬,王玉往,等.新疆准噶尔-东天山地区产于韧性剪切带中的金矿床成矿流体与碳、硫、铅同位素[J].地质论评,2006,(4):486-493.
[4]王志良,毛景文,吴淦国,等.新疆东天山石英滩金矿流体包裹体地球化学[J].地质与勘探,2003,39(2):6-10.
[5]张达玉,周涛发,袁峰,等.新疆东天山康古尔剪切带西段金矿床的成矿流体特征及其地质意义[J].矿床地质,2012,31(3):555-568.
[6]王义天,张文智,王磊,等.新疆东天山红石金矿床成矿流体和成矿物质来源示踪[J].岩石学报,2007,(8):1998-2006.
[7]肖凡.新疆香山铜镍矿区热液作用性质及其成矿潜力研究[J].资源调查与环境,2014.
[8]刘申态,吕新彪,曹晓峰,等.新疆小热泉子铜(锌)矿床同位素地球化学研究及其意义[J].地质与勘探,2011,47(4):624-632.
[9]刘敏,王志良,张作衡,等.新疆东天山土屋斑岩铜矿床流体包裹体地球化学特征[J].岩石学报,2009,(6):1446-1455.
[10]王京彬,王玉往,何志军.东天山大地构造演化的成矿示踪[J].中国地质,2006,33(3):461-469.
[11]陈衍景,倪培,范宏瑞,等.不同类型热液金矿系统的流体包裹体特征[J].岩石学报,2007,9(9):2085-2108.
[12]王宗社.新疆小热泉子铜矿床成因[J].地质科技情报,2006,25(3):68-71.
[13]张连昌,姬金生,李华芹,等.东天山康古尔塔格金矿带两类成矿流体地球化学特征及流体来源[J].岩石学报,2000,(4):535-541.
[14]黄志新,何中波,秦明宽,等.氢氧同位素示踪体系中σD-σ~(18)O图解应用的探讨--兼论夹皮沟金矿成矿流体来源[J].矿床地质,2012,31(S1):555-556.
[15]Taylor,H P.The application of Oxygen and Hydrogen Isotope Studies Problems of Hydrothermal Alteration and Ore Deposition[J].Economic Geology,1974,6(69):843-883.
[16]张理刚.稳定同位素在地质科学中的应用[M].西安:陕西科学技术出版,1985.
[17]赵泽南,王银宏,王建平,等.东天山土屋铜矿闪长玢岩地球化学、U-Pb年代学及其地质意义[J].矿物学报,2014,(4):512-520.
[18]李华芹,陈富文.东疆小热泉子铜锌矿床成岩成矿作用年代学及矿床成因讨论[J].矿床地质,2002,(S1):401-404.
[19]刘重芃,杨红梅,段瑞春,等.东天山马头滩金矿的成矿时代及其地质意义[J].地质通报,2014,(6):912-923.