新疆西准噶尔提依尔金矿床氢、氧、硫同位素地球化学研究
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摘要
提依尔金矿位于西准噶尔造山带达拉布特深大断裂北部,金矿化主要呈细脉浸染状、网脉状赋存于安山玢岩中,具有全岩矿化特征。依据矿脉的穿插关系和矿物组合特征,成矿过程经历了石英—钾长石阶段、石英—黄铁矿阶段、自然金—石英—硫化物阶段和石英—碳酸盐阶段。矿脉中石英δ~(18)O_(SMOW)介于16.5‰~18.2‰,δ~(18)O值为7.06‰~10.08‰,δD值为-88.9‰~-76.0‰,其中两件矿化晚阶段石英δ~(18)O分别为-0.69‰和-0.3‰。黄铁矿和毒砂的硫同位素组成δ~(34)S为-1.2‰~+1.7‰。研究结果表明:提依尔金矿床主成矿期成矿流体以岩浆热水为主体,晚期有大气降水的加入,成矿流体中的硫来源于深部岩浆或地幔。
Tiyier gold deposit is located at the north of Dalabute deep fault in western Junggar Orogen,.Gold mineralization,which mainly occurs as veinlet-disseminated and massive,is widely distributed within andesitic porphyrite rocks. Based on cross-cutting relationship and mineral assemblages of ore veins,it show that the ore-forming process underwent four stages as follows: quartz-potassium feldspar stage(Ⅰ),quartz-pyrite stage( Ⅱ),gold-quartz-sulfide stage( Ⅲ),and quartz-carbonatite stage( Ⅳ). The results show that quartz inclusions δ~(18)O_(SMOW) of early and major ore-forming stage vary from 16.5‰ ~ 18.2‰,δ~(18)O of quartz-balance water range from7.06‰~ 10.08‰,δD range from-88.9‰ ~-76.0‰; δ~(18)O of two late mineralization stage samples are-0.69‰ and 0.3‰ respectively. δ~(34)S of pyrite and arsenopyrite from gold bearing ore vary from-1.2‰ ~ +1.7‰. The results indicate that the Ore-forming fluid ofⅠ-Ⅲ stage is mainly derived from magma,with part of meteoric water,and the last stage was mixed with atmospheric water.,which indicate the sulfur in the fluids was derived from deep-seated magma or mantle.
Tiyier gold deposit is located at the north of Dalabute deep fault in western Junggar Orogen,.Gold mineralization,which mainly occurs as veinlet-disseminated and massive,is widely distributed within andesitic porphyrite rocks. Based on cross-cutting relationship and mineral assemblages of ore veins,it show that the ore-forming process underwent four stages as follows: quartz-potassium feldspar stage(Ⅰ),quartz-pyrite stage( Ⅱ),gold-quartz-sulfide stage( Ⅲ),and quartz-carbonatite stage( Ⅳ). The results show that quartz inclusions δ~(18)O_(SMOW) of early and major ore-forming stage vary from 16.5‰ ~ 18.2‰,δ~(18)O of quartz-balance water range from7.06‰~ 10.08‰,δD range from-88.9‰ ~-76.0‰; δ~(18)O of two late mineralization stage samples are-0.69‰ and 0.3‰ respectively. δ~(34)S of pyrite and arsenopyrite from gold bearing ore vary from-1.2‰ ~ +1.7‰. The results indicate that the Ore-forming fluid ofⅠ-Ⅲ stage is mainly derived from magma,with part of meteoric water,and the last stage was mixed with atmospheric water.,which indicate the sulfur in the fluids was derived from deep-seated magma or mantle.
引文
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安芳,朱永峰.2007.新疆哈图蚀变岩型矿体地质和地球化学研究[J].矿床地质,26(6):621-633.
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韩宝福,季建清,宋彪,等.2006.新疆西准噶尔晚古生代陆壳垂向生长(Ⅰ)---后碰撞深成岩浆活动的时限[J].岩石学报,22(5):1077-1086.
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金成伟,张秀琪.1993.新疆西准噶尔花岗岩类的时代及其成因[J].地质科学,28(1):28-36.
申萍,沈远超,刘铁兵,等.2008.新疆西北缘晚古生代金铜成矿作用与构造演化[J].岩石学报,24(5):1087-1100.
申萍,沈远超,潘成泽,等.2010.新疆哈图-包古图金铜矿集区锆石年龄及成矿特点[J].岩石学报,26(10):2879-2893.
沈远超,金成伟.1993.西准噶尔地区岩浆活动与金矿化作用[M].北京:科学出版社,113-227.
史建杰,陈宣华,丁伟翠,等.2017.中亚造山带西准噶尔晚古生代洋陆转换与构造演化---来自晚石炭世流纹岩的证据[J].地质力学学报,23(1):150-160.
苏玉平,王强,侯广顺,等.2006.新疆西准噶尔达拉布特构造带铝质A型花岗岩的地球化学研究[J].地球化学,35(1):55-67.
王莉娟,王京彬,王玉往,等.2004.新疆准噶尔地区金矿床成矿流体稀土元素地球化学特征[J].岩石学报,20(4):977-987.
王莉娟,朱和平.2006.新疆准噶尔盆地西缘哈图金矿成矿流体[J].中国地质,33(3):666-671.
王瑞,朱永峰.2007.西准噶尔宝贝金矿地质与容矿火山岩的锆石SHRIMP年龄[J].高校地质学报,13(3):590-602.
肖文交,舒良树,高俊,等.2008.中亚造山带大陆动力学过程与成矿作用[J].新疆地质,26(1):4-8.
尹继元,袁超,王毓婧,等.2011.新疆西准噶尔晚古生代大地构造演化的研究活动记录[J].大地构造与成矿学,35(2):278-291.
张弛,黄萱.1992.新疆西准噶尔蛇绿岩形成时代和环境的探讨[J].地质论评,38(6):509-524.
朱永峰,何国琦,安芳.2007.中亚成矿域核心地区地质演化与成矿规律[J].地质通报,26(9):1167-1177.
Ohmoto H and Rye R O.1979.Isotopes of sulfur and carbon.In:Bames H L(ed).Geochemistry of hydrothermal ore deposits[J].New York:John Wiley&Sons,509-567.
Ohmoto H.1986.Stable isotope geochemistry of ore deposits[J].Reviews in Mineralogy and Geochemistry,16(1):491-559.
Taylor H P.1974.The application of oxygen and hydrogen isotope studies to problems of hydrothermal alteration and ore deposition[J].Economic Geology,69(6):843-883.
安芳,朱永峰.2007.新疆哈图蚀变岩型矿体地质和地球化学研究[J].矿床地质,26(6):621-633.
陈骏,王鹤年.2004.地球化学[M].北京:科学出版社,37-126.
陈宣华,王志宏,杨农,等.2010.中亚巴尔喀什成矿带萨亚克大型铜矿田矿床地质特征与成矿模式[J].地质力学学报,16(2):189-202.
陈宣华,杨农,叶宝莹,等.2011.中亚成矿域多核成矿系统西准噶尔成矿带构造体系特征及其对成矿作用的控制[J].大地构造与成矿学,35(3):325-338.
高山林,何治亮,周祖翼.2006.西准噶尔克拉玛依花岗岩体地球化学特征及其意义[J].新疆地质,24(2):125-130.
郭丽爽,刘玉琳,王政华,等.2010.西准噶尔包古图地区地层火山岩锆石LA-ICP-MS U-Pb年代学研究[J].岩石学报,26(2):471-477.
韩宝福,季建清,宋彪,等.2006.新疆西准噶尔晚古生代陆壳垂向生长(Ⅰ)---后碰撞深成岩浆活动的时限[J].岩石学报,22(5):1077-1086.
胡洋,王居里,王建其,等.2015.新疆西准噶尔庙尔沟岩体的地球化学及年代学研究[J].岩石学报,31(2):505-522.
金成伟,张秀琪.1993.新疆西准噶尔花岗岩类的时代及其成因[J].地质科学,28(1):28-36.
申萍,沈远超,刘铁兵,等.2008.新疆西北缘晚古生代金铜成矿作用与构造演化[J].岩石学报,24(5):1087-1100.
申萍,沈远超,潘成泽,等.2010.新疆哈图-包古图金铜矿集区锆石年龄及成矿特点[J].岩石学报,26(10):2879-2893.
沈远超,金成伟.1993.西准噶尔地区岩浆活动与金矿化作用[M].北京:科学出版社,113-227.
史建杰,陈宣华,丁伟翠,等.2017.中亚造山带西准噶尔晚古生代洋陆转换与构造演化---来自晚石炭世流纹岩的证据[J].地质力学学报,23(1):150-160.
苏玉平,王强,侯广顺,等.2006.新疆西准噶尔达拉布特构造带铝质A型花岗岩的地球化学研究[J].地球化学,35(1):55-67.
王莉娟,王京彬,王玉往,等.2004.新疆准噶尔地区金矿床成矿流体稀土元素地球化学特征[J].岩石学报,20(4):977-987.
王莉娟,朱和平.2006.新疆准噶尔盆地西缘哈图金矿成矿流体[J].中国地质,33(3):666-671.
王瑞,朱永峰.2007.西准噶尔宝贝金矿地质与容矿火山岩的锆石SHRIMP年龄[J].高校地质学报,13(3):590-602.
肖文交,舒良树,高俊,等.2008.中亚造山带大陆动力学过程与成矿作用[J].新疆地质,26(1):4-8.
尹继元,袁超,王毓婧,等.2011.新疆西准噶尔晚古生代大地构造演化的研究活动记录[J].大地构造与成矿学,35(2):278-291.
张弛,黄萱.1992.新疆西准噶尔蛇绿岩形成时代和环境的探讨[J].地质论评,38(6):509-524.
朱永峰,何国琦,安芳.2007.中亚成矿域核心地区地质演化与成矿规律[J].地质通报,26(9):1167-1177.