新疆乌拉根铅锌矿矿床地球化学特征及成因讨论
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摘要
为确定乌拉根铅锌矿床形成机制,对矿区不同类型岩石中的铅锌矿石进行了地球化学特征对比研究。结果显示,稀土元素数据表明不同类型的铅锌矿石的物质来源不同;铅同位素~(206 )Pb/~(204 )Pb,~(207)Pb/~(204)Pb,~(208)Pb/~(204)Pb比值分别为18.326～8.641 3,15.402～15.645 4,38.029～38.750 7,说明成矿物质主要来自造山带的上地壳;δ~(34)S为-26.09×10~(-3)～+14.6×10~(-3),硫同位素主要是来自经由细菌产生的硫化物和热解产生的有机硫;δ~(13)C_(V·PDB)(10~(-3))为4.2～-7.7,δ~(18 )O_(V·SMOW)(10~(-3))为20.9～31.9,显示成矿作用期间有外来流体活动特点;流体盐度为3.55%～13.07%,流体包裹体数据表明乌拉根铅锌矿的流体特征为低温中高盐度的热卤水。结合地质特征,认为乌拉根铅锌矿是一个早期以海底沉积成因为主,晚期以MVT成因为主的复合叠加性矿床。
To determine the formation mechanism ofWulagen lead-zinc ore deposit,the author carries out comparative study for the geochemical characteristics of the different rocks in the mining area.The results shown that,rare earth element data indicates different types of lead-zinc ore have different material source;The specific value of lead isotope ~(206)Pb/~(204 )Pb,~(207 )Pb/~(204 )Pb and ~(208)Pb/~(204 )Pb is 18.326～8.641 3,15.402～15.645 4and 38.029～38.750 7,which means the ore-forming matters are from the upper crust of the orogenic belt;δ~(34)S is 26.09×10~(-3)～+14.6×10~(-3),the sulfur isotope is mainly from the sulfide generated from the bacteria and the organic sulfur generated by pyrolysis;δ~(13 )C_V·_(PDB)(10~(-3))is 4.2～-7.7,δ~(18 )O_V·_(SMOW)(10~(-3))is 20.9～31.9,which shows that there's extraneous fluid activity features during the period of mineralization;The salinity of the fluid is 3.55%～13.07%,the fluid inclusion data shows that the fluid characteristic of the Wulagen lead-zinc ore is hot brine with high salinity in low temperature.Combining with geologic feature,it is thought that Wulagen lead-zinc ore is a composite additive ore deposit which is mainly formed by bottom deposit in the early stage,while the main reason in the late stage is MVT.
To determine the formation mechanism ofWulagen lead-zinc ore deposit,the author carries out comparative study for the geochemical characteristics of the different rocks in the mining area.The results shown that,rare earth element data indicates different types of lead-zinc ore have different material source;The specific value of lead isotope ~(206)Pb/~(204 )Pb,~(207 )Pb/~(204 )Pb and ~(208)Pb/~(204 )Pb is 18.326～8.641 3,15.402～15.645 4and 38.029～38.750 7,which means the ore-forming matters are from the upper crust of the orogenic belt;δ~(34)S is 26.09×10~(-3)～+14.6×10~(-3),the sulfur isotope is mainly from the sulfide generated from the bacteria and the organic sulfur generated by pyrolysis;δ~(13 )C_V·_(PDB)(10~(-3))is 4.2～-7.7,δ~(18 )O_V·_(SMOW)(10~(-3))is 20.9～31.9,which shows that there's extraneous fluid activity features during the period of mineralization;The salinity of the fluid is 3.55%～13.07%,the fluid inclusion data shows that the fluid characteristic of the Wulagen lead-zinc ore is hot brine with high salinity in low temperature.Combining with geologic feature,it is thought that Wulagen lead-zinc ore is a composite additive ore deposit which is mainly formed by bottom deposit in the early stage,while the main reason in the late stage is MVT.
引文
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[13]刘增仁,漆树基,田培仁,等.新疆乌拉根铅锌成矿带地质特征与找矿靶区优选[J].矿产勘查,2014,5(5):689-698.
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[17]高珍权,刘继顺,舒广龙,等.新疆乌恰地区中新生代盆地寻找热卤水成因的超大型铅锌矿床的地球化学证据[J].地质地球化学,2002,30(1):13-19.
[18]阳翔,谢世业,莫江平,等.新疆乌恰县乌拉根铅锌矿矿床地球化学特征及成因研究[J].矿产与地质,2012,26(6):483-496.
[19]田力丹,孙丰月,王力,等.吉林临江荒沟山铅锌矿床流体包裹体特征及矿床成因[J].世界地质,2017,36(3):836-849.
[20]韩凤彬,陈正乐,刘增仁,等.塔里木盆地西北缘乌恰地区乌拉根铅锌矿床S-Pb同位素特征及其地质意义[J].地质通报,2012,31(5):783-793.
[21]康亚龙,欧阳玉飞,樊俊昌,等.新疆乌恰地区乌拉根铅锌矿床热卤水成因探讨[J].四川地质学报,2009,29(4):400-405.
[22]韩凤彬.新疆乌恰乌拉根铅锌矿床成因研究:博士学位论文[D].北京:中国地质科学院,2012.
[23]Burnham C W.Magmas and Hydrothermal Fluids[M]//Barnes H L,ed.Geochemistry of Hydrothermal Ore Deposits.2nd ed.New York:Wiley,1979.
[24]权鸿雁,蔡文艳,张雪冰,等.内蒙古维拉斯托铅锌矿床流体包裹体特征及矿床成因研究[J].世界地质,2017,36(1):105-117.
[25]陈晶源,王长明,贺昕宇,等.河南瓦房铅锌矿床地质、流体包裹体和稳定同位素特征[J].吉林大学学报:地球科学版,2017,47(5):1383-1404.
[26]Leach D L,Sangster D F,Kelley K D.Sediment-hosted Leadzinc Deposit:A Global Perspective[J].Economic Geology,2005,100(3):561-607.
[27]张艳,韩润生,魏平堂,等.云南会泽矿山厂铅锌矿床流体包裹体特征及成矿物理化学条件[J].吉林大学学报:地球科学版,2017,47(3):719-733.
[28]王安建,曹殿华,高兰,等.论云南兰坪金顶超大型铅锌矿床的成因[J].地质学报,2009,83(1):43-45.
[29]罗俊杰,张建芳.Sedex型矿床地质特征及成矿物质来源示踪[J].资源环境与工程,2010,24(1):36-40.
[30]张长青,余金杰,毛景文,等.密西西比型(MVT)铅锌矿床研究进展[J].矿床地质,2009,28(2):195-210.
[31]David D L,Dwight C B,David H,et al.Sediment-Hosted Lead-Zinc Deposits in Earth History[J].Economic Geology,2010,105(3):593-625.
[2]吴向伟,王旭东,杨金明,等.新疆乌恰-阿图什地区铅锌铜矿调查评价报告[R].新疆:有色金属矿产地质调查中心新疆地质调查所,2006.
[3]祝新友,王京彬,刘增仁,等.新疆乌拉根铅锌矿床地质特征与成因[J].地质学报,2010,84(5):694-702.
[4]蔡宏渊,邓贵安,郑跃鹏.新疆乌拉根铅锌矿床成因探讨[J].矿产与地质,2002,16(1):1-5.
[5]谢世业,莫江平,杨建功,等.新疆乌恰县乌拉根新生代热卤水喷流沉积铅锌矿地质特征及成矿模式[J].矿床地质,2002,21(增刊1):495-498.
[6]张舒.南天山典型铅锌矿床地质-地球化学特征及成因研究[D].北京:中国地质大学(北京),2010.
[7]刘增仁,田培仁,祝新友,等.新疆乌拉根铅锌矿成矿地质特征及成矿模式[J].矿产勘查,2011,02(6):669-680.
[8]李志丹,薛春纪,董新丰,等.新疆乌恰县乌拉根铅锌矿床地质特征和S-Pb同位素组成[J].地学前缘,2013,20(1):40-54.
[9]韩凤彬,陈正乐,刘增仁,等.西南天山乌拉根铅锌矿床有机地球化学特征及其地质意义[J].矿床地质,2013,32(3):591-602.
[10]董新丰,薛春纪,李志丹,等.新疆喀什凹陷乌拉根铅锌矿床有机质特征及其地质意义[J].地学前缘,2013,20(1):129-145.
[11]刘宏林,胡庆雯,田培仁.关于新疆乌恰盆地中新生代砂岩型铅锌铜铀层次成矿问题浅析[J].矿产与地质,2010,24(2):113-119.
[12]李丰收,王伟,杨金明.新疆乌恰县乌拉根铅锌矿床地质地球化学特征及其成因探讨[J].矿产与地质,2005,19(4):335-340.
[13]刘增仁,漆树基,田培仁,等.新疆乌拉根铅锌成矿带地质特征与找矿靶区优选[J].矿产勘查,2014,5(5):689-698.
[14]陈洪英.新疆乌拉根铅锌矿成矿特征及找矿方向[J].新疆有色金属,2013,36(2):12-14.
[15]于琪,王可勇,韩屹,等.内蒙古白音诺尔铅锌矿床成矿流体特征[J].世界地质,2015,34(1):102-112.
[16]叶雷,刘增仁,漆树基,等.新疆康西铅锌矿地质特征及成矿潜力[J].矿产勘查,2014,5(3):422-430.
[17]高珍权,刘继顺,舒广龙,等.新疆乌恰地区中新生代盆地寻找热卤水成因的超大型铅锌矿床的地球化学证据[J].地质地球化学,2002,30(1):13-19.
[18]阳翔,谢世业,莫江平,等.新疆乌恰县乌拉根铅锌矿矿床地球化学特征及成因研究[J].矿产与地质,2012,26(6):483-496.
[19]田力丹,孙丰月,王力,等.吉林临江荒沟山铅锌矿床流体包裹体特征及矿床成因[J].世界地质,2017,36(3):836-849.
[20]韩凤彬,陈正乐,刘增仁,等.塔里木盆地西北缘乌恰地区乌拉根铅锌矿床S-Pb同位素特征及其地质意义[J].地质通报,2012,31(5):783-793.
[21]康亚龙,欧阳玉飞,樊俊昌,等.新疆乌恰地区乌拉根铅锌矿床热卤水成因探讨[J].四川地质学报,2009,29(4):400-405.
[22]韩凤彬.新疆乌恰乌拉根铅锌矿床成因研究:博士学位论文[D].北京:中国地质科学院,2012.
[23]Burnham C W.Magmas and Hydrothermal Fluids[M]//Barnes H L,ed.Geochemistry of Hydrothermal Ore Deposits.2nd ed.New York:Wiley,1979.
[24]权鸿雁,蔡文艳,张雪冰,等.内蒙古维拉斯托铅锌矿床流体包裹体特征及矿床成因研究[J].世界地质,2017,36(1):105-117.
[25]陈晶源,王长明,贺昕宇,等.河南瓦房铅锌矿床地质、流体包裹体和稳定同位素特征[J].吉林大学学报:地球科学版,2017,47(5):1383-1404.
[26]Leach D L,Sangster D F,Kelley K D.Sediment-hosted Leadzinc Deposit:A Global Perspective[J].Economic Geology,2005,100(3):561-607.
[27]张艳,韩润生,魏平堂,等.云南会泽矿山厂铅锌矿床流体包裹体特征及成矿物理化学条件[J].吉林大学学报:地球科学版,2017,47(3):719-733.
[28]王安建,曹殿华,高兰,等.论云南兰坪金顶超大型铅锌矿床的成因[J].地质学报,2009,83(1):43-45.
[29]罗俊杰,张建芳.Sedex型矿床地质特征及成矿物质来源示踪[J].资源环境与工程,2010,24(1):36-40.
[30]张长青,余金杰,毛景文,等.密西西比型(MVT)铅锌矿床研究进展[J].矿床地质,2009,28(2):195-210.
[31]David D L,Dwight C B,David H,et al.Sediment-Hosted Lead-Zinc Deposits in Earth History[J].Economic Geology,2010,105(3):593-625.
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