与火山岩容矿有关的海底热水沉积矿床硫同位素地球化学证据
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摘要
对国内与火山岩容矿有关的海底热水沉积矿床新疆阿巴宫、铁-铅锌矿、甘肃桦树沟铁-铜矿床、新疆阿舍勒铜锌矿、新疆阿尔泰可可塔勒铅锌矿等矿床硫化物进行硫同位素测定,这些矿床硫化物和硫酸盐的硫同位素组成分别为-4.3‰~1‰(阿巴宫)、+8.1‰~+33.4‰(桦树沟)、-3.3‰~+8.2‰(阿舍勒矿床硫化物)、-20.6‰~5.1‰(阿尔泰可可塔勒)。硫化物的硫同位素变化范围较小,硫同位素可以达到平衡,也可以没有达到平衡,获得的δ34SΣS值有+18‰~29‰之间,δ34SΣS值高;表明与火山岩控矿有关的海底热水沉积矿床热液中硫的来源,不是直接来源岩浆去气的硫,而是岩浆去气硫与海水硫酸盐硫混合而成的硫。
According to the S isotope dating of sulphides in volcanic-hosted submarine hydrothermal sedimentary deposits such as Abagong Fe-Pb-Zn deposit in Xinjiang,Huashugou Fe-Cu deposit in Gansu,Ashele CuZn deposit in Xinjiang,and Aertai Keketale Pb-Zn deposit in Xinjiang,the S isotope composition of the sulphide and sulphate respectively are-4.3‰~1‰(Abagong),+8.1‰~+33.4‰(Huashugou),-3.3‰~+8.2‰(sulphides in Ashele deposit),-20.6‰~5.1‰(Aertai Keketale).The variation range of S isotope in sulphides is relatively small,and S isotope may or may not have accomplished equilibrium state.The value ofδ34SΣSranges between +18‰~29‰,and the value ofδ34SΣSis high.It is suggested that the source of sulphur in hydrothermal fluid of volcanic-hosted submarine hydrothermal sedimentary deposits comes from sulphur mixed by magma-degassing sulphur and seawater sulphate sulphur,instead of direct source of magma-degassing sulphur.
According to the S isotope dating of sulphides in volcanic-hosted submarine hydrothermal sedimentary deposits such as Abagong Fe-Pb-Zn deposit in Xinjiang,Huashugou Fe-Cu deposit in Gansu,Ashele CuZn deposit in Xinjiang,and Aertai Keketale Pb-Zn deposit in Xinjiang,the S isotope composition of the sulphide and sulphate respectively are-4.3‰~1‰(Abagong),+8.1‰~+33.4‰(Huashugou),-3.3‰~+8.2‰(sulphides in Ashele deposit),-20.6‰~5.1‰(Aertai Keketale).The variation range of S isotope in sulphides is relatively small,and S isotope may or may not have accomplished equilibrium state.The value ofδ34SΣSranges between +18‰~29‰,and the value ofδ34SΣSis high.It is suggested that the source of sulphur in hydrothermal fluid of volcanic-hosted submarine hydrothermal sedimentary deposits comes from sulphur mixed by magma-degassing sulphur and seawater sulphate sulphur,instead of direct source of magma-degassing sulphur.
引文
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[33]耿新霞,杨健民,姚佛军,等.新疆阿勒泰阿巴宫铁矿遥感找矿综合信息研究[J].地质论评,2010,56(3):365-373.
[34]李学凯.新疆阿勒泰阿巴宫铅锌矿地质特征及成因初探[J].新疆有色金属,2004,(2):2-6.
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[36]吴志亮.热水沉积成岩成矿作用—以阿尔泰泥盆纪火山岩沉积盆地为例[M].北京:地质出版社,1996.
[2]Peter JM,Shanks WC III.1992.Sulfur,carbon and oxygen isotope variations in submarine hydrothermal deposits of Guaymas basin,Gulf of California[J].Geochim.Cosmochim.Acta,56:2025-2040.
[3]OHMOTO H.1972.Systematic of sulfur and carbon isotopes in hydrothermal ore deposits[J].Econ.Geol.,67:551-579.
[4]OHMOTO H,RYE R O.1979.Isotope of sulfur and carbon[A].In:Geochemistry of Hydrothermal Ore Deposits[M](ed.H.I.Barnes).2nd Edition.John Wiley and Sons.New York,509-561.
[5]OHMOTO H,Goldhaber M B.1997.Sulfur and carbon isotope[A].In:Geochemistry of Hydrothermal Ore Deposits[M].Third Edition,Barnes H1(ed.).New York:Wiley and sons,517-611.
[6]Sakai H,des Marais DJ,Ueda A et al.1984.Concentrations and isotope ratios of carbon,nitrogen and sulfur in ocean-floor basalts[J].Geochim.Cosmochim.Acta,48:2433-2441.
[6]Ohmoto H,Mizukami M,Prummond S E,Eldridge C S,Pisutha Arnond V and Lenaugh T C.1983.Chemical processesin Kuroko for mation[J].Economic Geology Monograph.5:570-604.
[7]Huston D L,Pehrsson S Eglington B M and Zaw K.2010.The geology and metallogeny of volcemic-hosted massive sulfide deposits:variations through geologic time and with tectonic setting[J].Econ Geology V105:571-591
[8]侯增谦,莫宣学.现代海底热液作用研究现状及发展方向[J].地学前缘,1996,3(3-4):263-273.
[9]侯增谦,浦边郎.古代与现代海底黑矿型块状硫化物矿床矿石地球化学比较研究[J].地球化学,1996,25(3):228-241.
[10]侯增谦,韩发,夏林圻,等.现代与古代海底热水成矿作用[M].北京:地质出版社,2003.
[11]李佑国,侯增谦.中国呷村VMS矿床:从矿石化学分析到地球化学模型[J].矿床地质,2001,20:119-128.
[12]姜福芝,王玉往.海相火山岩与金属矿床[M].北京:冶金出版社,2005.
[13]薛春纪,姬金生,卢登荣.北祁连镜铁山海底喷流沉积铁铜矿床[J].矿床地质,1997:154-165.
[14]蒋少涌,杨涛,李亮,等.大西洋洋中脊TAG热液区硫化物铅和硫同位素研究[J].岩石学报,2006,22(10):2597-2602.
[15]牛贺才,干学元,许继峰,等.中国新疆阿尔泰晚古生代火山作用及成矿[M].北京:地质出版社,2006:1-182.
[16]邬介人,干浦生,贾群子,等.海相火山沉积岩区铁-铜-硫及铁铜型矿床[M].北京:地质出版社,1999.
[17]王书来,陈克强,康吉昌,等.新疆阿尔泰山南缘产于麦兹泥盆纪火山-沉积盆地铅锌矿床稳定同位素特征[J].地质与勘探,2007,43(6):25-30.
[18]王京彬,秦克章,吴志亮,等阿尔泰南缘火山喷流沉积型铅锌矿床[M].北京:地质出版社,1998.
[19]夏林圻,夏祖春.北祁连山海相火山岩岩石成因[M].北京:地质出版社,1996.
[20]徐文炘,李蘅,陈民扬.新疆可可塔勒铅锌矿床形成硫铅同位素地球化学证据[J].矿产与地质,2015,26(6):511-515.
[21]周良仁,任秉琛,李金铭,等.阿舍勒铜-锌矿床成矿地质条件与成矿模式[M].陕西西安:西安交通大学出版社,1995:1-150.
[22]熊永柱,夏斌,林丽,等.热水沉积成矿作用研究现状与展望[J].矿产与地质,2005,19(3):733-238.
[23]邬介人.西北海相火山岩地区块状硫化物矿床[M].中国地质大学出版社,1994.
[24]夏林圻,夏祖春.北祁连山海相火山岩岩碱[M].地质出版社,1996.
[25]肖荣阁,杨忠芳,杨四东,等.热水成矿作用[J].地学前缘,1994,1(3-4):140-147.
[26]肖荣阁,张汉城,陈卉泉.热水沉积岩及矿物岩石标志[J].地学前缘,2001,8(4):379-385.
[27]Leach D L.,Bradley D C.,Huston D.,Pisarevsky S A.,Taylor R D.,and Gardoll S J.Sediment-hosted lead-zinc deposits in Earth history[J].ECONOMIC GEOLOGY,v.2010,105,P593-625.
[28]Rees CE.,Jenkins WJ.,Monster J.The sulfur isotopic composition of ocean water sulfate[J].Geochimica.Cosmochim.Acta,1978,42:377-381.
[29]Goodfellow W D.,and Peter J M.Sulphur isotope composition of the Brunswick No 12 massive sulphide deposit,Bathurst Mining Camp,New Brunswick:Implications for ambient environment,sulphur source,and ore genesis[J].Canadian Journal of Earth Sciences,V.1996,33.P231-251.
[30]Tornos F.,Solomon M.,Conde C.,and Spiro B F.Formation of the Tharsis massive sulfide deposit,Iberian pyrite belt:Geological,Lithogeo-chemical,and stable isotope evidence for deposition in a brine pool[J].Economic Geology,V 2008,103,P185-214.
[31]Ono S.,Shanks W C.,Rouxel O J.,and Rumble D.S-33constraints on the seawater sulfate contribution in modern seafloor hydrothermal vent sulfides[J].Geochimica et Cosmochimica Acta,v.2007,71,P1170-1182.
[32]Farquhar J.,Wu N P.,Donald E.,and Oduro H.Connections Between Sulfur Cycle Evolution,Sulfur Isotopes,Sediments,and Base Metal Sulfide Deposits[M].509-533.
[33]耿新霞,杨健民,姚佛军,等.新疆阿勒泰阿巴宫铁矿遥感找矿综合信息研究[J].地质论评,2010,56(3):365-373.
[34]李学凯.新疆阿勒泰阿巴宫铅锌矿地质特征及成因初探[J].新疆有色金属,2004,(2):2-6.
[35]熊永柱,夏斌,林丽,等.热水沉积成矿研究现状与展望[J].矿产与地质,2005,19(3):235-238.
[36]吴志亮.热水沉积成岩成矿作用—以阿尔泰泥盆纪火山岩沉积盆地为例[M].北京:地质出版社,1996.