辽西二道沟金矿成矿物质来源:来自S-Pb同位素的证据
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摘要
辽西二道沟金矿位于华北克拉通北缘中段,矿化类型为石英脉型,矿脉产状受断裂严格控制。对该矿床的典型矿脉进行了详细的硫、铅同位素研究,探讨了该矿床的成矿物质来源。分析表明:二道沟金矿成矿热液的总硫同位素组成接近地幔硫的值(δ34S≈0‰),反映了成矿热液的硫主要来自深部岩浆;铅同位素206Pb/204Pb、207Pb/204Pb和208Pb/204Pb分别变化在17. 047～17. 292、15. 319～15. 555和36. 991～37. 855之间,得出矿石铅主要来源为地幔,且有下地壳铅的混入;二道沟金矿矿石的硫、铅同位素特征与西对面沟岩体的硫、铅同位素组成特征基本一致,说明成矿物质的来源与西对面沟岩体(或这次岩浆作用)有密切联系。这些证据都证明了二道沟金矿成矿物质来源于深源岩浆。
The Erdaogou gold deposit in West Liaoning Province is located in the middle segment of north margin of North China Craton. The mineralization type is quartz vein type,and the occurrence of ore vein is controlled by fault. In this paper we study S and Pb isotopes in detail on the typical quartz vein to discuss the oreforming material source. The δ34 S values of the total S isotope for the ore-forming hydrothermal fluids are quite similar to those of the mantle,suggesting that the sulfur of the ore-forming hydrothermal solution was derived from hypomagma. The206 Pb/204 Pb,207 Pb/204 Pb and208 Pb/204 Pb values of ores range from 17. 047 to 17. 292,15. 319 to 15. 555 and 36. 991 to 37. 855,respectively,suggesting that the ore lead was from mantle and lower crust. The S and Pb isotope values are similar to those of the rocks of Xiduimiangou,so we deduce that thesources of ore-forming material are strongly associated with the Xiduimiangou rock( or this magmatism). All the evidences support that metallogenic materials were derived from hypomagma.
The Erdaogou gold deposit in West Liaoning Province is located in the middle segment of north margin of North China Craton. The mineralization type is quartz vein type,and the occurrence of ore vein is controlled by fault. In this paper we study S and Pb isotopes in detail on the typical quartz vein to discuss the oreforming material source. The δ34 S values of the total S isotope for the ore-forming hydrothermal fluids are quite similar to those of the mantle,suggesting that the sulfur of the ore-forming hydrothermal solution was derived from hypomagma. The206 Pb/204 Pb,207 Pb/204 Pb and208 Pb/204 Pb values of ores range from 17. 047 to 17. 292,15. 319 to 15. 555 and 36. 991 to 37. 855,respectively,suggesting that the ore lead was from mantle and lower crust. The S and Pb isotope values are similar to those of the rocks of Xiduimiangou,so we deduce that thesources of ore-forming material are strongly associated with the Xiduimiangou rock( or this magmatism). All the evidences support that metallogenic materials were derived from hypomagma.
引文
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[8]王鹏,董国臣,李志国,等.辽西北票二道沟金矿的成矿特点和黄铁矿热电性特征[J].现代地质,2013,27(2):314-323.
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[12]苗来成,范蔚茗,翟明国,等.金厂沟梁—二道沟金矿田内花岗岩类侵入体锆石的离子探针U-Pb年代学及意义[J].岩石学报,2003,19(1):71-80.
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[14]田晓娟,孟宪刚,陈洪新,等.中生代火山岩地区作为岩浆通道的断裂含金性——以辽西北票二道沟鸡冠山断裂为例[J].地质力学学报,1998,4(3):84-90.
[15]王鹏,董国臣,许卫东,等.辽西北票二道沟金矿的矿化特点及其意义[J].地质与勘探,2013,49(3):429-436.
[16]周雄,温春齐,张学全,等.西藏邦铺钼铜多金属矿床硫、铅同位素地球化学特征[J].地质与勘探,2012,48(1):24-30.
[17]张斌,杨涛,杨生飞,等.东昆仑哈日扎铅锌多金属矿床金属矿物与S-Pb同位素特征[J].现代地质,2018,32(4):646-654.
[18]曲凯,董国臣,李胜荣,等.太行山木吉村斑岩铜(钼)矿床岩石地球化学、Sr-Nd-Pb同位素特征及其地质意义[J].现代地质,2014,28(3):449-460.
[19]侯万荣.内蒙古哈达门沟金矿床与金厂沟梁金矿床对比研究[D].北京:中国地质科学院,2011:1-138.
[20]朱炳泉.地球科学中同位素体系理论与应用——兼论中国大陆壳幔演化[M].北京:科学出版社,1998:1-256.
[21]张理刚.稳定同位素在地质科学中的应用——金属活化热液成矿作用及找矿[M].西安:陕西科技出版社,1985:1-98.
[22] OHOMOTO H. Systematics of sulfur and carbon isotopes in hydrothermal ore deposits[J]. Economic Geology,1972,67:551-578.
[23] STACEY J S,KRAMERS J D. Approximation of terrestrial lead isotope evolution by a two stage model[J]. Earth and Planetary Science Letters,1975,26(2):207-221.
[24] NIE F J,JIANG S H,LIU Y. Intrusion-related gold deposits of North China Craton,People's Republic of China[J]. Resource Geology,2004,54(3):299-324.
[25]陈衍景,郭光军,李欣.华北克拉通花岗绿岩地体中中生代金矿床的成矿地球动力学背景[J].中国科学:D辑,1998,28(1):35-40.
[26]徐学义.二道沟金矿区火山岩的特征及金矿床成因的探讨[D].北京:中国地质科学院,1991:1-138.
[2]朴寿成,李续俊,师磊,等.赤峰—朝阳金矿化集中区元素分带特征及其应用[J].地质与勘探,2006,42(1):17-20.
[3] LIN B Q,SHANG L,SHEN E S,et al. Vein gold deposits of the Liaoxi uplift,North China Platform[M]//MAURICE Y T. IAGOD Quadrennial Symposium. Ottowa:E. Schweizerbart'sche Verlagsbuchhandlung,Science Publishers,1993:597-612.
[4]王志,徐忠勋,杨福和.辽宁省二道沟金矿地质及成因[J].长春地质学院学报,1989,19(3):287-297.
[5]刘宗秀,魏存弟,赵春光,等.金厂沟梁—二道沟金矿田地质地球化学特征及成因探讨[J].世界地质,2002,21(1):13-18.
[6]徐万臣,赵秀英,邢玉屏.二道沟金矿床中黄铁矿的标型特征[J].辽宁地质,1991(4):314-321.
[7]徐万臣.辽宁北票二道沟金矿床地球化学特征及其意义[J].地质与资源,2007,16(4):263-269.
[8]王鹏,董国臣,李志国,等.辽西北票二道沟金矿的成矿特点和黄铁矿热电性特征[J].现代地质,2013,27(2):314-323.
[9]庞奖励.对辽宁二道沟金矿成矿机制的讨论——稀土元素地球化学证据[J].长春地质学院学报,1997,27(1):44-50.
[10]庞奖励.辽宁二道沟金矿床稳定同位素地球化学研究[J].陕西师范大学学报(自然科学版),1998,26(2):81-85.
[11]马光,刘继顺,张洪培.再论北票二道沟金矿成矿物质来源[J].黄金,2004,25(10):11-15.
[12]苗来成,范蔚茗,翟明国,等.金厂沟梁—二道沟金矿田内花岗岩类侵入体锆石的离子探针U-Pb年代学及意义[J].岩石学报,2003,19(1):71-80.
[13]王建平,刘永山,董法先.内蒙古金厂沟梁金矿构造控矿分析[M].北京:地震出版社,1992:1-356.
[14]田晓娟,孟宪刚,陈洪新,等.中生代火山岩地区作为岩浆通道的断裂含金性——以辽西北票二道沟鸡冠山断裂为例[J].地质力学学报,1998,4(3):84-90.
[15]王鹏,董国臣,许卫东,等.辽西北票二道沟金矿的矿化特点及其意义[J].地质与勘探,2013,49(3):429-436.
[16]周雄,温春齐,张学全,等.西藏邦铺钼铜多金属矿床硫、铅同位素地球化学特征[J].地质与勘探,2012,48(1):24-30.
[17]张斌,杨涛,杨生飞,等.东昆仑哈日扎铅锌多金属矿床金属矿物与S-Pb同位素特征[J].现代地质,2018,32(4):646-654.
[18]曲凯,董国臣,李胜荣,等.太行山木吉村斑岩铜(钼)矿床岩石地球化学、Sr-Nd-Pb同位素特征及其地质意义[J].现代地质,2014,28(3):449-460.
[19]侯万荣.内蒙古哈达门沟金矿床与金厂沟梁金矿床对比研究[D].北京:中国地质科学院,2011:1-138.
[20]朱炳泉.地球科学中同位素体系理论与应用——兼论中国大陆壳幔演化[M].北京:科学出版社,1998:1-256.
[21]张理刚.稳定同位素在地质科学中的应用——金属活化热液成矿作用及找矿[M].西安:陕西科技出版社,1985:1-98.
[22] OHOMOTO H. Systematics of sulfur and carbon isotopes in hydrothermal ore deposits[J]. Economic Geology,1972,67:551-578.
[23] STACEY J S,KRAMERS J D. Approximation of terrestrial lead isotope evolution by a two stage model[J]. Earth and Planetary Science Letters,1975,26(2):207-221.
[24] NIE F J,JIANG S H,LIU Y. Intrusion-related gold deposits of North China Craton,People's Republic of China[J]. Resource Geology,2004,54(3):299-324.
[25]陈衍景,郭光军,李欣.华北克拉通花岗绿岩地体中中生代金矿床的成矿地球动力学背景[J].中国科学:D辑,1998,28(1):35-40.
[26]徐学义.二道沟金矿区火山岩的特征及金矿床成因的探讨[D].北京:中国地质科学院,1991:1-138.