内蒙古浩尧尔忽洞金矿区岩体地球化学特征及成矿意义
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摘要
内蒙古浩尧尔忽洞金矿位于华北地台北缘西段中元古代白云鄂博台缘凹陷带西部,矿区内有大面积花岗质岩体和岩脉出露,其岩性主要包括石英二长闪长岩、二长花岗岩和碱长花岗岩。通过岩相学特征和岩石地球化学特征分析,结合区域上同类型岩体的侵入时代,认为浩尧尔忽洞岩体形成于华北板块与西伯利亚板块同碰撞-后碰撞环境。其中二长花岗岩形成于同碰撞环境,该环境下由于板片持续俯冲,引起俯冲板片及地幔楔发生熔融,其上侵带来的热量致使下地壳物质部分熔融而形成该类型岩石的母岩浆;石英二长闪长岩形成于碰撞后隆起环境,是加厚下地壳熔融的产物;碱长花岗岩属于晚造山期A型花岗岩系列,该阶段地幔玄武质岩浆底侵,导致下地壳物质熔融,部分与其发生混染。结合浩尧尔忽洞金矿的成矿年龄、成矿流体特征及赋矿岩石有机地球化学特征,认为岩体的侵位提供了矿床形成必不可少的热量及部分成矿流体来源。
The Haoyaoerhudong gold deposit is located in the west of the Mesoproterozoic Bayan Obo rift on the west section of the northern margin of the North China Platform.A lot of granitoid plutons and dykes appear in the interior and outskirts of the diggings mainly including quartz monzodiorite,monzonitic granite and alkali feldspar granite whose enclaves are named as monzogabbro.By analyzing the characteristics of petrography and petrogeochemistry,combining with the intrusion era of the same type plutons in the same region,the Haoyaoer-hudong pluton was considered to be formed in the syn-collisional and post-collisional environment of North China Plate and Siberia Plate.Among them,the monzonitic granite formed in syn-collisional environment,and is possibly influenced by the heat of melting of the underthrust plate and mantle wedge in the process of subduction,of which the parental magma derived from partial melting of lower crust;the quartz monzodiorite formed in the uplift environment of post-collisional,resulting from the melt of the thickening lower crust;the alkali feldspar granite belongs to the series of A-type granites of the late orogenic era when the mantle basaltic magma underplated leading to the lower crust melting and being mixed.Combing with the mineralization ages,the characteristics of the mineralization fluid and organic geochemistry of host rocks,the invasion of pluton is considered to offer essential heat and part of ore-forming fluid sources.
The Haoyaoerhudong gold deposit is located in the west of the Mesoproterozoic Bayan Obo rift on the west section of the northern margin of the North China Platform.A lot of granitoid plutons and dykes appear in the interior and outskirts of the diggings mainly including quartz monzodiorite,monzonitic granite and alkali feldspar granite whose enclaves are named as monzogabbro.By analyzing the characteristics of petrography and petrogeochemistry,combining with the intrusion era of the same type plutons in the same region,the Haoyaoer-hudong pluton was considered to be formed in the syn-collisional and post-collisional environment of North China Plate and Siberia Plate.Among them,the monzonitic granite formed in syn-collisional environment,and is possibly influenced by the heat of melting of the underthrust plate and mantle wedge in the process of subduction,of which the parental magma derived from partial melting of lower crust;the quartz monzodiorite formed in the uplift environment of post-collisional,resulting from the melt of the thickening lower crust;the alkali feldspar granite belongs to the series of A-type granites of the late orogenic era when the mantle basaltic magma underplated leading to the lower crust melting and being mixed.Combing with the mineralization ages,the characteristics of the mineralization fluid and organic geochemistry of host rocks,the invasion of pluton is considered to offer essential heat and part of ore-forming fluid sources.
引文
①宁夏核工业地质勘查院.内蒙古自治区乌拉特中旗浩尧尔忽洞东矿区金矿详查——内蒙古自治区国土资源厅内部地质勘探报告.2005:8-35.
[1]郭书胜.浩尧尔忽洞金矿床成因控矿因素浅析[J].中国科技博览,2008(16):21-23.
[2]聂凤军,江思宏,侯万荣,等.内蒙古中西部浅变质岩为容矿围岩的金矿床地质特征及形成过程[J].矿床地质,2010,29(1):58-70.
[3]胡鸿飞,戴霜,唐玉虎,等.华北板块北缘西段裂谷系金矿床成矿特征及成因探讨[J].地质与勘探,2008,44(1):9-14.
[4]范宏瑞,胡芳芳,杨奎锋,等.内蒙古白云鄂博地区晚古生代闪长质-花岗质岩石年代学框架及其地质意义[J].岩石学报,2009,25(11):2923-2928.
[5]张晓晖,翟明国.华北北部古生代大陆地壳增生过程中的岩浆作用与成矿效应[J].岩石学报,2010,26(5):1329-1341.
[6]路远发.Geokit:一个用VBA构建的地球化学工具软件包[J].地球化学,2004,33(5):459-464.
[7]Streckeisen A,Le Maitre.A chemical approximation to the mo-dal QAPF classification of the igneous rocks[J].Neues Jahr-buch für Mineralogie Abhandlungen,1979,136(2):169-206.
[8]洪大卫,黄怀曾,肖军宜,等.内蒙古中部二叠纪碱性花岗岩及地球动力学意义[J].地质学报,1994,68(3):219-230.
[9]罗飞,罗照华,李述靖,等.内蒙古中部白垩纪碱性花岗岩的发现及意义[J].现代地质,1995,9(2):203-221.
[10]罗红玲,吴泰然,李毅.乌拉特中旗克布岩体的地球化学特征及SHRIMP定年:早二叠世华北克拉通底侵作用的证据[J].岩石学报,2007,23(4):755-766.
[11]Peccerillo R,Taylor S R.Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area,Northern Turkey[J].Contributions to Mineralogy and Petrology,1976,58:63-81.
[12]Maniar P D,Picooli P M.Tectonic discrimination of granitoids[J].Geological Society of America Bulletin,1989,101(5):635-643.
[13]Whalen J B,Currie K L,Chappell B W.A-type granites:geo-chemical characteristics,discrimination and petrogenesis[J].Contributions to Mineralogy and Petrology,1987,95(4):407-419.
[14]路凤香,桑隆康.岩石学[M].北京:地质出版社,2002:280-283.
[15]刘红涛,翟明国,刘建明,等.华北克拉通北缘中生代花岗岩:从碰撞后到非造山[J].岩石学报,2002,18(4):433-446.
[16]Sun S S,McDonough W F.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and process[M]//Saunders A D,Norry M J.Magmatism in the Ocean Basins.London:Geological Society Special Publication,1989:313-345.
[17]Zartman R E,Doe B R.Plumbotectonics:the model[J].Tectonophysics,1981,75(1/2):135-162.
[18]李大鹏,陈岳龙,王忠,等.内蒙古不同时代花岗岩类Nd、Pb同位素特征及其地质意义[J].现代地质,2010,24(5):821-831.
[19]王荃,刘雪亚,李锦轶.中国华夏与安加拉古陆间的板块构造[M].北京:北京大学出版社,1991:80-87.
[20]Senor A M C,Natalin B A,Burtman V S.Evolution of the Al-taid tectonic collage and Paleozoic crustal growth in Eurasia[J].Nature,1993,364(22):299-307.
[21]陈斌,赵国春,Simon Wilde.内蒙古苏尼特左旗南两类花岗岩同位素年代学及其构造意义[J].地质论评,2001,47(4):361-364.
[22]Zhang X H,Wilde S A,Zhang H F,et al.Geochemistry of hornblende gabbros from Sonidzuoqi,Inner Mongolia,North China:Implication for magmatism during the final stage of supra-subduction zone ophiolite formation[J].International Geology Review,2009,51(4):345-373.
[23]陈衍景,翟明国,蒋少涌.华北大陆边缘造山过程与成矿研究的重要进展和问题[J].岩石学报,2009,25(11):2695-2726.
[24]罗红玲,吴泰然,赵磊.华北板块北缘乌梁斯太A型花岗岩体锆石SHRIMP U-Pb定年及构造意义[J].岩石学报,2009,25(3):515-526.
[25]罗红玲,吴泰然,赵磊.乌拉特中旗二叠纪Ⅰ型花岗岩类地球化学特征及构造意义[J].北京大学学报:自然科学版,2010,46(5):804-820.
[26]Zhang X H,Qian M,Zhang H F,et al.Mafic and felsic mag-ma interaction during the construction of high-K calc-alkaline plu-tons within a metacratonic passive margin:The Early Permian Guyang batholith from the northern North China Craton[J].Lithos,2011,125(1/2):569-591.
[27]Miao L C,Zhang F Q,Fan W M,et al.Phanerozoic evolution of the Inner Mongolia-Daxinganling orogenic belt in North China:Constraints from geochronology of ophiolites and associated forma-tions[M]//Zhai M G,Windley B F,Kusky T M,et al.Mesozoic Sub-Continental Lithospheric Thinning under Eastern Asia.London:Geological Society,2007,280:223-237.
[28]Pearce J A.Trace element discrimination diagrams for the tecton-ic interpretation of granitic rocks[J].Journal of Petroleum Geology,1984,25(4):956-983.
[29]Batchelor R A,Bowden P.Petrogenetic interpretation of grani-toid rock series using multicationic parameters[J].Chemical Geology,1985,48:43-55.
[30]杨富全,王义天,李蒙文,等.新疆天山黑色岩系型矿床的地质特征及找矿方向[J].地质通报,2005,24(5):463-469.
[31]王建平,刘家军,江向东,等.内蒙古浩尧尔忽洞金矿床黑云母氩氩年龄及其地质意义[J].矿物学报,2011,31(增刊下):643-644.
[32]李义明.内蒙古浩尧尔忽洞金矿床成矿流体特征及其地质意义[D].北京:中国地质大学,2011:1-67.
[33]胡受奚,陈衍景,徐金方,等.华北地台花岗岩和地层中金含量与金成矿的关系[J].高校地质学报,1998,4(2):121-126.
[34]徐兵,胡受奚,卢冰,等.胶北金矿的碱交代特征与碱交代成矿模式[J].黄金科学技术,1993,1(2):29-33.
[35]杜乐天.碱交代岩研究的重大成因意义[J].矿床地质,2002,21(增刊):953-958.
[36]李赞.内蒙古浩尧尔忽洞金矿床地球化学特征研究[D].北京:中国地质大学,2011:1-60.
[37]李进文,王存贤,侯万荣,等.内蒙古白乃庙地区金矿成矿作用[J].现代地质,2003,17(3):275-280.
[38]王玉峰,王建平,李义明,等.内蒙古浩尧尔忽洞金矿赋矿地层有机地球化学特征及成矿意义[J].矿物学报,2011,31(增刊上):405-407.
[39]胡明安.有机质的热液成熟作用在云南金顶铅锌矿床形成过程中的意义[J].地球科学:中国地质大学学报,1989,14(5):503-512.
[40]温汉捷.中国若干下寒武统高硒地层的有机地球化学特征及生物标志物研究[J].地球化学,2000,29(1):28-34.
[41]薛伟,薛春纪,Chi Guoxiang,等.鄂尔多斯盆地东北缘侏罗系铀矿化与有机质的某些关联[J].地质论评,2009,55(3):361-369.
[1]郭书胜.浩尧尔忽洞金矿床成因控矿因素浅析[J].中国科技博览,2008(16):21-23.
[2]聂凤军,江思宏,侯万荣,等.内蒙古中西部浅变质岩为容矿围岩的金矿床地质特征及形成过程[J].矿床地质,2010,29(1):58-70.
[3]胡鸿飞,戴霜,唐玉虎,等.华北板块北缘西段裂谷系金矿床成矿特征及成因探讨[J].地质与勘探,2008,44(1):9-14.
[4]范宏瑞,胡芳芳,杨奎锋,等.内蒙古白云鄂博地区晚古生代闪长质-花岗质岩石年代学框架及其地质意义[J].岩石学报,2009,25(11):2923-2928.
[5]张晓晖,翟明国.华北北部古生代大陆地壳增生过程中的岩浆作用与成矿效应[J].岩石学报,2010,26(5):1329-1341.
[6]路远发.Geokit:一个用VBA构建的地球化学工具软件包[J].地球化学,2004,33(5):459-464.
[7]Streckeisen A,Le Maitre.A chemical approximation to the mo-dal QAPF classification of the igneous rocks[J].Neues Jahr-buch für Mineralogie Abhandlungen,1979,136(2):169-206.
[8]洪大卫,黄怀曾,肖军宜,等.内蒙古中部二叠纪碱性花岗岩及地球动力学意义[J].地质学报,1994,68(3):219-230.
[9]罗飞,罗照华,李述靖,等.内蒙古中部白垩纪碱性花岗岩的发现及意义[J].现代地质,1995,9(2):203-221.
[10]罗红玲,吴泰然,李毅.乌拉特中旗克布岩体的地球化学特征及SHRIMP定年:早二叠世华北克拉通底侵作用的证据[J].岩石学报,2007,23(4):755-766.
[11]Peccerillo R,Taylor S R.Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area,Northern Turkey[J].Contributions to Mineralogy and Petrology,1976,58:63-81.
[12]Maniar P D,Picooli P M.Tectonic discrimination of granitoids[J].Geological Society of America Bulletin,1989,101(5):635-643.
[13]Whalen J B,Currie K L,Chappell B W.A-type granites:geo-chemical characteristics,discrimination and petrogenesis[J].Contributions to Mineralogy and Petrology,1987,95(4):407-419.
[14]路凤香,桑隆康.岩石学[M].北京:地质出版社,2002:280-283.
[15]刘红涛,翟明国,刘建明,等.华北克拉通北缘中生代花岗岩:从碰撞后到非造山[J].岩石学报,2002,18(4):433-446.
[16]Sun S S,McDonough W F.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and process[M]//Saunders A D,Norry M J.Magmatism in the Ocean Basins.London:Geological Society Special Publication,1989:313-345.
[17]Zartman R E,Doe B R.Plumbotectonics:the model[J].Tectonophysics,1981,75(1/2):135-162.
[18]李大鹏,陈岳龙,王忠,等.内蒙古不同时代花岗岩类Nd、Pb同位素特征及其地质意义[J].现代地质,2010,24(5):821-831.
[19]王荃,刘雪亚,李锦轶.中国华夏与安加拉古陆间的板块构造[M].北京:北京大学出版社,1991:80-87.
[20]Senor A M C,Natalin B A,Burtman V S.Evolution of the Al-taid tectonic collage and Paleozoic crustal growth in Eurasia[J].Nature,1993,364(22):299-307.
[21]陈斌,赵国春,Simon Wilde.内蒙古苏尼特左旗南两类花岗岩同位素年代学及其构造意义[J].地质论评,2001,47(4):361-364.
[22]Zhang X H,Wilde S A,Zhang H F,et al.Geochemistry of hornblende gabbros from Sonidzuoqi,Inner Mongolia,North China:Implication for magmatism during the final stage of supra-subduction zone ophiolite formation[J].International Geology Review,2009,51(4):345-373.
[23]陈衍景,翟明国,蒋少涌.华北大陆边缘造山过程与成矿研究的重要进展和问题[J].岩石学报,2009,25(11):2695-2726.
[24]罗红玲,吴泰然,赵磊.华北板块北缘乌梁斯太A型花岗岩体锆石SHRIMP U-Pb定年及构造意义[J].岩石学报,2009,25(3):515-526.
[25]罗红玲,吴泰然,赵磊.乌拉特中旗二叠纪Ⅰ型花岗岩类地球化学特征及构造意义[J].北京大学学报:自然科学版,2010,46(5):804-820.
[26]Zhang X H,Qian M,Zhang H F,et al.Mafic and felsic mag-ma interaction during the construction of high-K calc-alkaline plu-tons within a metacratonic passive margin:The Early Permian Guyang batholith from the northern North China Craton[J].Lithos,2011,125(1/2):569-591.
[27]Miao L C,Zhang F Q,Fan W M,et al.Phanerozoic evolution of the Inner Mongolia-Daxinganling orogenic belt in North China:Constraints from geochronology of ophiolites and associated forma-tions[M]//Zhai M G,Windley B F,Kusky T M,et al.Mesozoic Sub-Continental Lithospheric Thinning under Eastern Asia.London:Geological Society,2007,280:223-237.
[28]Pearce J A.Trace element discrimination diagrams for the tecton-ic interpretation of granitic rocks[J].Journal of Petroleum Geology,1984,25(4):956-983.
[29]Batchelor R A,Bowden P.Petrogenetic interpretation of grani-toid rock series using multicationic parameters[J].Chemical Geology,1985,48:43-55.
[30]杨富全,王义天,李蒙文,等.新疆天山黑色岩系型矿床的地质特征及找矿方向[J].地质通报,2005,24(5):463-469.
[31]王建平,刘家军,江向东,等.内蒙古浩尧尔忽洞金矿床黑云母氩氩年龄及其地质意义[J].矿物学报,2011,31(增刊下):643-644.
[32]李义明.内蒙古浩尧尔忽洞金矿床成矿流体特征及其地质意义[D].北京:中国地质大学,2011:1-67.
[33]胡受奚,陈衍景,徐金方,等.华北地台花岗岩和地层中金含量与金成矿的关系[J].高校地质学报,1998,4(2):121-126.
[34]徐兵,胡受奚,卢冰,等.胶北金矿的碱交代特征与碱交代成矿模式[J].黄金科学技术,1993,1(2):29-33.
[35]杜乐天.碱交代岩研究的重大成因意义[J].矿床地质,2002,21(增刊):953-958.
[36]李赞.内蒙古浩尧尔忽洞金矿床地球化学特征研究[D].北京:中国地质大学,2011:1-60.
[37]李进文,王存贤,侯万荣,等.内蒙古白乃庙地区金矿成矿作用[J].现代地质,2003,17(3):275-280.
[38]王玉峰,王建平,李义明,等.内蒙古浩尧尔忽洞金矿赋矿地层有机地球化学特征及成矿意义[J].矿物学报,2011,31(增刊上):405-407.
[39]胡明安.有机质的热液成熟作用在云南金顶铅锌矿床形成过程中的意义[J].地球科学:中国地质大学学报,1989,14(5):503-512.
[40]温汉捷.中国若干下寒武统高硒地层的有机地球化学特征及生物标志物研究[J].地球化学,2000,29(1):28-34.
[41]薛伟,薛春纪,Chi Guoxiang,等.鄂尔多斯盆地东北缘侏罗系铀矿化与有机质的某些关联[J].地质论评,2009,55(3):361-369.