熊耳山上宫金矿床围岩蚀变特征及找矿意义
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摘要
上宫金矿床为一典型的构造蚀变岩型金矿床,围岩蚀变强烈。文章从矿床地质特征、蚀变分带及蚀变岩石的元素含量特征研究入手,并对蚀变过程中常量元素的迁移规律进行了探讨。研究表明,熊耳群及太华群的围岩蚀变横向分带较明显,由矿体中心向外侧依次为含金硫化物—(铁白云石)—绢云母—硅化带(Ⅰ带)→弱绿泥石—绢云母—(钾化)—铁白云石化带(Ⅱ带)→弱铁白云石(弱钾化)—绿泥石化带(Ⅲ带);蚀变岩中常量元素Ca O、K_2O、SiO_2、MgO、MnO等的带入及Na_2O明显带出规律,表明矿化蚀变与铁白云石化、钾长石化、绢云母化、绿泥石化等密切相关。蚀变特征研究为揭示矿化蚀变过程中元素的迁移机制提供了重要线索。
The Shanggong gold deposit is a typical structrual altered rock type gold deposit,the wall rock alteration is intensive in the deposit area. The paper first studied geological characteristics of the deposit,alteration zoning and characteristics of element content in altered rock,and the migration regulation of constant elements in the alteration process was discussed. The study result shows that wall rock transversal zoning is obvious in Xionger and Taihua group as followings: gold-bearing sulfide orebody-( ankerite)-sericite-silicified belt( Belt I) to weak chlorite-sericite-( potassium)-iron dolomitization belt( BeltⅡ) to weak ankerite( weak potassium)-chloritization zone( Belt Ⅲ) from center to outside. In altered rocks the constant components of CaO,K_2 O,SiO_2,MgO and MnO etc. were brought obviously into and Na_2O was obviously brought out,which indicated that the mineralization and alteration are closely related to potassium feldspathization,sericitization,iron dolomitization and chloritization etc... The study of alteration characteristics provides important clues for revealing the mechanism of element migarion in the process of mineralized alteration.
The Shanggong gold deposit is a typical structrual altered rock type gold deposit,the wall rock alteration is intensive in the deposit area. The paper first studied geological characteristics of the deposit,alteration zoning and characteristics of element content in altered rock,and the migration regulation of constant elements in the alteration process was discussed. The study result shows that wall rock transversal zoning is obvious in Xionger and Taihua group as followings: gold-bearing sulfide orebody-( ankerite)-sericite-silicified belt( Belt I) to weak chlorite-sericite-( potassium)-iron dolomitization belt( BeltⅡ) to weak ankerite( weak potassium)-chloritization zone( Belt Ⅲ) from center to outside. In altered rocks the constant components of CaO,K_2 O,SiO_2,MgO and MnO etc. were brought obviously into and Na_2O was obviously brought out,which indicated that the mineralization and alteration are closely related to potassium feldspathization,sericitization,iron dolomitization and chloritization etc... The study of alteration characteristics provides important clues for revealing the mechanism of element migarion in the process of mineralized alteration.
引文
[1]汪江河,孙卫志,刘耀文,冯绍平,赵太平,姚军明,詹晓军.金矿体趋势预测方法及其在河南上宫金成矿带的应用效果[J].矿产勘查,2015,6(6):752-757.
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[3]范宏瑞,谢奕汉,王英兰.豫西上宫构造蚀变岩型金矿成矿过程中的流体—岩石反应[J].岩石学报,1998,14(4):529-541.
[4]付法凯,汪江河,赵春和.河南省洛宁上宫金矿资源潜力浅议[J].西部探矿工程,2007,19(5):89-92.
[5]付思峰.上宫构造蚀变岩型金矿床地质特征及化探找金经验[J].物探与化探,2008,32(3):267-269.
[6]任志媛,李建威.豫西上宫金矿床矿化特征及成矿时代[J].矿床地质,2010,29(增刊):987-988.
[7]于伟.河南上宫金矿深部成矿特征及找矿预测[J].西部探矿工程,2011,23(7):113-137.
[8]范明泰,李红松,杨臣堂,汪江河,管丙娟.河南省上宫金矿F8金矿床地质特征及找矿方向[J].西部探矿工程,2012,24(2):149-152.
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[10]胡新露,姚书振,何谋春,熊索菲,丁振举,宫勇军,谭满堂.河南省上宫金矿成矿热力学条件及成矿机制[J].中南大学学报(自然科学版),2013,44(12):4962-4971.
[11]余燚,蔡换花,汪洋,吴淑琴.河南上宫金矿F1-Ⅰ成矿地质特征及深部找矿前景[J].西部探矿工程,2013,25(5):129-132.
[12]宋凯,郝晓圆,汪江河,赵春和,孔源,牛树银.豫西上宫金矿构造控矿特征及成矿作用探讨[J].黄金科学技术,2013,21(6):30-35.
[13]翟裕生,姚书振,蔡克勤.矿床学[M].北京:地质出版社,2011.
[14]冯绍平,汪江河,刘耀文,等.河南省洛宁上宫金矿区(干树矿段)金矿资源潜力调查报告[R].洛阳:河南省地矿局第一地质矿产调查院,2013.
[15]黎世美,瞿伦全,李先民,等.熊耳山地区蚀变构造岩型金矿成矿地质条件及富集规律研究报告[R].洛阳:河南省地矿厅第一地质调查队,1989.
[16]姚军明,赵太平,李晶,孙亚莉,原振雷,陈伟,韩军.河南祁雨沟金成矿系统辉钼矿Re-Os年龄和锆石U-Pb年龄及Hf同位素地球化学[J].岩石学报,2009,25(2):374-384.
[17]李永峰.豫西熊耳山地区中生代花岗岩类时空演化与钼(金)成矿作用[D].北京:中国地质大学(北京),2005.
[18]李永峰.小秦岭—熊耳山地区金矿大规模成矿作用研究[R].973项目研究报告,2004:1-57.
[19]毛景文,谢桂青,张作衡,李晓峰,王义天,张长青,李永峰.中国北方中生代大规模成矿作用的期次及其地球动力学背景[J].岩石学报,2005,21(1):171-190.
[20]汪江河,孙卫志,于伟,付法凯,燕建设,刘耀文,等.熊耳山北麓中深部金矿成矿规律与找矿方向研究[M].郑州:黄河水利出版社,2015.
[21]Grant J A.The isocon diagram;a simple solution to Gresens’equation for metasomatic alteration[J].Economic Geology.1986,81(8):1976-1982.
[22]Gresens R L.Composition-volume relationships of metasomatism[J].Chemical geology.1967,(2):47-65.
[23]Hynes A.Carbonatization and mobility of Ti,Y,and Zr in Ascot Formation metabasalts,SE Quebec[J].Contributions to Mineralogy and Petrology.1980,75(1):79-87.
[24]O'Hara K.Fluid flow and volume loss during mylonitization:an origin for phyllonite in an overthrust setting,North Carolina USA[J].Tectonophysics.1988,156(1):21-36.
[25]Salvi S,Williams-Jones A E.The role of hydrothermal processes in concentrating high-field strength elements in the Strange Lake peralkaline complex,northeastern Canada[J].Geochimica et Cosmochimica Acta.1996,60(11):1917-1932.
[26]Karakaya MC,Karakaya N,Küpeli爦,et al.Mineralogy and geochemical behavior of trace elements of hydrothermal alteration types in the volcanogenic massive sulfide deposits,NE Turkey[J].Ore Geology Reviews.2012,(48):197-224.
[27]郭顺,叶凯,陈意,刘景波,张灵敏.开放地质体系中物质迁移质量平衡计算方法介绍[J].岩石学报,2013,29(5):1486-1498.
[28]魏俊浩,刘丛强,张德会,王思源,刘伟.蚀变岩岩石质量平衡及主要成分变异序列——以河南西峡石板沟金矿热液蚀变岩为例[J].地球化学,1999,28(5):479-486.
[29]龚庆杰,周连壮,胡杨,闫磊,张翰奇,贾玉杰.胶东玲珑金矿田煌斑岩蚀变过程元素迁移行为及其意义[J].现代地质,2012,26(5):1065-1077.
[30]魏俊浩,刘丛强,丁振举.热液型金矿床围岩蚀变过程中元素迁移规律——以张家口地区东坪、后沟、水晶屯金矿为例[J].矿物学报,2000,20(2):200-206.
[2]陈衍景,李晶,Franco Pirajno,林治家,王海华.东秦岭上宫金矿流体成矿作用:矿床地质和包裹体研究[J].矿物岩石,2004,24(3):1-12.
[3]范宏瑞,谢奕汉,王英兰.豫西上宫构造蚀变岩型金矿成矿过程中的流体—岩石反应[J].岩石学报,1998,14(4):529-541.
[4]付法凯,汪江河,赵春和.河南省洛宁上宫金矿资源潜力浅议[J].西部探矿工程,2007,19(5):89-92.
[5]付思峰.上宫构造蚀变岩型金矿床地质特征及化探找金经验[J].物探与化探,2008,32(3):267-269.
[6]任志媛,李建威.豫西上宫金矿床矿化特征及成矿时代[J].矿床地质,2010,29(增刊):987-988.
[7]于伟.河南上宫金矿深部成矿特征及找矿预测[J].西部探矿工程,2011,23(7):113-137.
[8]范明泰,李红松,杨臣堂,汪江河,管丙娟.河南省上宫金矿F8金矿床地质特征及找矿方向[J].西部探矿工程,2012,24(2):149-152.
[9]胡新露,何谋春,姚书振.东秦岭上宫金矿成矿流体与成矿物质来源新认识[J].地质学报,2013,87(1):91-100.
[10]胡新露,姚书振,何谋春,熊索菲,丁振举,宫勇军,谭满堂.河南省上宫金矿成矿热力学条件及成矿机制[J].中南大学学报(自然科学版),2013,44(12):4962-4971.
[11]余燚,蔡换花,汪洋,吴淑琴.河南上宫金矿F1-Ⅰ成矿地质特征及深部找矿前景[J].西部探矿工程,2013,25(5):129-132.
[12]宋凯,郝晓圆,汪江河,赵春和,孔源,牛树银.豫西上宫金矿构造控矿特征及成矿作用探讨[J].黄金科学技术,2013,21(6):30-35.
[13]翟裕生,姚书振,蔡克勤.矿床学[M].北京:地质出版社,2011.
[14]冯绍平,汪江河,刘耀文,等.河南省洛宁上宫金矿区(干树矿段)金矿资源潜力调查报告[R].洛阳:河南省地矿局第一地质矿产调查院,2013.
[15]黎世美,瞿伦全,李先民,等.熊耳山地区蚀变构造岩型金矿成矿地质条件及富集规律研究报告[R].洛阳:河南省地矿厅第一地质调查队,1989.
[16]姚军明,赵太平,李晶,孙亚莉,原振雷,陈伟,韩军.河南祁雨沟金成矿系统辉钼矿Re-Os年龄和锆石U-Pb年龄及Hf同位素地球化学[J].岩石学报,2009,25(2):374-384.
[17]李永峰.豫西熊耳山地区中生代花岗岩类时空演化与钼(金)成矿作用[D].北京:中国地质大学(北京),2005.
[18]李永峰.小秦岭—熊耳山地区金矿大规模成矿作用研究[R].973项目研究报告,2004:1-57.
[19]毛景文,谢桂青,张作衡,李晓峰,王义天,张长青,李永峰.中国北方中生代大规模成矿作用的期次及其地球动力学背景[J].岩石学报,2005,21(1):171-190.
[20]汪江河,孙卫志,于伟,付法凯,燕建设,刘耀文,等.熊耳山北麓中深部金矿成矿规律与找矿方向研究[M].郑州:黄河水利出版社,2015.
[21]Grant J A.The isocon diagram;a simple solution to Gresens’equation for metasomatic alteration[J].Economic Geology.1986,81(8):1976-1982.
[22]Gresens R L.Composition-volume relationships of metasomatism[J].Chemical geology.1967,(2):47-65.
[23]Hynes A.Carbonatization and mobility of Ti,Y,and Zr in Ascot Formation metabasalts,SE Quebec[J].Contributions to Mineralogy and Petrology.1980,75(1):79-87.
[24]O'Hara K.Fluid flow and volume loss during mylonitization:an origin for phyllonite in an overthrust setting,North Carolina USA[J].Tectonophysics.1988,156(1):21-36.
[25]Salvi S,Williams-Jones A E.The role of hydrothermal processes in concentrating high-field strength elements in the Strange Lake peralkaline complex,northeastern Canada[J].Geochimica et Cosmochimica Acta.1996,60(11):1917-1932.
[26]Karakaya MC,Karakaya N,Küpeli爦,et al.Mineralogy and geochemical behavior of trace elements of hydrothermal alteration types in the volcanogenic massive sulfide deposits,NE Turkey[J].Ore Geology Reviews.2012,(48):197-224.
[27]郭顺,叶凯,陈意,刘景波,张灵敏.开放地质体系中物质迁移质量平衡计算方法介绍[J].岩石学报,2013,29(5):1486-1498.
[28]魏俊浩,刘丛强,张德会,王思源,刘伟.蚀变岩岩石质量平衡及主要成分变异序列——以河南西峡石板沟金矿热液蚀变岩为例[J].地球化学,1999,28(5):479-486.
[29]龚庆杰,周连壮,胡杨,闫磊,张翰奇,贾玉杰.胶东玲珑金矿田煌斑岩蚀变过程元素迁移行为及其意义[J].现代地质,2012,26(5):1065-1077.
[30]魏俊浩,刘丛强,丁振举.热液型金矿床围岩蚀变过程中元素迁移规律——以张家口地区东坪、后沟、水晶屯金矿为例[J].矿物学报,2000,20(2):200-206.