河南洛宁龙门店银矿成矿阶段划分及流体包裹体测温意义
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摘要
河南龙门店银矿位于熊耳山西段的变质核杂岩区和金银成矿聚集区,成矿地质条件好。工业矿体受NE-NNE向断裂控制,含矿断裂带两侧具有硅化→绢英岩化(铬云母化)→钾化对称蚀变分带现象。赋矿围岩主要为新太古界太华群变质岩。矿石类型包括石英脉型和蚀变岩型。原生包裹体约占85%,次生包裹体约占15%。原生包裹体中,纯液相包裹体约占总数的70%,以直径2~6μm居多;气液两相包裹体约占28%,多为4~10μm,最大可达15μm,气相比大多介于2%~22%之间;含子矿物的三相流体包裹体约占总数的2%,直径多在5~10μm之间,气液比2%~10%。矿床可划分为石英-黄铁矿阶段(I)、石英-含金硫化物阶段(II)、石英-银铅多金属硫化物阶段(III)和碳酸盐化阶段(IV)四个成矿阶段,各阶段对应的均一成矿温度分别为252~385℃、145~343℃、104~201℃和81~125℃,对应的平均盐度(wt%Na Cl.eqv)依次为5.38、17.17、31.35和14.48,属中高盐度低温热液型银铅矿。银主要形成于温度较低的第III成矿阶段。结合区域情况在矿床深部有找到中高温热液型铜金矿床的可能。
The Longmendian silver deposit with good geological conditions of mineralization is located in the western part of the metamorphic core complex zone in the Xiong'ershan,which is a gold and silver mineralization belt. In this area,industrial ore veins are mainly controlled by NE- NNE trending faults. On either side of the ore- bearing faults,there is an alteration zoning phenomenon from silicification→ beresitization( chrome mica) → potassium. The host rock is mainly metamorphic rocks of Archean Taihua Group. The ore types include quartz vein and altered rock types. The primary inclusions account for about 85%,and secondary inclusions for about 15% of the total. In the primary inclusions,the pure liquid phase is about 70% of the total,with a diameter of 2 ~ 6μm; Gas liquid two- phase inclusions are about 28%,most of which are between 4 ~ 10μm in diameter with the maximum up to 15μm. Gas phase ratios are mostly between 2% ~ 22%. Three- phase fluid inclusions with sub- bearing minerals account for about 2% of the total with diameters more than 5 ~ 10 m,and the gas to liquid ratios are 2% ~ 10%. Mineralization can be divided into four stages according to the mineral interspersed combination: Quartz- pyrite stage( I),quartz- gold sulfide stage( II),quartz- Ag Pb polymetallic sulfide stage( III) and carbonate development stage( IV). Their ore- forming temperatures are 252 ~ 385℃; 145 ~ 343℃; 104 ~ 201℃ and 81 ~ 125℃,respectively. The average salinity values( wt% Na Cl. eqv) are 5. 38,17. 17,31. 35 and 14. 48,respectively. The type of ore deposit is of the middle- high salinity and low temperature hydrothermal Ag- Pb deposit. Silver is mainly formed in the III mineralization stage with lower temperatures. Combined with the situation in the region,it is possible to find middle- high temperature hydrothermal copper- gold deposits at depth in this area.
The Longmendian silver deposit with good geological conditions of mineralization is located in the western part of the metamorphic core complex zone in the Xiong'ershan,which is a gold and silver mineralization belt. In this area,industrial ore veins are mainly controlled by NE- NNE trending faults. On either side of the ore- bearing faults,there is an alteration zoning phenomenon from silicification→ beresitization( chrome mica) → potassium. The host rock is mainly metamorphic rocks of Archean Taihua Group. The ore types include quartz vein and altered rock types. The primary inclusions account for about 85%,and secondary inclusions for about 15% of the total. In the primary inclusions,the pure liquid phase is about 70% of the total,with a diameter of 2 ~ 6μm; Gas liquid two- phase inclusions are about 28%,most of which are between 4 ~ 10μm in diameter with the maximum up to 15μm. Gas phase ratios are mostly between 2% ~ 22%. Three- phase fluid inclusions with sub- bearing minerals account for about 2% of the total with diameters more than 5 ~ 10 m,and the gas to liquid ratios are 2% ~ 10%. Mineralization can be divided into four stages according to the mineral interspersed combination: Quartz- pyrite stage( I),quartz- gold sulfide stage( II),quartz- Ag Pb polymetallic sulfide stage( III) and carbonate development stage( IV). Their ore- forming temperatures are 252 ~ 385℃; 145 ~ 343℃; 104 ~ 201℃ and 81 ~ 125℃,respectively. The average salinity values( wt% Na Cl. eqv) are 5. 38,17. 17,31. 35 and 14. 48,respectively. The type of ore deposit is of the middle- high salinity and low temperature hydrothermal Ag- Pb deposit. Silver is mainly formed in the III mineralization stage with lower temperatures. Combined with the situation in the region,it is possible to find middle- high temperature hydrothermal copper- gold deposits at depth in this area.
引文
Chen Yan-jing,Li Jing,Pirajno Franco,Lin Zhi-jia,Wang Hai-hua.2004.Hydrothermal metallogeny of the Shanggong gold deposit,East Qinling:Studies on ore geology and fluid inclusion geochemistry[J].Mineral Petrol,24(03):1-12(in Chinese with English abstract)
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Li Yi-ming,Wang Jian-ping,Peng Run-min,Li Zan,Jiang Xiang-dong,Zhang Yan-min.2013.Fluid inclusions of the Haoyaoerhudong gold deposit,Inner Mongolia[J].Geology and Exploration,49(05):920-927(in Chinese with English abstract)
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Liang Tao,Lu Ren,Bai Feng-jun,Zhang Xiao-yong,Chen Li-juan,Cheng Jing-liang,Wang Ming-guo.2012.Spatial distribution features of Ag,Ag-Pb,Au,Mo and Pb deposits(mineralization spots)in Xiong'er Mountain,western Henan Province,and their implicatiotion for prospecting[J].Mineral Deposits,31(03):590-600(in Chinese with English abstract)
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Mao Jing-wen,Zheng Rong-fen,Ye Hui-shou,Gao Jian-jing,Chen Wen.2006.40Ar/39Ar dating of fuchsite and sericite from altered rocks close to ore veins in Shagou large-size Ag-Pb-Zn deposit of Xiong'ershan area,Western Henan Province,and its significance[J].Mineral Deposits,25(04):359-368(in Chinese with English abstract)
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Zhang Ming-Liang,Liang Hai-bin,Xuan Shen-ying.2008.Gold and polymetallic perspective analysis of Xiong’ershan area in Henan Province[J].Mineral Deposits,27(S1):177-181(in Chinese with English abstract)
Zhao Ding-sheng.2011.Research on the geological characteristics and mineralization regularity of Longmendian silver mine,Henan Province[J].Gold Since and Technology,19(06):18-21(in Chinese with English abstract)
Zhao Shao-pan,Pang Xu-cheng,Guo Yue-shan,Zhang Kai-tao.2015.Analysis of fractal characteristics at Longmendian silver mine in Henan Province[J].Gold Since and Technology,23(03):12-18(in Chinese with English abstract)
Zhou Yun,Duan Qi-fa,Tang Jü-xing,Cao Liang,Li Fang,Huang Hui-lan,Gan Jin-mu.2014.The large-scale low-temperature mineralization of lead-zinc deposits in western Hunan:Evidence from fluid inclusions[J].Geology and Exploration,50(03):515-532(in Chinese with English abstract)
陈衍景,李晶,Franco Pirajno,林治家,王海华.2004.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,24(03):1-12
高建京.2007.豫西沙沟脉状Ag-Pb-Zn矿床地质特征和成矿流体研究[D].中国地质大学(北京):98
郭保健,徐孟罗,王志光,戴塔根.1997.熊耳山北坡拆离断层带地球化学特征及其与金银矿化的关系[J].矿产与地质,11(01):21-26
李诺,赖勇,鲁颖淮,郭东升.2008.河南祁雨沟金矿流体包裹体及矿床成因类型研究[J].中国地质,35(06):1230-1239
李义明,王建平,彭润民,李赞,江向东,张雁敏.2013.内蒙古浩尧尔忽洞金矿床流体包裹体特征[J].地质与勘探,49(05):920-927
李永峰.2005.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):143
梁涛,卢仁,白凤军,张晓永,陈丽娟,成静亮,王明国.2012.豫西熊耳山Ag、Ag-Pb、Au、Mo及Pb矿床(点)的空间分布特征及找矿启示[J].矿床地质,31(03):590-600
卢焕章,范宏瑞,倪培,欧光习,沈昆,张文淮.2004.流体包裹体[M].北京:科学出版社:1-487
毛景文,谢桂青,张作衡,李晓峰,王义天,张长青,李永峰.2005.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,21(1):169-188
毛景文,郑榕芬,叶会寿,高建京,陈文.2006.豫西熊耳山地区沙沟银铅锌矿床成矿的40Ar-39Ar年龄及其地质意义[J].矿床地质,25(04):359-368
隋颖慧,王海华,高秀丽,陈华勇,李震.2000.河南铁炉坪银矿成矿流体研究及其对碰撞造山成岩成矿与流体作用模式例证[J].中国科学(D辑:地球科学),30(S1):82-90
张明亮,梁海彬,轩慎英.2008.河南省熊耳山地区金及多金属矿远景分析[J].矿床地质,27(S1):177-181
赵定生.2011.河南龙门店银矿地质特征及成矿规律研究[J].黄金科学技术,19(06):18-21
赵少攀,庞绪成,郭跃闪,张凯涛.2015.河南龙门店银矿断裂构造分形特征分析[J].黄金科学技术,23(03):12-18
周云,段其发,唐菊兴,曹亮,李芳,黄惠兰,甘金木.2014.湘西地区铅锌矿的大范围低温流体成矿作用-流体包裹体研究[J].地质与勘探,50(03):515-532
Gao Jian-jing.2007.Geology and ore-forming fluid of silver-lead-zinc lode deposit of Shagou,Western Henan Province[D].Beijing:China University of Geosciences:98(in Chinese with English abstract)
Guo Bao-jian,Xu Meng-luo,Wang Zhi-guang,Dai Ta-gen.1997.Geochemical features along detachment fault zone and its relationship with Au-Ag mineralization in north hillside of the Xiong'er Mountain[J].Mineral Resources and Geology,11(01):21-26(in Chinese with English abstract)
Li Nuo,Lai Yong,Lu Ying-huai,Guo Dong-sheng.2008.Study of fluid inclusions and ore genetic type of the Qiyugou gold deposit,Henan[J].Geology in China,35(06):1230-1239(in Chinese with English abstract)
Li Yi-ming,Wang Jian-ping,Peng Run-min,Li Zan,Jiang Xiang-dong,Zhang Yan-min.2013.Fluid inclusions of the Haoyaoerhudong gold deposit,Inner Mongolia[J].Geology and Exploration,49(05):920-927(in Chinese with English abstract)
Li Yong-feng.2005.The temporal-spital evolution of Mesozoid Granitoids in the Xiong’ershan area and their relationships to molybdenum-gold mineralization[D].Beijing:China University of Geosciences:143(in Chinese with English abstract)
Liang Tao,Lu Ren,Bai Feng-jun,Zhang Xiao-yong,Chen Li-juan,Cheng Jing-liang,Wang Ming-guo.2012.Spatial distribution features of Ag,Ag-Pb,Au,Mo and Pb deposits(mineralization spots)in Xiong'er Mountain,western Henan Province,and their implicatiotion for prospecting[J].Mineral Deposits,31(03):590-600(in Chinese with English abstract)
Lu Huan-zhang,Fan Hong-rui,Ni Pei,Ou Guang-xi,Shen Kun,Zhang Wen-huai.2004.Fluid Inclusions[M].Beijing:Science Press:1-487(in Chinese with English abstract)
ao Jing-wen,Xie Gui-qing,Zhang Zhi-heng,Li Xiao-feng,Zhang Changqing,Li Yong-feng.2005.Mesozoic large-scale metallogenic pulses in North China and corresponding geodynamic settings[J].Acta Petrologica Sinica,21(1):169-188(in Chinese with English abstract)
Mao Jing-wen,Zheng Rong-fen,Ye Hui-shou,Gao Jian-jing,Chen Wen.2006.40Ar/39Ar dating of fuchsite and sericite from altered rocks close to ore veins in Shagou large-size Ag-Pb-Zn deposit of Xiong'ershan area,Western Henan Province,and its significance[J].Mineral Deposits,25(04):359-368(in Chinese with English abstract)
Sui Ying-hui,Wang Hai-hua,Gao Xiu-li,Li Zhen.2000.Ore-forming fluid of CPMF and fluid model example of Henan Tieluping silver deposit[J].Science In China(Series D),30(S1):82-90(in Chinese with English abstract)
Zhang Ming-Liang,Liang Hai-bin,Xuan Shen-ying.2008.Gold and polymetallic perspective analysis of Xiong’ershan area in Henan Province[J].Mineral Deposits,27(S1):177-181(in Chinese with English abstract)
Zhao Ding-sheng.2011.Research on the geological characteristics and mineralization regularity of Longmendian silver mine,Henan Province[J].Gold Since and Technology,19(06):18-21(in Chinese with English abstract)
Zhao Shao-pan,Pang Xu-cheng,Guo Yue-shan,Zhang Kai-tao.2015.Analysis of fractal characteristics at Longmendian silver mine in Henan Province[J].Gold Since and Technology,23(03):12-18(in Chinese with English abstract)
Zhou Yun,Duan Qi-fa,Tang Jü-xing,Cao Liang,Li Fang,Huang Hui-lan,Gan Jin-mu.2014.The large-scale low-temperature mineralization of lead-zinc deposits in western Hunan:Evidence from fluid inclusions[J].Geology and Exploration,50(03):515-532(in Chinese with English abstract)
陈衍景,李晶,Franco Pirajno,林治家,王海华.2004.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,24(03):1-12
高建京.2007.豫西沙沟脉状Ag-Pb-Zn矿床地质特征和成矿流体研究[D].中国地质大学(北京):98
郭保健,徐孟罗,王志光,戴塔根.1997.熊耳山北坡拆离断层带地球化学特征及其与金银矿化的关系[J].矿产与地质,11(01):21-26
李诺,赖勇,鲁颖淮,郭东升.2008.河南祁雨沟金矿流体包裹体及矿床成因类型研究[J].中国地质,35(06):1230-1239
李义明,王建平,彭润民,李赞,江向东,张雁敏.2013.内蒙古浩尧尔忽洞金矿床流体包裹体特征[J].地质与勘探,49(05):920-927
李永峰.2005.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):143
梁涛,卢仁,白凤军,张晓永,陈丽娟,成静亮,王明国.2012.豫西熊耳山Ag、Ag-Pb、Au、Mo及Pb矿床(点)的空间分布特征及找矿启示[J].矿床地质,31(03):590-600
卢焕章,范宏瑞,倪培,欧光习,沈昆,张文淮.2004.流体包裹体[M].北京:科学出版社:1-487
毛景文,谢桂青,张作衡,李晓峰,王义天,张长青,李永峰.2005.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,21(1):169-188
毛景文,郑榕芬,叶会寿,高建京,陈文.2006.豫西熊耳山地区沙沟银铅锌矿床成矿的40Ar-39Ar年龄及其地质意义[J].矿床地质,25(04):359-368
隋颖慧,王海华,高秀丽,陈华勇,李震.2000.河南铁炉坪银矿成矿流体研究及其对碰撞造山成岩成矿与流体作用模式例证[J].中国科学(D辑:地球科学),30(S1):82-90
张明亮,梁海彬,轩慎英.2008.河南省熊耳山地区金及多金属矿远景分析[J].矿床地质,27(S1):177-181
赵定生.2011.河南龙门店银矿地质特征及成矿规律研究[J].黄金科学技术,19(06):18-21
赵少攀,庞绪成,郭跃闪,张凯涛.2015.河南龙门店银矿断裂构造分形特征分析[J].黄金科学技术,23(03):12-18
周云,段其发,唐菊兴,曹亮,李芳,黄惠兰,甘金木.2014.湘西地区铅锌矿的大范围低温流体成矿作用-流体包裹体研究[J].地质与勘探,50(03):515-532