河南洛宁县龙门店银矿区断裂构造分期及含矿性评价
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摘要
熊耳山是中国重要的金、银、钼矿产区之一,区域工业矿体大都为构造控矿。本研究以龙门店银矿为例,基于安德森模式,利用StereoNett软件对K1和K6矿体的节理产状进行统计分析,结合区域地质演化史,将研究区断裂构造划分为4期。Ⅰ期近南—北向压应力形成的北东和北西向成矿前构造,并衍生北北东向断裂;Ⅱ期近南—北向引张环境形成的同成矿构造,使Ⅰ期形成的次级北东—北北东向断裂部分被石英脉充填,并伴随热液的沉淀和富集形成工业矿体,另外一些北东—北北东向和北西向断裂发生矿化;Ⅲ期北东—北东东向压应力作用形成的成矿后构造——局部发育北北东向断裂,切割前期形成的北东向断裂;Ⅳ期北西西向压应力作用形成的成矿后构造——北西向左行走滑断裂。分析认为,第Ⅰ期形成的北北东向断裂具有较好的含矿性,在后期找矿工作中应重点关注。
The Xiong'ershan is one of the most important gold,silver and molybdenum producing areas in China,and most of the regional industrial orebodies are controlled by the faults.This study takes the Longmendian silver deposit as an example,the occurrences of K1 and K6 ore bodies are statistically analyzed by StereoNett software based on the Anderson model.Combined with the history of regional geological evolution,the fault structure in this study area has been divided into four stages:Stage I is NE and NW faults formed by near S-N compressive stress,and NNE-derived fractures;Stage II is metasynthetic structures formed near the S-N extensional environment,the secondary NE-NNE formed in the first stage filled with quartz veins to the faults,and it is accompanied by the precipitation and enrichment of hydrothermal fluids to form industrial ore bodies,and some NE-NNE and NW fractures are mineralized;Stage III in NE-NEE postmineral structure formed by compressive stress,partially developed NNE and cut pre-NE fracture;Stage IV is post-mineral structure formed by NWW compressive stress-NW left-sliding slide fault.It is concluded that the NNE fault formed in the stage I has good ore-bearing property,which is of guiding significance for later prospecting.
The Xiong'ershan is one of the most important gold,silver and molybdenum producing areas in China,and most of the regional industrial orebodies are controlled by the faults.This study takes the Longmendian silver deposit as an example,the occurrences of K1 and K6 ore bodies are statistically analyzed by StereoNett software based on the Anderson model.Combined with the history of regional geological evolution,the fault structure in this study area has been divided into four stages:Stage I is NE and NW faults formed by near S-N compressive stress,and NNE-derived fractures;Stage II is metasynthetic structures formed near the S-N extensional environment,the secondary NE-NNE formed in the first stage filled with quartz veins to the faults,and it is accompanied by the precipitation and enrichment of hydrothermal fluids to form industrial ore bodies,and some NE-NNE and NW fractures are mineralized;Stage III in NE-NEE postmineral structure formed by compressive stress,partially developed NNE and cut pre-NE fracture;Stage IV is post-mineral structure formed by NWW compressive stress-NW left-sliding slide fault.It is concluded that the NNE fault formed in the stage I has good ore-bearing property,which is of guiding significance for later prospecting.
引文
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郭保健,戴塔根,黄德志,等.熊耳山西段银多金属矿成矿规律及深部成矿预测研究报告[R].洛阳:河南省有色金属地质矿产局第六地质大队,中南大学地学与环境工程学院,2009.GUO Baojian,DAI Peigen,HUANG Dezhi,et al.Study on metallogenic regularity and deep metallogenic prognosis of silver polymetallic deposits in the western part of Xiong'erhan[R].Luoyang:The 6th Team of Henan Province Non-ferrous Metals Mineral Resources Bureau and School of Geoscience and Environmental Engineering,Central South University,2009.
郭保健,李永峰,王志光,等.熊耳山Au-Ag-Pb-Mo矿集区成矿模式与找矿方向[J].地质与勘探,2005,41(5):43-47.GUO Baojian,LI Yongfeng,WANG Zhiguang,et al.Type,metallogenetic regularities,mineralization model and prospecting proposal in the Xiong'ershan district[J].Geology and Prospecting,2005,41(5):43-47.
毛景文,郑榕芬,叶会寿,等.豫西熊耳山地区沙沟银铅锌矿床成矿的40 Ar-39 Ar年龄及其地质意义[J].矿床地质,2006,25(04):359-368.MAO Jingwen,ZHENG Rongfen,YE Huishou,et al.40 Ar/39 Ar 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,2006,25(04):359-368.
庞绪成,赵少攀,杨剧文,等.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[J].地质与勘探,2015,51(05):828-837.PANG Xucheng,ZHAO Shaopan,YANG Juwen,et al.Metallogenic stages and the homogenization temperature of fluid inclusions from the Longmendian silver deposit in Luoning city,Henan Province[J].Geology and Exploration,2015,51(5):828-837.
彭渊,马寅生,刘成林,等.柴达木盆地北缘晚海西-印支期古构造应力分析[J].地球学报,2015,36(01):51-59.PENG Yuan,MA Yinsheng,LIU Chenglin,et al.An Analysis of Late Hercynian-Indosinian Paleotectonic Stress on the Northern Margin of the Qaidam Basin[J].Acta Geoscientica Sinica,2015,36(01):51-59.
王宗起,闫全人,闫臻,等.秦岭造山带主要大地构造单元的新划分[J].地质学报,2009,83(11):1527-1546.WANG Zongqi,YAN Quanren,YAN Zhen,et al.New Division of the Main Tectonic Units of the Qinling Orogenic Belt,Central China[J].2009,83(11):1527-1546.
赵少攀,庞绪成,郭跃闪,等.河南龙门店银矿断裂构造分形特征分析[J].黄金科学技术,2015,23(03):12-18.ZHAO Shaopan,PANG Xucheng,GUO Yueshan,et al.A-nalysis of Fractal Characteristics at the Longmendian Silver Mine in Henan Province[J].Gold Science and Technology,2015,23(3):12-18.
陈衍景,隋颖慧,FRANCO P.J.CMF模式的排他性依据和造山型银矿实例:东秦岭铁炉坪银矿同位素地球化学[J].岩石学报,2003,19(3):551-568.CHEN Yanjing.,FRANCO Pirajno.,SUI Yinghui.Isotope geochemistry of the Tieluping silver-lead deposit,Henan,China:A case study of orogenic silver-dominated deposits and related tectonic setting[J].Mineralium Deposita,2004,39(5-6):560-575.
程广国.河南熊耳山西段银铅锌矿床成矿作用及找矿预测研究[D].北京:中国地质大学(北京),2013.CHENG Guangguo.Studty on the Mineralization and Prognosis in Western Mt.Xiong'er Silver-Lead-Zinc Deposit,Henan Province[D].Beijing:China University of Geosciences(Beijing),2013.
宫江华.熊耳山西段银多金属矿床控矿规律及深边部找矿预测[D].湖南:中南大学,2009.GONG Jianghua.Ore-controlling discipline and prediction for deep or adjacent ore prospecting of Ag-polymetallic deposits in Western part of Xiong'ershan[D].Hunan:Central South University,2009.
梁涛,白凤军,罗照华,等.豫西熊耳山斑竹寺花岗斑岩岩体锆石U-Pb定年及地质意义[J].西北地质,2014,47(02):41-50.LIANG Tao,BAI Fengjun,LUO Zhaohua,et al.LA-ICP-MS zircon U-Pb dating and its geological implications of Banzhusi granitic prophyry in Xiong'ershan of Western Henan Province[J].Northwestern Geology,2014,47(02):41-50.
彭恩生,奚小双,张增荣,等.河南洛宁地区断裂构造带金银富集规律及远景评价[R].长沙:中南工业大学地质矿产研究所构造研究室,1991.PENG Ensheng,XI Xiaoshuang,ZHANG Zengrong,et al.Enrichment regularity and prospect evaluation of gold and silver in fault structural belt of Luoning area,Henan[R].Changsha:Institute of Geology Mineral Resources and Structural Research,Central South University of Technology,1991.
宋凯.豫西上宫金矿田控矿构造与成矿作用研究[D].石家庄:石家庄经济学院,2014.SONG Kai.Shanggong gold deposit ore-controlling structure and mineralization studies in western Henan Province[D].Shijiazhuang:Shijiazhuang University of Economics,2014.
魏庆国,姚军明,赵太平,等.东秦岭发现~1.9Ga钼矿床-河南龙门店钼矿床Re-Os定年[J].岩石学报,2009,25(11):2747-2751.WEI Qingguo,YAO Junming,ZHAO Taiping,et al.Discovery of a~1.9Ga Mo deposit in the eastern Qinling orogen:Molybdenite Re-Os ages of the Longmendin Mo deposit in Henan Province[J].Acta Petrologica Sinica,2009,25(11):2747-2751.
张明亮,梁海彬,轩慎英.河南省熊耳山地区金及多金属矿远景分析[J].矿床地质,2008,(S1):177-181.ZHANG Mingliang,LIANG Haibin,XUAN Shenying.Gold and polymetallic perspective analysis of Xiong'ershan area in Henan Province[J].Mineral Deposits,2008,(S1):177-181.
赵定生.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,2011,19(06):18-21.ZHAO Dingsheng.Research on the Geological Characteristics and Mineralization Regularity of Longmendian Silver Mine,Henan Province[J].Gold Since and Technology,2011,19(06):18-21.
陈衍景,富士谷.豫西金矿成矿规律[M].北京:地震出版社,1992.CHEN Yanjing,FU Shigu.Metallogenic regularity of gold deposits in western Henan[M].Beijing:Seismological Press,1992.
陈衍景,隋颖慧,FRANCO P.J.CMF模式的排他性依据和造山型银矿实例:东秦岭铁炉坪银矿同位素地球化学[J].岩石学报,2003,19(3):551-568.CHEN Yanjing,SUI Yinghui,FRANCO Pirajno.Exclusive evidences for CMF model and a case of orogenic silver deposits:Isotope geochemistry of the Tieluping silver deposit,east Qinling orogen[J].2003,19(3):551-568.
郭保健,戴塔根,黄德志,等.熊耳山西段银多金属矿成矿规律及深部成矿预测研究报告[R].洛阳:河南省有色金属地质矿产局第六地质大队,中南大学地学与环境工程学院,2009.GUO Baojian,DAI Peigen,HUANG Dezhi,et al.Study on metallogenic regularity and deep metallogenic prognosis of silver polymetallic deposits in the western part of Xiong'erhan[R].Luoyang:The 6th Team of Henan Province Non-ferrous Metals Mineral Resources Bureau and School of Geoscience and Environmental Engineering,Central South University,2009.
郭保健,李永峰,王志光,等.熊耳山Au-Ag-Pb-Mo矿集区成矿模式与找矿方向[J].地质与勘探,2005,41(5):43-47.GUO Baojian,LI Yongfeng,WANG Zhiguang,et al.Type,metallogenetic regularities,mineralization model and prospecting proposal in the Xiong'ershan district[J].Geology and Prospecting,2005,41(5):43-47.
毛景文,郑榕芬,叶会寿,等.豫西熊耳山地区沙沟银铅锌矿床成矿的40 Ar-39 Ar年龄及其地质意义[J].矿床地质,2006,25(04):359-368.MAO Jingwen,ZHENG Rongfen,YE Huishou,et al.40 Ar/39 Ar 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,2006,25(04):359-368.
庞绪成,赵少攀,杨剧文,等.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[J].地质与勘探,2015,51(05):828-837.PANG Xucheng,ZHAO Shaopan,YANG Juwen,et al.Metallogenic stages and the homogenization temperature of fluid inclusions from the Longmendian silver deposit in Luoning city,Henan Province[J].Geology and Exploration,2015,51(5):828-837.
彭渊,马寅生,刘成林,等.柴达木盆地北缘晚海西-印支期古构造应力分析[J].地球学报,2015,36(01):51-59.PENG Yuan,MA Yinsheng,LIU Chenglin,et al.An Analysis of Late Hercynian-Indosinian Paleotectonic Stress on the Northern Margin of the Qaidam Basin[J].Acta Geoscientica Sinica,2015,36(01):51-59.
王宗起,闫全人,闫臻,等.秦岭造山带主要大地构造单元的新划分[J].地质学报,2009,83(11):1527-1546.WANG Zongqi,YAN Quanren,YAN Zhen,et al.New Division of the Main Tectonic Units of the Qinling Orogenic Belt,Central China[J].2009,83(11):1527-1546.
赵少攀,庞绪成,郭跃闪,等.河南龙门店银矿断裂构造分形特征分析[J].黄金科学技术,2015,23(03):12-18.ZHAO Shaopan,PANG Xucheng,GUO Yueshan,et al.A-nalysis of Fractal Characteristics at the Longmendian Silver Mine in Henan Province[J].Gold Science and Technology,2015,23(3):12-18.
陈衍景,隋颖慧,FRANCO P.J.CMF模式的排他性依据和造山型银矿实例:东秦岭铁炉坪银矿同位素地球化学[J].岩石学报,2003,19(3):551-568.CHEN Yanjing.,FRANCO Pirajno.,SUI Yinghui.Isotope geochemistry of the Tieluping silver-lead deposit,Henan,China:A case study of orogenic silver-dominated deposits and related tectonic setting[J].Mineralium Deposita,2004,39(5-6):560-575.