冀北地区龙头山铅多金属矿床的发现及地物化综合找矿模型的建立
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摘要
隐伏矿是当前矿产地质勘查的重点对象。在综合研究冀北地区1∶20万区域示矿信息基础上,优选出锥子山花岗岩体一带的龙头山为找矿靶区,研究显示其具有较好的找矿潜力。1∶5万水系沉积物地球化学测量圈定出11处综合异常;其中H6异常属于矿致异常。H6异常经1∶1万地物化测量显示:Ag、Pb、Zn、Au等元素异常值高,具有外带—中带—内带三级分带;同时具有中低阻高极化的激电异常、蚀变矿(化)带与物化探异常相耦合的特征。通过进行系统地不同尺度地物化测量,缩小了找矿靶区,经工程验证发现了龙头山铅多金属矿床。矿体赋存在北西西向延伸、宽30～60 m的龙头山(F3)断裂构造系统中、产状较陡,赋矿围岩为太古界单塔子群(花岗)片麻岩和晚侏罗世张家口组安山岩,矿石多为细脉—浸染状、致密块状构造,矿床特征与毗邻的小扣花营、牛圈等多金属矿床类似,属于中低温热液脉型铅多金属矿床。最后,根据大比例尺地物化示矿信息特征,厘定了热液脉型铅多金属矿床的找矿标志,建立了地物化综合找矿模型,有利于推进冀北地区的找矿勘查。
Concealed ore is the key object of mineral exploration at present. Based on the 1 ∶ 200000 regional prospecting information in northern Hebei province,the Longtoushan prospecting target around the Zhuizishan granite mass has good prospecting potential. 1 ∶ 50000 geochemical survey of stream sediement delineates 11 comprehensive anomalies,among them,H6 anomaly is the mineral-induced anomaly. The results of the 1 ∶ 10000 geological,geophysical and geochemical survey show that anomaly of Ag,Pb,Zn,Au and other elements have high outlier values,with three levels of zones from the outer zone,middle zone to the inner zone. It has the characteristics of low resistance and high polarization induced electrical anomaly. Altered and mineralized zones are coupled with geophysical and geochemical anomalies. Through systematic geophysical and geochemical survey of different scales and the engineering verification,the Longtoushan lead polymetallic deposit was discovered. Orebodies occur in the F3 fault system with NWW extending and 30 ～ 60 m wide. The wall rocks are the archean Dantazi group gneiss and late Jurassic Zhangjiakou group andesite. The ores are mostly vein-disseminated and dense block structured,and the deposit features are similar to the adjacent Xiaokouhuaying deposit,the Niujuan deposit and other polymetallic deposits,belonging to the medium-low temperature hydrothermal vein type lead polymetallic deposit. According to the characteristics of geological,geophysical and geochemical prospecting information,the integrated prospecting model is established and the prospecting indicators of hydrothermal vein type lead polymetallic deposits are determined,which is conducive to advancing the prospecting and exploration in northern Hebei province.
Concealed ore is the key object of mineral exploration at present. Based on the 1 ∶ 200000 regional prospecting information in northern Hebei province,the Longtoushan prospecting target around the Zhuizishan granite mass has good prospecting potential. 1 ∶ 50000 geochemical survey of stream sediement delineates 11 comprehensive anomalies,among them,H6 anomaly is the mineral-induced anomaly. The results of the 1 ∶ 10000 geological,geophysical and geochemical survey show that anomaly of Ag,Pb,Zn,Au and other elements have high outlier values,with three levels of zones from the outer zone,middle zone to the inner zone. It has the characteristics of low resistance and high polarization induced electrical anomaly. Altered and mineralized zones are coupled with geophysical and geochemical anomalies. Through systematic geophysical and geochemical survey of different scales and the engineering verification,the Longtoushan lead polymetallic deposit was discovered. Orebodies occur in the F3 fault system with NWW extending and 30 ～ 60 m wide. The wall rocks are the archean Dantazi group gneiss and late Jurassic Zhangjiakou group andesite. The ores are mostly vein-disseminated and dense block structured,and the deposit features are similar to the adjacent Xiaokouhuaying deposit,the Niujuan deposit and other polymetallic deposits,belonging to the medium-low temperature hydrothermal vein type lead polymetallic deposit. According to the characteristics of geological,geophysical and geochemical prospecting information,the integrated prospecting model is established and the prospecting indicators of hydrothermal vein type lead polymetallic deposits are determined,which is conducive to advancing the prospecting and exploration in northern Hebei province.
引文
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[18]陈松,陈长敬,吴俊,等.物探方法在强风化区填图中的应用探索[J].地质力学学报,2017,23(2):206~213.CHEN Song,CHEN Changjing,WU Jun,et al. Application and exploration of geophysical methods in geological mapping in strongly weathered area[J]. Journal of Geomechanics,2017,23(2):206~213.(in Chinese with English abstract)
[19]孙晓昔.大功率激电测深在寻找有色金属矿方面的应用[J].地质装备,2007,8(6):15~17.SUN Xiaoxi. The application of large power electrical system in non-ferrous metal propection[J]. Equipment for Geotechnical Engineering,2007,8(6):15~17.(in Chinese with English abstract)
[20]祁晓雨,张胜业,石砚斌.大功率激电测深在内蒙古某铅锌矿的应用[J].工程地球物理学报,2008,5(6):719~723.QI Xiaoyu,ZHNAG Shengye,SHI Yanbin. The application of the large power induced polarization sounding method in a Mongolian lead-zinc deposit[J]. Chinese Journal of Engineering Geophysics,2008,5(6):719~723.(in Chinese with English abstract)
[21]刘国辉,王天意,徐国志,等.大功率激电在内蒙古扎鲁特旗某多金属矿勘查中的应用[J].工程地球物理学报,2009,6(5):592~597.LIU Guohui,WANG Tianyi,XU Guozhi,et al. Application of high-power IP to multi-metal ores investigation in Zhalute county of Inner Mongolia[J]. Chinese Journal of Engineering Geophysics,2009, 6(5):592~597.(in Chinese with English abstract)
[22]杨建平.激电测深正反演在内蒙古自治区义盛店银多金属矿区的找矿应用[J].地质调查与研究,2011,34(1):71~75.YANG Jianping. Application of IP sounding inversion in the Yishengdian silver polymetallic deposit,Inner Mongolia[J].Geological Survey and Research,2011,34(1):71~75.(in Chinese with English abstract)
[23]王世称.综合信息矿产预测理论与方法体系新进展[J].地质通报,2010,29(10):1399~1403.WANG Shicheng. The new development of theory and method of synthetic information mineral resources prognosis[J].Geological Bulletin of China,2010,29(10):1399~1403.(in Chinese with English abstract)
[24]张欢欢,陈虹,白和,等.陕西小秦岭金矿床“三位一体”勘查区找矿预测地质模型及找矿意义[J].地质力学学报,2018,24(3):350~370.ZHANG Huanhuan,CHEN Hong,BAI He,et al. Geological model for prospecting prediction in“Trinity”prospecting area in the Xiaoqinling gold deposit in Shannxi and its prospecting significance[J]. Journal of Geomechanics,2018,24(3):350~370.(in Chinese with English abstract)
[25] Adams S S,Putnam B R. Application of mineral deposit models in exploration:a case study of sediment-hosted gold deposits,Great Basin,Western United States[J]. Geological Society,London,Special Publications,1992,63(1):1~23.
[26]施俊法,唐金荣,周平,等.关于找矿模型的探讨[J].地质通报,2011,30(7):1119~1125.SHI Junfa,TANG Jinrong,ZHOU Ping,et al. A discussion on the exploration model[J]. Geological Bulletin of China,2011,30(7):1119~1125.(in Chinese with English abstract)
[2] Manshad A K,Jalalifar H,Aslannejad M. Analysis of vertical,horizontal and deviated wellbores stability by analytical and numerical methods[J]. Journal of Petroleum Exploration&Production Technology,2014,4(4):359~369.
[3]李进文,朱广仁,张德全,等.内蒙古东珺铅锌银矿床的发现——地物化综合找矿勘查方法的运用[J].矿床地质,2009,28(6):830~837.LI Jinwen,ZHU Guangren,ZHANG Dequan,et al. Discovery of Dongjun lead-zinc-silver deposit in Inner Mongolia:An integrated application of geological, geochemical and geophysical prospecting methods[J]. Mineral Deposits,2009,28(6):830~837.(in Chinese with English abstract)
[4] Gao S,Rudnick R L,Yuan H L,et al. Recycling lower continental crust in the North China craton[J]. Nature,2004,432(7019):892~897.
[5] Zhai M G,Santosh M. The early Precambrian odyssey of the North China Craton:A synoptic overview[J]. Gondwana Research,2011,20(1):6~25.
[6] Zhao G C,Cawood P A,Wilde S A,et al. Metamorphism of basement rocks in the Central Zone of the North China Craton:implications for Paleoproterozoic tectonic evolution[J].Precambrian Research,2000,103(1~2):55~88.
[7]李久明,叶强,刘伟江,等.冀北中生代内生有色金属成矿规律及其动力学浅析[J].矿产与地质,2011,25(2):98~104.LI Jiuming,YE Qiang,Liu Weijiang,et al. Discussion on metallogenic regularities and dynamics of Mesozoic endogenous non-ferrous metals of Northern Hebei[J]. Mineral Resources&Geology,2011,25(2):98~104.(in Chinese with English abstract)
[8]刘钧沅,张万鹏,赵振华,等.地物化综合方法在冀北某区隐伏矿(化)体预测定位中的应用[J].矿产勘查,2014,5(5):773~779.LIU Junyuan, ZHANG Wanpeng, ZHAO Zhenhua, et al.Application of comprehensive geological, geophysical and geochemical exploration technology in predicating the concealed orebodies in the northern Hebei[J]. Mineral Exploration,2014,5(5):773~779.(in Chinese with English abstract)
[9]樊玉朋,贾正海,王星琰,等.冀北围场县锥子山一带侵入岩岩石化学特征及成矿意义[J].中国地质调查,2017,4(6):50~57.FAN Yupeng, JIA Zhenghai, WANG Xingyan, et al.Geochemical characteristics and metallogenic significance of intrusive rocks in Zhuizi Mountain of Weichang County,North Hebei[J]. Geological Survey of China,2017,4(6):50~57.(in Chinese with English abstract)
[10]夏国礼,潘洪儒,胡醒民.冀北双井子穹状火山与银铅(锌)矿化的关系[J].地质调查与研究,2005,28(2):94~99.XIA Guoli, PAN Hongru, HU Xingmin. On the relation between the domelike volcanics and Au-Pb-(Zn)mineralization in Shuangjingzi,Northern Hebei Province[J].Geological Survey and Research,2005,28(2):94~99.(in Chinese with English abstract)
[11]毕伏科,肖文暹.河北省成矿区带和找矿远景区[J].地质调查与研究,2006,29(2):107~114.BI Fuke,XIAO Wenxian. The ore-forming and prospective zones in Hebei province[J]. Geological Survey and Research,2006,29(2):107~114.(in Chinese with English abstract)
[12] Mann A W,Birrell R D,Mann A T,et al. Application of the mobile metal ion technique to routine geochemical exploration[J]. Journal of Geochemical Exploration,1998,61(1~3):87~102.
[13] Cohen D R,Kekky D L,Anand R,et al. Major advances in exploration geochemistry, 1998~2007[J]. Geochemistry:Exploration,Environment,Analysis,2010,10(1):3~16.
[14] Coker W B. Future research directions in exploration geochemistry[J]. Geochemistry:Exploration,Environment,Analysis,2010,10(1):75~80.
[15]高忠晖,徐涛,李崴崴,等.辽宁大营子地区1∶5万水系沉积物测量异常评价及找矿方向[J].黄金,2018,39(1):9~19.GAO Zhonghui, XU Tao, LI Weiwei, et al. Evaluation of anomaly based on 1∶50 000 stream sediment survey and its oreprospecting significance in Dayingzi Region,Liaoning Province[J]. Gold,2018,39(1):9~19.(in Chinese with English abstract)
[16]刘向冲,王文磊,裴英茹.西藏多龙矿集区水系沉积物地球化学数据定量分析与解释[J].地质力学学报,2017,23(5):695~706.LIU Xiangchong, WANG Wenlei, PEI Yingru. Quantitative analysis and interpretation of the geochemical data of the stream sediment in Duolong mineral district, Tibet, China[J].Journal of Geomechanics,2017,23(5):695~706.(in Chinese with English abstract)
[17]赵晓平,俞有峰.大功率直流激电法在铅锌矿上的应用[J].甘肃地质学报,2003,12(2):93~96.ZHAO Xiaoping, YU Youfeng. Application of mega-power induced galvanic polarization method on prospecting Lead-Zinc deposit[J]. Acta Geologica Gansu,2003,12(2):93~96.(in Chinese with English abstract)
[18]陈松,陈长敬,吴俊,等.物探方法在强风化区填图中的应用探索[J].地质力学学报,2017,23(2):206~213.CHEN Song,CHEN Changjing,WU Jun,et al. Application and exploration of geophysical methods in geological mapping in strongly weathered area[J]. Journal of Geomechanics,2017,23(2):206~213.(in Chinese with English abstract)
[19]孙晓昔.大功率激电测深在寻找有色金属矿方面的应用[J].地质装备,2007,8(6):15~17.SUN Xiaoxi. The application of large power electrical system in non-ferrous metal propection[J]. Equipment for Geotechnical Engineering,2007,8(6):15~17.(in Chinese with English abstract)
[20]祁晓雨,张胜业,石砚斌.大功率激电测深在内蒙古某铅锌矿的应用[J].工程地球物理学报,2008,5(6):719~723.QI Xiaoyu,ZHNAG Shengye,SHI Yanbin. The application of the large power induced polarization sounding method in a Mongolian lead-zinc deposit[J]. Chinese Journal of Engineering Geophysics,2008,5(6):719~723.(in Chinese with English abstract)
[21]刘国辉,王天意,徐国志,等.大功率激电在内蒙古扎鲁特旗某多金属矿勘查中的应用[J].工程地球物理学报,2009,6(5):592~597.LIU Guohui,WANG Tianyi,XU Guozhi,et al. Application of high-power IP to multi-metal ores investigation in Zhalute county of Inner Mongolia[J]. Chinese Journal of Engineering Geophysics,2009, 6(5):592~597.(in Chinese with English abstract)
[22]杨建平.激电测深正反演在内蒙古自治区义盛店银多金属矿区的找矿应用[J].地质调查与研究,2011,34(1):71~75.YANG Jianping. Application of IP sounding inversion in the Yishengdian silver polymetallic deposit,Inner Mongolia[J].Geological Survey and Research,2011,34(1):71~75.(in Chinese with English abstract)
[23]王世称.综合信息矿产预测理论与方法体系新进展[J].地质通报,2010,29(10):1399~1403.WANG Shicheng. The new development of theory and method of synthetic information mineral resources prognosis[J].Geological Bulletin of China,2010,29(10):1399~1403.(in Chinese with English abstract)
[24]张欢欢,陈虹,白和,等.陕西小秦岭金矿床“三位一体”勘查区找矿预测地质模型及找矿意义[J].地质力学学报,2018,24(3):350~370.ZHANG Huanhuan,CHEN Hong,BAI He,et al. Geological model for prospecting prediction in“Trinity”prospecting area in the Xiaoqinling gold deposit in Shannxi and its prospecting significance[J]. Journal of Geomechanics,2018,24(3):350~370.(in Chinese with English abstract)
[25] Adams S S,Putnam B R. Application of mineral deposit models in exploration:a case study of sediment-hosted gold deposits,Great Basin,Western United States[J]. Geological Society,London,Special Publications,1992,63(1):1~23.
[26]施俊法,唐金荣,周平,等.关于找矿模型的探讨[J].地质通报,2011,30(7):1119~1125.SHI Junfa,TANG Jinrong,ZHOU Ping,et al. A discussion on the exploration model[J]. Geological Bulletin of China,2011,30(7):1119~1125.(in Chinese with English abstract)