郭家沟大型隐伏铅锌矿床的发现与意义
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摘要
郭家沟大型隐伏铅锌矿床的发现历时约10年时间。该矿床位于西成铅锌矿带(田)的东段,属于洛坝铅锌矿床的东延,在地表无任何矿化显示的情况下,首先通过分析地质成矿环境,确定找矿靶区;然后使用激发极化发现异常,并采用音频大地电磁法研究深部含矿层位、控矿构造形态;最后通过研究区域构造、围岩蚀变、含矿地层及岩性组合特征,得出:郭家沟矿区含矿带地层挟持于F1与F5断裂之间,形成一个呈东西向展布的舌状地质构造体,是寻找本类型铅锌矿的直接标志;矿体集中分布在中泥盆统安家岔组焦沟层(D2a2-2b)千枚岩与(D2a2-2a)厚层结晶灰岩、生物碎屑灰岩、硅化灰岩接触带的硅化灰岩一侧;另外,硅化、铁白云石化、黄铁矿化、碳酸盐化(网脉状)、碎裂角砾岩等蚀变是找矿的重要标志。通过矿床的发现经过、矿床地质特征及物探异常特征研究,指出了该区的找矿方向。郭家沟大型隐伏铅锌矿床的发现拓宽了西成铅锌矿带(田)的找矿空间。
The discovery of the large concealed Pb-Zn deposit in the Guojiagou ore district has taken about ten yeas. It is in the east of the Xicheng lead-zinc ore belt,and is the eastern extension of the Luoba deposit,where there is no surface indication of mineralization. To explore this deposit,we firstly analyzed the geological metallogenic environments to determine the target,and then measured geophysical anomalies by the induced-polarization method,and utilized the audio magnetotelluric sounding method( AMT) to probe the ore-bearing horizons and ore-controlling structure at depth. And based on the regional structures,wall rock alteration,ore-bearing strata and lithology,it is concluded that the Guojiagou ore belt lies between the F1 and F5faults as a tongue-like geological structure in the east-west direction,which is the direct ore-prospecting markers. The ores are mainly distributed in the middle Devonian Anjiacha Fm.(D2a2-2b) phyllite,and thick crystalline limestone,bioclastic limestone,meuliere side of the meuliere contact zones of D2a2-2a. Silicification,iron dolomitization,pyritization,carbonatation(mesh-vein structure),where fractured breccia are important prospecting indicators. This work helps to direct prospecting,and to enlarge the prospecting space of the Xicheng lead-zinc ore belt.
The discovery of the large concealed Pb-Zn deposit in the Guojiagou ore district has taken about ten yeas. It is in the east of the Xicheng lead-zinc ore belt,and is the eastern extension of the Luoba deposit,where there is no surface indication of mineralization. To explore this deposit,we firstly analyzed the geological metallogenic environments to determine the target,and then measured geophysical anomalies by the induced-polarization method,and utilized the audio magnetotelluric sounding method( AMT) to probe the ore-bearing horizons and ore-controlling structure at depth. And based on the regional structures,wall rock alteration,ore-bearing strata and lithology,it is concluded that the Guojiagou ore belt lies between the F1 and F5faults as a tongue-like geological structure in the east-west direction,which is the direct ore-prospecting markers. The ores are mainly distributed in the middle Devonian Anjiacha Fm.(D2a2-2b) phyllite,and thick crystalline limestone,bioclastic limestone,meuliere side of the meuliere contact zones of D2a2-2a. Silicification,iron dolomitization,pyritization,carbonatation(mesh-vein structure),where fractured breccia are important prospecting indicators. This work helps to direct prospecting,and to enlarge the prospecting space of the Xicheng lead-zinc ore belt.
引文
Chen Guang.2002.Rock and ore evidence of thermal-water-sedimentarymetallogenesis in Xicheng lead-zinc metallogenic provinces[J].ActaGeologic Gansu,11(1):32-43(in Chinese)
Deng Hai-jun.Zhu Duo-lu.2010.Metallogenic series and ore-searchingprospect in the Xicheng mineralization area of Gansu Province[J].Geology and Prospecting,46(6):1045-1050(in Chinese with English abstract)
Editorial Commission on Gansu Province Volume of Discovery History ofChinese Mineral Deposits.1996.The discovery history of Chinesemineral deposits-Gansu Province Volume[M].Beijing:GeologicalPublishing House:955-960(in Chinese)
Lin Li,Pang Yan-chun,Fu Xiu-gen,Zhu Li-dong,Wang Xin-li,Ma Yeqing.2006.The physical characteristic and ore-forming conditions ofthe Luo ba lead-zinc deposit in Qinling,China[J].Journal of Chengdu University of Technology(Social Sciences),33(6):617-620(inChinese with English abstract)
Li Ying,Li Lian-sheng.1991.The quartzite genesis of the Luoba lead-zincdeposit[J].Xi’an Geological College Journal,13(4):10-19(inChinese with English abstract)
Ma Guo-liang,Beaudoin G,Qi Si-jing.2004.Geology and geochemistry ofthe Changba SEDEX Pb-Zn deposit,Qinling orogenic belt,China[J].Mineralium Deposita,39:380-395(in Chinese with Englishabstract)
Qi Wen,Hou Man-tang.2005.Types and prospecting trend of lead andzinc ores in Shanxi Province[J].Geology of Shanxi,23(2):1-19(in Chinese)
Sun Kuang-sheng,Peng De-qi.2005.Lead-zinc metallogenic types and oreprospecting direction in Gansu Province[J].Geology and Prospecting,41(1):22-27(in Chinese)
Sun Xing-li,Zeng Yun-fu.2002.Isotopic tracer of material origin for hydrothermal sedimentary rocks and significance in Xicheng mineralization area[J].Northwestern Geology,20(1):41-46(in Chinese)
Sun Xing-li,Gao Zhao-kui,Wei Xiao-hui.2000.The geological and geochemical characteristics of the cherts in the Xicheng and hydrothermal sedimentary ore-forming[J].Northwest Geology,33(2):1-7(in Chinese with English abstract)
Wang Jing-hu,Zhang Fu-xin,Yu Zai-ping.2002.Minerogenetic series ofmetallic ore deposits in the Qinling Mountains and tectonodynamicbackground of the continental orogenic belts[J].Geology in China,29(2):192-196(in Chinese)
Wang Ji-lei,He Bo-xi,Li Jian-zhong.1996.Qin-ling-type lead-zinc deposits[M].Beijing:Geological Publishing House:83-97(in Chinese)
Wang Bao-hua.2010.Geologic feature and prospecting criteria of leadzinc deposit in Guo Jia Gou of Lixian County in Gansu Province[J].Scienfic&Technical Information of Gansu,39(5):79-82(in Chinese)
Wang Feng,Lu Yan-wei.2004.On ore-controlling factors and its genesisof the Xuejiagou lead-zinc deposit in Huixian County[J].GansuMetallurgy,26(2):35-37(in Chinese)
Zhu Di-chen,Zhu Li-dong,Lin Li,Xiong Yong-zhu,Pang Yan-chun,FuXiu-gen.2003.Organic mineralization of lead-zinc deposits in devonian system,Xicheng Ore Field[J].Journal of China University ofGeosciences(Social Sciences Edition),28(2):201-208(in Chinese with English abstract)
Zhu Xin-you,Wang Dong-bo,Wei Zhi-guo.Qiu Xiao-ping,Wang Ruiting.2008.Exhalative Lead-Zinc Deposits in Shallow Sea,SouthernXicheng Belt,Gansu Province[J].Acta Geologic Sincia,82(4):811-819(in Chinese with English abstract)
Zhu Xin-you,Wang Dong-bo,Wei Zhi-guo.2006.Faut controlling in LuoBa lead-zinc deposit,Gansu Province[J].Geology and Prospecting,41(6):38-41(in Chinese with English abstract)
Zhu Xin-you,Wang Dong-bo,Wei Zhi-guo,Wang Rui-yan,Qiu Xiaoping.2006.Metallogenic characteristic and relationship of ore deposits in the north and south lead-zinc zones in the Xi-cheng area,Gansu[J].Geology in China,33(6):1361-1370(in Chinese withEnglish abstract)
Zhu Xin-you,Wang Dong-bo,Wei Zhi-guo,Qiu Xiao-ping,Wang Ruiting.2005.REE characteristics of carbonate rocks in Xichen divonian basin and origin of dolomite in Changba lead-zinc deposit[J].Mineral Deposit,24(6):613-620(in Chinese)
陈光.2002.西成铅锌矿化集中区热水沉积成矿作用的岩矿证据[J].甘肃地质学报,11(1):32-43
邓海军,朱多录.2010.甘肃西成矿集区成矿系列及找矿前景[J].地质与勘探,46(6):1045-1050
林丽,庞艳春,付修根,朱利东,王新利,马叶情.2006.西成矿田洛坝矿床含矿层物性特征及成矿条件分析[J].成都理工大学学报(自然科学版),33(6):617-620
李英,李连生.1991.洛坝铅锌矿床的硅岩与成因[J].西安地质学院学报,13(4):10-19
齐文,侯满堂.2005.陕西铅锌矿类型及其找矿方向[J].陕西地质,23(2):1-19
孙矿生,彭德启.2005.甘肃省铅锌矿成矿类型及其找矿方向[J].地质与勘探,41(1):22-27
孙省利,曾允孚.2002.西成矿化集中区热水沉积岩物质来源的同位素示踪及其意义[J].沉积学报,20(1):41-46
孙省利,高兆奎,魏晓辉.2000.西成铅锌成矿带泥盆系硅质岩地质地球化学特征与热水沉积成矿[J].西北地质,33(2):1-7
王靖华,张复新,于在平.2002.秦岭金属矿床成矿系列与大陆造山带构造动力学背景Ⅱ[J].中国地质,29(2):192-196
王集磊,何伯墀,李健中.1996.中国秦岭型铅锌矿床[M].北京:地质出版社:152-156
王宝华.2010.甘肃省礼县郭家沟铅锌矿床地质特征及找矿标志[J].甘肃科技纵横,39(5):79-82
王锋,鲁燕伟.2004.徽县薛家沟铅锌矿床控矿因素及成因认识[J].甘肃冶金,26(2):35-37
朱弟成,朱利东,林丽,熊永柱,庞艳春,付修根.2003.西成矿田泥盆系铅锌矿床中的有机成矿作用[J].地球科学-中国地质大学学报,28(2):201-208
祝新友,汪东波,卫治国.2005.甘肃洛坝铅锌矿床的构造控矿作用[J].地质与勘探,41(6):38-41
祝新友,汪东波,卫治国,王瑞延,邱小平.2006.甘肃西成地区南北铅锌矿带矿床成矿特征及相互关系[J].中国地质,33(6):1361-1370
祝新友,汪东波,卫治国,邱小平,王瑞廷.2005.西成地区碳酸盐岩REE特征及厂坝矿床白云岩成因[J].矿床地质,24(6):613-620
中国矿床发现史甘肃卷编委会.1996.中国矿床发现史(甘肃卷)[M].北京:地质出版社:83-97
①王孝国,杨悟平,谢建军,席振铢.2011.甘肃省徽县郭家沟铅锌矿详查报告[R].
Deng Hai-jun.Zhu Duo-lu.2010.Metallogenic series and ore-searchingprospect in the Xicheng mineralization area of Gansu Province[J].Geology and Prospecting,46(6):1045-1050(in Chinese with English abstract)
Editorial Commission on Gansu Province Volume of Discovery History ofChinese Mineral Deposits.1996.The discovery history of Chinesemineral deposits-Gansu Province Volume[M].Beijing:GeologicalPublishing House:955-960(in Chinese)
Lin Li,Pang Yan-chun,Fu Xiu-gen,Zhu Li-dong,Wang Xin-li,Ma Yeqing.2006.The physical characteristic and ore-forming conditions ofthe Luo ba lead-zinc deposit in Qinling,China[J].Journal of Chengdu University of Technology(Social Sciences),33(6):617-620(inChinese with English abstract)
Li Ying,Li Lian-sheng.1991.The quartzite genesis of the Luoba lead-zincdeposit[J].Xi’an Geological College Journal,13(4):10-19(inChinese with English abstract)
Ma Guo-liang,Beaudoin G,Qi Si-jing.2004.Geology and geochemistry ofthe Changba SEDEX Pb-Zn deposit,Qinling orogenic belt,China[J].Mineralium Deposita,39:380-395(in Chinese with Englishabstract)
Qi Wen,Hou Man-tang.2005.Types and prospecting trend of lead andzinc ores in Shanxi Province[J].Geology of Shanxi,23(2):1-19(in Chinese)
Sun Kuang-sheng,Peng De-qi.2005.Lead-zinc metallogenic types and oreprospecting direction in Gansu Province[J].Geology and Prospecting,41(1):22-27(in Chinese)
Sun Xing-li,Zeng Yun-fu.2002.Isotopic tracer of material origin for hydrothermal sedimentary rocks and significance in Xicheng mineralization area[J].Northwestern Geology,20(1):41-46(in Chinese)
Sun Xing-li,Gao Zhao-kui,Wei Xiao-hui.2000.The geological and geochemical characteristics of the cherts in the Xicheng and hydrothermal sedimentary ore-forming[J].Northwest Geology,33(2):1-7(in Chinese with English abstract)
Wang Jing-hu,Zhang Fu-xin,Yu Zai-ping.2002.Minerogenetic series ofmetallic ore deposits in the Qinling Mountains and tectonodynamicbackground of the continental orogenic belts[J].Geology in China,29(2):192-196(in Chinese)
Wang Ji-lei,He Bo-xi,Li Jian-zhong.1996.Qin-ling-type lead-zinc deposits[M].Beijing:Geological Publishing House:83-97(in Chinese)
Wang Bao-hua.2010.Geologic feature and prospecting criteria of leadzinc deposit in Guo Jia Gou of Lixian County in Gansu Province[J].Scienfic&Technical Information of Gansu,39(5):79-82(in Chinese)
Wang Feng,Lu Yan-wei.2004.On ore-controlling factors and its genesisof the Xuejiagou lead-zinc deposit in Huixian County[J].GansuMetallurgy,26(2):35-37(in Chinese)
Zhu Di-chen,Zhu Li-dong,Lin Li,Xiong Yong-zhu,Pang Yan-chun,FuXiu-gen.2003.Organic mineralization of lead-zinc deposits in devonian system,Xicheng Ore Field[J].Journal of China University ofGeosciences(Social Sciences Edition),28(2):201-208(in Chinese with English abstract)
Zhu Xin-you,Wang Dong-bo,Wei Zhi-guo.Qiu Xiao-ping,Wang Ruiting.2008.Exhalative Lead-Zinc Deposits in Shallow Sea,SouthernXicheng Belt,Gansu Province[J].Acta Geologic Sincia,82(4):811-819(in Chinese with English abstract)
Zhu Xin-you,Wang Dong-bo,Wei Zhi-guo.2006.Faut controlling in LuoBa lead-zinc deposit,Gansu Province[J].Geology and Prospecting,41(6):38-41(in Chinese with English abstract)
Zhu Xin-you,Wang Dong-bo,Wei Zhi-guo,Wang Rui-yan,Qiu Xiaoping.2006.Metallogenic characteristic and relationship of ore deposits in the north and south lead-zinc zones in the Xi-cheng area,Gansu[J].Geology in China,33(6):1361-1370(in Chinese withEnglish abstract)
Zhu Xin-you,Wang Dong-bo,Wei Zhi-guo,Qiu Xiao-ping,Wang Ruiting.2005.REE characteristics of carbonate rocks in Xichen divonian basin and origin of dolomite in Changba lead-zinc deposit[J].Mineral Deposit,24(6):613-620(in Chinese)
陈光.2002.西成铅锌矿化集中区热水沉积成矿作用的岩矿证据[J].甘肃地质学报,11(1):32-43
邓海军,朱多录.2010.甘肃西成矿集区成矿系列及找矿前景[J].地质与勘探,46(6):1045-1050
林丽,庞艳春,付修根,朱利东,王新利,马叶情.2006.西成矿田洛坝矿床含矿层物性特征及成矿条件分析[J].成都理工大学学报(自然科学版),33(6):617-620
李英,李连生.1991.洛坝铅锌矿床的硅岩与成因[J].西安地质学院学报,13(4):10-19
齐文,侯满堂.2005.陕西铅锌矿类型及其找矿方向[J].陕西地质,23(2):1-19
孙矿生,彭德启.2005.甘肃省铅锌矿成矿类型及其找矿方向[J].地质与勘探,41(1):22-27
孙省利,曾允孚.2002.西成矿化集中区热水沉积岩物质来源的同位素示踪及其意义[J].沉积学报,20(1):41-46
孙省利,高兆奎,魏晓辉.2000.西成铅锌成矿带泥盆系硅质岩地质地球化学特征与热水沉积成矿[J].西北地质,33(2):1-7
王靖华,张复新,于在平.2002.秦岭金属矿床成矿系列与大陆造山带构造动力学背景Ⅱ[J].中国地质,29(2):192-196
王集磊,何伯墀,李健中.1996.中国秦岭型铅锌矿床[M].北京:地质出版社:152-156
王宝华.2010.甘肃省礼县郭家沟铅锌矿床地质特征及找矿标志[J].甘肃科技纵横,39(5):79-82
王锋,鲁燕伟.2004.徽县薛家沟铅锌矿床控矿因素及成因认识[J].甘肃冶金,26(2):35-37
朱弟成,朱利东,林丽,熊永柱,庞艳春,付修根.2003.西成矿田泥盆系铅锌矿床中的有机成矿作用[J].地球科学-中国地质大学学报,28(2):201-208
祝新友,汪东波,卫治国.2005.甘肃洛坝铅锌矿床的构造控矿作用[J].地质与勘探,41(6):38-41
祝新友,汪东波,卫治国,王瑞延,邱小平.2006.甘肃西成地区南北铅锌矿带矿床成矿特征及相互关系[J].中国地质,33(6):1361-1370
祝新友,汪东波,卫治国,邱小平,王瑞廷.2005.西成地区碳酸盐岩REE特征及厂坝矿床白云岩成因[J].矿床地质,24(6):613-620
中国矿床发现史甘肃卷编委会.1996.中国矿床发现史(甘肃卷)[M].北京:地质出版社:83-97
①王孝国,杨悟平,谢建军,席振铢.2011.甘肃省徽县郭家沟铅锌矿详查报告[R].