新疆若羌喀腊达坂铅锌矿床S同位素特征及找矿预测
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摘要
喀腊达坂铅锌矿床位于新疆阿尔金山脉东段喀腊大湾地区,矿床内矿体主要赋存于晚寒武世拉配泉组第二、三岩性段中。结合野外地质调查成果,选取了与成矿有关的硫化物样品进行S同位素示踪研究,结果表明:成矿流体w(~(34)S)大体为2.6‰~7.7‰,甚至小于2.6‰,硫化物的S同位素组成具有深源岩浆硫的特征。通过对矿区矿化蚀变特征、控矿要素及成矿地质体特征的研究,并结合S同位素特征,综合分析认为喀腊达坂铅锌矿床为受构造破碎带控制、与中酸性岩浆侵入作用有关的中低温热液型矿床,成矿时代为439.9 Ma。在此基础上构建了喀腊达坂铅锌矿床的找矿预测模型,即岩浆沿喀腊达坂断裂带及其分支系统上侵,在岩浆侵位及其流体出溶阶段派生出容矿断裂系统,其中主成矿断裂可能为成矿前断裂的再活动,分支断裂属于成矿期同生断裂,矿化类型为角砾岩带砾间充填型及其上盘裂隙带中的裂隙充填型。根据该模型开展了找矿预测及工程验证工作,在矿区及其外围共圈定了5个隐伏主矿体,新增了可观的Pb+Zn资源量,对于矿区后续找矿预测工作有一定的参考价值。
Kaladaban Pb-Zn deposit is located in the Kaladawan Area,which lies in the east part of Altyn Mountains in Xinjiang,the ore-bodies in the mining area are mainly hosted in the second and third lithology members of Late Cambrian Lapeiquan Formation.Combing with the field geological investigation results of the mining area,the sulphide samples related to mineralization are selected to carry out S isotope tracer study,the results show that w(34 S) value of metallogenic fluid is mainly from 2.6‰ to 7.7‰,especially for lowering than 2.6‰,the S isotopic composition of sulphide samples is characterized by deep source magmatic sulfur.The mineralized alteration characteristics,ore-controlling factor and characteristics of metallogenic geological bodies of the mining area are studied,combing with the S isotopic characteristics,the comprehensive analysis results indicated that the genesis type of Kaladaban Pb-Zn deposit is the medium-low temperature hydrothermal one that is related to intermediate-acid magmatic intrusion and controlled by structural fracture belts.Based on the above discussion results,the prospecting model of Kaladaban Pb-Zn deposit is established,the model can be described that the magma is invaded along the Kaladaban fault belt and its branch tectonic system,in the magmatic emplacement and its fluid release phase,the ore-bearing fracture system is developed,the branch faults is belongs to ones developed in the metallogenic period,the mineralization types is inter breccia filling type and fracture filling type developed in the fissure belts in the upper plate of breccia belt.Under the guiding of the prospecting model,some related prospecting prediction work and engineering verification works are conducted,about five main concealed ore-bodies are controlled in the mining area or its peripheral area,considerable Pb+Zn resources are obtained,which can provide some reliable reference for the further prospecting work in the mining area.
Kaladaban Pb-Zn deposit is located in the Kaladawan Area,which lies in the east part of Altyn Mountains in Xinjiang,the ore-bodies in the mining area are mainly hosted in the second and third lithology members of Late Cambrian Lapeiquan Formation.Combing with the field geological investigation results of the mining area,the sulphide samples related to mineralization are selected to carry out S isotope tracer study,the results show that w(34 S) value of metallogenic fluid is mainly from 2.6‰ to 7.7‰,especially for lowering than 2.6‰,the S isotopic composition of sulphide samples is characterized by deep source magmatic sulfur.The mineralized alteration characteristics,ore-controlling factor and characteristics of metallogenic geological bodies of the mining area are studied,combing with the S isotopic characteristics,the comprehensive analysis results indicated that the genesis type of Kaladaban Pb-Zn deposit is the medium-low temperature hydrothermal one that is related to intermediate-acid magmatic intrusion and controlled by structural fracture belts.Based on the above discussion results,the prospecting model of Kaladaban Pb-Zn deposit is established,the model can be described that the magma is invaded along the Kaladaban fault belt and its branch tectonic system,in the magmatic emplacement and its fluid release phase,the ore-bearing fracture system is developed,the branch faults is belongs to ones developed in the metallogenic period,the mineralization types is inter breccia filling type and fracture filling type developed in the fissure belts in the upper plate of breccia belt.Under the guiding of the prospecting model,some related prospecting prediction work and engineering verification works are conducted,about five main concealed ore-bodies are controlled in the mining area or its peripheral area,considerable Pb+Zn resources are obtained,which can provide some reliable reference for the further prospecting work in the mining area.
引文
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[11]刘兵.阿尔金山喀腊达坂一带火山成因块状硫化物型铅锌矿床地质特征及找矿前景[J].西北地质,2014,47(4):264-268.Liu Bing.Geological feature and ore prospecting potential of the volcanogenic massive sulfide lead-zinc deposit in Kaladaban Altun[J].Northwestern Geology,2014,47(4):264-268.
[12]崔玲玲.阿尔金山东段喀腊达坂铅锌矿地质特征及成因初探[D].北京:中国地质科学院,2010.Cui Lingling.The Characteristics and Genetic Analysis of Kaladaban Pb-Zn Deposit,East of Altun Taugh[D].Beijing:Chinese Academy of Geological Sciences,2010.
[13]陈柏林,王永,陈正乐,等.阿尔金山喀腊大湾地区控矿构造系统研究[J].地学前缘,2015,22(4):67-77.Chen Bolin,Wang Yong,Chen Zhengle,et al.A study of the structural system of ore-forming and ore-controlling in Kaladawan ore clustering area,Altun Taugh Mountains,NW China[J].Earth Science Frontiers,2015,22(4):67-77.
[14]陈柏林,蒋荣宝,李丽,等.阿尔金山东段喀腊大湾地区铁矿带的发现及其意义[J].地球学报,2009,30(2):1-13.Chen Bailin,Jiang Rongbao,Li Li,et al.Discovery of iron ore zones in the Kaladawan Area within the eastern part of the Altun Mountains and its significance[J].Acta Geoscientica Sinica,2009,30(2):1-13.
[15]张传林,王爱国,武斌,等.阿尔金喀拉达坂铅锌矿成矿作用[J].矿物学报,2015(S):261-262.Zhang Chuanlin,Wang Aiguo,Wu Bin,et al.The mineralization of Kaladaban lead-zinc ore deposit in Altun[J].Acta Mineralogica Sinica,2015(S):261-262.
[16]陈柏林,赵恒乐,马玉周,等.阿尔金山阿北银铅矿控矿构造特征与矿床成因初探[J].矿床地质,2012,31(1):13-26.Chen Bailin,Zhao Hengle,Ma Yuzhou,et al.A preliminary discussion on genesis and structural control of Abei silver-lead deposit in Eastern Altun Mountains[J].Mineral Deposits,2012,31(1):13-26.
[17]王岩,邢树文,肖克炎.西昆仑—阿尔金Fe-Pb-Zn-Au-稀有金属成矿带成矿特征及资源潜力[J].地质学报,2016,90(7):1353-1363.Wang Yan,Xing Shuwen,Xiao Keyan.Metallgoenic features and resource potential of the west Kunlun to Altun Fe-Pb-Zn-Au-Rare Metals metallgoenic belt[J].Acta Geologlca Sinica,2016,90(7):1353-1363.
[18]李希良.新疆若羌县喀腊达坂铅锌矿床找矿模式[J].采矿技术,2014,14(4):93-97.Li Xiliang.Kaladaban lead-zinc deposit prospecting model of Ruoqiang County in Xinjiang[J].Mining Technology,2014,14(4):93-97.
[19]张理刚.稳定同位素在地质科学中的应用:金属活化热液成矿作用及找矿[M].西安:陕西科学技术出版社,1985.Zhang Ligang.Application of Stable Isotopes in Geological Sciences:Mineralization of Metal Activated Hydrothermal and Prospecting[M].Xi'an:Shaanxi Science and Technology Press,1985.
[20]吴才来,杨经绥,姚尚志,等.北阿尔金巴什考供盆地南缘花岗杂岩体特征及锆石SHRIMP定年[J].岩石学报,2005,21(3):846-858.Wu Cailai,Yang Jingsui,Yao Shangzhi,et al.Characteristics of the granitoid complex and its zincon SHRIMP dating at the south margin of the Bashikaogong Basin,North Altun,NW China[J].Acta Petrologica Sinica,2005,21(3):846-858.
[21]韩凤彬,陈柏林,崔玲玲,等.阿尔金山喀腊大湾地区中酸性侵入岩SHRIMP年龄及其意义[J].岩石学报,2012,28(7):2277-2291.Han Fengbin,Chen Bailin,Cui Lingling,et al.Zircon SHRIMP UPb age of intermediate-acid intrusive rocks in Kaladabawan area,Eastern Altun Mountains,NW China and its implications[J].Acta Petrologica Sinica,2012,28(7):2277-2291.
[22]韩吟文,马振东,张宏飞.地球化学[M].北京:地质出版社,2003.Han Yinwen,Ma Zhendong,Zhang Hongfei.Geochemistry[M]Beijing:Geological Publishing House,2003.
[2]武彬,王爱国,鲍晓明,等.新疆若羌喀腊达坂铅锌矿地质特征及成矿条件分析[J].矿物学报,2015(S):950-951.Wu Bin,Wang Aiguo,Bao Xiaoming,et al.The analysis of metallogenic conditions and geological features of Kaladaban lead-zinc ore in Ruoqiang,Xinjiang[J].Acta Mineralogica Sinica,2015(S):950-951.
[3]陈柏林,祁万修,崔玲玲,等.阿尔金北缘喀腊达坂火山岩型铅锌矿床研究[J].地质学报,2017,91(8):1818-1835.Chen Bailing,Qi Wanxiuz,Cui Lingling,et al.The Kaladaban volcanogenic massive sulfide-type Pb-Zn deposit in northern Altun Mountains,NW China[J].Acta Geologica Sinica,2017,91(8):1818-1835.
[4]毛德宝,王克卓,钟长汀,等.阿尔金成矿带主要成矿系列及其地质特征[J].地质与勘探,2003,39(5):1-5.Mao Debao,Wang Kezhuo,Zhong Changting,et al.Metallogenic series and geological characteristics in the Altun metallogenic belt[J].Geology and Exploration,2003,39(5):1-5.
[5]毛德宝,武永平,葛桂平,等.阿尔金成矿带主要金属矿床地质地球化学特征及成因初探[J].地质调查与研究,2006,29(1):1-9.Mao Debao,Wu Yongping,Ge Guiping,et al.Geological and geochemical characteristics of the main metallic deposits in Altun metallogenic belt and a discussion on their genesis[J].Geological Survey and Research,2006,29(1):1-9.
[6]毛德宝,钟长汀,牛广华,等.阿尔金成矿带成矿规律与找矿预测[J].西北地质,2006,39(2):114-127.Mao Debao,Zhong Changting,Niu Guanghua,et al.Study on the metallogenic characteristics and target areas in the Altun Taugh metallogenic zone[J].Northwestern Geology,2006,39(2):114-127.
[7]赵更新,毛德宝,张燕,等.阿尔金成矿带加里东期主要成矿系统[J].地质调查与研究,2007,30(2):90-97.Zhao Gengxin,Mao Debao,Zhang Yan,et al.Main metallogenic systems of the Altyn metallogenic belt in Caledonian[J].Geological Survey and Research,2007,30(2):90-97.
[8]王小风,陈宣华,陈正乐,等.阿尔金地区成矿条件与远景预测[M].北京:地质出版社,2004.Wang Xiaofeng,Chen Xuanhua,Chen Zhengle,et al.Geological setting for Metallogenesis and Prospecting of Ore Deposits in the Altyn Taugh Area[M].Beijing:Geological Publishing House,2004.
[9]吴益平,陈克强,钟莉.新疆阿尔金断裂北缘喀腊大湾铜多金属矿床地质特征及控矿因素[J].地球科学与环境学报,2008,30(2):118-124.Wu Yiping,Chen Keyiang,Zhong Li.Geological feature and ore-controlling factors of Kaladawan copper-polymetal deposit in northern side of Altun fault,Xinjiang[J].Journal of Earth Sciences and Environment,2008,30(2):118-124.
[10]刘兵,曹福根,刘威国.阿尔金山喀腊大湾西铅锌矿床地质特征及成矿条件分析[J].新疆地质,2012(S):55-58.Liu Bing,Cao Fugen,Liu Weiguo,et al.Ueological feature and metallogenic condition analysis of Kaladawanxi Pb-Zn ore deposit in Altun Area[J].Xinjiang Geology,2012(S):55-58.
[11]刘兵.阿尔金山喀腊达坂一带火山成因块状硫化物型铅锌矿床地质特征及找矿前景[J].西北地质,2014,47(4):264-268.Liu Bing.Geological feature and ore prospecting potential of the volcanogenic massive sulfide lead-zinc deposit in Kaladaban Altun[J].Northwestern Geology,2014,47(4):264-268.
[12]崔玲玲.阿尔金山东段喀腊达坂铅锌矿地质特征及成因初探[D].北京:中国地质科学院,2010.Cui Lingling.The Characteristics and Genetic Analysis of Kaladaban Pb-Zn Deposit,East of Altun Taugh[D].Beijing:Chinese Academy of Geological Sciences,2010.
[13]陈柏林,王永,陈正乐,等.阿尔金山喀腊大湾地区控矿构造系统研究[J].地学前缘,2015,22(4):67-77.Chen Bolin,Wang Yong,Chen Zhengle,et al.A study of the structural system of ore-forming and ore-controlling in Kaladawan ore clustering area,Altun Taugh Mountains,NW China[J].Earth Science Frontiers,2015,22(4):67-77.
[14]陈柏林,蒋荣宝,李丽,等.阿尔金山东段喀腊大湾地区铁矿带的发现及其意义[J].地球学报,2009,30(2):1-13.Chen Bailin,Jiang Rongbao,Li Li,et al.Discovery of iron ore zones in the Kaladawan Area within the eastern part of the Altun Mountains and its significance[J].Acta Geoscientica Sinica,2009,30(2):1-13.
[15]张传林,王爱国,武斌,等.阿尔金喀拉达坂铅锌矿成矿作用[J].矿物学报,2015(S):261-262.Zhang Chuanlin,Wang Aiguo,Wu Bin,et al.The mineralization of Kaladaban lead-zinc ore deposit in Altun[J].Acta Mineralogica Sinica,2015(S):261-262.
[16]陈柏林,赵恒乐,马玉周,等.阿尔金山阿北银铅矿控矿构造特征与矿床成因初探[J].矿床地质,2012,31(1):13-26.Chen Bailin,Zhao Hengle,Ma Yuzhou,et al.A preliminary discussion on genesis and structural control of Abei silver-lead deposit in Eastern Altun Mountains[J].Mineral Deposits,2012,31(1):13-26.
[17]王岩,邢树文,肖克炎.西昆仑—阿尔金Fe-Pb-Zn-Au-稀有金属成矿带成矿特征及资源潜力[J].地质学报,2016,90(7):1353-1363.Wang Yan,Xing Shuwen,Xiao Keyan.Metallgoenic features and resource potential of the west Kunlun to Altun Fe-Pb-Zn-Au-Rare Metals metallgoenic belt[J].Acta Geologlca Sinica,2016,90(7):1353-1363.
[18]李希良.新疆若羌县喀腊达坂铅锌矿床找矿模式[J].采矿技术,2014,14(4):93-97.Li Xiliang.Kaladaban lead-zinc deposit prospecting model of Ruoqiang County in Xinjiang[J].Mining Technology,2014,14(4):93-97.
[19]张理刚.稳定同位素在地质科学中的应用:金属活化热液成矿作用及找矿[M].西安:陕西科学技术出版社,1985.Zhang Ligang.Application of Stable Isotopes in Geological Sciences:Mineralization of Metal Activated Hydrothermal and Prospecting[M].Xi'an:Shaanxi Science and Technology Press,1985.
[20]吴才来,杨经绥,姚尚志,等.北阿尔金巴什考供盆地南缘花岗杂岩体特征及锆石SHRIMP定年[J].岩石学报,2005,21(3):846-858.Wu Cailai,Yang Jingsui,Yao Shangzhi,et al.Characteristics of the granitoid complex and its zincon SHRIMP dating at the south margin of the Bashikaogong Basin,North Altun,NW China[J].Acta Petrologica Sinica,2005,21(3):846-858.
[21]韩凤彬,陈柏林,崔玲玲,等.阿尔金山喀腊大湾地区中酸性侵入岩SHRIMP年龄及其意义[J].岩石学报,2012,28(7):2277-2291.Han Fengbin,Chen Bailin,Cui Lingling,et al.Zircon SHRIMP UPb age of intermediate-acid intrusive rocks in Kaladabawan area,Eastern Altun Mountains,NW China and its implications[J].Acta Petrologica Sinica,2012,28(7):2277-2291.
[22]韩吟文,马振东,张宏飞.地球化学[M].北京:地质出版社,2003.Han Yinwen,Ma Zhendong,Zhang Hongfei.Geochemistry[M]Beijing:Geological Publishing House,2003.