滩间山地区青龙沟金矿床成矿条件及模式
|
摘要
青龙沟金矿床位于柴达木盆地北缘赛什腾山-阿尔茨托山造山亚带,是青海省柴北缘成矿带最具找矿潜力的矿床。分析和研究滩间山地区青龙沟金矿床成矿条件及模式,对于在该区进行进一步找矿工作和寻找构造热液蚀变型矿床具有重要的指导和借鉴意义。为研究青龙沟金矿床成矿条件及模式,笔者首先收集了青龙沟金矿床大地构造背景、地层、构造、岩浆岩等方面的资料,对青龙沟金矿床特征分别进行了描述;然后从地层、岩浆岩、构造等3个方面对成矿条件进行了系统的分析和总结,认为青龙沟金矿床具有沉积变质变形,岩浆热液成矿作用的先后富集、叠加等特点,其成因应属岩浆期后热液型和构造蚀变岩型金矿床。其成矿模式经历了:(1)早期黑色含金岩系沉积期。(2)金元素初步富集期。(3)金矿化富集期。(4)金矿化叠加富集期。该研究对于该区进一步深部找矿工作和寻找构造热液蚀变型矿床具有借鉴意义,有一定的参考价值。
The Qinglonggou gold deposit is located in Saisitengshan-Aerzituoshan orogenic subzone of Nort Qaidam,which has most prospecting potential in the North Qaidam metallogenic belt of Qinghai Province.The ore-forming condition and the model of this gold deposit have been analyzed and studied in this paper,which has important guidance and reference significance for prospecting the structural-hydrothermal alteration type deposits and other further ore-prospecting works in this area.In this paper,the geotectonic background,regional strata,lithology,structure,magmatic rocks and other information about the Qinglonggou gold deposit have been collected,and then the geological characteristics of this deposit has been described.Finally,from the aspects of strata,magmatic rocks and tectonic,the metallogenic conditions of this deposit have been systematically analyzed and summarized.The results show that this deposit has experienced the sedimentary metamorphic deformation,showing the enrichment and superposition characteristics of magmatic hydrothermal mineralization.Thus,this deposit belongs to postmag-matic hydrothermal type and tectonic altered rock type gold deposit.The ore-forming process was experienced three periods,that is(1)sedimentary period of black gold-bearing rock series in early stage,(2)initial enrichment period of gold element,(3) enrichment period of gold mineralization and(4) superimposed enrichment period of gold mineralization.This study has a reference value for further ore-prospecting works and prospecting the structural-hydrothermal alteration type deposits and other in this area.
The Qinglonggou gold deposit is located in Saisitengshan-Aerzituoshan orogenic subzone of Nort Qaidam,which has most prospecting potential in the North Qaidam metallogenic belt of Qinghai Province.The ore-forming condition and the model of this gold deposit have been analyzed and studied in this paper,which has important guidance and reference significance for prospecting the structural-hydrothermal alteration type deposits and other further ore-prospecting works in this area.In this paper,the geotectonic background,regional strata,lithology,structure,magmatic rocks and other information about the Qinglonggou gold deposit have been collected,and then the geological characteristics of this deposit has been described.Finally,from the aspects of strata,magmatic rocks and tectonic,the metallogenic conditions of this deposit have been systematically analyzed and summarized.The results show that this deposit has experienced the sedimentary metamorphic deformation,showing the enrichment and superposition characteristics of magmatic hydrothermal mineralization.Thus,this deposit belongs to postmag-matic hydrothermal type and tectonic altered rock type gold deposit.The ore-forming process was experienced three periods,that is(1)sedimentary period of black gold-bearing rock series in early stage,(2)initial enrichment period of gold element,(3) enrichment period of gold mineralization and(4) superimposed enrichment period of gold mineralization.This study has a reference value for further ore-prospecting works and prospecting the structural-hydrothermal alteration type deposits and other in this area.
引文
张雪亭,穆一青,王维,等.青海省矿产资源开发与利用战略[J].青海国土经略,2009,(06):29-33.ZHANG Xueting,MU Yiqing,WANG Wei,et al.The strategy of[J].Qinghai Land and Mineral Resources Development and Utilization in Qinghai Province,2009,(06):29-33.
陈正乐,周显强,宋友贵.青海都兰沙柳河南区多金属矿床的控矿构造特征[J].地质力学学报,1997,02:84-86.CHEN Zhengle,ZHOU Xianqiang,SONG Yougui.The characteristics of ore controlling structure[J].Journal of Geomechanics Polymetallic Deposit in Qinghai Dulan Henan District of Salix,1997,02:84-86.
张雪亭,杨生德,杨站君,等.1∶1000000青海省大地构造图及其说明书[M].北京:地质出版社,2007:12-20.ZHANG Xueting,YANG Shengde,YANG Zhanjun,etc.1:1million Qinghai Geotectonic Map and Description[M].Beijing:Geological Publishing House,2007:12-20.
徐耀鉴,徐汉南,任锦刚,等.岩石学[M].北京:地质出版社,2007:31-41.XU Yaojian,XU Hannan,REN Jingang,et al.Petrology course[M].Beijing:Geological Publishing House,2007:31-41.
姜洪成,马永铨.青海省沙柳河南区有色金属矿床的成矿物理化学条件研究[J].青海地质,1993,02:17-31.JIANG Hongcheng,MA Yongquan.Nonferrous metal deposit in Qinghai Province shaliuhenanqu metallogenic physical chemical condition[J].Qinghai Geological,1993,02:17-31.
孙少财,王伟.青海省察汗乌苏-乌龙滩地区成矿远景评价[J].化工矿产地质,2013,03:162-168.SUN Shaocai,WANG Wei.Qinghai Province-Chahanwusu Oolong beach area of ore prospecting evaluation of[J].Chemical Mineral Geology,2013,03:162-168.
周显强,宋友贵,邓军,等.青海都兰地区控矿构造特征研究[J].地质力学学报,1996,(01):34-41.ZHOU Xianqiang,SONG Yougui,DENG Jun,et al.Study on the characteristics of ore control structure in Dulan area of Qinghai[J].Journal of Geomechanics,1996,(01):34-41.
丁正江,孙丰月,李碧乐,等.青海省苦海汞(金)矿床地质特征及找矿前景分析[J].地质与勘探,2010,46(02):198-206.DING Zhengjiang,SUN Fengyue,LI Bile,et al.Qinghai province Kuhai mercury(gold)geological characteristics and prospecting of ore deposit[J].Geology and Exploration,2010,46(02):198-206.
丰成友,张德全,贾群子,等.柴达木周缘金属矿床成因类型、成矿规律与成矿系列[J].西北地质,2012,45(01):1-8.FENG Chengyou,ZHANG Dequan,JIA Qunzi,et al.Genetic types,metallogenic regularity and metallogenic series of the Qaidam metal deposit[J].Northwestern Geology,2012,45(01):1-8.
许荣科,郑有业,周宾,等.柴北缘绿梁山一带与造山作用相关的铜铅锌矿床成矿规律及找矿启示[J].西北地质,2012,45(01):192-201.XU Rongke,ZHENG Youye,ZHOU Bin,et al.Metallogenic regularity and prospecting inspiration of copper lead zinc deposit related to orogenic action in green Liangshan area on the northern margin of Qaidam[J].Northwest Geology,2012,45(01):192-201.
陈正乐,周显强,宋友贵.青海都兰沙柳河南区多金属矿床的控矿构造特征[J].地质力学学报,1997,02:84-86.CHEN Zhengle,ZHOU Xianqiang,SONG Yougui.The characteristics of ore controlling structure[J].Journal of Geomechanics Polymetallic Deposit in Qinghai Dulan Henan District of Salix,1997,02:84-86.
张雪亭,杨生德,杨站君,等.1∶1000000青海省大地构造图及其说明书[M].北京:地质出版社,2007:12-20.ZHANG Xueting,YANG Shengde,YANG Zhanjun,etc.1:1million Qinghai Geotectonic Map and Description[M].Beijing:Geological Publishing House,2007:12-20.
徐耀鉴,徐汉南,任锦刚,等.岩石学[M].北京:地质出版社,2007:31-41.XU Yaojian,XU Hannan,REN Jingang,et al.Petrology course[M].Beijing:Geological Publishing House,2007:31-41.
姜洪成,马永铨.青海省沙柳河南区有色金属矿床的成矿物理化学条件研究[J].青海地质,1993,02:17-31.JIANG Hongcheng,MA Yongquan.Nonferrous metal deposit in Qinghai Province shaliuhenanqu metallogenic physical chemical condition[J].Qinghai Geological,1993,02:17-31.
孙少财,王伟.青海省察汗乌苏-乌龙滩地区成矿远景评价[J].化工矿产地质,2013,03:162-168.SUN Shaocai,WANG Wei.Qinghai Province-Chahanwusu Oolong beach area of ore prospecting evaluation of[J].Chemical Mineral Geology,2013,03:162-168.
周显强,宋友贵,邓军,等.青海都兰地区控矿构造特征研究[J].地质力学学报,1996,(01):34-41.ZHOU Xianqiang,SONG Yougui,DENG Jun,et al.Study on the characteristics of ore control structure in Dulan area of Qinghai[J].Journal of Geomechanics,1996,(01):34-41.
丁正江,孙丰月,李碧乐,等.青海省苦海汞(金)矿床地质特征及找矿前景分析[J].地质与勘探,2010,46(02):198-206.DING Zhengjiang,SUN Fengyue,LI Bile,et al.Qinghai province Kuhai mercury(gold)geological characteristics and prospecting of ore deposit[J].Geology and Exploration,2010,46(02):198-206.
丰成友,张德全,贾群子,等.柴达木周缘金属矿床成因类型、成矿规律与成矿系列[J].西北地质,2012,45(01):1-8.FENG Chengyou,ZHANG Dequan,JIA Qunzi,et al.Genetic types,metallogenic regularity and metallogenic series of the Qaidam metal deposit[J].Northwestern Geology,2012,45(01):1-8.
许荣科,郑有业,周宾,等.柴北缘绿梁山一带与造山作用相关的铜铅锌矿床成矿规律及找矿启示[J].西北地质,2012,45(01):192-201.XU Rongke,ZHENG Youye,ZHOU Bin,et al.Metallogenic regularity and prospecting inspiration of copper lead zinc deposit related to orogenic action in green Liangshan area on the northern margin of Qaidam[J].Northwest Geology,2012,45(01):192-201.