西藏斯弄多银多金属矿床岩石地球化学特征及找矿前景
|
摘要
西藏斯弄多银多金属矿床是在林子宗群陆相火山岩中发现的首例低硫型浅成低温热液型矿床,其独特的成因及成矿地质背景预示着在冈底斯南缘具有巨大找矿潜力。对矿区开展大比例尺岩石地球化学测量,研究该矿床成矿元素分带特征,结果显示:Pb、Zn、Cd、Ag、Au含量的变异系数和标准偏差均较大,表明该系列元素整体的富集强度和富集能力比较高;聚类分析显示Pb、Zn、Cd、Ag、Au具有极高的相关性,表明该组元素与成矿具有密切关系;单元素异常按累积频率达75%、95%和98.5%进行分级,最终圈定2个具有找矿潜力的异常区。基于上述岩石地球化学特征研究,以期为冈底斯成矿带找矿工作提供地球化学找矿方法指导。
The Sinongduo silver polymetallic deposit is the first low sulfidation epithermal deposit found in the Linzizong volcanic rocks.Its unique origin and metallogenic geological background indicate great prospecting potential of the south Gangdise metallogenic belt.The zoning characteristics of metallogenic elements were studied by means of large scale rock geochemical survey in the Sinongduo deposit. The large coefficient of variation and standard deviation of Pb,Zn,Cd,Ag and Au indicate the high enrichment and enrichment capability of these elements. Cluster analysis shows high correlation between Pb,Zn,Cd,Ag and Au which are considered to be the main mineralization elements. Element anomalies are classified according to the cumulative frequency of 75%,95% and 98.5% and 2 anomalies area are considered to have high prospecting potential. The authors are in the hope that the data obtained can provide a guide for the geochemical prospecting in the Gangdise metallogenic belt.
The Sinongduo silver polymetallic deposit is the first low sulfidation epithermal deposit found in the Linzizong volcanic rocks.Its unique origin and metallogenic geological background indicate great prospecting potential of the south Gangdise metallogenic belt.The zoning characteristics of metallogenic elements were studied by means of large scale rock geochemical survey in the Sinongduo deposit. The large coefficient of variation and standard deviation of Pb,Zn,Cd,Ag and Au indicate the high enrichment and enrichment capability of these elements. Cluster analysis shows high correlation between Pb,Zn,Cd,Ag and Au which are considered to be the main mineralization elements. Element anomalies are classified according to the cumulative frequency of 75%,95% and 98.5% and 2 anomalies area are considered to have high prospecting potential. The authors are in the hope that the data obtained can provide a guide for the geochemical prospecting in the Gangdise metallogenic belt.
引文
[1]Mo X X,Niu Y L,Dong G C,et al.Contribution of syncollisional felsic magmatism to continental crust growth:a case study of the paleogene Linzizong volcanic succession in southern Tibet[J].Chemical Geology,2008,250:49-67.
[2]Ding L,Kapp P,Zhong D L,et al.Cenozoic volcanism in Tibet:evidence for a transition from oceanic to continental subduction[J].Journal of Petrology,2003,44:1833-1865.
[3]刘鸿飞.拉萨地区林子宗群火山岩系的划分和时代归属[J].西藏地质,1993,2:15-24.Liu H F.Division of Linzizong volcanic series and its geochronology in Lhasa area[J].Xizang Geology,1993,2:59-69.
[4]董国臣,莫宣学,赵志丹,等.拉萨北部林周盆地林子宗火山岩层序新议[J].地质通报,2005,24(6):549-557.Dong G C,Mo X X,Zhao Z D,et al.A new understanding of the stratigraphic successions of the Linzizong volcanic rocks in the Lhunzhub basin,northern Lhasa,Tibet,China[J].Geological Bulletin of China,2005,24(6):549-557.
[5]唐菊兴,多吉,刘鸿飞,等.冈底斯成矿带东段矿床成矿系列及找矿突破的关键问题研究[J].地球学报,2012,33(4):393-410.Tang J X,Duo J,Liu H F,et al.Minerogenetic series of ore deposits in the east part of the Gangdise Metallogenic Belt[J].Acta Geoscientia Sinica,2012,33(4):393-410.
[6]唐菊兴,王登红,汪雄武,等.西藏甲玛铜多金属矿矿床地质特征及其矿床模型[J].地球学报,2010,31(4):495-506.Tang J X,Wang D H,Wang X W,et al.Geological features and metallogenic model of the Jiama copper-polymetallic deposit in Tibet[J].Acta Geoscientica Sinica,2010,31(4):495-506.
[7]Lang X H,Tang J X,Li Z J,et al.U-Pb and Re-Os geochronological evidence for the Jurassic porphyry metallogenic event of the Xiongcun district in the Gangdese porphyry copper belt,southern Tibet,PRC[J].Journal of Asian Earth Sciences,2014,79(2):608-622.
[8]Tang J X,Lang X H,Xie F W,et al.Geological characteristics and genesis of the Jurassic No.I porphyry Cu-Au deposit in the Xiongcun district,Gangdese porphyry copper belt,Tibet[J].Ore Geology Reviews,2015,70(4):438-456.
[9]杨宗耀,郎兴海,唐菊兴,等.西藏雄村铜金矿区侏罗系砂岩地球化学特征:对构造背景的约束[J].地质学报,2017,91(9):1985-2003.Yang Z Y,Lang X H,Tang J X,et al.Geochemical characteristics of the Jurassic sandstones in Xiongcun copper-gold deposit,Tibet:Constraints on tectonic setting[J].Acta Geologica Sinica,2017,91(9):1985-2003.
[10]唐菊兴,孙兴国,丁帅,等.西藏多龙矿集区发现浅成低温热液型铜(金银)矿床[J].地球学报,2014,35(1):6-10.Tang J X,Sun X G,Ding S,et al.Discovery of the epithermal deposit of Cu(Au-Ag)in the Duolong ore concentrating area,Tibet[J].Acta Geoscientica Sinica,2014,35(1):6-10.
[11]Lin B,Tang J X,Chen Y C,et al.Geology and geochronology of Naruo large porphyry-breccia Cu deposit in the Duolong district,Tibet[J].Gondwana Research,2019,66:168-182.
[12]唐菊兴,丁帅,孟展,等.西藏林子宗群火山岩中首次发现低硫化型浅成低温热液型矿床---以斯弄多银多金属矿为例[J].地球学报,2016,37(4):461-470.Tang J X,Ding S,Meng Z,et al.The first discovery of the low sulfidation epithermal deposit in Linzizong Volcanics,Tibet:Acase study of the Sinongduo Ag polymetallic deposit[J].Acta Geoscientica Sinica,2016,37(4):461-470.
[13]丁帅,陈毓川,唐菊兴,等.林子宗群火山岩与成矿关系:以斯弄多浅成低温热液型矿床为例[J].矿床地质,2017,36(5):1074-1092.Ding S,Chen Y C,Tang J X,et al.Relationship between Linzizong volcanic rocks and mineralization:A case study of Sinongduo epithermal Ag-Pb-Zn deposit[J].Mineral Deposits,2017,36(5):1074-1092.
[14]丁帅.西藏冈底斯成矿带斯弄多浅成低温热液型银铅锌矿床成岩与成矿作用研究[D].成都:成都理工大学,2017.Ding S.The diagenesis and metallogenesis in Sinongduo epithermal Ag-Pb-Zn deposit,Tibet[D].Chengdu:Chengdu University of Technology,2017.
[15]付燕刚,胡古月,唐菊兴,等.西藏斯弄多低硫化型浅成低温热液Ag-Pb-Zn矿床:Si-H-O同位素的示踪应用[J].地质学报,2017,91(4):836-848.Fu Y G,Hu G Y,Tang J X,et al.Low-sulfidation epithermal Ag-Pb-Zn deposit in Sinongduo,Tibet:Tracer application of Si-H-O stable isotope geochemistry[J].Acta Geologica Sinica,2017,91(4):836-848.
[16]付燕刚,胡古月,高一鸣,等.拉萨地块南木林盆地北缘中新世高锶低钇岩浆作用:锆石U-Pb年龄、Hf同位素和地球化学特征[J].地质论评,2017,63(3):643-658.Fu Y G,Hu G Y,Gao Y M,et al.Miocene Adakitic Magmatism Located at the Northern Part of Nanmuling Basin in Lhasa Block:Zircon U-Pb Age,Hf Isotope and Geochemical Characteristic[J].Geological Review,2017,63(3):643-658.
[17]李壮,郎兴海,丁帅,等.西藏斯弄多浅成低温热液型银铅锌矿床银的赋存状态研究[J].地球学报,2017,38(5):687-701.Li Z,Lang X H,Ding S,et al.A study of the modes of occurrence of silver in the Sinongduo epithermal Ag-Pb-Zn deposit,Tibet[J].Acta Geoscientica Sinica,2017,38(5):687-701.
[18]严己宽,玉强忠.地球化学勘查固体样品采集的野外质量评价指标[J].物探与化探,2018,42(6):1112-1115.Yan J K,Yu Q Z.The field quality evaluation index of solid sampling in geochemical exploration[J].Geophysical and Geochemical Exploration,2018,42(6):1112-1115.
[19]邵跃.热液矿床岩石测量(原生晕法)找矿[M].北京:地质出版社,1997.Shao Y.Rock survey(Primary Halo Method)for prospecting of hydrothermal deposits[M].Beijing:Geological Publishing House,1997.
[20]郎兴海,唐菊兴,杨宗耀,等.西藏自治区谢通门县斯弄多铅锌矿区地球物理特征及找矿方向[J].地质与勘探,2017,53(3):508-518.Lang X H,Tang J X,Yang Z Y,et al.Geophysical characteristics and prospecting direction of the Sinongduo Pb-Zn deposit in Xietongmen County,Tibet[J].Geology and Exploration,2017,53(3):508-518.
[2]Ding L,Kapp P,Zhong D L,et al.Cenozoic volcanism in Tibet:evidence for a transition from oceanic to continental subduction[J].Journal of Petrology,2003,44:1833-1865.
[3]刘鸿飞.拉萨地区林子宗群火山岩系的划分和时代归属[J].西藏地质,1993,2:15-24.Liu H F.Division of Linzizong volcanic series and its geochronology in Lhasa area[J].Xizang Geology,1993,2:59-69.
[4]董国臣,莫宣学,赵志丹,等.拉萨北部林周盆地林子宗火山岩层序新议[J].地质通报,2005,24(6):549-557.Dong G C,Mo X X,Zhao Z D,et al.A new understanding of the stratigraphic successions of the Linzizong volcanic rocks in the Lhunzhub basin,northern Lhasa,Tibet,China[J].Geological Bulletin of China,2005,24(6):549-557.
[5]唐菊兴,多吉,刘鸿飞,等.冈底斯成矿带东段矿床成矿系列及找矿突破的关键问题研究[J].地球学报,2012,33(4):393-410.Tang J X,Duo J,Liu H F,et al.Minerogenetic series of ore deposits in the east part of the Gangdise Metallogenic Belt[J].Acta Geoscientia Sinica,2012,33(4):393-410.
[6]唐菊兴,王登红,汪雄武,等.西藏甲玛铜多金属矿矿床地质特征及其矿床模型[J].地球学报,2010,31(4):495-506.Tang J X,Wang D H,Wang X W,et al.Geological features and metallogenic model of the Jiama copper-polymetallic deposit in Tibet[J].Acta Geoscientica Sinica,2010,31(4):495-506.
[7]Lang X H,Tang J X,Li Z J,et al.U-Pb and Re-Os geochronological evidence for the Jurassic porphyry metallogenic event of the Xiongcun district in the Gangdese porphyry copper belt,southern Tibet,PRC[J].Journal of Asian Earth Sciences,2014,79(2):608-622.
[8]Tang J X,Lang X H,Xie F W,et al.Geological characteristics and genesis of the Jurassic No.I porphyry Cu-Au deposit in the Xiongcun district,Gangdese porphyry copper belt,Tibet[J].Ore Geology Reviews,2015,70(4):438-456.
[9]杨宗耀,郎兴海,唐菊兴,等.西藏雄村铜金矿区侏罗系砂岩地球化学特征:对构造背景的约束[J].地质学报,2017,91(9):1985-2003.Yang Z Y,Lang X H,Tang J X,et al.Geochemical characteristics of the Jurassic sandstones in Xiongcun copper-gold deposit,Tibet:Constraints on tectonic setting[J].Acta Geologica Sinica,2017,91(9):1985-2003.
[10]唐菊兴,孙兴国,丁帅,等.西藏多龙矿集区发现浅成低温热液型铜(金银)矿床[J].地球学报,2014,35(1):6-10.Tang J X,Sun X G,Ding S,et al.Discovery of the epithermal deposit of Cu(Au-Ag)in the Duolong ore concentrating area,Tibet[J].Acta Geoscientica Sinica,2014,35(1):6-10.
[11]Lin B,Tang J X,Chen Y C,et al.Geology and geochronology of Naruo large porphyry-breccia Cu deposit in the Duolong district,Tibet[J].Gondwana Research,2019,66:168-182.
[12]唐菊兴,丁帅,孟展,等.西藏林子宗群火山岩中首次发现低硫化型浅成低温热液型矿床---以斯弄多银多金属矿为例[J].地球学报,2016,37(4):461-470.Tang J X,Ding S,Meng Z,et al.The first discovery of the low sulfidation epithermal deposit in Linzizong Volcanics,Tibet:Acase study of the Sinongduo Ag polymetallic deposit[J].Acta Geoscientica Sinica,2016,37(4):461-470.
[13]丁帅,陈毓川,唐菊兴,等.林子宗群火山岩与成矿关系:以斯弄多浅成低温热液型矿床为例[J].矿床地质,2017,36(5):1074-1092.Ding S,Chen Y C,Tang J X,et al.Relationship between Linzizong volcanic rocks and mineralization:A case study of Sinongduo epithermal Ag-Pb-Zn deposit[J].Mineral Deposits,2017,36(5):1074-1092.
[14]丁帅.西藏冈底斯成矿带斯弄多浅成低温热液型银铅锌矿床成岩与成矿作用研究[D].成都:成都理工大学,2017.Ding S.The diagenesis and metallogenesis in Sinongduo epithermal Ag-Pb-Zn deposit,Tibet[D].Chengdu:Chengdu University of Technology,2017.
[15]付燕刚,胡古月,唐菊兴,等.西藏斯弄多低硫化型浅成低温热液Ag-Pb-Zn矿床:Si-H-O同位素的示踪应用[J].地质学报,2017,91(4):836-848.Fu Y G,Hu G Y,Tang J X,et al.Low-sulfidation epithermal Ag-Pb-Zn deposit in Sinongduo,Tibet:Tracer application of Si-H-O stable isotope geochemistry[J].Acta Geologica Sinica,2017,91(4):836-848.
[16]付燕刚,胡古月,高一鸣,等.拉萨地块南木林盆地北缘中新世高锶低钇岩浆作用:锆石U-Pb年龄、Hf同位素和地球化学特征[J].地质论评,2017,63(3):643-658.Fu Y G,Hu G Y,Gao Y M,et al.Miocene Adakitic Magmatism Located at the Northern Part of Nanmuling Basin in Lhasa Block:Zircon U-Pb Age,Hf Isotope and Geochemical Characteristic[J].Geological Review,2017,63(3):643-658.
[17]李壮,郎兴海,丁帅,等.西藏斯弄多浅成低温热液型银铅锌矿床银的赋存状态研究[J].地球学报,2017,38(5):687-701.Li Z,Lang X H,Ding S,et al.A study of the modes of occurrence of silver in the Sinongduo epithermal Ag-Pb-Zn deposit,Tibet[J].Acta Geoscientica Sinica,2017,38(5):687-701.
[18]严己宽,玉强忠.地球化学勘查固体样品采集的野外质量评价指标[J].物探与化探,2018,42(6):1112-1115.Yan J K,Yu Q Z.The field quality evaluation index of solid sampling in geochemical exploration[J].Geophysical and Geochemical Exploration,2018,42(6):1112-1115.
[19]邵跃.热液矿床岩石测量(原生晕法)找矿[M].北京:地质出版社,1997.Shao Y.Rock survey(Primary Halo Method)for prospecting of hydrothermal deposits[M].Beijing:Geological Publishing House,1997.
[20]郎兴海,唐菊兴,杨宗耀,等.西藏自治区谢通门县斯弄多铅锌矿区地球物理特征及找矿方向[J].地质与勘探,2017,53(3):508-518.Lang X H,Tang J X,Yang Z Y,et al.Geophysical characteristics and prospecting direction of the Sinongduo Pb-Zn deposit in Xietongmen County,Tibet[J].Geology and Exploration,2017,53(3):508-518.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |