陕西略阳柳树坪金锌矿床地质特征及控矿因素研究
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摘要
陕西略阳柳树坪金锌矿床是"勉-略-宁"三角地带碳酸盐岩型矿床,通过野外调查与地质资料分析,对该矿床的地质特征、主要控矿地质因素、成矿条件等进行了研究。研究结果表明,柳树坪矿区成矿与地层、构造、岩浆岩等多重因素有关,其中震旦系断头崖组、九道拐组碳酸盐岩富含金、铅、锌等金属矿产,是该矿床的主要矿源层;印支—燕山期形成的沿九道拐向斜南北翼发育的构造破碎带基本控制了区内矿体的空间展布;同时燕山期中酸性浅成小岩体对金、锌、铅等元素活化、富集作用较强,为重要的控矿因素。综合分析认为柳树坪矿床为沉积层控-构造热液改造型金锌矿床,具有较好的金、锌等多金属矿产资源潜力。
The Liushuping gold and zinc ore deposits,located in Lueyang,Shannxi province,belongs to carbonate-type ore deposit in the " Mian-Lue-Ning " triangle zone. Through field investigation and analysis of geological data,the geological characteristics of ore deposit,the main ore-controlling geological factors and metallogenic conditions are studied. It shows that the mineralization is controlled by multiple factors of stratum,geologic structure and magmatite,and the ore bodies are hosted in Sinian carbonate of Duantouya formation and Jiudaoguai formation which are rich in gold,lead,zinc and other metals. The structural fracture zone developed along the north and south wings of Jiudaoguai syncline in the lndosinan-Yanshanian stage controls the spatial distribution of the ore bodies. The small intermediate-acid hypabyssal rock body in Yanshanian is also the important ore-controlling factor which has strong activating effect and enrichment on the elements such as gold,zinc and lead. We systematically summarize that the Liushuping gold and zinc deposit belongs to the sediment controlling-tectonic hydrothermal type,which has a good potential in polymetallic ore resources.
The Liushuping gold and zinc ore deposits,located in Lueyang,Shannxi province,belongs to carbonate-type ore deposit in the " Mian-Lue-Ning " triangle zone. Through field investigation and analysis of geological data,the geological characteristics of ore deposit,the main ore-controlling geological factors and metallogenic conditions are studied. It shows that the mineralization is controlled by multiple factors of stratum,geologic structure and magmatite,and the ore bodies are hosted in Sinian carbonate of Duantouya formation and Jiudaoguai formation which are rich in gold,lead,zinc and other metals. The structural fracture zone developed along the north and south wings of Jiudaoguai syncline in the lndosinan-Yanshanian stage controls the spatial distribution of the ore bodies. The small intermediate-acid hypabyssal rock body in Yanshanian is also the important ore-controlling factor which has strong activating effect and enrichment on the elements such as gold,zinc and lead. We systematically summarize that the Liushuping gold and zinc deposit belongs to the sediment controlling-tectonic hydrothermal type,which has a good potential in polymetallic ore resources.
引文
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[2]秦克令,何世平,宋述光.碧口地体同位素地质年代学及其意义[J].西北地质科学,1992,13(2):97~110.QIN Ke-ling,HE Shi-ping,SONG Shu-guang.Isotopic Geochronology and its Significancein Bikou Terrain,China[J].Northwest Geoscience,1992,13(2):97~110.
[3]张宗清,张国伟,唐索寒,等.鱼洞子群变质岩年龄及秦岭造山带太古宙基底[J].地质学报,2001,75(2):198~204.ZHANG Zong-qing,ZHANG Guo-wei,TANG Suo-han,et al.On The age of Metamorphic Rocks of the Yudongzi Group And the Archean Crystalline Basement of the Qingling orogen[J].Acta Geologica Sinica,2001,75(2):198~204.
[4]张欣,徐学义,宋公社,等.西秦岭略阳地区鱼洞子杂岩变形花岗岩LA-ICP-MS测年及地质意义[J].地质通报,2010,29(4):510~517.ZHANG Xin,XU Xue-yi,SONG Gong-she,et al.LA-ICP-MS U-Pb dating and significance of Yudongzi Group deformation granite from Lueyang area,western Qinling,China[J].Geological Bulletin of China,2010,29(4):510~517.
[5]张宗清,张国伟,付国民,等.秦岭变质地层年龄及其构造意义[J].中国科学:D辑,1996,26(3):216~222.ZHANG Zong-qing,ZHANG Guo-wei,FU Guo-min,et al.Geochronology of metamorphic strata in the Qinling Mountains and its tectonic implications[J].Science in China:Series D,1996,26(3):216~222.
[6]张宗清,张国伟,唐索寒.南秦岭变质地层同位素年代学[M].北京:地质出版社,2002.ZHANG Zong-qing,ZHANG Guo-wei,TANG Suo-han,et al.The metamorphic stratigraphy geochronology of the south of Qinling[M].Beijing:Geological Publishing House.2002.
[7]闫全人,王宗起,闫臻,等.碧口群火山岩的时代——SHRIMP锆石U-Pb测年结果[J].地质通报,2003,22(6):456~458.YAN Quan-ren,WANG Zong-qi,YAN Zhen,et al.SHRIMP age of Bikou volcanic rocks[J].Geological Bulletin of China,2003,22(6):456~458.
[8]赖绍聪,李永飞,秦江锋.碧口群西段董家河蛇绿岩地球化学及LA-ICP-MS锆石U-Pb定年[J].中国科学:D辑,2007,37(增刊):262~270.LAI Shao-cong,LI Yong-fei,QIN Jiang-feng.Geochemistry and LA-ICP-MS zircon U-Pb dating of the Dongjiahe ophiolite complex from the western Bikou terrane[J].Science in China:Series D,2007,37(Suppl.):262~270.
[9]陕西省地质局第二地质队.陕西省略阳县九道拐矿区预查地质报告[R].1984.The Second Team of Shaanxi Provincial Geology and Mineral Bureau.The Geological pre-investigation report of Jiudaoguai arer in lveyang,Shaanxi[R].1984.
[10]陕西省地质局第二地质队.陕西省略阳县柳树坪一带金矿普查地质报告[R].2013.The Second Team of Shaanxi Provincial Geology and Mineral Bureau.The geological survey report of Liushuping arer in Lueyang,Shaanxi[R].2013.
[11]曾佐勋,赖旭龙,胡以铿,等.陕甘川邻接区复合造山带与成矿[M].武汉:中国地质大学出版社,2004:1~175.ZENG Zuo-xun,LAI Xu-long,HU Yi-keng,et al.Composite orogenic belt and metallization in adjoing area of Sichuan Gansu and Shaanxi province[M].Wuhan:China university of Geosciences press,2004:1~175.
[12]钱建平.碳酸盐岩系层滑断裂控矿和成矿[J].矿物学报,2013,33(S2):485~486.QIAN Jian-ping.Ore controling and mineralization of intertayer-glide fault in the carbonate system[J].Journal of mineral,2013,33(S2):485~486.
[13]陕西省地质局.陕西省汉中市1∶5万茶店地区区调报告[R].1980.Bureau of Geology and Mineral Resources of Shaanxi Province.The report of 1∶50000 geological map of Cha dian county in Hanzhong,Shaanxi[R].1980.
[14]姜修道,魏刚锋,张梦平,等.陕西略阳煎茶岭金矿床成矿作用探讨[J].现代地质,2012,26(1):61~70.JIANG Xiu-dao,WEI Gang-feng,ZHANG Meng-ping,et al.Discussion on the Formation of Jianchaling Gold Depost in lveyang,Shaanxi Province[J].Geoscience,2012,26(1):61~70.
[15]任文清,周鼎武,刘方杰,等.勉略宁三角地区构造演化与金属矿产成矿特征[J].西北地质科学,1999,20(2):63~70.REN Wen-qing,ZHOU Ding-wu,LIU Fang-jie,et al.Regional tectonic evolution and features of metal mineral resources of Mian Lue Ning triangle area[J].Northwestern Geoscience,1999,20(2):63~70.
[16]任文清.陕西勉略宁三角地区地质构造特征、演化与成矿作用关系探讨[D].兰州:西北大学,2001:1~77.REN Wen-qing.Notes on the relationship between geological-tectonic characteristics,evolution and mineralization in Mian Lue Ning triangle areas of Shaanxi province[D].Northwest University,2001:1~77.
[17]王根宝,崔继岗,张升全,等.陕西勉略宁三角区基本地质组成及演化[J].西北地质科学,1996,(2):11~17.WANG Gen-bao,CUI Ji-gnag,ZHANG sheng-quan,et al.Basic geological composition and evolution of the Mian Lue Ning,Shaanxi[J].Northwestern Geoscience,1996,(2):11~17.
[18]徐学义,陈隽璐,张二朋,等.1∶50万秦岭及邻区地质图说明书[M].西安:西安地图出版社,2014.XU Xue-yi,CHEN Jun-lu,ZHANG Er-peng,et al.The specification of 1∶500000 geological map of Qinling Mountains and adjacent areas[M].Xi’an:Xi’an Map Publishing House,2014.