湘南香花岭锡多金属矿田茶山矿床矿化空间分带及矿物学研究  

Mineralization zonation and mineralogy of the Chashan deposit in the Xianghualing Sn-polymetallic ore field,southern Hunan

作　　者：丁涛 刘建平[1,2] 何强[1,2] 邵拥军 郑旭 袁玲玲[1,2] 谢云[1,2] DING Tao;LIU Jianping;HE Qiang;SHAO Yongjun;ZHENG Xu;YUAN Lingling;XIE Yun(Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitor(Central South University),Ministry of Education,Changsha 410083,Hunan,China;School of Geoscience and InfoPhysics,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]有色金属成矿预测与地质环境监测教育部重点实验室(中南大学),湖南长沙410083 [2]中南大学地球科学与信息物理学院,湖南长沙410083

出　　处：《矿产勘查》2021年第11期2179-2191,共13页Mineral Exploration

基　　金：国家重点研发计划项目(2018YFC0603901);国家自然科学基金资助项目(41872091)联合资助。

摘　　要：茶山锡铅锌矿床是湘南香花岭矿田重要的矿床,垂向矿化空间分带明显,查明其矿化空间分带规律对深边部矿产勘查具有重要的实际意义。本文通过野外地质调查、显微鉴定及矿物电子探针等方法,开展了矿床垂向矿化分带与矿物学研究。结果显示茶山矿床矿体受北东向断裂带控制,矿体定位于断裂构造走向变化的引张部位,具有主干断裂富锡,次级断裂沉淀铅锌的规律。该矿床垂向分带特征显著,浅部发育铅锌矿石且以富集铅为特点,深部(海拔200 m以深)发育锡矿石。矿物组合上,铅锌矿体以石英-方解石-方铅矿-浅色闪锌矿为特点,颗粒较粗;锡矿体上部发育黑色闪锌矿-黄铁矿-(锡石)组合的含锡的铅锌矿石,下部以黄铜矿-磁黄铁矿-毒砂-锡石为组合的锡石硫化物矿石,底部局部见矽卡岩型磁铁矿-锡石-(毒砂)矿物组合。锡矿体中发育3个世代毒砂,由深到浅Sb、Zn含量逐渐增高。锡矿体和铅锌矿体中发育4个世代的闪锌矿,锡石硫化物矿石中闪锌矿(SpⅠ)和(SpⅡ)为富Fe、In、Cu的闪锌矿,而闪锌矿(SpⅢ)和(SpⅣ)为贫Fe、富Mn闪锌矿。综合矿床地质特征及矿相学研究,认为茶山锡铅锌矿床为岩浆热液成矿作用的产物,经历了2期4阶段的成矿过程,为岩浆热液高中温锡铅锌矿床。The Chashan tin-lead-zinc deposit with prominent vertical mineralization spatial zoning is an important deposit in Xianghualing ore field in southern Hunan.Revealing the mineralization spatial zoning style of the deposit is of great practical significance for deep mineral exploration.In this paper,the mineralization zone and mineralogical characteristics of the deposit are studied through by field geological survey,microscopic identification and mineral electron probe.The orebody is controlled by the NE-trending fault zone in the Chashan deposit.The location of the orebody is situated in the extension part of fault,in which tin orebodies in the main fault and lead-zinc in the secondary fault.Vertical,the lead-zinc ores are developed in the shallow,and tin ores is dominated in the deep(200 m above sea level).There are different among tin and lead-zinc orebodies in mineral assemblage.The lead-zinc orebodies are characterized by quartz-calcite-galena-light sphalerite with coarse particles.Tin bearing lead-zinc ores of the upper part of tin orebody contain black sphalerite-pyritecassiterite mineral assemblage.Cassiterite-sulfide ore of the lower part of tin orebody contain chalcopyritepyrrhotite-arsenopyrite-cassiterite mineral assemblage.Skarn type ore of the bottom part of tin orebody contain magnetite-cassiterite-arsenopyrite mineral assemblage.Three generations of arsenopyrite are developed in the tin orebodies,in which Sb and Zn contents gradually increase from deep to shallow.Four generations of sphalerite are developed in tin and lead-zinc orebodes.Sphalerite I and II in cassiterite sulfide ore are enriched Fe,In and Cu,while sphalerite III and IV are Fe poor and Mn rich.Based on geological characteristics and mineralogy,it is considered that the Chashan tin-lead-zinc deposit is the product of magmatic hydrothermal mineralization and has experienced two stages and four stages of metallogenic process.It is a high-medium temperature magmatic hydrothermal tin-lead-zinc deposit.

关 键 词：矿物化学 矿化空间分带 锡多金属矿床 茶山 香花岭矿田 湘南 

分 类 号：P612[天文地球—矿床学] P618.44[天文地球—地质学]