摘要
内蒙古特尼格尔图铅锌矿床地处大兴安岭南段,为黄岗-甘珠尔庙成矿带内一典型的矽卡岩型矿床。矿床产于黄岗梁组地层中,热液成矿作用可归纳为两期5阶段。流体包裹体研究表明矽卡岩期成矿流体发育3种类型包裹体,分别为含Na Cl子矿物包裹体(SL型)、气液两相型包裹体(VL型)及富气-液相包裹体(LV型);石英-硫化物期成矿流体发育VL型及LV型。H、O同位素地球化学分析结果表明,矽卡岩期δDV-SMOW值为-114.5×10^(-3)^-109.8×10^(-3),δ^(18)O_(H_2O)值为2.6×10^(-3)~3.8×10^(-3);石英-硫化物期石英及方解石矿物的δD_(V-SMOW)值为-140.2×10^(-3)^-120.7×10^(-3),δ^(18)O_(H_2O)值为和-11.4×10^(-3)^-0.5×10^(-3),代表特尼格尔图铅锌矿床成矿作用是岩浆水为主导的成矿流体贯穿矽卡岩期及石英-硫化物期,并在石英-硫化物成矿期混入了大气降水。黄铁矿、闪锌矿及方铅矿的硫化物的δ^(34)S_(V-CDT)值变化范围为0.7×10^(-3)~4.8×10^(-3),平均为2.01×10^(-3),表明区内成矿物质具有深源特点。
Tenige ertu lead-zinc deposit is located in the southern Great Xing an Range,which is a typical skarn deposit in Huanggang-Ganzhuermiao metallogenic belt.The deposit occurred in Huanggangliang Formation,and the hydrothermal ore-forming process can be divided into two periods and five stages.Fluid inclusion study indicates that there existed three types of inclusions in the skarn period ore-forming fluids,including SL,VL and LV types,whereas the ore-forming fluids of quartz-sulfide period have two types of inclusion,including VL and LV types.The H and O isotopes studies indicate that theδD V-SMOW andδ18 O H 2O values in skarn period are-114.5×10-3 to-109.8×10-3 and 2.6×10-3 to 3.8×10-3,respectively,and are-140.2×10-3 to-120.7×10-3 and-11.4×10-3 to-0.5×10-3,respectively in quartz-sulfide period,from quartz and calcite.This suggests that the ore-forming fluids in skarn period are mainly magmatic water,while those in quartz-sulfide period have a mixed magmatic-meteoric origin.Theδ34 S V-CDT values of pyrites,sphalerites and galenas are 0.7×10-3 to 4.8×10-3(mean=2.01×10-3),indicating a deep source.
作者
范思文
樊金虎
孙立秋
王可勇
王一存
FAN Si-wen;FAN Jin-hu;SUN Li-qiu;WANG Ke-yong;WANG Yi-cun(College of Earth Sciences,Jilin University,Changchun 130061,China;The Fifth Geological Group Limited Liability Company of Liaoning Province,Dashiqiao 115100,Liaoning,China;College of Resources,Hebei University of Geosciences,Shijiazhuang 050031,China)
出处
《世界地质》
CAS
2020年第4期826-837,共12页
World Geology
基金
内蒙古山金地质矿产勘查有限公司科研项目(SJDK-KY2017-5)
中国地质调查局中国科学技术部项目(2017YFC0601304)资助。
关键词
特尼格尔图铅锌矿床
地质特征
矿床成因
内蒙古
Tenige ertu lead-zinc deposit
geological characteristics
genesis
Inner Mongolia
