摘要
铁克里克铜铅锌多金属矿床位于中亚壳体塔里木地洼区,历经多期大地构造成矿阶段,是西昆仑地区库斯拉普成矿带上重要的铜铅锌矿床。在分析该矿床成矿地质条件的基础上,研究矿区流体包裹体以及硫、铅同位素组成特征,探讨成矿流体特征及成矿物质来源。矿区矿石硫样品δ^(34)(SCDT)值分布较宽(+8.2×10^(-3)^-7.6×10^(-3)),包裹体均一温度介于103~284℃,盐度介于0.18%~24.47%(NaCl),表明流体来源不是单一的,存在至少两种流体的混合。对各类型矿石铅同位素示踪研究表明:研究区矿石铅主要为壳幔混合的俯冲铅,主要成矿物质来源于赋矿围岩和下伏基底。研究认为,铁克里克矿床表现出多大地构造成矿阶段、多物质来源、多成矿作用等特点,为较典型的同生沉积-后期热液改造型多因复成矿床。
The Tiekelike copper-lead-zinc polymetallic deposit is located in Tarim Diwa region, Central Asian Crustobody. It has experienced several continental tectonic and metallogenic stages, and belongs to the significant copper-lead-zinc deposit in the Kusilapu mineralizing belt of West Kunlun. Based on analysis of the geologic settings of Tiekelike deposits, the fluid inclusions were systematically researched, the features of sulfur and lead isotopes were studied, and the characteristics of mineralization fluids and the sources of minerals were discussed. The results show that the δ^（34）（SCDT） values of ore minerals distribute widely（from ＋8.28×10^（-3） to-7.6×10^（-3））. The homogenization temperatures of the fluid inclusions vary from 103 ℃ to 284 ℃. The salinities range from 0.18% to 24.47%（mass fraction, Na Clequiv）. The features of fluid inclusions and sulfur isotopes indicate that the ore-forming fluids has several sources. According to the lead isotope tracer analysis, the conclusion is draw that the lead is mostly subducting lead mixed by crustal and mantle material, the major mineralizing material comes from ore-bearing host rocks and the underlain basement. The Tiekelike copper-lead-zinc polymetallic deposit is a typical syndepositional-hydrothermal transforming complex deposit, which is characterized by the multiple mineralizing continental structural stages, the multiple ore-forming material and the multiple mineralizations.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2016年第6期1293-1302,共10页
The Chinese Journal of Nonferrous Metals
基金
国家“十二五”科技支撑计划资助项目(2011BAB06B05-04)
中南大学“创新驱动项目”(2015CX008)~~
关键词
流体包裹体
硫铅同位素
多因复成矿床
铁克里克
fluid inclusions
sulfur and lead isotope
polygenetic compound deposit
Tiekelike
