东天山康古尔金矿成矿晚阶段地幔流体参与成矿作用的碳氢氧同位素证据  

C, O and H Isotopic Evidences for Mantle Fluids Involved in the Late Ore-Forming Stage of the Kanggur Gold Deposit in Eastern Tianshan Mountains

作　　者：王志良[1] 毛景文[1] 吴淦国[2] 杨建民[1] 韩春明[3] 马天林[4] 张作衡[1] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]中国地质大学,北京100083 [3]中国科学院高能物理研究所,北京100039 [4]中国地质科学院地质力学研究所,北京100081

出　　处：《地质学报》2004年第2期195-202,共8页Acta Geologica Sinica

基　　金：国土资源大调查项目(编号200310200001-3和DKD9902001);国家重点基础研究项目(编号G1999043216)

摘　　要：康古尔金矿位于塔里木板块北部被动大陆边缘阿奇山-雅满苏裂谷带之北侧,是一个典型的韧性剪切带型(造山型)金矿,成矿作用表现为含金石英脉和石英碳酸盐脉两个阶段。本文对矿石中的碳酸盐脉和矿床周围地层中的碳酸盐岩进行了C、H、O同位素测试。通过研究初步认为:矿床周围地层石炭纪干墩组和雅满苏组中大理岩的C、O同位素组成与世界上其他地区的海相碳酸盐基本相同,以富^(13)C和^(18)O为特征,明显有别于矿石中碳酸盐脉;后者的C、H、O同位素组成与地幔多相体系中的原始碳酸岩基本相似,暗示在康古尔金矿成矿晚阶段有地幔流体参与成矿作用。The Kanggur gold deposit, located in northern Aqishan—Yamansu rift zone, northern Tarim plate, is a typical ductile shear zone (orogenic) gold deposit. Its mineralization consists of gold-bearing quartz vein stage and quartz-carbonate vein stage. In this paper, C, H and O isotopes of the carbonate minerals from gold ores and C and O isotopes of the marbles from the lower Carboniferous Yamansu Formation and Gandun Formations were determined. The analytical results show that C and O isotopes of the marbles are featured with 13C and 18O in abundance, almost identical to those of marine carbonate rocks from many areas in the world and different from those of the carbonate minerals from gold ores; and C, H and O isotopes of the carbonate minerals from gold ores approximate to those of carbonatites in the mantle multiphase system, implying mantle fluids involved in the late ore-forming stage (quartz-carbonate vein stage) in the Kanggur gold deposit.

关 键 词：地幔流体 成矿作用 金矿 碳氢氧同位素 

分 类 号：P618.51[天文地球—矿床学] P597[天文地球—地质学]