大湖塘石门寺钨矿床碳、氧、硫同位素研究  

STUDY ON C-O-S ISOTOPES OF SHIMENSI TUNGSTEN DEPOSIT IN DAHUTANG

作　　者：阮昆[1] 潘家永[2] 曹豪杰 项新葵[3] 李钟枢 邵上[1] 伍俊杰[2] 

机构地区：[1]核工业二九〇研究所,广东韶关512026 [2]东华理工大学,放射性地质与勘探技术国防重点学科实验室,江西南昌330013 [3]江西省地质矿产勘查开发局九一六大队,江西九江332100

出　　处：《矿物岩石》2015年第1期57-62,共6页Mineralogy and Petrology

基　　金：国家自然科学基金项目(40963004,40972072);国家科技支撑计划项目(2011BAB04B02)

摘　　要：石门寺钨矿是大湖塘钨矿床的北矿段,位于我国下扬子成矿省之江南隆起东段成矿带西部,钦杭结合带的北侧。针对此细脉浸染型钨矿体中金属硫化物中的硫同位素和方解石中的碳、氧同位素进行了测定,结果显示细脉浸染型矿体中黄铜矿样品的δ34S值介于-2.6‰^-0.3‰之间,平均值为-1.31‰;辉钼矿样品的δ34S值介于-1.2‰~0.3‰之间,平均值为-0.53‰。矿体的硫主要来至深部岩浆或者上地幔。方解石δ13 CV-PDB值介于-11.42‰^-5.76‰之间,平均值为-7.06‰;δ18 OV-SMOW的变化范围为7.13‰~16.34‰,平均值为11.79‰,说明成矿流体中的碳主要来源于深部岩浆或者上地幔,并受到有机碳的混合。大湖塘石门寺钨矿段的成矿物质主要来源于大湖塘燕山期S型花岗岩岩浆,但不排除成矿流体在上升的过程中萃取了一部分围岩的成矿物质。Shimensi tungsten deposit is located in the west part of the east metallogenic belt of Jiangnan uplift in the Lower Yangtze metallogenic province and the north side of Qin-Hang Belt.In this paper,the sulfur isotope composition of metal sulfide and carbon and oxygen isotopic composition of calcite of veinlet disseminated ore body are presented.It shows that theδ34S of chalcopyrite of veinlet disseminated ore body is between-2.6‰ and-0.3‰ with average value of-1.31‰,and theδ34S of molybdenite between-1.2‰ and 0.3‰,average of-0.53‰.Sulfur mainly comes from deep magma or upper mantle.Theδ13CV-PDB of calcite is between-11.42‰and-5.76‰ with average value of-7.06‰ and itsδ18OV- SMOWis between 7.13‰ and 16.34‰with average value of 11.79‰,indicating that the carbon is mainly derived from the deep magma or the upper mantle with mixed organic carbon.It is suggested that the ore-forming material within the mining area mainly come from S type granitic magma during Yanshanian movement,and it is possible that the ore-forming materials extracted useful elements from the country rocks during the emplacement of magma.

关 键 词：硫同位素 碳 氧同位素 细脉浸染型矿体 大湖塘石门寺钨矿 

分 类 号：P597.2[天文地球—地球化学]