文献类型：期刊文献

中文题名：滇西腾冲-梁河锡矿带典型锡矿床硫同位素地球化学特征

英文题名：Sulfur Isotope Geochemical Characteristics of a Typical Tin Deposits in Tengchong-Lianghe Tin Belt, West Yunnan Province, China

作者：陈晓翠 赵成海 张敏 杨梧

第一作者：陈晓翠

机构：[1]贵州理工学院;[2]中国科学院地球化学研究所

第一机构：贵州理工学院

年份：2017

卷号：37

期号：6

起止页码：705-711

中文期刊名：矿物学报

外文期刊名：Acta Mineralogica Sinica

收录：北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家自然科学基金项目(批准号:4160020815);贵州理工学院高层次人才启动项目(XJGC20161229)

语种：中文

中文关键词：硫同位素;腾冲-梁河锡矿带;成矿流体;花岗岩

外文关键词：S isotope; Tengchong--Lianghe tin belt; ore-forming fluid; granite

摘要：滇西腾冲-梁河锡矿带是三江特提斯成矿域重要的锡多金属成矿区,目前已发现具有代表性的大型锡矿床2个:古近纪的梁河来利山锡矿床和晚白垩纪的腾冲小龙河锡矿床。对这2个矿床主成矿阶段形成的黄铁矿样品进行了硫同位素测定,结果表明来利山锡矿床黄铁矿的δ^(34)SCDT值为+4.9‰^+6.7‰,平均值+5.5‰(n=10);小龙河锡矿床δ^(34)SCDT值为+5.0‰^+8.1‰,平均值+6.3‰(n=32)。两个锡矿床的δ^(34)SCDT值与矿区花岗岩的δ^(34)SCDT值(0^+5.7‰)范围基本一致,暗示这2个矿床的成矿流体中的硫均主要来自花岗岩浆。结合已有研究资料,认为腾冲-梁河锡矿带这两个典型锡矿床与矿区花岗岩具有同时性,其成矿流体均主要源自各矿区花岗岩浆的分异演化,花岗岩浆还为锡矿化提供了部分Sn成矿物质,小龙河和来利山锡矿床的锡成矿作用与花岗岩浆活动具有密切的联系,属于花岗岩岩浆热液矿床。
Tengchong–Lianghe tin belt in western Yunnan Province is one of the most important tin mineralization belts in Sanjiang Tethyan metallogenic domain. There are two typical large-scale tin deposits in this belt： Early Teriary Lianghe Lailishan tin deposit and Late Cretaceous Tengchong Xiaolonghe tin deposit. In this study, pyrite samples from the main mineralization stage of the two deposits were selected to analyze S isotopes. The δ^34 SCDT values of Lailishan and Xiaolonghe tin deposit range from ＋4.9‰-＋6.7‰（average value at ＋5.5‰） and ＋5.0‰-＋8.1‰（average value of ＋6.3‰）, respectively. These data imply that sulphur of the two deposits were mainly derived from magmatic hydrothermal fluids. Combined with previous available data, it＇s suggested that the tin mineralization events in Tengchong-Lianghe tin belt are conspicuously contemporaneous with the emplacement of the granites. The granitic magmatism may partly provide ore-forming materials and fluids for tin mineralization of these tin deposits, strongly supporting granite-related origin of these tin deposits.