文献类型：期刊文献

英文题名：He, Ar, and S isotopic constraints on the relationship between A-type granites and tin mineralization: A case study of tin deposits in the Tengchong-Lianghe tin belt, southwest China

作者：Chen, Xiao-Cui Zhao, Cheng-Hai Zhu, Jing-Jing Wang, Xin-Song Cui, Tao

第一作者：陈晓翠

通信作者：Chen, XC[1]|[144407dd10cbfbc5998c2]陈晓翠;[14440bebcb7e5f9c421f9]陈晓翠;

机构：[1]Guizhou Inst Technol, Guiyang 550003, Guizhou, Peoples R China;[2]Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550005, Guizhou, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Resource & Environm Engn, 1 Caiguan Rd, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2018

卷号：92

起止页码：416-429

外文期刊名：ORE GEOLOGY REVIEWS

收录：;EI(收录号：20175004524286);Scopus(收录号：2-s2.0-85037342157);WOS:【SCI-EXPANDED(收录号:WOS:000424185700025)】；

基金：This work was financially supported by The National Natural Science Foundation of China - China (4160020815); the 12th Five-Year Plan Project of the State Key Laboratory of Ore Deposit Geochemistry, Chinese Academy of Sciences - China (SKLODG-ZY125-03); the Startup Projects for High-level Talents of the Guizhou Institute of Technology - China (XJGC20161229); the Joint Fund of the Science and Technology Department of Guizhou Province - China (LH[2014]7358); and the Startup Projects of High-level Talents of Guizhou Institute of Technology - China (XJGC20131204). Yunnan Tin Industry Co. Ltd. is gratefully acknowledged for their kind help during field work.

语种：英文

外文关键词：Tengchong-Lianghe tin belt; He, Ar and S isotopes; Ore-forming fluids; A-type granite

摘要：The Tengchong-Lianghe tin belt in western Yunnan Province, southwest China, is the most important tin mineralization belt in the Sanjiang Tethyan Metallogenic Domain (STMD). There are two large tin deposits in this belt: the Paleogene Lailishan and the Late Cretaceous Xiaolonghe deposits. The two deposits are spatially and temporally associated with the Lailishan and Xiaolonghe granitic plutons, respectively. Recent studies suggest that the Lailishan and Xiaolonghe granitic plutons exhibit most of the mineralogical and geochemical characteristics of A-type granites. In this study, we discuss the He, Ar, and S isotopes of pyrite samples from the two large tin deposits to trace ore-forming fluids and elements. We also review the relationship between A-type granites and tin deposits from a new perspective. The delta S-34(CDT) values of the Lailishan tin deposit range from +4.9 parts per thousand to + 6.7 parts per thousand, with an average value of +5.53 parts per thousand. The delta S-34(CDT), values of the Xiaolonghe tin deposit range from + 5.0 parts per thousand to +8.1 parts per thousand, with an average value of +6.33 parts per thousand. These values are slightly higher than those of the granites (0 parts per thousand to + 5.7 parts per thousand) in the Tengchong-Lianghe area, indicating mainly magmatic sources for the sulfur of ore-forming fluids with a small amount of S from the wall rocks. The Lailishan tin deposit has He-3/He-4 values of 1.57-3.46 Ra, with an average value of 2.078 Ra, and Ar-40/Ar-36 values of 382.00-622.99, with an average value of 459.67. The Xiaolonghe tin deposit has He-3/He-4 values of 0.53-0.88 Ra, with an average value of 0.686 Ra, and Ar-40/Ar-36 values of 301.06-348.43, with an average value of 322.04. These values suggest that ore-forming fluids of the Lailishan and Xiaolonghe tin deposits have mixed crustal, mantle, and a small volume of meteoric water sources in different proportions. The mantle He-4 values and He-3/He-4 values of the Lailihsan tin deposit (26-44%, 1.57-3.46 Ra) are markedly higher than those of the Xiaolonghe tin deposit (8-15%, 0.53-0.88 Ra), implying increased crust-mantle interaction in the Paleogene relative to the Late Cretaceous in western Yunnan. This interaction may be attributed to the upwelling of the asthenosphere through the break-off of the Neo-Tethyan slab during the main collisional period (65-41 Ma) of India-Asia.