地球学报2026，Vol.47Issue(2)：235-248,14.DOI:10.3975/cagsb.2026.020301
义敦弧北段首次发现大型中硫化型浅成低温热液富金银铅锌铜矿床
The First Discovery of a Large Intermediate-sulfidation Epithermal Au-Ag-Pb-Zn-Cu Deposit in the Northern Segment of the Yidun Arc
摘要
Abstract
The Xia'nanggou deposit is a newly discovered Au-Ag-Pb-Zn-Cu mineralization system in the northern segment of the Yidun Arc(SW China).Based on integrated field mapping,drill core logging,petrographic observations,and shortwave infrared(SWIR)spectral analysis,we documented its geological characteristics,ore control,and genetic type.Orebodies occur as steep,tabular to pipe-like shoots hosted by Upper Triassic Mengge Formation tuffs and are jointly controlled by NW-trending faults and a concealed phreatomagmatic breccia pipe.The ore textures include veinlet-stockwork-disseminated,brecciated,and massive styles.The principal sulfide assemblages are sphalerite,galena,chalcopyrite,tetrahedrite,and tennantite.The alteration is well-zoned,with an inner silicification-sericitization core grading outward to a sericite-argillic zone and a distal propylitic halo,and the dominant alteration minerals are quartz-carbonate-muscovite-illite.A vertical metal zonation was observed from Pb-Zn in the shallow levels to Cu-Pb-Zn at intermediate depths and Cu(with elevated Au and Ag)at depth.Collectively,these features indicate an intermediate sulfidation epithermal system.This discovery expands the recognized deposit spectrum of the northern Yidun Arc and suggests a potential for porphyry-epithermal metallogenic systems within Late Triassic volcanic sequences.关键词
夏囊沟/富金银铅锌铜矿/中硫化型/浅成低温热液矿床/隐爆角砾岩/义敦弧Key words
Xia'nanggou/Au-Ag-Pb-Zn-Cu deposit/intermediate-sulfidation/epithermal deposit/phreatomagmatic breccia/Yidun Arc分类
天文与地球科学引用本文复制引用
冉凤琴,赵媛,代涌坤,王思睿,韩警锐,孙崇波,高学震,刘严松,鲁军,柳维君,张博,彭勃,王国富,邓辉,杨洪伟,田欢欢,杨彦宏..义敦弧北段首次发现大型中硫化型浅成低温热液富金银铅锌铜矿床[J].地球学报,2026,47(2):235-248,14.基金项目
本文由杭州越昌科技有限公司"四川白玉县夏囊沟铅锌矿控矿因素及找矿潜力研究"项目(编号:AH2025-0483)和四川省科技厅"川西可尔因锂矿田矿物地球化学-高光谱勘查建模"项目(编号:2026NSFSC1144)联合资助. This study was supported by Hangzhou Yuechang Technology Co.,Ltd.(No.AH2025-0483),and Science and Technology Department of Sichuan Province(No.2026NSFSC1144). （编号:AH2025-0483）
