矿床地质2025，Vol.44Issue(3)：581-596,16.DOI:10.16111/j.0258-7106.2025.03.004
扬子地块西缘大红山铜铁矿床蚀变岩地球化学特征及找矿预测
Geochemical characterization of alteration rocks and prospecting prediction of Dahongshan copper-iron deposit at western margin of Yangtze block
摘要
Abstract
The Dahongshan copper-iron deposit is located within the Kangdian iron-copper polymetallic mineralization belt,situated on the southwestern edge of the Yangtze block.The deposit is distinctly stratigraphically controlled,exhibiting a layered and stratiform ore body.This article focuses on a 60 meter section of the deposit to investi-gate alteration lithology and mineralization mapping,analyze mineral combinations and their spatial zoning cha-racteristics,and develop a spatial zoning model for alteration and mineralization.Research findings indicate that the alteration of the wall rock in the Dahongshan copper-iron deposit is predominantly characterized by chloritiza-tion,silicification,carbonation,and mica alteration.The identified ore minerals include chalcopyrite,pyrite,and bornite.Results from R-type clustering analysis and factor analysis reveal that altered rocks primarily exhibit ele-ment combinations indicative of exhalative sedimentation and metamorphic superposition mineralization(Cu,Th,U),element combinations associated with magmatic hydrothermal superposition mineralization(V,Co,Ni,Ge),and element combinations linked to lead-zinc mineralization during the Late Yanshanian(Zn,Pb).Based on the comprehensive spatial zoning model of mineralization alteration and the geochemical anomaly characteristics of altered rocks,it is inferred that the deep ore body trends in a NW-SE direction,with a tendency towards the SW.Consequently,the deep edge exploration target area has been delineated.These research results hold significant implications for facilitating breakthroughs in the deep and peripheral exploration of the Dahongshan copper-iron deposit.关键词
蚀变地球化学/蚀变分带/元素组合/找矿预测/大红山铜铁矿床Key words
alteration geochemistry/alteration zonation/elemental combination/prospecting/Dahongshan copper-iron deposit分类
地质学引用本文复制引用
杨天赐,管申进,任涛,胡守东,侯文文,蔡佳锟,蒙六清,孙龙..扬子地块西缘大红山铜铁矿床蚀变岩地球化学特征及找矿预测[J].矿床地质,2025,44(3):581-596,16.基金项目
本文得到云南省重大科技专项计划项目"关键金属矿产资源集中区深部绿色勘查与安全开采"(编号:202202AG050014)资助 （编号:202202AG050014）
