投稿时间：2024-09-13
修订日期：2025-04-28
网络发布日期：2025-07-01
中文摘要:大红山铜铁矿床位于扬子地块西南缘的康滇铁铜多金属成矿带，矿床明显受地层控制，矿体呈层状、似层状产出。文章优选该矿床标高为60 m中段平面开展蚀变岩相-矿化填图研究，剖析矿物共生组合及其空间分带特征，构建蚀变-矿化空间分带模型。研究结果显示，大红山铜铁矿床围岩蚀变以绿泥石化、硅化、碳酸盐化、云母化为主，矿石矿物包括黄铜矿、黄铁矿、斑铜矿等。R型聚类分析和因子分析结果表明，蚀变岩主要表现为喷流沉积和变质叠加成矿的元素组合(Cu、Th、U)、岩浆热液叠加成矿的元素组合(V、Co、Ni、Ge)以及燕山（晚）期铅锌成矿的元素组合(Zn、Pb)。综合矿化-蚀变空间分带模式与蚀变岩地球化学异常特征，推断深部矿体走向呈NW向-SE向，倾向SW；在此基础上圈定了深边部找矿靶区。研究结果对指导大红山铜铁矿床深部和外围找矿突破具有重要意义。
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 investigate 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 chloritization, 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 element 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.
keywords:alteration geochemistry alteration zonation elemental combination prospecting Dahongshan copper-iron deposit
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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
引用文本：
杨天赐,管申进,任涛,胡守东,侯文文,蔡佳锟,蒙六清,孙龙.2025.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,44(3):581~596YANG TianCi,GUAN ShenJin,REN Tao,HU ShouDong,HOU WenWen,CAI JiaKun,MENG LiuQing,SUN Long.2025.Geochemical characterization of alteration rocks and prospecting prediction of Dahongshan copper-iron deposit at western margin of Yangtze block[J].Mineral Deposits44(3):581~596
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