阿尔金阿卡腾能山红沟子铜金矿成矿地质条件及找矿远景分析  

Metallogenic Conditions and Prospecting Potential of Honggouzi Copper-Gold Deposit in Akatenneng Mountain,Altun Metallogenic Belt

作　　者：任国升 李建龙 李定武 李豪 张国鹏 靳杨 REN Guosheng;LI Jianlong;LI Dingwu;LI Hao;ZHANG Guopeng;JIN Yang(Qinghai Nonferrous First Geological Exploration Institute,Xining,Qinghai 810000,China;Key Laboratory of Hidden Mineral Exploration in Qinghai Province,Xining,Qinghai 810001,China;Qinghai Nonferrous Geological and Mineral Exploration Bureau,Xining,Qinghai 810001,China)

机构地区：[1]青海省有色第一地质勘查院,青海西宁810000 [2]青海省隐伏矿勘查重点实验室,青海西宁810001 [3]青海省有色地质矿产勘查局,青海西宁810001

出　　处：《中国锰业》2025年第1期42-49,共8页China Manganese Industry

基　　金：青海省省级地质勘查项目(编码:[2013]257号)。

摘　　要：阿尔金成矿带作为我国西北部重要的金属成矿区域,其铜金矿床的勘查潜力尚未充分揭示,主要受限于复杂的地质构造演化和低勘查程度。针对阿卡腾能山红沟子地区,通过解析寒武-奥陶系滩间山群安山岩的构造及岩浆活动,明确铜、金矿的成矿规律与勘查方向。基于1∶1万地质填图、岩石地球化学剖面及激电异常数据,结合矿化蚀变带特征,系统研究了北西向断裂构造、岩浆热液活动与成矿元素富集的关系。结果显示:①区内圈定5条北西向矿化蚀变带,发现11条铜矿体(最大厚度4.29 m,平均Cu品位0.28%~1.63%)及2条金矿化体(品位0.21~0.50 g/t)。②激电异常WJⅡ与WJⅢ分别长1.4 km和1.8 km,与构造破碎带和辉长岩体高度吻合。③岩石化学异常AP1显示Ag、Co、Cu、W综合异常面积达0.16 km 2,指示深部矽卡岩型富矿潜力。研究表明,红沟子铜、金矿受北西向断裂与加里东期岩浆活动联合控制,热液交代-充填作用主导成矿。研究证实区内寒武-奥陶系安山岩为重要矿源层,Fs3、Fs4蚀变带西侧及深部矽卡岩接触带为优先勘探靶区。成果为阿尔金成矿带资源增储提供了科学依据。The Altun metallogenic belt,a pivotal Cu-Au province in northwestern China,remains underexplored due to complex tectonic evolution and limited geological investigation.This study focuses on the Honggouzi Cu-Au deposit within the Cambrian-Ordovician Tanjianshan Group andesites in Akatenneng Mountain.Integrating 1∶10000 geological mapping,petrochemical profiling,and IP anomaly data,we systematically analyzed the interplay between NW-trending faults,Caledonian magmatism,and ore enrichment.Key results include:①Five NW-striking mineralization-alteration zones host 11 Cu ore bodies(max.thickness 4.29 m,avg.grade 0.28-1.63%Cu)and 2 Au-mineralized zones(0.21-0.50 g/t).②High-amplitude IP anomalies(WJⅡ:1.4 km;WJⅢ:1.8 km)correlate with fault breccias and gabbroic intrusions.③The AP1 geochemical anomaly(0.16 km 2)with Ag-Co-Cu-W enrichment signals potential skarn-type mineralization at depth.The deposit is controlled by conjugate NW faults and hydrothermal metasomatism linked to Caledonian magmatic events.Priority targets include the western flanks of Fs3/Fs4 alteration zones and deep skarn contacts.This work establishes a genetic model for structurally-controlled hydrothermal deposits in the Altun belt,guiding future exploration.

关 键 词：阿尔金成矿带 红沟子 铜金矿 成矿地质 找矿潜力 

分 类 号：P618.41[天文地球—矿床学] P618.51[天文地球—地质学]