矿床地质2025，Vol.44Issue(3)：677-695,19.DOI:10.16111/j.0258-7106.2025.03.009
湖南观音堂锑矿床地质、地化异常特征及找矿远景分析
Geological and geochemical anomaly characteristics and prospecting potential analysis of Guanyintang antimony deposit in Hunan Province
摘要
Abstract
The Guanyintang antimony deposit is located within the Xuefeng Arc Structural Belt.All past exploration work has focused exclusively on NE-trending ore veins,while studies on the newly identified NWW-trending vein remain completely unstudied.This study aims to elucidate geological characteristics and ore-controlling fac-tors of the deposit based on new emerging geological evidence,advance the understanding of metallogenic regu-larity,establish an integrated prospecting model,and guide antimony exploration in deep extensions and pe-ripheral zones of the mining area.This investigation systematically conducted field surveys on stratigraphy,structures,and ore body characteristics within the study area,performed multi-element geochemical analysis of mineralization-related elements,and comprehensively integrated results to determine their prospecting signifi-cance.Research indicates that the host strata of the Guanyintang antimony deposit are primarily composed of thick-bedded chert from the Sinian Liuchapo Formation,with subordinate dolostone at the base of the Jinjia-dong Formation.The ore mineralization is dominated by stibnite,associated with wall-rock alterations including bleaching,silicification,carbonatization,and graphitization.Distribution of antimony orebodies is rigorously controlled by superimposed folding and faulting structures.The axial zones and periclines of broad,gentle NE-trending anticlines,along with NE-striking and NWW-striking fracture systems,constitute the principal hosting spaces.Within the mining area,distinct enrichment of Sb and Zn in the Liuchapo Formation siliceous rocks,as well as As,Sb,Pb,and Zn in the Jinjiadong Formation,has been identified.Sb exhibits strong geochemical consanguinity with Cd and Zn,jointly constituting the primary indicator suite.Four integrated geochemical anomalies(AS-1 to AS-4)have been delineated in soil surveys based on elemental associations.An integrated exploration model for the Guanyintang antimony deposit has been established,characterized by mineralization in siliceous rocks and dolomite,structural control through anticlinal axes superimposed by NE/NWW-trending faults,and Sb-high anomalies as the primary geochemical indicator.The results demonstrate that the Guanyin-tang antimony deposit represents a typical fissure-filling type mineralization predominantly hosted in Sinian si-liceous rocks.The superimposition of folds and faults-particularly multiphase fault systems-provides critical guidance for Sb exploration,with dilational structural voids exhibiting unexpectedly high mineralization poten-tial.The Sb-Cd-Zn pathfinder elemental association serves as a robust indicator for antimony prospecting.Addi-tionally,the Liuxikeng area(northeast)and Peijichong anticline(southeast)constitute high-priority exploration targets.关键词
构造控矿/地化异常/找矿模型/找矿远景/雪峰弧形构造带Key words
structural control of mineralization/geochemical anomaly characteristics/prospecting model/ore-prospecting potential/Xuefeng arc structural belt分类
地质学引用本文复制引用
章志明,陈澍民,刘家军,黎长洲,韦少港,王明兴,吴金虹..湖南观音堂锑矿床地质、地化异常特征及找矿远景分析[J].矿床地质,2025,44(3):677-695,19.基金项目
本文得到中国地质调查局项目"湖南云台山地区1∶5万矿产地质调查"(编号:ZD20220308)、"湘东北平江-醴陵重点地区金多金属矿产资源调查评价"(编号:DD20230206511)和湖南省溆浦县大和矿业有限公司"湖南省溆浦县观音堂矿区锑矿勘查"联合资助 （编号:ZD20220308）
