基于短波红外光谱技术在浅成低温热液型矿床中的成矿指示研究  

A study on metallogenic indication of epithermal deposit based on shortwave infrared spectroscopy

作　　者：李先初 张怀东[1] 华彬 张振 卢亮 LI Xianchu;ZHANG Huaidong;HUA Bin;ZHANG Zhen;LU Liang(No.313 Unit,Bureau of Geology and Mineral Exploration of Anhui Province,Lu'an,Anhui 237010,China;Boyi Mining Engineering Technology Consulting Co.,Ltd.,Tongling,Anhui 244000,China)

机构地区：[1]安徽省地质矿产勘查局313地质队,安徽六安237010 [2]铜陵市博益矿业工程技术咨询有限公司,安徽铜陵244000

出　　处：《安徽地质》2023年第2期133-138,共6页Geology of Anhui

基　　金：安徽省公益性地质工作项目“晓天-磨子潭火山岩盆地深部及外围金、铜矿调查评价”(编号:2022-g-10)资助。

摘　　要：晓天-磨子潭盆地产出一系列浅成低温热液型金矿床,而深部矿床工作研究程度较低,深部找矿未取得有效突破。本文在详细野外观察、地表采样等工作基础上,通过短波红外光谱分析技术,旨在揭示地表岩石矿物热液蚀变特征,为指示深部潜在隐伏矿床提供依据。初步研究成果表明:研究区蚀变矿物主要为铁镁绿泥石、云母族矿物、高岭石、方解石、铁白云石、绿帘石、铁电气石、黝帘石、钠云母伊利石;根据伊利石IC值、Dep1900 nm值变化特征,表明研究区西南地区为热液矿化中心,是下一步寻找斑岩型矿床工作的重点。A series of epithermal gold deposits occur in the Xiaotian-Mozitan basin.However,deep ore deposits have been less studied,and no effective breakthrough has been made in exploration of ore deposits at depth.On the basis of detailed field observation and surface sampling,this paper aims to reveal the hydrothermal alteration characteristics of surface rocks and minerals through short-wave infrared spectrum analysis technology,so as to provide a basis for unveiling ore deposits concealed at depth.The preliminary results show that the altered minerals in the study area are mainly brunsvigite,mica group,kaolinite,calcite,ferric dolomite,epidote,ferric tourmaline,zoisite and sodium mica illite.According to the variation characteristics of the IC value and Dep1900 nm value of illite,it is indicated that the southwestern part of the study area is the center of hydrothermal mineralization,which is the focus of follow-up search of porphyry deposits.

关 键 词：晓天-磨子潭盆地 浅成低温热液型金矿 短波红外光谱 

分 类 号：P631[天文地球—地质矿产勘探]