投稿时间：2024-04-10
修订日期：2025-05-29
网络发布日期：2025-08-26
中文摘要:伊格莱西亚（Iglesia）地区位于阿根廷西北部圣胡安（San Juan）省北部地区，是南美安第斯成矿带的主要组成部分。区域内交通差、地形构造复杂，极大影响了地质找矿的进展，文章基于区域内典型的高硫浅成低温热液矿床——Veladero（贝拉德罗）Au-Ag矿床的特征，梳理了该区域已探明浅成低温热液矿床的空间分布规律，利用遥感技术，结合化探异常信息，划分成矿远景区。该地区存在两期成矿叠加，高硫型和低硫型浅成低温矿床在研究区东西两侧共生，具有较完整的斑岩-高硫、低硫型浅成低温热液型矿床结构，但是，区内目前仅探明了部分浅成低温热液矿床，找矿潜力仍巨大。文章以ETM+卫星影像为主的数据源解译出区域内成矿有利的地形地貌和“三角-环形-线型”成矿构造组合，基于ASTER遥感影像数据对研究区开展成像光谱法和主成分分析法的矿化蚀变异常信息提取，多光谱遥感技术提取的蚀变矿物组合异常区与区域内浅成低温热液矿床地质成矿有利区吻合，再结合水系沉积物地球化学异常和已探明矿山分布信息，建立该地区遥感地质找矿标志，最后，文章在研究区西侧圈划Z1-Z6高硫化浅成低温热液矿床找矿远景区；在东部的碳酸盐化-铁染（黄铁矿化和黄钾铁矾）区圈划Z7-Z9低硫化浅成低温热液矿床找矿远景区，对该地区的找矿调查工作具有重要的指导作用。
Abstract:The Iglesia region is located in the northern part of the San Juan Province in northwestern Argentina and is a major component of the South American Andean metallogenic belt. The poor infrastructure, complex relief and geologic structure in the region greatly affect the progress of geological exploration, based on the characteristics of the typical high sulfidation epithermal deposit—Veladero in the region, this paper untangles the spatial distribution characteristics of the discovered epithermal deposits in the region and summarizes the regional geological features of mineralization in the area. Two periods of mineralization overlap in the region, with high sulfidation and low sulfidation epithermal deposits coexisting on East and West sides of the study area, exhibiting a relatively complete mineralization system of porphyry, high sulfidation and low sulfidation epithermal deposits. It is believed that only a portion of epithermal deposits have been discovered in the region, and the potential for mineral exploration is still enormous. Using ETM+ satellite imagery as the main data source, the terrain and landforms favorable for mineralization in the region, as well as the "triangle-ring-lineament" mineralization structure combination, were interpreted. Based on ASTER remote sensing image data, imaging spectroscopy and principal component analysis were used to extract mineralization / alteration anomaly information in the study area. The alteration mineral combination anomaly areas extracted by multispectral remote sensing technology were consistent with the favorable areas for mineralization of epithermal deposits in the region. Combined with the geochemical anomalies of stream sediments sampling and the distribution information of known deposits in the region, the remote sensing geological prospecting indicators were established, and high prospective prospecting areas were divided, which has an important guiding role in mineral exploration and investigation work of the region.
keywords:multispectral remote sensing technology porphyry-high sulfidation and low sulfidation type Au-Ag ore epithermal deposit
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基金项目:本文得到中国地质调查局项目“美洲和大洋洲国际合作地质调查”（编号：DD20230129）项目资助
引用文本：
李汉武,徐鸣,郑璐,方针.2025.遥感技术在阿根廷伊格莱西亚地区浅成低温热液矿床找矿调查中的应用[J].矿床地质,44(4):888~904LI HanWu,XU Ming,ZHENG Lu,FANG Zhen.2025.Application of remote sensing technology in exploration and investigation of epithermal deposits in Iglesia region of Argentina[J].Mineral Deposits44(4):888~904
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