地质与勘探2025，Vol.61Issue(2)：256-267,12.DOI:10.12134/j.dzykt.2025.02.004
江西德兴矿集区遥感蚀变异常信息提取及找矿指示意义
The Extraction of Remote Sensing Alteration Anomalies and Its Prospecting Indication in the Dexing Ore Concentration area in Jiangxi Province
摘要
Abstract
In recent years,with the continuous advancement of domestic and international earth-observation technologies,remote sensing technology has emerged as a crucial tool in geological surveys and mineral resource exploration.The satellite-based remote sensing technology enables the rapid acquisition of large-scale alteration anomaly information,which will aid to subsequent regional mineral exploration endeavors.This study focuses on the Dexing ore concentration area and its surrounding areas in Jiangxi Province.Based on Landsat-8 OLI multispectral data and GF-5 AHSI hyperspectral data,remote sensing alteration anomalies were extracted for the ore concentration area and its surrounding regions.We analyzed the distribution characteristics of alteration anomalies in the area,and delineated favorable metallogenic sections.Through principal component analysis(PCA)on Landsat-8 OLI data,iron-stained and hydroxyl alteration anomalies were extracted.The mixed-tuned matched filtering(MTMF)method was applied to GF-5 AHSI data to extract alteration minerals such as mica,carbonate,and chlorite.By integrating geological data from the Dexing ore concentration area,the distribution of alteration anomalies extracted from the two types of remote sensing data was compared and analyzed,revealing typical alteration zoning characteristics of a porphyry metallogenic system in the region.Specifically,the alteration zones transition from a phyllic zone in the center to a propylitic zone towards the periphery.Based on this,two favorable prospecting sections were delineated,which were located north of the Dexing porphyry copper deposit and southeast of the Yinshan deposit.Field verification confirmed that these two sections exhibited large-scale iron-stained alteration anomalies.Surface rock samples collected in the area indicate widespread sericitization and chloritization in the shallow metamorphic rock series of the Shuangqiaoshan Group,primarily composed of phyllite,which corresponds well with the alteration anomaly extraction results from satellite remote sensing data.The findings suggest significant potential for further exploration of porphyry-type deposits in the region,providing important remote sensing evidence for subsequent prospecting and exploration efforts.关键词
蚀变矿物/Landsat-8/GF-5/高光谱/斑岩铜矿/德兴矿集区/江西Key words
alteration minerals/Landsat-8/GF-5/hyperspectral/porphyry copper deposit/Dexing ore concentration area/Jiangxi Province分类
天文与地球科学引用本文复制引用
冯依琳,郑忠超,王旭东,华嵘辉,代晶晶,廖小武,黄鸿新..江西德兴矿集区遥感蚀变异常信息提取及找矿指示意义[J].地质与勘探,2025,61(2):256-267,12.基金项目
江西省科学技术厅"科技+地质"联合计划项目"江西铜矿资源预测与找矿突破技术研究"(编号:2023KDG01001)、国家自然科学基金面上项目(编号:42172332)和中国地质科学院基本科研业务费专项经费(编号:JKYZD202405)联合资助. （编号:2023KDG01001）
