多源遥感卫星数据在脉状萤石矿床中的找矿预测应用:以内蒙古水头萤石矿床为例
Exploring Luorite Veins Using Multi-source Remote Sensing Astellite Data:A Case Study from the Shuitou Fluorite Deposit in Inner Mongolia,China
裴秋明 1沈家乐 2王世明 1房大任 3高永璋 4李典 5马少兵2
作者信息
- 1. 西南交通大学地球科学与工程学院,四川 成都 611756;四川省环青藏高原交通廊道地质灾害生态化防治工程技术研究中心,四川 成都 611756
- 2. 西南交通大学地球科学与工程学院,四川 成都 611756
- 3. 中国地质调查局地学文献中心,北京 100083
- 4. 中钢矿业开发有限公司,北京 100080
- 5. 成都理工大学地球与行星科学学院,四川 成都 610059
- 折叠
摘要
萤石是一种战略性非金属矿产,脉状萤石矿床是全球萤石产量的主要来源,应用遥感技术开展脉状萤石矿床的勘查找矿研究具有重要意义.笔者选择内蒙古中东部水头萤石矿床为研究区,在野外地质调查和前期研究的基础上,综合应用Landsat-8、ASTER、Sentinel-2和WorldView-2多源遥感影像进行成矿预测.首先,基于光谱协同理论将Landsat-8与WorldView-2融合生成协同数据,对研究区地层岩性和控矿构造进行遥感解译;利用Sentinel-2和ASTER影像进行了羟基、铁染和硅化蚀变信息提取.基于已知萤石矿点的遥感解译特征建立研究区萤石矿的遥感解译标志,在此基础上,应用GIS平台对提取特征信息进行加权叠加分析,开展研究区内萤石矿的综合预测.研究结果表明:Landsat-8与WorldView-2数据融合的假彩色合成影像可有效区分研究区萤石矿化点;由于脉状萤石矿体具有明显的垂向分带特征,在研究区地表露头中多发育硅质顶盖,因此硅化蚀变异常与羟基异常组合可作为萤石矿化的重要特征依据.GIS综合预测结果与已知矿点吻合度高,证实了应用多源遥感数据在脉状萤石矿床勘查找矿中的有效性,并预测了三处新的靶区,相关结果可为后续勘查部署提供依据,也可为其他地区的萤石遥感找矿勘查提供参考.
Abstract
Fluorite is a strategic nonmetallic mineral.Vein fluorite deposits represent the primary source of global fluorite production.The application of remote sensing technology to the exploration and mineral searches of vein-type fluorite deposits is of great significance.In this paper,the Shuitou fluorite deposit in the east-cen-tral part of Inner Mongolia is selected as the study area.Based on a comprehensive field geological survey and preliminary research,the authors apply a multi-source remote sensing approach using Landsat-8,ASTER,Sen-tinel-2,and WorldView-2 images to make mineralization predictions.First,spectral synergy theory was em-ployed to fuse Landsat-8 and WorldView-2 data,thereby generating synergistic data for remote sensing interpre-tation of stratigraphic lithology and ore-controlling tectonic information in the study area.Additionally,hydrox-yl,iron-stained,and silicified alteration information was extracted from Sentinel-2 and ASTER images.Based on the remote sensing interpretation features of known fluorite mining sites,a remote sensing interpretation flag of fluorite mining in the study area was established.This was then applied to the GIS platform,which was used to analyze the extracted feature information with weighted superposition and to carry out a comprehensive pre-diction of fluorite mining in the study area.The results demonstrate that the false-color composite image,which has been fused with data from both Landsat-8 and WorldView-2,is an effective tool for distinguishing fluorite mineralization points.In vein-type fluorite deposits,the ore body exhibits distinct vertical zonation,while in sur-face outcrops,more siliceous tops develop.The combination of silica and hydroxyl alteration anomalies can be used as the basis for identifying the key characteristics of fluorite mineralization.The results of this comprehen-sive GIS prediction and the known ore points align well,thereby corroborating the efficacy of the utilization of multisource remote sensing data in vein-type fluorite deposits for the purposes of exploration and the search for minerals,as well as the prediction of three new target areas.The results are suitable for use as a basis for subse-quent surveys and as a reference for the remote sensing of fluorite vein systems exploration in other areas.
关键词
遥感/萤石矿床/线性构造/热液蚀变/多源遥感数据/找矿预测Key words
remote sensing/fluorite deposits/linear structure/hydrothermal alteration/multisource remote sensing data/mineral resources exploration引用本文复制引用
基金项目
国家自然科学基金项目(42302104)
四川省自然科学基金面上项目(2022NSFSC0410)
自然资源情报跟踪与研究项目(DD20221794)
出版年
2024
国家科技期刊平台
NSTL
万方数据