内蒙古赤峰柴胡栏子金矿田遥感地质解译和蚀变信息提取与找矿预测
Remote Sensing Geological Interpretation,Alteration Information Extraction,and Mineral Prospecting Prediction in the Chaihulanzi Gold Field,Chifeng,Inner Mongolia
韩燿徽 1王翠芝 2吴志杰 3吕古贤 4张宝林 5张启鹏6
作者信息
- 1. 福州大学紫金地质与矿业学院,福建福州 350108;龙岩学院资源工程学院,福建龙岩 364012
- 2. 福州大学紫金地质与矿业学院,福建福州 350108
- 3. 龙岩学院资源工程学院,福建龙岩 364012
- 4. 中国地质科学院地质力学研究所,北京 100081
- 5. 中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京 100029
- 6. 内蒙古矿业开发有限责任公司,内蒙古呼和浩特 010020
- 折叠
摘要
内蒙古柴胡栏子金矿田位于赤峰—朝阳金成矿带的最西北侧,是我国重要的黄金产地,但其自然条件恶劣,遥感地质研究程度较低,对于最主要的控矿因素(地层、构造、岩浆岩)分布特征以及与本区金成矿相关的围岩蚀变信息研究相对较少,利用遥感技术对该矿田进行找矿勘查具有重要意义.本文利用Landsat8和GF-2遥感影像,结合"主成分分析+最佳指数因子"的方法组合,对柴胡栏子金矿田进行遥感地质解译.根据蚀变矿物的波谱特征,设计去除干扰信息-异常信息提取-异常分级-异常信息处理的蚀变信息提取方案,对Landsat 8和Sentinel-2A遥感影像进行蚀变信息提取;在前人区域地质、矿田地质研究的基础上,依据蚀变信息特征,结合地质解译成果圈定3个找矿靶区.研究表明,利用多源遥感卫星影像对研究区进行地质解译与蚀变信息提取,基本能够满足辅助中比例尺找矿预测及地质综合调查的需要,并提升找矿效率.研究成果对柴胡栏子金矿田未来找矿勘查具有基础性指导意义.
Abstract
The Chaihulanzi gold field,situated at the northwesternmost end of the Chifeng-Chaoyang gold metal-logenic belt,is an significant gold-producing region in China.However,this region faces harsh natural condi-tions and has seen limited geological studies using remote sensing.Research on the distribution characteristics of key ore-controlling factors(e.g.,strata,structures,and igneous rocks)and alterations of host rocks related to gold mineralization remains relatively scarce.Therefore,utilizing remote sensing technology for prospecting in this ore field is of great significance.This paper uses Landsat 8 and GF-2 remote sensing images,along with the"Principal Component Analysis+Optimal Index Factor"method,to perform remote sensing geological inter-pretation of the Chaihulanzi gold ore field in Songshan District,Chifeng City,Inner Mongolia.Based on the spectral characteristics of altered minerals,a scheme was developed to extract alteration information from Land-sat 8 and Sentinel-2A remote sensing images.The scheme involves removing interference information,extrac-ting anomaly information,grading anomalies,and processing anomaly data.Three prospecting target areas were delineated based on previous regional geological and mining studies,integrating characteristics of alteration in-formation with geological interpretation results.This study shows that using multi-source remote sensing satellite images for geological interpretation and extracting alteration information in the study area generally meets the re-quirements for medium-scale prospecting prediction and comprehensive geological surveys,significantly enhan-cing prospecting efficiency.The research results provide crucial fundamental guidance for future prospecting and exploration in the Chaihulanzi gold ore field.
关键词
柴胡栏子金矿田/多源遥感卫星影像/遥感解译/蚀变信息提取/主成分分析/找矿预测Key words
Chaihulanzi gold ore field/multi-source remote sensing satellite imagery/remote sensing interpre-tation/alteration information extraction/principal component analysis/ore prospecting prediction引用本文复制引用
基金项目
内蒙古自治区地质勘查基金管理中心科研项目([2019]科研-02)
校企合作项目(BM-2019-08)
出版年
2024
国家科技期刊平台
NSTL
万方数据