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现代地质 ›› 2024, Vol. 38 ›› Issue (04): 1076-1091.DOI: 10.19657/j.geoscience.1000-8527.2023.112

• 构造物理化学控矿机理与找矿应用 • 上一篇    下一篇

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

韩燿徽1,2(), 王翠芝1(), 吴志杰2, 吕古贤3, 张宝林4, 张启鹏5   

  1. 1.福州大学紫金地质与矿业学院,福建 福州 350108
    2.龙岩学院资源工程学院,福建 龙岩 364012
    3.中国地质科学院地质力学研究所,北京 100081
    4.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
    5.内蒙古矿业开发有限责任公司,内蒙古 呼和浩特 010020
  • 出版日期:2024-08-10 发布日期:2024-10-16
  • 通信作者: 王翠芝,女,博士,教授,1965年出生,主要从事矿床成矿规律与成矿预测、成因矿物学与找矿矿物学以及矿产开发利用研究。Email:wcuizhi@163.com
  • 作者简介:韩燿徽,男,硕士研究生,1994年出生,主要从事区域地质与矿山地质工程工作。Email: 1624509970@qq.com
  • 基金资助:
    内蒙古自治区地质勘查基金管理中心科研项目“内蒙古自治区赤峰市柴胡栏子地区典型矿田构造岩相测量与成矿规律研究”([2019]科研-02);校企合作项目“绢云母红外光谱特征的制约因素研究”(BM-2019-08)

Remote Sensing Geological Interpretation, Alteration Information Extraction, and Mineral Prospecting Prediction in the Chaihulanzi Gold Field, Chifeng, Inner Mongolia

HAN Yaohui1,2(), WANG Cuizhi1(), WU Zhijie2, LÜ Guxian3, ZHANG Baolin4, ZHANG Qipeng5   

  1. 1. Zijin School of Geology and Mining, Fuzhou University, Fuzhou,Fujian 350108,China
    2. Department of Resources Engineering, Longyan University, Longyan, Fujian 364012,China
    3. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081,China
    4. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences,Beijing 100029,China
    5. Inner Mongolia Mining Development Co., Ltd., Huhhot, Inner Mongolia 010020, China
  • Published:2024-08-10 Online:2024-10-16

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Landsat 8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。

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

Abstract:

The Chaihulanzi gold field, situated at the northwesternmost end of the Chifeng-Chaoyang gold metallogenic belt, is an significant gold-producing region in China.However, this region faces harsh natural conditions 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 interpretation 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 Landsat 8 and Sentinel-2A remote sensing images.The scheme involves removing interference information, extracting 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 information 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 requirements for medium-scale prospecting prediction and comprehensive geological surveys, significantly enhancing prospecting efficiency.The research results provide crucial fundamental guidance for future prospecting and exploration in the Chaihulanzi gold ore field.

Key words: Chaihulanzi gold ore field, multi-source remote sensing satellite imagery, remote sensing interpretation, alteration information extraction, principal component analysis, ore prospecting prediction

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