摘要
沟里地区是青海东昆仑金及多金属成矿带重要组成部分之一,矿产资源丰富,具有良好的找矿前景,目前区内尚无大面积基于多源遥感卫星数据的线性构造识别及找矿应用方面的研究。选取Landsat8 OLI、GF-2不同空间分辨率遥感数据,运用最佳波段选择、主成分分析、图像融合、线性拉伸、定向滤波等遥感图像处理技术,结合DEM衍生产品和多元地学信息综合研究方法,实现了沟里地区线性构造识别和找矿预测。结果表明:(1)研究区构造格架以卡可特尔-色日德一线为界,可分为南部、北部2个区域,北部区域线性构造以NNE向最为发育,近EW向次之,NW、NE向分布较少,南部区域受昆中断裂带控制作用,线性构造主要发育近EW向和少量NW向、NE向;(2)已知矿床(点)全部位于线性构造内及其附近,构造控矿作用明显;(3)线性构造密集分布和交汇处以及遥感影像上不同色调连接区是寻找金矿化的有利地区。最后根据多元地学信息与遥感解译构造信息综合对比分析,在研究区圈定找矿靶区4处并进行了野外验证。研究结果表明,基于多源遥感卫星数据能够较好地识别地表构造空间结构特征,结果较为客观和准确,能够为该地区和外围找矿预测提供参考和依据。
[Objective]The Gouli area is one of the important gold and polymetallic belt in the East Kunlun Orogen.There is no research on lineament identification and mineral exploration based on multisource remote sensing data in the area.[Methods]In this paper,various enhancement techniques were employed on Landsat 8 OLI,GF-2 and DEM data to delineate structural lineaments.Meanwhile,information on geological,mineral and geochemical anomalies was combined to define prospecting targets in the Gouli area.[Results]The results show that(1)The tectonic framework of the study area can be divided into two regions by the boundary of Kaketeer-Seride.The lineament in the northern region is most developed in the NNE direction,followed by the near-EW direction,and less distributed in the NW and NE directions.The lineament in the southern region is mainly developed in the near-EW direction,and the NW to NE directions are less distributed.(2)The gold ore is controlled by lineaments.(3)The areas of densely distributed and intersected lineaments,as well as the areas connected by different colors on remote sensing images,are favorable locations for gold mineralization.Finally,based on the comprehensive analysis of multiple geological information and remote sensing interpreted tectonic information,four prospecting targets were identified in the study area and verified in the field.[Conclusion]This study proves that multisource remote sensing data can better identify the spatial structure characteristics of surface tectonics,which can provide a reference and basis for prospecting new deposits in the Gouli area.
作者
王晓云
井国正
李文君
何俊江
王艺龙
刘晓阳
谭俊
石文杰
WANG Xiaoyun;JING Guozheng;LI Wenjun;HE Junjiang;WANG Yilong;LIU Xiaoyang;TAN Jun;SHI Wenjie(The Third Nonferrous Geological Exploration Institute of Qinghai Province,Xining 810012,China;Geological Exploration Institute of Liaoning Province,Dalian Liaoning 116100,China;Liaoning Province High-Resolution Observation System Application and Service Center of Geological Resources and Environmental,Dalian Liaoning 116100,China;School of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《地质科技通报》
CAS
CSCD
北大核心
2024年第1期326-342,共17页
Bulletin of Geological Science and Technology
基金
青海省有色第三地质勘查院、青海省有色地质矿产勘查局和中国地质大学(武汉)联合科技攻关项目“青海省东昆仑东段金银多金属成矿系列研究与关键勘查技术应用示范项目”(青色地[2021]34号)。
关键词
GF-2
高分辨率
遥感
线性构造
沟里地区
找矿预测
GF-2
high spatial resolution
remote sensing
lineament
Gouli area
deposit prospecting
