基于多源遥感技术的纳米比亚3602铀矿权区构造识别及控矿作用分析

Structure Identification and Ore-controlling Analysis of 3602 Uraniummining Rights in Namibia based on the Multi-source Remote Sensing Technology

遥感技术作为“数字地球”的关键技术之一,因其可发现和解决常规地质手段不易发现和解决的地质问题,在矿产资源勘查等领域得到广泛应用并取得众多研究成果。本文以“一带一路”沿线国家—非洲纳米比亚3602铀矿权区为研究区,基于多光谱ETM+和高分辨率QuickBird多源卫星遥感数据和信息提取技术,开展了构造识别和控矿作用分析。以影像线性特征识别为原则,以纹理的不连续性为主线,从岩层、构造、水系和地貌四方面构建了断裂构造遥感解译标志,从色调与图形、转折端和特殊水系三方面构建了褶皱构造遥感解译标志,并识别出了区内发育的主要断裂和褶皱构造。结合区内铀成矿特征和已知铀矿床(异常)分布,分析了断裂和褶皱构造对本区铀矿化产出的控制作用,提出了该区主要的铀矿找矿方向,为推动纳米比亚铀矿资源矿产勘查与开发提供了技术支撑。

As one of the key technologies of"digital earth",remote sensing technology has been widely used in mineral resources exploration and other fields because of its ability to discover and solve geological problems that are difficult to be discovered and solved by conventional geological methods,and it has achieved many research achievements.In this paper,taking the 3602 uranium mining rights of Namibia in Africawho is one of the countries along the"one Belt and one Road"as research area,structure identification and ore-controlling analysis were carried out based on the multi-spectral ETM+and high-resolution QuickBird data and information extractiontechnology.The interpretation marks of faults were constructed from the aspects of lay,structure,water systemand landform,and the interpretation marks of folds were constructed from the aspects of hue and graphics,turning ends,and special water systemsbased on the principle of image linear feature recognitionand the discontinuity of image texture.Furthermore,main fault and fold structures developed in the area were recognized.Combined with the uranium metallogenic characteristics and distribution of known uranium deposits and anomalous points,the paper analyzed the controlling effect of the fault and foldstructures on uranium mineralization in the research area,and proposed the main uranium prospecting direction.The results provided technical support for promoting the exploration and development of uranium resources in Namibia.