山东蒙阴地区金刚石遥感找矿模型的构建与应用  

Construction and Application of Remote Sensing Ore-prospecting Model for Diamonds in Mengyin Area of Shandong,China

作　　者：褚志远 温殿刚 吕青 耿新霞[3] 姚佛军[3] 杨建民[3] CHU Zhi-yuan;WEN Dian-gang;LYU Qing;GENG Xin-xia;YAO Fo-jun;YANG Jian-min(The 7th Institute of Geology&Mineral Exploration of Shandong Province,Linyi 276006,Shandong,China;Key Laboratory of Diamond Mineralization Mechanism and Exploration,Shandong Provincial Bureau of Geology&Mineral Resources,Linyi 276006,Shandong,China;MNR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]山东省第七地质矿产勘查院,山东临沂276006 [2]山东省地质矿产勘查开发局金刚石成矿机理与探测重点实验室,山东临沂276006 [3]中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室,北京100037

出　　处：《地球科学与环境学报》2024年第2期240-251,共12页Journal of Earth Sciences and Environment

基　　金：山东省第七地质矿产勘查院科技创新项目(DKQY202002);山东省自然科学基金项目(ZR2021MD052);中国地质调查局地质调查项目(DD20230305)。

摘　　要：随着遥感传感器多样化及遥感数据处理技术的深入,遥感技术的原位、快速、有效等特点使其成为矿产勘查的重要技术手段。以山东蒙阴地区西峪金伯利岩带金刚石矿床为研究对象,对红旗矿区的金伯利岩体(岩脉)及围岩样品进行短波红外光谱测试,分析其光谱特征及蚀变矿物组成。红旗矿区样品在1391、1912、2318、2393 nm等波长处有吸收谷,这为ASTER遥感数据提取蚀变异常信息提供波谱依据,据此可分类型提取镁羟基异常、铝羟基异常、铁染异常信息。利用PALSAR雷达遥感数据、WorldView-2高分辨率遥感数据对研究区进行构造、岩性、水系解译,得出金伯利岩分布在NE向与NW向构造交汇部位,通过水系解译排除因冲刷沉积引起的假蚀变遥感异常,通过岩性增强界定岩性差异的边界,进而构建金伯利岩带金刚石矿床的遥感找矿模型,将找矿模型应用于矿区外围的找矿预测,叠加地质、化探、重砂等多元信息,在筛选后的遥感异常图上圈定了6个找矿靶区,为金刚石找矿和矿产资源评价提供依据。With the diversification of remote sensing sensors and the improvement of remote sensing data processing,the in-situ,fast,and effective characteristics of remote sensing technology make it an important technical means for mineral exploration.Remote sensing ore-prospecting model is used to construct the prospecting information and geological prospecting by remote sensing data,which is widely used in mineral resources exploration,but seldom applied in diamond deposits.Diamond deposit of Xiyu kimberlite belt in Mengyin area of Shandong,was taken as a case study,and the samples of kimberlite body(vein)in Hongqi minning area were tested by short-wave infrared spectroscopy,the composition and spectral characteristics of altered minerals were analyzed.The results show that there are absorption valley at the wavelength 1391,1912,2318 and 2393 nm in Hongqi mining area.The principal component analysis(PCA)is used to extract alteration information from ASTER remote sensing data,according to the characteristics of alteration minerals.So the abnormal information of magnesium hydroxyl,aluminum hydroxyl and iron staining from ASTER remote sensing data is extracted.The structure,lithology and water system are interpreted by using PALSAR radar remote sensing data and WorldView-2 high-resolution remote sensing data.Kimberlite is distributed at the intersection of northeast and northwest structures.False alteration remote sensing anomalies caused by erosion and sedimentation through water system could be excluded.Boundaries of lithological differences could be tighten through remote sensing lithological enhancement.By the comprehensive analysis of alteration information,structures,regional geology,geochemical and heavy sand anomaly,etc.,the ore-prospecting model is constructed and six exploration targets are figured out,which provide a basis for diamond prospecting and mineral resources evaluation.

关 键 词：遥感找矿 金刚石 金伯利岩 找矿模型 找矿预测 山东 

分 类 号：P627[天文地球—地质矿产勘探]