基于HySpex成像光谱数据的钻孔岩心蚀变矿物提取及其地质意义  

Drilling Core Alteration Mineral Information Extraction and Geological Significance Analysis on HySpex Data

作　　者：李美玉[1] 朱黎江[2] 王俊虎[2] 

机构地区：[1]中国地质大学,北京100083 [2]核工业北京地质研究院,遥感信息与图像分析技术国家级重点实验室,北京100029

出　　处：《铀矿地质》2017年第4期246-251,共6页Uranium Geology

摘　　要：利用遥感技术提取找矿信息主要是提取地质构造信息、特殊岩性段(包括矿化蚀变段)信息等。以湖南省秀才洞热液型铀矿区的钻孔岩心HySpex成像光谱数据为例提取矿化蚀变信息,建立了一种以成像光谱数据处理为基础的矿物信息识别流程,识别出高岭石、蒙脱石、伊利石、方解石、白云母5种蚀变矿物。通过研究岩心中蚀变矿物的类型、组合及其分布规律,总结出研究区的矿化蚀变岩心以伊利石和蒙脱石为主,并伴有高岭石化,推断研究区的赋矿围岩花岗岩发生了酸性交代并产生了泥岩化蚀变现象,而且研究区的构造演化较复杂,岩浆具有多期次、多阶段侵入的特点,蒙脱石比高岭石蚀变强烈反映出成矿环境主要以碱性环境为主。Extracting information by remote sensing technology is mainly made up of extracting the information of the geological structure, the special lithologic distribution （including mineralization alteration） and so on. In this paper, drilling cores in Hunan Xiucaidong hydrothermal type uranium deposit was measured by HySpex ground imaging spectrometer as an example to extracting mineralization alteration information. A set of feasible process of recognizing mineral information was established, montmorillonite, kaolinite, illite, calcite and muscovite was identified. Through analyzing the altered mineral types, composition and distribution in the core, it was found that illite and montmorillonite are the main mineralization alteration types in the study area accompanied by kaolinite, the acid metasomatism and clay alteration occurred in granite wall rock of the study area Because montmorillonite altertion is stronger than kaolinite, it can be inferred that the ore-forming envi- ronment mainly in alkaline environment.

关 键 词：HySpex 蚀变 成像高光谱遥感 铀矿 

分 类 号：P627[天文地球—地质矿产勘探]