云南凤庆地区遥感地质解译及矿化蚀变信息提取

发布时间：2018-05-29 11:12

本文选题：地质解译 + 遥感异常　；参考：《成都理工大学》2015年硕士论文

【摘要】：云南凤庆地区矿产资源较为丰富,成矿的地层及构造—岩浆条件良好,在常规的找矿工作难度不断加大的前提下,应用遥感技术寻找新的矿床具有重要作用,可以迅速识别出围岩蚀变异常,通过提取蚀变信息圈出成矿区域,为常规找矿方法提供可靠参考依据。本文将遥感和数学地质相结合,运用SPOT 6、ASTER、Landsat 8卫星影像为基础数据,结合地质调查数据,对该地区进行遥感地质解译和矿化蚀变信息进行提取研究。本文取得了以下成果:(1)分析研究内容及遥感数据特征,对各遥感数据进行预处理,制作遥感解译底图和蚀变信息提取底图,为进一步研究做准备。(2)利用云南省凤庆地区SPOT 6影像为基础,结合以往的地质资料通过影像解译建立了研究区岩性、地层与构造的解译标志,做出了研究区地质解译图。(3)结合已有勘察资料,从遥感蚀变信息提取的地质依据和波谱依据为前提,总结提取矿物蚀变异常的方法。去除蚀变提取中干扰信息的基础上,根据蚀变矿物的波谱特征,利用主成分分析法对研究区的ASTER和Landsat 8影像数据进行铁染蚀变和羟基蚀变信息提取,并对蚀变信息进行滤波和分级处理。(4)对所提取的岩性、构造、蚀变信息进行野外验证,结合该地区的物探、化探数据进行遥感找矿信息的综合分析和进一步验证。证明了在该区域利用遥感技术进行矿物蚀变信息提取是可行有效的。本次研究成果为云南凤庆地区的矿产资源勘查工作提供了重要的找矿依据,对该地区成矿预测,以及国民经济的发展,有着十分重要的意义。
[Abstract]:The Fengqing area of Yunnan Province is rich in mineral resources, and the ore-forming strata and tectonic-magma conditions are good. Under the premise of the increasing difficulty of conventional prospecting work, it is important to use remote sensing technology to find new deposits. The alteration anomaly of surrounding rock can be quickly identified, and the metallogenic area can be obtained by extracting alteration information, which provides a reliable reference for conventional prospecting methods. In this paper, the remote sensing and mathematical geology are combined, and the remote sensing geological interpretation and mineralized alteration information in this area are extracted and studied by using the satellite image of SPOT 6 and ASTER-Landsat 8 as the basic data and the geological survey data. This paper has obtained the following achievements: 1) analyzing the contents and characteristics of remote sensing data, preprocessing each remote sensing data, making remote-sensing interpretation background map and alteration information extracting base map, In preparation for further study, based on SPOT 6 image in Fengqing area, Yunnan Province, the lithologic, stratigraphic and structural interpretation marks of the study area are established by image interpretation combined with previous geological data. The geological interpretation map of the study area. 3) based on the existing survey data and the geological basis and spectral basis of remote sensing alteration information extraction, the methods of extracting mineral alteration anomalies are summarized. On the basis of removing the interference information in alteration extraction and according to the spectral characteristics of altered minerals, the iron-stained alteration and hydroxyl alteration information were extracted from ASTER and Landsat 8 image data of the study area by principal component analysis (PCA). And the altered information is filtered and classified. 4) the extracted lithology, structure and alteration information are verified in the field. Combined with the geophysical and geochemical exploration data in this area, the remote sensing prospecting information is comprehensively analyzed and further verified. It is proved that the extraction of mineral alteration information by remote sensing is feasible and effective. The results of this study provide an important basis for the exploration of mineral resources in Fengqing area of Yunnan Province and are of great significance to the metallogenic prediction and the development of the national economy in this area.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P627

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