云南中甸地区高光谱遥感矿物信息提取

发布时间：2018-05-13 22:19

本文选题：成像光谱技术 + 矿物波谱机理　；参考：《成都理工大学》2017年硕士论文

【摘要】：成像光谱技术因具有高分辨率、波段连续性好等优点,现已成为遥感的主打方向。历经20多年的发展,已在地质矿产资源调查领域,尤其是在矿物识别及填图方面,得到广泛应用,矿物识别技术已成为其关键技术。本文以云南中甸(香格里拉)格咱岛弧矿集区为研究区,开展了基于美国SVC HR 1024i地物波谱仪的野外矿物波谱实测、分析及其波谱特征变化的基础性研究,建立了中高植被区面向波谱识别的矿物波谱库及较为合适的矿物信息提取方法。据此,采用Hyperion遥感影像数据对研究区中的重点区域实施矿物填图实验,并取得了较好的效果。其本文主要研究内容在以下方面:(1)通过对研究区中矿物波谱形成机理的分析发现含铁氧化物和粘土矿物为主要矿物。基于野外考察及矿物波谱分析,总结出了该区矿物波谱特征的稳定性,为后续矿物填图打下了夯实的理论基础。(2)采用Hyperion遥感数据对研究区开展了矿物识别实验,实验中运用MTMF方法降低了区域内植被的影响,较光谱角制图有所提高,实验效果较好。(3)对SAM与MTMF方法提出的矿物信息与普朗矿区蚀变带叠合分析,可以得出在钾化硅化带、青磐岩化带、绢英岩化带中绿泥石的空间吻合率最高,其中在青磐岩化带中吻合率分别达到37.24%、52.65%;与矿区岩体叠合分析,得出在花岗岩闪长斑岩、石英闪长玢岩、石英二长斑岩中也是绿泥石的空间吻合率最高,其中在石英闪长玢岩中吻合率分别达到33.51%、60.86%。绿泥石在蚀变带与岩体的叠加分析中,所占的份额最大,这都是由岩体中所含的矿物成分相关联。
[Abstract]:Imaging spectrum technology has become the main direction of remote sensing because of its advantages of high resolution and good band continuity. After more than 20 years' development, it has been widely used in the field of geological and mineral resources investigation, especially in mineral identification and mapping. Mineral identification technology has become the key technology. In this paper, based on the SVC HR1024i ground object spectrometer in the United States of America, the field mineral spectrum measurement, analysis and fundamental research on the variation of spectral characteristics of minerals are carried out in the study area of Gezan island arc ore concentration area in Zhongdian (Shangri-La), Yunnan Province. A mineral spectrum database for spectral recognition and a more suitable method for extracting mineral information are established in the middle and high vegetation areas. Based on this, the Hyperion remote sensing image data are used to carry out mineral mapping experiments in the key areas of the study area, and good results are obtained. The main contents of this paper are as follows: (1) based on the analysis of the formation mechanism of mineral spectra in the study area, it is found that iron oxide and clay minerals are the main minerals. Based on field investigation and mineral spectrum analysis, the stability of mineral spectral characteristics in this area is summarized, which lays a solid theoretical foundation for subsequent mineral mapping. In the experiment, MTMF method is used to reduce the influence of vegetation in the area, which is better than the spectral angle mapping. The experiment results show that the mineral information proposed by the SAM and MTMF method is superimposed on the alteration zone of Plang mining area, and the silicification zone can be obtained in the potash silicide zone. The rate of spatial coincidence of chlorite is the highest in the Qingpan petrolization zone and sericolith zone, in which the coincidence rate is 37.2452.65, respectively, and superimposed with the ore-body, it is concluded that in granite diorite porphyry, quartz diorite porphyrite, In quartz monzogranite porphyry, the spatial coincidence rate of chlorite is also the highest, and the coincidence rate in quartz diorite porphyry is 33.51% and 60.86% respectively. Chlorite occupies the largest share in the superposition analysis of alteration zone and rock mass, which is related to the mineral composition contained in the rock mass.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P627

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