新疆雅满苏地区高光谱遥感地质解译及找矿预测研究
发布时间：2019-01-28 22:01
【摘要】：新疆雅满苏地区位于东天山造山带成矿带内,区内矿产资源丰富,但自然条件较差,在区内开展找矿工作,高光谱遥感技术体现出了明显的技术优势。本文在HyMap成像光谱数据处理与信息提取的基础上,详细阐述了HyMap高光谱数据预处理的基本流程以及高光谱遥感蚀变信息提取与识别的原理和方法。并通过高光谱蚀变信息提取技术对矿区南部地段进行了找矿预测研究。论文取得如下成果：(1)通过对HyMap高光谱数据的辐射定标、大气校正和几何校正等预处理以及数据质量分析,保证了高光谱数据的质量与精度,为蚀变矿物信息提取奠定了良好基础；(2)采用MNF变换、PPI指数计算以及N维可视化分析,进行了光谱端元选取,在波谱分析的基础上,利用光谱角(SAM)法对矿物进行了识别和填图工作,并编制了蚀变矿物分布图；(3)应用HyMap高光谱遥感数据对研究区分布的褐铁矿、黄钾铁矾；蒙脱石、白云母；绿泥石、绿帘石矿物进行了填图,结果与相关资料吻合；(4)通过研究区岩性、断裂、褶皱、环形构造等遥感综合解析,重新认识了研究区地质特征,初步确立了区内构造事件的期次,依次为：①南北向挤压导致早期相对宽缓褶皱被进一步压紧,同时沿着北东向剪切面方向形成断裂；②北西向挤压,随着作用力的增加北西向断裂切割北东向断裂；(5)结合典型矿床特征分析,在矿区南部蚀变矿物识别、遥感异常分析以及遥感地质解译的基础上,结合野外实地验证情况,圈定了2处有利找矿地段,为本区部署地质矿产调查工作提供了依据；(6)经过综合资料分析及遥感解译可知,研究区位于一复合向斜的西段。在找矿有利地段Ⅰ区主要由下石炭统雅满苏组组成,核部为雅满苏组第六岩性段,轴向东西,北翼依次分布雅满苏组第一岩性段至第五岩性段；南翼仅见雅满苏组第五岩性段地层及不整合其上的下二叠统阿其克布拉克组；向斜向西突出转折端较狭窄。而在找矿有利地段Ⅱ区主要由不整合其上的上二叠统大热泉子组组成,叠加其上的扬起端较为开阔的向斜,向斜轴稍向北移,二者褶轴不一致。可能是经历先后两次褶皱作用形成的复合向斜。
[Abstract]:The Yamansu area of Xinjiang is located in the metallogenic belt of the East Tianshan orogenic belt, which is rich in mineral resources but poor in natural conditions. On the basis of processing and information extraction of HyMap imaging spectral data, the basic process of HyMap hyperspectral data preprocessing and the principle and method of extracting and recognizing alteration information from hyperspectral remote sensing are described in detail in this paper. The prediction of ore prospecting in the southern part of the mining area was studied by extracting the information of hyperspectral alteration. The main achievements are as follows: (1) the quality and accuracy of hyperspectral data are guaranteed by pre-processing, such as radiometric calibration, atmospheric correction and geometric correction of HyMap hyperspectral data, as well as the analysis of data quality. It lays a good foundation for the extraction of altered mineral information. (2) MNF transform, PPI exponent calculation and N-dimensional visualization analysis are used to select the spectral end elements. On the basis of spectrum analysis, the spectral angle (SAM) method is used to identify and map the minerals. The distribution map of altered minerals was compiled. (3) the hyperspectral remote sensing data of HyMap were used to map the distribution of limonite, jarosite, montmorillonite, Muscovite, chlorite and verdite minerals in the study area. (4) through the comprehensive analysis of lithology, fault, fold, ring structure and so on, the geological characteristics of the study area are re-recognized, and the periods of tectonic events in the study area are preliminarily established. The sequence is as follows: (1) the early relatively wide and gentle folds were further compressed and formed along the direction of the NNE shear plane during the early period due to the south-north compression; 2NW compression, with the increase of the force, the NW-trending fault cuts the NE-trending fault; (5) based on the characteristic analysis of typical ore deposits, on the basis of the identification of altered minerals, the analysis of remote sensing anomalies and the interpretation of remote sensing geology in the south of the mining area, and combined with the field verification in the field, two favorable ore-prospecting sites have been delineated. It provides the basis for the geological and mineral survey in this area. (6) through comprehensive data analysis and remote sensing interpretation, the study area is located in the western section of a composite syncline. The area I is mainly composed of the Yamansu formation of Lower Carboniferous. The core is the sixth lithologic member of Yamensu formation, axial east-west, and the first lithologic member of Yamensu formation is distributed from the first lithologic section to the fifth lithologic formation in the north wing. In the south wing, only the fifth lithologic member of Yamensu formation and the lower Permian Achikburak formation above unconformity are found, and the syncline is relatively narrow in its westward protruding turning point. In the Prospecting area II is mainly composed of the upper Permian great hot spring formation on which the uplift of the upper Permian is superimposed on the open syncline and slightly moves northward toward the inclined axis. The two fold axes are not consistent. It may be a composite syncline formed by two fold processes.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P627
本文编号：2417352
[Abstract]:The Yamansu area of Xinjiang is located in the metallogenic belt of the East Tianshan orogenic belt, which is rich in mineral resources but poor in natural conditions. On the basis of processing and information extraction of HyMap imaging spectral data, the basic process of HyMap hyperspectral data preprocessing and the principle and method of extracting and recognizing alteration information from hyperspectral remote sensing are described in detail in this paper. The prediction of ore prospecting in the southern part of the mining area was studied by extracting the information of hyperspectral alteration. The main achievements are as follows: (1) the quality and accuracy of hyperspectral data are guaranteed by pre-processing, such as radiometric calibration, atmospheric correction and geometric correction of HyMap hyperspectral data, as well as the analysis of data quality. It lays a good foundation for the extraction of altered mineral information. (2) MNF transform, PPI exponent calculation and N-dimensional visualization analysis are used to select the spectral end elements. On the basis of spectrum analysis, the spectral angle (SAM) method is used to identify and map the minerals. The distribution map of altered minerals was compiled. (3) the hyperspectral remote sensing data of HyMap were used to map the distribution of limonite, jarosite, montmorillonite, Muscovite, chlorite and verdite minerals in the study area. (4) through the comprehensive analysis of lithology, fault, fold, ring structure and so on, the geological characteristics of the study area are re-recognized, and the periods of tectonic events in the study area are preliminarily established. The sequence is as follows: (1) the early relatively wide and gentle folds were further compressed and formed along the direction of the NNE shear plane during the early period due to the south-north compression; 2NW compression, with the increase of the force, the NW-trending fault cuts the NE-trending fault; (5) based on the characteristic analysis of typical ore deposits, on the basis of the identification of altered minerals, the analysis of remote sensing anomalies and the interpretation of remote sensing geology in the south of the mining area, and combined with the field verification in the field, two favorable ore-prospecting sites have been delineated. It provides the basis for the geological and mineral survey in this area. (6) through comprehensive data analysis and remote sensing interpretation, the study area is located in the western section of a composite syncline. The area I is mainly composed of the Yamansu formation of Lower Carboniferous. The core is the sixth lithologic member of Yamensu formation, axial east-west, and the first lithologic member of Yamensu formation is distributed from the first lithologic section to the fifth lithologic formation in the north wing. In the south wing, only the fifth lithologic member of Yamensu formation and the lower Permian Achikburak formation above unconformity are found, and the syncline is relatively narrow in its westward protruding turning point. In the Prospecting area II is mainly composed of the upper Permian great hot spring formation on which the uplift of the upper Permian is superimposed on the open syncline and slightly moves northward toward the inclined axis. The two fold axes are not consistent. It may be a composite syncline formed by two fold processes.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P627
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