| In today's era of big data,there are more and more successful launch satellite sensor,In the background of the obtained spectral resolution and spatial resolution of remote sensing images were greatly improved,the topic selection is how to develop different remote sensing data sources to improve the efficiency and precision of the massive data in the "remote sensing market" and to meet the new requirements of the geological work in the new period.The study area includes the Nannihu-Sandaozhuang Molybdenum Tungsten Deposit and the surrounding area,with a total area of 50 square kilometers.Nannihu ore field geological and mineralization background is complex,rich in mineral resources.However,there have been few studies on the application of remote sensing geology in the region over the years.In this paper,based on the analysis of regional geological background,the author analyzes the strata-lithology and tectonics of the study area,and extracts the mineralization alteration in the study area,Finally,in the three-dimensional geological model,the relationship between the image characteristics(mainly the different color)and the molybdenum grade is analyzed,and it is proved that the alteration mineralization and the loop structure are important metallogenic factors.Specific research results and awareness are as follows:(1)Research on lithology information enhancement of remote sensing strata in research areas based on World View-2 and other multi-source imagesWith World View-2 and Hyperion as data sources,the lithology information of remote sensing strata in the study area is enhanced.The Hyperion hyperspectral image is used to interpret the lithology of the formation,and then the World View-2 with high spatial resolution is used to refine the study area.The lithology interpretation sign is established,and the lithology boundary is divided and the effect is good.(2)Based on World View-2 and other multi-source image of the study area of remote sensing loop structure interpretationThe structure of the Landsat 8 image is analyzed by principal component analysis,direction filtering,optimal band group and so on.The structure of the studyarea is extracted,and the macroscopic structure of the study area is extracted.Then,the rich color information of the synthesized image of World View-2 and Spot images of high spatial resolution characteristics of the local high-precision large-scale structural interpretation.(3)Remote sensing alteration extraction of research areas based on World View-2and other multi-source imagesBased on the World View-2 band spectral feature,it can only extract alterations in iron-related aspects.Based on the analysis of the characteristics of iron oxide spectroscopy in the field,the main component analysis method was used to extract the iron change in the study area.In addition,the use of ETM + extraction of hydroxyl,iron dyeing change.Then,six kinds of alterations of potassium alum,chlorite,sodium zeolite,zeolite,albite and calcium chrome garnet were extracted by spectral angle method with the hyperion image combined with the spectral characteristics of the measured mineral lithology in the field mineral.(4)Correlation analysis of 3D geological grade model with interpretation resultsThe interpretation of the geological phenomena on the grade of the mining area and the surrounding mineral grade is related to the three-dimensional model of the rock mass-ore body in the study area.The remote sensing image of the World View-2is connected with the molybdenum grade model. |
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