Research On Gold Resource Quantitative Prediction In Qingshui-songkaersu, East Junggar, Xinjiang Province

Located in the eastern part of the Junggar Basin in Xijiang Province, Qingshui-Songkaersu region belongs to the middle-west segment of Kalamaili metallogenic beltand is chosen as the research area of this dissertation. Currently, lots of gold depositsand occurrences have been discovered in this region. By studying the characteristicsof regional tectonic evolution, stratum, structure, distribution of igneous rocks andtypical deposit, genetic models of gold deposits in research area have been analyzed.Based on geologic anomaly theory, geophysical, geochemical and remote sensinganomalies have been analyzed quantitatively to assess the gold resource potential inthis region by GIS and remote sensing technology. The main conclusions are listed asfollows:1. The regional data of geology, mineral resource, geophysics, geochemistry andremote sensing have been collected comprehensively to establish a unifiedvectorization basic geological database for geological quantitative research.2.Remote sensing prospecting research based on WorldView2(spatial resolutionof0.61m, the United States) has been carried out for the first time in research area byextracting the spatial characteristics of mineralization and alteration zones inJinshuiquan, which has instructive meanings for regional mineral resourceprospecting.3. Many method combinations have been designed by layer stack, ratio synthesis,layer ratio synthesis, principal component analysis, wavelet transformation, pixelunmixing, supervise classification and color composite image generation according tothe characteristics of geology and geography and a contrastive analysis of lithology,alteration and rock spectrum. Based on ETM multi-band remote sensing data,different types of alteration information have been extracted through repeatedexperiments and comparison. Regional structures of the entire research area have alsobeen interpreted based on small-scale ETM images. 4. The data of regional aeromagnetics, gravity and geochemistry have beenprocessed. The lower limit of anomaly has been determined by contrasting differentmethods and anomalies related to ore-forming process have also been extracted.5. Geologic, geophysical, geochemical and remote sensing anomalies have beenprocessed quantitatively and analyzed comprehensively to establish prospectingmodel for the research area. Quantitative assessment of gold resource inQingshui-Songkaersu region has been conducted and four A-order, three B-order andthree C-order prospecting areas have been delineated by evidence weighting methodand information method based on GIS platform. The gold resource is predicted to be2,703.5t.