Based On ASTER Remote Sensing Data, Geological Information Extraction And Integrated Metallogenic Prediction

The research give full play to the objective, macroscopic advantages of remote sensing technology (RS) and extraction process was established of the remote sensing mineralization alteration information by using common mineral spectral reflectance information base on ASTER remote sensing data, and carried out research on comprehensive metallogenic prediction based on the weights of evidence method. the innovative achievements are mainly in the following three aspects:(1) The hydroxyl, iron staining, carbonation and corrosion of silicified anomaly information extracted from the experience parameters and methods of process was established in exploring, in which has high mountains and deep valley, the terrain elevation, vegetation cover thickness, too much shadow, cloud and snow of the Yunnan plateau mountain areas.Research is based on the ASTER remote sensing data, selecting Baoshan City Longyang-Longling area as demonstration area, according to the different disturbance degree of the shadow, cloud, snow cover, vegetation divides the highly disturbed zone, moderate interference and interference zone, and in accordance with the United States Geological Survey (USGS) and ASU indoor determination of the mineral spectral reflectance curve, using the ASTER remote sensing data in the visible/near infrared and shortwave infrared bands to extract of hydroxyl, iron staining and carbonate alteration anomaly information in the demonstration area, and according to the use of ’the method of mathematical statistics mean+N*standard deviation" from high to low classificate1-3level alteration anomaly information; and using thermal infrared band of ASTER remote sensing data, through method of temperature inversion and the band operation of inversion of SiO2content, with SiO2>56%as the standard extract demonstration zone silicic alteration anomaly information, based on the interference of grading and mask.(2) analyzing and mining the metallogenic and ore-controlling remote sensing geological information of Baoshan City Longyang-Longling area based on ASTER remote sensing data, which laid a solid foundation for deepening the regional geological knowledge and subsequent mineralization prediction.Using the ASTER remote sensing data to establish the interpretation signs of remote sensing linear and circular structures in demonstration area, and interpretated of remote sensing linear and circular structures, deepen the understanding of the geological background demonstration area pattern.based on in-depth analysis characteristics of the extracted alteration information and interpreted intersection of linear and circular structures, using the GIS platform and combining the mineralize and ore-controlling regularity to analyse of the demonstration zone of mining the metallogenic and ore-controlling conditions, and the information between intersection of linear and circular structures, alteration anomaly and the known ore occurrences were related to spatial analysis:①introduced the "experience" theory, combined the quantitative extraction with artificial experience, the relationship between intersection line and ring structure and ore-controlling was seted up.②statisticing and analysing of the development density relationship based on the MRAS software.③attacking as the goal of zinc, copper and deposit, statistic ing and analysing of the relationship in demonstration zone between deposits have been found and the exposed strata, establishing Cambrian, Carboniferous and Ordovician in the area is the main favorable ore-forming strata.(3)Exploratory development of remote sensing geological comprehensive information metallogenic prediction,results directly promote the prospecting progress, provide clues and guide the application.Research Based on MRAS software platform, using weight of evidence method, combine extracted hydroxyl, iron staining, carbonation and corrosion of silicified anomaly information, remote sensing interpretation linear-ring structure intersection, favorable prospecting lineament density and ore-control structure, favorable metallogenic strata divisors for remote sensing geology comprehensive information metallogenic prediction research, delineating favorable prospect area. on-the-spot investigation and exploration data confirm, metallogenic prediction results show a good agreement with the progress in prospecting.In conclusion, this study has made innovative progress in technology and application of research, research ideas and methods is worthy of popularization and application.