Study On Uranium Remote Sensing Abnormal In Manzhouli-lingquan Region

Manzhouli-Lingquan region is located in the volcanic rock type uraniummetallogenic belt of Kerulen-Eerguna, in the belt and has similar geological conditionwith Telechuf Field of Russia and Durnuot Field of Mongolia, has good ore prospects.Remote sensing for uranium deposits mainly uses the means of remote sensinglooking for geological and alteration information which related to uranium, thispaper respectively us the OLI, ASTER and ETM+multi-spectral remote sensing datain research, researched the extraction of remote sensing geological structureinterpretation and remote sensing anomaly information for the study area and resultsare as follows:1.In the process of researching geological information, Using the OLI, ETM+data, using OLI, ETM+and DEM data to interpret the geological structure byestablishing interpretation keys such as tone, river system, terrain (landform), texturepattern, linear and circle structure is main interpretation. Tectonic framework in thearea: Line structure is developde, the main cause are faults, joint fissures andlithologic boundary, etc， that are widely distributed in each direction, of which theEast-West is one of the most early, clearly visible by later tectonic transformationcharacteristics; North-West is the latest (or the new activities of inheritance). Amongthem, the trunk fracture of northeast, the secondary fracture or fracture intersectionparts alone with circular structures, constitute the structure of the volcanic rock typeuranium metallogenic conditions in the study area, which controls the formation ofuranium deposit.2.In the process of researching remote sensing alteration favorable information,according to the described of field the collecting rock samples and regional geologicalbackground and measured spectral information, the main alteration types and itsspectrum characteristic in the study area are analyzed. In the range of VNIR-SWIRspectral, use the principal component analysis, designing band combination,extracting chloritization, sericitization, carbonatization and pyritization alteration,which are related to uranium mineralization, and mapping extraction result byclassification. In the range of TIR spectral, is silicide information extraction, first, turn the ASTER thermal infrared data from DN value to emissivity, then using SiO2content inversion formula of quantitative inversion of SiO2content, and display inclassification. Large faulting resulted in hydrothermal rise to form silicide fault zone,on the SiO2content map will show a certain linear features.3.Overlaying the result of structural interpretation and remote sensing anomalyextraction in the study area, combining with the field rock samples and the knownuranium deposits (abnormal) were analyzed. found that the fracture development ofEast high SiO2content, silicide faults well-developed, and tectonic fracture inconformity with the SiO2content of silicide fault zone. Alternating between fractureprovides a good channel for ore fluid migration, and around the fault fracture zoneprovide for uranium store the space of ore fluid, these parts provide environment forthe migration and enrichment of uranium tectonic, is the favorable area for mineralize.The extraction of alteration information has a better match with known uraniumdeposits (abnormal), to a certain extent can show uranium (abnormal).