Weights Of Evidence Mineralization Prospect Evaluation, Rigaze Of Xizang Area

Research area tectonic located in northern Himalayas, the yarlung zangbo river north, Located in the yarlung zangbo river middle and at the beginning of alluvial plain area, east to Tibet's capital, Lhasa, South by the Himalayas, The west highland, ali. The north northern plateau. Based on the theory of evidence weight method, based on previous fully collect geological, geophysical and geochemical and remote sensing image, the mineral exploration data based on the analysis of the research area, gold, copper deposits (occurrences) and regional metallogenic regularity, ore-forming geological tectonic space relationships, summarizes the au, cu deposit two typical regional prospecting model, through the prospecting model based on evidence weight model, model of determining final ore-hunting prospect target area, and on the analysis process are expounded. This work is based on MapGIS, ArcView ArcGIS, such software platform, geographical information integration, extraction, screening in basic formation, regional tectonics, magmatic rocks, metamorphic rocks, intrusive rocks, geophysical and geochemical metallogenic information symbol of data, on the basis of the mathematical Agterberg geologist by Canada put on weight of evidence law rigaze areas of gold and copper mineral resources both quantitatively forecasting analysis and evaluation.In recent years, with the opening of the qinghai-tibet railway, Tibet mineral resources will get effective development and utilization. According to relevant information prediction by 2010, Tibet, the potential value of the mineral resources in 600 billion yuan of above. Along qinghai-tibet railway in the area and mineral resources are very rich, non-ferrous metal resources over 2000 tons of vision. But unfortunately, Tibet existing mineral exploration work is still lags behind, the exploration area proportion of less than 10% of the mining area for exploration, except for a few mining to scrutinize the exploration, geological exploration, the vast majority of study and census. So, how to strengthen the metallogenic prediction research work to guide future prospecting work deployment optimization exploration district, is a very difficult problems to be solved. Therefore, a reasonable evaluation method of mineral resources, Tibet has special geographic conditions that the area is very necessary. Using the method of evidence weight rigaze area of mineral resources evaluation, analysis and prediction is an innovative try, if this method can very good and accurate utilization of mineral resource development in Tibet and the evaluation work, it will be has important guiding significance for the future of Tibet ore-prospecting work.