Applied Research |
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APPLICATION OF REMOTE SENSING IMAGERY MODEL FOR GOLD DEPOSIT AND "EVIDENCE-RIGHT-WEIGHT"METHOD IN GOLD DEPOSIT PREDICTION |
Luo Fusheng, Cui Zhenkui, Xu Shuang, Wang Guojuan |
Beijing Research Institute of Uranium Geology, Beijing 100029 China |
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Abstract Xiongershan region, Henan province is an important gold-mineralized area in China. Research of gold mineralization and selection of prospective targets in the region have been carried out by using remote sensing technology. First of all, TM image data are processed through various methods to get ideal remote sensing images, then, the image information is interpreted and analyzed in combinaticon with regional geological survey and typical gold deposit study to determin main ore control factors, such as structures,ore-bearing strata, rock bodies, and alteration, etc. The remote Sensing imagery models of different types of gold deposit have been set up on tho basis of extraction of comprehensive image signatures and gold deposit distribution pattern.In the light of the models, prospecting targets have been chosen by using "evidence-right-weight" graphics information integration. The method,which presents favourable geological factors of ore control as binary graphics and calculates their "evidence-right-weight", is based on Bayes rule, By use of geographic information system (GIS), mutual independent geological factors relative to the deposit, mineralization evidence, are integrated statisticaly for calculating posterior probability of gold deposit distribution,which can be used to indicate potential gold-mineralized area, The method,combination of remote sensing, statistics and expert’s experiences, is provided with a rigorous theoretical basis and visual, fast, and flexible characterastics,and is convinent for geological application.After practice, it is concluded that according to remote sensing imagery models of different type of gold mineralization and "evidence-right-weight"graphics information integration method to choose prospecting targets is succeesful. Various extents of gold mineralization have been found in 8 first class and 5 second class potential areas predicted by us after field testing . The result is very obvious.
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Keywords
the Three Gorges area
Qianjiangping landslide
Remote sensing technique
Triggering factor
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Issue Date: 02 August 2011
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[1] 黎世美.熊耳山地区蚀变构造岩型金矿成矿模式及矿床成因探讨.豫西地质, 1990(1);1-7[2] G. F Bonham-Carter. F. R Agterberg and D. F. wright, weights of evidence modelling a new approach to maPPmB mweral Potentials}n Statistical APPlications in the Earth Scieaces. Geological survey of Canada, Paper.1989,89(9),171-183[3] F P Agtarberg.用于矿产资源评价的指示图形的复合.见中国地质大学(武汉)编《矿产资源统计预测国际研讨会文集》.武汉:中国地质大学出版社.1990.1-15 |
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