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APPLICATION OF WEIGHTS OF EVIDENCE MODELING TO PREDICTION OF POTENTIAL POLYMETALLIC NODULE RESOURCES IN THE CLARION-CLIPPERTON ZONE

ZHOU Ning1,LI Deping2,3,TIAN Chiying1,ZHOU Huaiyang2 and YANG Qunhui2(1.China Mineral Resources R&D Association,Beijing 100860,China;2.CAS Key Laboratory of Marginal Sea Geology,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;3.GIS Research Center,College of Resources & Environment Science,Hunan Normal University,Changsha 410081,Hunan,China)  
In this paper the potential polymetallic nodule resources in the Clarion-Clipperton Fracture Zone(CCZ)are predicted using the Weights of Evidence Modeling on the basis of major ore-controlling geological evidences including seabed faults,sediment types,primary biological productivity and water depth.The spatial correlations between geological evidences and discovered nodules show that the sequence of the weights of ore-controlling geological evidences is as follows:sediment types,primary biological productivity,seabed faults and water depth.The prediction results show that the interval of posterior probabilities of mineralization for the discovered nodules is 0.29-0.73,which illuminates that the Weights of Evidence Modeling method is effective for the prediction of potential oceanic polymetallic nodule resources.The distribution of posterior probabilities for mineralization favorability shows that the south and southwest areas of the CCZ are the potential areas for exploring nodules in the future.
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