基于MRAS证据权重法的赣南东部地区锡矿成矿预测

Metallogenic prediction of tin deposits in the eastern part of Southern Jiangxi Province Based on MRAS evidence weight method

在以岩背锡矿典型矿床研究基础上,提取赣南东部地区与锡成矿有关的地质、已知锡矿床(点)、地球物理、地球化学等成矿有利要素,建立斑岩型锡矿定量预测模型,构置各类地学综合成矿信息预测变量。基于MRAS证据权重法,计算得到的后验概率,分级评价研究区斑岩型锡矿的A、B、C3个级别的找矿预测远景区。

On the basis of the study of typical tin deposits in Yanbei,the favorable factors for tin mineralization,such as regional geology,known tin deposits(spots),geophysics and geochemistry,are extracted from the eastern part of South Jiangxi Province.The quantitative prediction model of porphyry type tin deposits is established,and various geosynthetic ore information prediction variables are constructed.Based on the posterior probability calculated by MRAS evidence weight method,the prospective areas of porphyry tin deposits in the study area are evaluated in three grades:A,B and C.