基于模糊证据权法的江西相山盆地火山岩型铀矿成矿潜力评价  

Application of Fuzzy Weights of Evidence Method to Prediction of Mineralization in the Volcanic-type Uranium Deposit in Xiangshan Basin,Jiangxi

作　　者：黄鑫怀 李红利 李增华 曾皓轩 郭福生[1] 吴志春[1] 邓腾 刘嘉炜 HUANG Xinhuai;LI Hongli;LI Zenghua;ZENG Haoxuan;GUO Fusheng;WU Zhichun;DENG Teng;LIU Jiawei(School of Earth Sciences,East China University of Technology,Nanchang,Jiangxi 330013,China)

机构地区：[1]东华理工大学地球科学学院,江西南昌330013

出　　处：《世界核地质科学》2023年第2期226-235,共10页World Nuclear Geoscience

基　　金：国家自然科学基金项目(编号:42172329、41972080);江西省技术创新引导类计划(编号:20212AEI91008);中国铀业有限公司-东华理工大学核资源与环境国家重点实验室联合创新基金(编号:NRE2021-08)联合资助。

摘　　要：江西相山盆地作为我国最大的火山岩型铀矿产地,已经开展多年的铀矿勘查工作,发现大、中型铀矿床及铀矿化点上百处,积累了大量地质找矿资料。文章利用模糊证据权法从盆地尺度建立预测模型,综合多种数据,包括地质、物探、化探和遥感解译等提取证据图层,并结合已知铀矿床和矿点的分布数据作为训练样本建立相山盆地铀矿床预测模型,利用接受者操作特征曲线(ROC曲线)评价模型结果的优度,并进行铀成矿潜力评价。通过该模型得到的相山铀成矿潜力预测后验概率图,发现相山盆地最有利的成矿潜力区主要位于其北部及西北部,与已知矿床点吻合度较高。根据预测结果,该区的下一步铀矿勘查工作重点仍是北部和西北部区域;其次,在东南部的少数区域也有成矿的可能性,可作为次级勘查区域。As the largest volcanic type uranium production site in China,Xiangshan Basin in Jiangxi Province has experienced uranium exploration for many years.Decades uranium deposits and occurrences have been discovered,and a large amount of geological prospecting data have been accumulated.In this paper,the evidence fuzzy weight method was used to establish a prediction model from the basin scale,and a training evidence layer is established by integrating various data,including geology,geophysical,geochemical and remote sensing interpretation,etc.,and the known uranium deposit and occurrence data were used as the training samples to establish a uranium deposit prediction model in Xiangshan Basin.The ROC curve was used to evaluate the merit of the model results so as to evaluate the uranium mineralization potential.According to the posteriori probability diagram of uranium metallogenic potential prediction of Xiangshan Basin,it was found that the most favorable metallogenic potential targets are mainly located in the north and northwest of Xiangshan Basin,which are in good agreement with known deposit.According to the prediction results,the next uranium exploration in this area should focus on the northern and northwestern regions.And a few areas in the southeast also have the possibility of mineralization and can be used as secondary exploration areas.

关 键 词：模糊证据权 成矿潜力评价 ROC曲线 相山盆地 

分 类 号：P619.14[天文地球—矿床学]