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引用本文:陈永清1,2 夏庆霖3 黄静宁1 陈建国3 李建国1,4. “证据权”法在西南“三江”南段矿产资源评价中的应用[J]. 中国地质, 2007, 34(1): 132-141.
CHEN Yong-qing1,2, XIA Qing-lin3, HUANG Jing-ning1, CHEN Jian-guo3, LI Jian-guo1,4. Application of the weights-of-evidence method in mineral resource assessments in the southern segment of the “Sanjiang metallogenic zone”, southwestern China[J]. Geology in China, 2007, 34(1): 132-141(in Chinese with English abstract).
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“证据权”法在西南“三江”南段矿产资源评价中的应用
陈永清1,2 夏庆霖3 黄静宁1 陈建国3 李建国1,41,2,3,4
1.中国地质大学地球科学与资源学院,北京 100083;2.中国地质调查局发展研究中心,北京 100037;3.中国地质大学资源学院,湖北 武汉430074;4.云南省地质调查院,云南 昆明 650051
摘要:
提要:证据权法本身是一种离散的多元统计方法。阐述了矿物资源潜力区的概念,简述证据权法的基本原理。以西南“三江”南段为例,首先在地质、地球物理、地球化学以及遥感地质等致矿信息提取的基础上,运用证据权法定量分析各类致矿信息(控矿因素)与矿产资源空间分布的关系;进而选择最佳控矿因素作为资源评价变量,据其变量计算每个单元的后验成矿概率;最终根据后验成矿概率定量圈定和评价找矿靶区。实践证明:在GIS环境下,“证据权”与找矿信息结合能够有效区分矿化有利地段和不利地段,从而达到定量快速圈定和评价找矿靶区之目的。整个过程是借助于MOPAS3.0评价系统实现的。
关键词:  证据权法  致矿信息提取与集成  矿产资源评价  MOPAS3.0软件系统
DOI:
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基金项目:国家高技术发展计划(863计划)探索项目(2006AA06Z113)和“十五”国家科技攻关课题(2003BA612A-02)资助。
Application of the weights-of-evidence method in mineral resource assessments in the southern segment of the “Sanjiang metallogenic zone”, southwestern China
CHEN Yong-qing1,2, XIA Qing-lin3, HUANG Jing-ning1, CHEN Jian-guo3, LI Jian-guo1,41,2,3,4
1. China University of Geosciences, Beijing 100083, China;2. D & R Center of China Geological Survey, Beijing 100037, China;3. China University of Geosciences (Wuhan), Wuhan 430074, Hubei, China;4. Yunnan Institute of Geological Survey, Kunming 650051, Yunnan, China
Abstract:
Abstract:The weights-of-evidence method is a discrete multivariate statistical method. It elucidates the concept of mineral resource potential areas and briefly describes the basic principle of the weights-of-evidence method. Take for example the southern segment in the "Sanjiang" metallogenic zone of southwestern China, the spatial relationship between various kinds of ore-forming information (ore-controlling factors) and mineral resource distribution is quantitatively analyzed by using the weights-of-evidence method on the basis of extraction of ore-forming information from geological, geophysical, geochemical and remote sensing geological data. Then the best ore-controlling factors are chosen as the variables for mineral resource assessments, which are used for calculating the posterior ore-forming probability of each unit. Eventually, ore-finding target areas are quantitatively delineated and evaluated according to their posterior ore-forming probabilities. This case study has illustrated that under the GIS environment the favorable mineralized areas can be effectively distinguished from the unfavorable ones through the combination of the "weights-of-evidence method" with ore-finding information so that the goal of fast quantitative delineation and assessments of the ore-finding target areas may achieved with the help of MORPAS3.0.
Key words:  weights-of-evidence method  extraction and integration of ore-forming information  mineral resource assessment  MORPAS3.0 software