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| THE APPLICATION OF WEIGHTS OF EVIDENCE IN MORPAS SYSTEM TO MEDIUM-LARGE SCALE METALLOGENIC PRODICTION |
| CHEN Chong1, TAN Jun1, SHI Wen-jie1, Li Xiang-kun2, DUAN Xian-chao2, GAO Xiang1, ZHAI Ya-feng1 |
1. Faculty of Earth Resource, China University of Geosciences, Wuhan 430074, China;
2. Qian'an Oil Recovery Plant, Jilin Oilfield Co. , Ltd. , Qi-an'an 131400, China |
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Abstract The application effect of weight of evidence modeling in small-medium scale metallogenic prediction is fairly good,but researches on weight of evidence modeling of medium-large scale metallogenic prediction in small low working level areas are very insufficient. In this paper, the authors selected a certain medium-large scale work area and a small low working level area in Alxa region. According to geological features in combination with spatial position analysis, appropriate evidence factors were selected. By linking each evidence factor with NE grid size of 80 m×40 m, the authors analyzed and calculated spatial relationship between the evidence and Cu high points on the basis of weight of evidence modeling in MORPAS system. Spatial distribution of favorable ore-prospecting areas is expressed intuitively through graphics. Two trenchs intersect the ore body, suggesting that the model is also suitable for the medium-large scale and small low working level area metallogenic prediction.
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Received: 10 April 2011
Published: 10 October 2012
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