| 基于GIS的多元信息成矿预测研究——以赤峰地区为例 |
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| 引用本文： | 陈建平,陈勇,王全明.基于GIS的多元信息成矿预测研究——以赤峰地区为例[J].地学前缘,2008,15(4):18-26. |
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| 作者姓名： | 陈建平 陈勇 王全明 |
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| 作者单位： | 1. 中国地质大学(北京)国土资源与高新技术研究中心,北京,100083;中国地质大学(北京)北京市国土资源信息开发研究重点实验室,北京,100083;中国地质大学地质过程与矿产资源国家重点实验室,北京,100083
2. 中国地质调查局,北京,100011 |
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| 基金项目： | 科学技术部国家科技支撑计划 |
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| 摘 要： | 由于找矿难度越来越大,应用地质、地球物理、地球化学、遥感等资料进行综合信息成矿预测是目前找矿工作发展的一个重要趋势。GIS技术已成为多元信息深层次提取与综合,实施综合信息成矿预测的有效工具。文中以赤峰地区有色金属资源成矿预测研究为例,在总结区域成矿规律的基础上,以地质异常致矿理论为指导,利用GIS平台提取地质、地球物理、地球化学、遥感多元地质找矿信息,并利用航磁、重力资料进行隐伏构造、岩体等相关地质找矿信息的推断与解释,进一步丰富和深化成矿地质背景与深部找矿信息。在此基础上,建立多元地质异常信息找矿模型,采用证据权模型进行多元找矿信息的综合,对有利成矿区进行圈定。预测结果显示,在赤峰地区北部有三条北东-南西向的有利成矿区带,在南部有一条北西-南东向有利成矿区带,已知的86%的矿床或矿点位于这些有利区内,显示出良好的预测效果。本文的研究思路、方法为多元信息成矿预测研究提供了参考,其成果为赤峰地区的有色金属资源勘探开发提供了科学依据。
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| 关 键 词： | 多元信息 成矿预测 GIS 赤峰 |
Study on synthetic informational mineral resource prediction using GIS-a case study in Chifeng region, Inner Mongolia, China |
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| Chen Jianping,Chen Yong,Wang Quanming.Study on synthetic informational mineral resource prediction using GIS-a case study in Chifeng region, Inner Mongolia, China[J].Earth Science Frontiers,2008,15(4):18-26. |
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| Authors: | Chen Jianping Chen Yong Wang Quanming |
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| Abstract: | The Chifeng region is located in the southeastern part of Inner Mongolia, North China. It spans both the metallogenic belts of the Greater Xing'an Mountains and the Yin Mountains. Because of the unique metallogenic background, Chifeng is a region of high nonferrous metal mineral potential in China. In this article, multisource data sets including geological, geochemical, gravity, airborne magnetics, and Landsat ETM+ data were integrated for mineral potential mapping by using GIS technology. Under the guidance of regional metallogenic regularities and the application of the geoanomaly ore forming theory, nine diagnostic deposit recognition criteria layers were extracted from those sets. Furthermore these deposit recognition criteria layers were combined in the weight of evidence (WolE) model, which used the spatial correlations between the evidence layers and the known mineral occurrences, to calculate the posterior probability and indentify the delineated prospective area. The result showed that there were three NE-SW trending prospective belts in the north of Chifeng, and one NW-SE striking favorable ore-forming belt in the south of this region. Eighty-six percent of the known mineral occurrences containing 95% of the mount metal resources fell in these four belts. The authors carried out further research study and provided references for resource prediction and assessment study in this area. The results offered scientific evidence of resource exploration in the Chifeng region. |
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| Keywords: | Chifeng region synthetic information weight of evidence of model nonferrous metal deposits |
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