基于证据权模型的赤峰—呼伦贝尔成矿带找矿预测

赤峰—呼伦贝尔成矿带是大兴安岭南部黄岗梁—甘珠尔庙成矿带的一部分，该区域地质构造复杂，地壳以及岩浆岩活动剧烈，在大兴安岭南部区域矿带中形成了多金属矿产成矿潜力。为寻求研究区找矿突破，解决赤峰—呼伦贝尔成矿带的成矿预测理论以及模型预测不完善的问题，提出了一种基于地理信息系统技术和数据权理论的赤峰—呼伦贝尔成矿带找矿预测模型。首先阐述了该预测模型的构建思路，利用地理信息系统空间分析软件（ArcGIS）对获取的研究区域地层信息、构造信息、岩浆岩信息进行空间分析，形成空间数据库；然后将证据权理论应用于预测模型中，构建了赤峰—呼伦贝尔成矿带成矿预测模型。根据构建的模型，进行了成矿预测，通过将空间数据库中的数据代入预测模型中得到该区域内各证据因子的权重以及概率，进而将该区域按照成矿潜力分成3类靶区。经验证，各靶区找矿潜力较好，证明了预测结果的有效性。所构建的成矿预测模型，对于进一步在赤峰—呼伦贝尔成矿带进行找矿勘探研究与实践具有一定的参考价值。

Prospecting Prediction of Chifeng-Hulunbeier Metallogenic Belt Based on Weight of Evidence Model

The Chifeng-Hulunbeier metallogenic belt is the part of Huanggangliang-Ganzhuermiao metallogenic belt in the south of Greater Xing'an Mountains.The geological structure of this area is complex，and crust and magmatic rock activities are intense，which has the potential to form polymetallic minerals in the South of Greater Khingan Mountains.In order to seek prospecting breakthroughs in the study area，and solve the problems of incomplete metallogenic prediction theory and model prediction of Chifeng-Hulunbuir metallogenic belt，a metallogenic prediction model of Chifeng-Hulunbuir metallogenic belt based on geographic information system technology and data weight theory is established.Firstly，the construction process of the prediction model is discussed.The spatial analysis software ArcGIS of the geographic information system is used to conduct spatial analysis on the obtained stratigraphic information，structural information and magmatic rock information in the study area，so as to construct a spatial database.Then，the weight of evidence theory is applied to the prediction model，the metallogenic prediction model of Chifeng-Hulunbuir metallogenic belt is established.Finally，based on the established model，metallogenic prediction work is done.According to the metallogenic potential，the study area is divided into three types target areas based on the evidence factors of the study area acquired by substituting the data from the spatial database into the prediction model.By verification，the metallogenic potential of the target areas are good，which indicated that the metallogenic prediction results is reliable.The established metallogenic prediction model has certain reference significance for conducting exploration and prospecting works in the Chifeng-Hulunbeier metallogenic belt in the future.