摘要
介绍了ArcView平台ModelBuilder扩展模块中的权重叠加(weighted overlay)模型的原理及其在资源预测中的应用。权重叠加模型通过设置不同图层的影响比例和各图层中控矿因素的权重来实现预测和评价,该方法具有权重比例设置地质意义明确、实现过程简单、交互性强的特点。模型中的参数可根据研究人员对成矿规律的认识和所掌握情况进行调整,据此可快速得到各控矿因素不同权重时的预测结果图。以陕西旬北铅锌矿富集区为例,在ArcView平台中应用权重叠加模型进行了铅锌矿成矿远景区的预测和评价。从预测结果图看,研究区内绝大多数矿床(点)落入成矿有利度的高值区域,表明该方法预测结果的可信度高,可用于矿产资源的预测和评价工作。
This paper introduces the principle and application of ModelBuilder extension in the ArcView GIS platform into mineral resources forecast and appreciation. The weighted overlay model in ModelBuilder extension has many advantages to ore forecast, such as explicit geological signification of the parameters and simple computation process. It allows geologists to exert different influence proportion to ore-controlling evidence layers according to the mineralization rule and quickly gain the forecast map. It indicates that the computation process has a strong interaction. The weighted overlay model of the ModelBuilder extension in the ArcView platform is used in the paper to forecast the resources of lead-zinc mine in Xunbei region, Shaanxi Province. The result of prediction reveals that most of known ore deposits are found in favorable mineralization region. This, in turn, proves that this method is effective for ore forecast or evaluation.
出处
《地质科技情报》
CAS
CSCD
北大核心
2007年第4期11-14,共4页
Geological Science and Technology Information
基金
中国地质调查局项目"秦岭-松潘成矿区成矿规律与找矿方向综合研究"(20010200015)
