隐伏矿体三维综合信息成矿预测方法

Three Dimension Prospectivity Modelling Based on Integrated Geoinformation for Prediction of Buried Orebodies

开展三维综合信息成矿预测,是当前隐伏矿体找矿勘探的实际需要,但目前尚缺乏系统的研究,工作方法体系仍有待深入探讨。本文提出了一套较为完善的隐伏矿体三维综合信息定量预测流程和方法。方法包括数据收集及地质数据库管理、三维地质建模及地球物理数据融合、地质特征空间分析及控矿因素提取、多维多元控矿信息融合及预测信息集构建、隐伏矿体三维定位定量预测等多方面内容。由于方法综合了地质体三维建模、多维空间分析技术、地球物理方法以及预测方法,因此可有效提高三维成矿预测的有效性和可靠程度。为验证方法的有效性,本文在宁芜盆地分别针对矿田和矿区尺度,开展了中、大比例尺的三维成矿预测实例研究,取得了较好效果。研究显示该方法体系可有效地对深部隐伏矿体进行定位定量预测,能够服务于今后的新老矿区隐伏矿体找矿勘探工作。

For the practical need of prospecting and exploration for buried orebody, three dimension prospectivity modelling based on integrated geoinformation is a useful tool.However,it is still lack of systematic study on it,and the workflow and method of it remains to be further discussed.This paper proposes a relative comprehensive method and workflow of three dimension prospectivity modelling for prediction of the buried orebody,including data collection and database management,three dimension geological modelling and geophysical data integration, geologic characteristic spatial analysis and exploration criteria extraction, multidimensional and multisource data integration and prediction information sets construction and three dimension prospectivity mapping. Because this method and workflow can integrate 3D geological modeling,multidimensional spatial analysis techniques,geophysics method and prospectivity modelling,the usefulness and reliability of 3D prospectivity modelling improved effectively.In order to verify the validity of the workflow and method,this paper takes Ninwu basic as an example,based on ore field with medium scale and mining area with large scale,carries out the three dimension prospectivity modelling for buried orebodies.The workflow and method shows a good result and proves that can be efficiently used for the deep buried orebodies quantitative prediction in new and old mining area.