Meta分析在深部找矿预测中的应用--以铜陵铜山铜矿为例

Application of Meta-Analysis to Deep Prospecting Predictions:An Example from the Tongshan Copper Deposit,Tongling,Anhui Province

为了深入研究找矿技术方法的优选和集成,引入了"有效性"的概念来衡量某种探测技术方法的找矿预测效果。Meta分析是一种起源于医学领域,对具备特定条件的、同类研究主题的大量研究结果进行综合后统计的超常规综合统计方法。文中对引入Meta分析的思路和可行性充分分析论证后,以铜山铜矿为例,首次应用Meta分析方法对CSAMT,TEM,EH4三种物探方法所获得的二维反演剖面进行了三种方法找矿预测的有效性定量对比研究。结果表明,在铜山铜矿前山南测区,CSAMT法与EH4法的找矿预测有效性比TEM法明显要高;而CSAMT法和EH4法的找矿预测有效性没有明显差异。

A new concept of effectiveness was introduced in this paper to evaluate the prediction effect of a detection technology so as to acquire the optimization and integration of technologies for ore exploration. Meta-analysis, initially used in medical science, is an unconventional statistical method that makes comprehensive analysis and statistics on various results of researches on the same subject with specific constraints. In this paper, the principle and feasibility of the Meta-analysis was first studied and then, as a case study, applied in metallogenic predictions in Tongshan copper deposit by quantitative comparison on the effectiveness of prediction of 2-D inversion sections from three geophysical techniques, i.e. CSAMT, EH4 and TEM by Metaanalysis. It is shown that CSAMT and EH4 are much more effective than TEM, though there is no apparent difference in the prediction effectiveness between CSAMT and EH4.