CAJ | 학술논문

在分析新疆托里地区铜金矿成矿特征的基础上，结合与成矿有关的地层、构造、岩浆岩、化探、物探、遥感蚀变异常等12个证据专题图，借助 GIS 空间分析与建模工具，利用改进证据权重法建立了区域铜金矿找矿模型。按照已知矿点储量的大小设置正权重值并结合专家经验修正。基于不同尺寸矩形评价单元进行对比实验，确定了最优的评价单元尺寸为1．25km×1．25km。利用该模型计算了研究区成矿后验概率图，并依据后验概率的相对大小将成矿远景区分成三级，共圈定8个成矿远景区并对其进行了验证，结果表明与改进前的证据权重法相比，该方法的准确率提高了5．85％。本文提出的方法为矿产资源的定量化勘查与预测提供了先进的模型支持与科学依据。
재분석신강탁리지구동금광성광특정적기출상，결합여성광유관적지층、구조、암장암、화탐、물탐、요감식변이상등12개증거전제도，차조 GIS 공간분석여건모공구，이용개진증거권중법건립료구역동금광조광모형。안조이지광점저량적대소설치정권중치병결합전가경험수정。기우불동척촌구형평개단원진행대비실험，학정료최우적평개단원척촌위1．25km×1．25km。이용해모형계산료연구구성광후험개솔도，병의거후험개솔적상대대소장성광원경구분성삼급，공권정8개성광원경구병대기진행료험증，결과표명여개진전적증거권중법상비，해방법적준학솔제고료5．85％。본문제출적방법위광산자원적정양화감사여예측제공료선진적모형지지여과학의거。
Based on the analysis of metallogenetic characteristics of the gold and copper deposits on Tuoli area,twelve evidence layers,related to mineralization,including the information of the strata,structures,magmatites,geophysical anomalies, geochemical anomalies and remote sensing alteration anomalies,were acquired and processed.Using GIS spatial analysis and modeling tools,a regional copper prospecting model based on improved weight evidence method was established.In accordance with the size of known mines positive weights were set and amended with expert experience.Comparative experiments based on rectangular evaluation units in different sizes were implemented to determine the optimal unit size as 1.25km×1.25km.Using the model,the mineralization posterior probability map in the study area was generated.According to the posterior probabilities, three-grade prospective subareas have been classified and eight metallogenetic target areas have been outlined with verifications implemented.The results show that compared with the original method,this method can improve the accuracy of 5.85%.The method proposed in this paper provides an advanced model support and scientific basis for the quantification and prediction of mineral resources exploration.