山东栖霞—大柳行地区金矿资源潜力评价

栖霞—大柳行地区位于胶东中部栖霞—蓬莱金矿成矿带内,是胶东重要的金成矿区,成矿条件优越。基于综合信息成矿系列预测方法,对该区进行金矿资源量预测。通过收集本区地质、构造和物化探等综合信息,对成矿背景进行总结,选用特征分析法对预测变量进行优选;对研究区划分了4个矿田级金矿成矿预测区、27个最小预测单元,然后采用地质体体积法进行资源量估算,为本区提供金矿勘查的靶区。其中,4个矿田级预测区内的27个最小预测单元分别为A级区(成矿条件优越)8处,B级区(成矿条件良好)12处,C级区(成矿条件一般)5处和D级区(成矿条件较差)2处。根据预测结果,在研究区共圈定27个找矿靶区,共预测(334?)金金属量2810380 kg,包括已查明的金资源储量3106321 kg和未查明预测(334?)金金属量24140510 kg。

Evaluation of Gold Resource Potential in Qixia-Daliliuxing Area,Shandong Province

Jiaodong area is the largest gold-producing area in China,and its gold prospecting has been receiving great attention.Among them,Qixia-Daliuxing area is located in the Qixia-Penglai gold ore metallogenic belt in central Jiaodong,which is an important gold metallogenic area in Jiaodong.Based on the basic geological data,research degree and geological conditions in this area,this paper conducts prediction and evaluation of mineral resources.The gold resources in Qixia-Daliuxing area were predicted by the integrated information mineralization series prediction method.Compared with other methods,this method can make full use of relevant geological data,and has a targeted extraction of geological information.At the same time,it has a stronger ability to comprehensively use computers for calculations,and can carry out more three-dimensional research.Therefore,it’s better to guide the prospection in this area.In this work,the formation mechanism,metallogenic regularity,orecontrolling conditions and prospecting indicators of the gold deposits in Daliuxing-Qixia area were summarized through in-depth analysis of a large amount of data obtained,combined with typical deposit research.Comprehensive geological,geophysical and geochemical information was used to guide the prediction of mineralization in the area and the prediction of deep and edge mineralization of known deposits.We analyzed the gold ore metallogenic model and regional metallogenic model by research of typical ore deposits.Based on the metallogenic factors in the Daliuxing-Qixia area,combined with regional metallogenic regularities,orecontrolling conditions,metallogenic geological conditions and types of deposit genesis,the geological forecasting factors were divided and the prediction model was established to further accurately predict the resource potential of the ore-exploring target area.The qualitative prediction,quantitative prediction and extrapolation estimation of the gold resources in the study area were carried out by using feature analysis method,comprehensive geological information method and limited extrapolation of known borehole data.The study area is divided into 4 orefield-level gold deposit metallogenic prediction areas and 27 minimum prediction units,and the qualitative prediction is mainly based on the feature analysis method.There are 8 A-level areas,12 B-level areas,5 C-level areas and 2 D-level areas.The geological body volume method was used to predict the resource amount.A total of 27 prospecting target areas are delineated in the study area.The predicted amount of gold metal(334?)was 2810380 kg,including the identified gold resource reserves of 3106321 kg and unidentified forecast gold metal quantity(334?)of 24140510 kg.