CAJ | 학술논문

甘肃夏河合作金富集区属秦岭造山带西段,地质构造复杂,出露地层主要有石炭系、二叠系、三叠系和古近系。燕山期、印支期中酸性岩浆侵入活动强烈,断裂构造以走向逆断层为主,次级断裂和层间破碎带发育。区内查明矿床点47处,其中大型及以上规模金矿床3处,中型3处,小型41处,显示了巨大的找金潜力。笔者应用“地球化学块体”理论和方法,对金、银、锑地球化学块体进行圈定与内部结构剖分,研究区域异常转变为局部异常、构建元素地球化学谱系树,追索各子块体浓集成矿的轨迹。通过分析,认为该区 Au 高值区面积大,各层次块体浓集趋势明显,形成 Au 地球化学省,与 Ag、Sb 块体空间叠加组合,计算出该块体500 m 以浅金资源总量1000 t,具备寻找大型超大型金矿床的地球化学块体特征。区内成矿地质条件优越,通过开展金资源潜力评价,对本区的矿产资源评价、勘查工作部署具有重要指导意义。
감숙하하합작금부집구속진령조산대서단,지질구조복잡,출로지층주요유석탄계、이첩계、삼첩계화고근계。연산기、인지기중산성암장침입활동강렬,단렬구조이주향역단층위주,차급단렬화층간파쇄대발육。구내사명광상점47처,기중대형급이상규모금광상3처,중형3처,소형41처,현시료거대적조금잠력。필자응용“지구화학괴체”이론화방법,대금、은、제지구화학괴체진행권정여내부결구부분,연구구역이상전변위국부이상、구건원소지구화학보계수,추색각자괴체농집성광적궤적。통과분석,인위해구 Au 고치구면적대,각층차괴체농집추세명현,형성 Au 지구화학성,여 Ag、Sb 괴체공간첩가조합,계산출해괴체500 m 이천금자원총량1000 t,구비심조대형초대형금광상적지구화학괴체특정。구내성광지질조건우월,통과개전금자원잠력평개,대본구적광산자원평개、감사공작부서구유중요지도의의。
Au enrichment zone in Xiahe-Hezuo of Gansu Province is located in the west section of Qinling orogenic belt,where the geological condition is complicated,with major outcropped stra-ta including Carboniferous,Permian,Triassic and Paleogene.In Yanshanian and Indosinian,the intermediate-acid magma intrusive activity is intensive.The faults are mainly overthrust strike-slip faults,with occurrences of secondary fractures and interlayer fracture zones.47 mineral spots were identified,among which there are 3 large-scale occurrences,3 middle-scale and 41small-scaledeposits,indicating great potential for prospecting.Based on the theories and method of geochemical blocks,the authors confirmed geochemical blocks of Au,Ag,Sb and anatomized its structure with GeoMDIS and geochemical data handling.Abnormity conversion from regional to local was studied,family tree of elements geochemistry was established,and the mineralization track of each sub-block was recovered.Results show that the high Au value area is large;blocks of each level concentrate significantly to form Au geochemical province,which is spatial overlaid and combined with Ag and Sb blocks.It is calculated that the total of light gold within 500 m is 1000 t,with the geochemical block characteristics of large and ultra-large gold deposit.The ore-forming geological conditions in the study area is favorable;evaluation on Au resources potential has important significance for mineral resources evaluation and exploration.