吉林集安古马岭金矿区控矿条件与靶区预测

Ore-controlling condition and target prediction of Gumaling gold deposit in Ji'an,Jilin province

古马岭金矿区是吉林省东南部重要的金成矿区之一,通过该区控矿地质条件的研究,结合水系沉积物测量、土壤地球化学测量、岩石地球化学测量及地球物理激电扫面开展靶区预测及找矿工作。研究表明:大东岔组片麻岩段应为金的矿源层,矿化带的宽度与金矿带的数量及品位成正比,断裂发育地段或不同方向断裂交汇部位是金的有利富集部位,晚侏罗世细粒闪长岩对矿区内金元素的富集提供热源和载体的作用,物化探异常与已知矿化蚀变带吻合较好。在此基础上,圈定A类预测区2处(其中包括高丽墓沟金矿床),B类预测区1处,C类预测区2处。

The Gumaling gold deposit is one of the important gold deposits in southeast Jilin province.Based on the ore-controlling geological conditions research of the area,the target prediction and prospecting is carried out combining with the stream sediment survey,soil geochemical survey,lithogeochemical survey and geophysics IP scanning work.Studies show：the Dadongcha group gneiss paragraph is the gold ore source bed;and the mineralized belt width is proportional to the gold belt quantity and grade;faults and fault intersections in different directions is the gold enrichment sites;late Jurassic fine-grained diorite provides heat and carrier for the gold element enrichment.Geophysical and geochemical anomalies accord with the known mineralized alteration belts.2 A class prediction area（which includes the Gaolimugou gold deposit）,1 B class and 2 C class prediction district are delineated.