吉黑东部地区金矿资源禀赋及成矿规律特征

GOLD RESOURCES ENDOWMENT AND METALLOGENIC REGULARITY IN EASTERN JILIN AND HEILONGJIANG PROVINCES

金矿是吉黑东部地区的优势矿种之一,资源丰富、类型多样.通过系统收集和整理已有金矿地质资料,全面总结了吉黑东部地区金矿资源禀赋、矿床类型、控矿因素、时空分布规律、成矿演化及资源潜力,将研究区金矿床划分为6种成因类型、48个主要预测类型和5个成矿期.研究区金矿主要产出于经历多期次构造运动和频繁岩浆活动的活动大陆边缘和岛弧(火山弧)等构造单元内,特别是华力西期—燕山期大规模的构造、岩浆活动是金矿床形成的重要控制因素.通过总结上述成果,在研究区划分出34处金矿重要找矿远景区,明确了研究区金资源潜力和找矿方向,并提出加强重要找矿远景区及已知矿床深边部和外围金矿资源勘查是实现找矿突破的重要途径.

Gold is one of the dominant minerals in eastern Jilin and Heilongjiang provinces,with abundant resources and multiple types.Through systematic collection and sorting of the existing geological data of gold deposits,the paper comprehensively summarizes the resources endowment,deposit types,ore-controlling factors,spatiotemporal distribution rule,metallogenic evolution and resources potential of gold deposits in eastern Jilin and Heilongjiang provinces.The gold deposits in the area can be classified into 6 genetic types,with 48 main prediction types in 5 metallogenic periods.The gold deposits are mainly occurred in such tectonic units as active continental margin and island(volcanic)arc which have experienced multistage tectonic movements and frequent magmatic activities,especially the Variscan-Yanshanian large-scale tectonic and magmatic activities are important controlling factors for gold deposit formation.By summarizing the above results,34 important prospecting potential areas for gold deposits are identified in the study area,and the gold resources potential and prospecting direction are defined.It is proposed the way to achieve prospecting breakthrough by strengthening exploration in key prospective areas and beneath and around the known gold deposits.