辽东-吉南成矿带金矿成矿规律及资源潜力分析OA

The Liaodong-Jinan metallogenic belt is one of China's important gold concentration zones.This study aims to enhance the understanding of gold metallogenic regularity and to assess the resource potential,which attempts to support regional mineral exploration planning.It systematically integrated geological data on gold deposits within the area and comprehensively investigated their ore-hosting characteristics and metallogenic patterns.Furthermore,based on multi-source geophysical,geochemical,and remote-sensing information,the study delineated prospective target areas and minimum prediction units.The geological volumetric parameter method was then employed to estimate resources.The results show that:(1)Gold deposits in this belt can be classified into four genetic types:magmatic-hydrothermal,metamorphosed,placer,and superimposed(composite reworked)types.(2)Spatially,the gold deposits are mainly distributed in two third-order tectonic units—the Liaoji continental rift basin(Pt₁)and the Longgang paleo-magmatic arc(Ar ₃)as well as within two fourth-order metallogenic belts:Tieling-Jingyu and Yingkou-Changbai.(3)Metallogenic epochs are concentrated in three peak periods:Neoarchean,Late Triassic-Early Cretaceous,and Quaternary.The Paleoproterozoic source beds provided main material for Mesozoic gold mineralization.(4)A regional gold metallogenic lineage has been established,comprising five metallogenic series,ten subseries,and 18 deposit models.A total of 22 prospecting target areas and 59 minimum prediction units have been delineated in the entire region,with an estimated gold resources exceeding 1,600 tons.This study provides an important scientific basis for further scientific research and exploration planning of gold deposit in the metallogenic belt.