| Eastern Liaoning-Southern Jilin metallogenic belt is located between archaeozoic Longgang block and Langlin block, which is superimposed parts of circum pacific tectonic domain and Paleoasia oceanic tectonic domain. It extends in W-E with plenty of mineral resources. According to analysis of metallogenic belt basic material, combining with the typical ore deposit in the belt, then summarizing up of metallogenic regularity, studying metallogenic prognosis of metallogenic belt at last.Mineralization are mainly controlled by the formation lithology, structure and magmatic rock, according to analysis of geological background of metallogenic belt. Liaoning-Jilin paleoproterozoic rift basin is an important regional ore-controlling condition. The space, time, material combination of deposit is close and internal genetic relationship with volcanism, volcanic blowpiping, sedimentation. Most deposit is always controlled by fold structure. Large and medium-sized gold polymetallic deposit is controlled by the intersection of the two sets of fault zone faults in Liaoning-Jilin paleoproterozoic metallogenic belt. Northern Liaohe group/Laoling group, southern liaohe group/Jian group of Paleoproterozoic strata is provide the material source and metallogenic environment for mineralization. Basin marginal fracture structure is provide the ore-fluid channel way and metallogenic location for mineralization in the region, especially the synsedimentary fault. The indosinian and yanshan interim acid intrusive body is provide some substance sources, media sources and heat source for gold metallogenic.Analyzing and summarizing the typical ore depositin the belt which includes Dahenglu cobalt (copper) deposit, Gaojiabaozi silver deposit, Wulong gold deposit, Jiapigou gold deposit. Mineralization mainly happened in the paleoproterozoic and Mesozoic (yanshan period).Almost deposit belongs to the production of Liaoning-Jilin rift gold polymetallic metallogenic system. The host rocks main control some types of mineral metallogenic space and the location. Gold deposit is slight related to stratigraphic, it depend on later metallogenic ore-controlling factors, such as late metamorphism, tectonic activities, magmatism. They always mineralize in the process of superposition, that formed the typical sedimentary-metamorphic-hydrothermal transformation type depositThis paper sums up the regional metallogenic regularities, through system researching and field investigating the typical ore deposit and geological background of the belt. A the spatial distribution rule:deposit swarms and outputs together in the belt, mineralization is uneven distribution and concentration distribution, at the same time there is the regularity that two or more than two mineralization closely associated. All of them lead to form different ore deposit and deposit metallogenic series in different location. B metallogenic time:various deposit and deposit metallogenic series form in a certain chronological order in Liaoning-Jilin paleoproterozoic metallogenic belt. C the metallogenic matter origin: it is obvious characteristics of multiple source, mix source, which includes mantle (deep source) source and crustal source. D mineralization:it mainly includes the volcanism relevant blowpiping-hot water depositional mineralization, hydrothermal sedimentary mineralization, Sedimentary-rock dehydration mineralization, regional metamorphism and deformation hydrothermal superimposed mineralization, magmatic hydrothermal superimposed mineralization.This paper divides and evaluates metallogenic prospective area, combining with metallogenic law of metallogenic belt to study metallogenic prediction in the belt, according to the regional geological, geophysical and geochemical data. All that is provide working basis for gold polymetallic mineral exploration work... |
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