Geology And Geochemical Characteristics As Well As Exploration Direction Of Xia Pingyang-lingshan-koutou Region Of Hebei Province

The study area is located in the sino-korean paraplatform??₂?,shanxi lung??₂³?,five sets of the arch??₂⁹?southeast,taihang tectono-magmatic belt to the east,adjacent to zijingguan-lingshan deep fracture.The outcrops in the area are mainly early Cambrian metamorphic complex,middle and upper proterozoic and Paleozoic sedimentary strata.The medium-acidic magmatic rocks are developed with complex structure and are important prospecting sections for gold and polymetallic minerals in our province.The formation of regional deposits is mainly controlled by strata,tectonics and magmatic rocks.The metallogenic geological conditions of gold and polymetallic minerals are good.Region type gold deposits are mainly magmatic hydrothermal deposits and hydrothermal quartz vein type,main exposed mineralization favorable horizon archean fuping group in the deep metamorphic rock series and senior migmatization metamorphic rock series and the archean pingyang gneiss,mineralization distribution in the rock mass in yanshan period and the contact part of the dike and surrounding rock,the main types of pyrite mineralization and alteration.The ore body or vein usually occurs in the tectonic fracture zone.By analyzing the abundance and differentiation characteristics of soil elements in the study area,Ag and Au elements had higher concentration coefficient,indicating that these two elements had a certain tendency of secondary enrichment.The remaining elements are relatively depleted.The elements with a coefficient of variation greater than 1 are Au,W,As and Sb,respectively,indicating that these elements are distributed unevenly in the soil and tend to be enriched,which are favorable geochemical conditions for mineralization.Through the analysis of geochemical data in the study area,to determine the threshold,draw relevant datum,analyzing the geochemical features of geological unit,analysis shows that the Au,Ag and other ore-forming elements in different geological unit and the background of the whole value equal or higher than the background value,but easy to enrichment in intense magmatic activity,show that the regional ore-forming fluid is given priority to with magmatic hydrothermal origin.Regional gold deposits are mainly controlled by geotectonic environment,stratum,magmatite,tectonics and other factors.Combined with the geological background of the study area,the main prospecting areas are summarized as surrounding rock mass and surrounding vein rock.The main signs of mineralization are geochemistry,wall rock alteration and mineral fossils.The prospect of ore prospecting is analyzed through the combination of comprehensive anomalies and geological background.Combined with the study of the metallogenic geological conditions in this region,the tectonic-magma-geochemical anomalies are a significant feature of gold mineralization in this region,and magmatic hydrothermal activity is the main factor for the occurrence of series anomalies.Two mineralization prospects were delineated in this area.