Study On Metallogenic Features And Metallogenic Prediction Of Gold And Polymetallic In Xinglin Forest Farm,Dashigou-Tangyuan County,Yichun City,Heilongjiang Province

The site structure of Xinglin Forest Farm in Dashigou-Tangyuan County,Yichun City is located in the Fengmao-Yabuli Geosyncline fold belt(Grade II tectonic unit),and the Dongfengshan Group is hosted by a metamorphic deposit of iron,gold(cobalt)deposits.-2).At present,many metals,nonmetallic deposits,mineralized points and mineralized information have been found in the region,including iron and Jin Jijin polymetals,and the main types of the deposits include sedimentary metamorphic,skarn and hydrothermal types.In this paper,the relevant geological and mineral resources in this study area have been systematically collected,Comprehensive study of ore controlling geological factors in the study area,material,chemical,remote and exploration engineering,and the strata,magmatic rocks and metamorphic rocks in the study area are deeply studied and redefined.On the basis of studying and summarizing the geological features of the deposit in the study area,the genesis of the deposit,the metallogenic regularity and the prospecting marks,the following understanding has been obtained in combination with the achievements of the predecessors.The gold deposits in the area are mostly hydrothermal deposits,which are distributed in different rocks such as metamorphic rocks,granites and dikes,and are controlled by structural fractures.The ore bodies of the Dongfeng mountain gold deposit are divided into two types of cobalt gold deposits and gold bearing quartz veins.The gold deposits of cobalt gold deposits are generally found in the banded black pomegranate angled and strip magnetite hornblende hornblende,and the gold bearing quartz vein type gold bodies are often produced from the gold bearing black pomegranate angled rocks.Cut through the parts.The ore body is produced in the North East anticline structure composed of the Dongfeng mountain rock group,which develops along the anticline axially,and the West Wing of the anticline concentrates the large scale cobalt gold ore body and the East Wing sporadic distribution contains the gold ore vein type orebody.According to the symbiotic assemblage of ore minerals,gold deposit state and structural structure of gold bearing minerals,the ore containing iron ore deposits in the region is divided into two kinds of sulfide cobalt gold type and quartz vein type.The metallic minerals of sulfide cobalt gold ore mainly include cobalt ore,pyrrhotite,arsenopyrite,pyrite,magnetite,ilmenite,natural gold and silver gold.The gangue minerals are mainly quartz,garnet,ferric amphibole,carbonate and mica,and quartz vein ore has a simple mineral composition and the metal mineral is mainly magnetic pyrite.Ore,a small amount of pyrite,brass and natural gold,etc.gangue minerals are mainly quartz and feldspar.The sedimentary metamorphic iron deposits in the area are produced in the Liangzi river rock group of the Dongfeng mountain group in the ancient Proterozoic.The iron deposits are mostly layered,and the iron bearing layers are located in the sericite quartz rock strata below the Dali strata.Attention should be paid to finding such deposits in Liangzi River formation.The iron deposit is mainly distributed in the ne metallogenic belt and distributes along the NE trending structure.The results of high magnetic measurement in the study area are analyzed,8 magnetic anomalies and 9 linear structures are interpreted.The results show that the anomalies of M7,M11 and M12 are ore induced anomalies.NW and near SN structure constitute the basic tectonic framework of the mining area,which is a favorable metallogenic area.The Bouguer gravity anomaly contours are locally located in the same direction,which is an important prospecting area.According to the soil geochemical data of 1:5 million in the study area,the anomalous distribution of the study area is uneven.Cluster analysis showed that Au was closely related to Mo,As and Sb.There are 396 abnormity elements in the common ring,including 56 Au exceptions,65 abnormal combinations,and abnormal checking.On the basis of deposit geology and previous research,the metallogenic model and ore prospecting model are established.According to regional geophysical prospecting,geochemical exploration results and abnormal verification,2 gold and third grade metallogenic distant scenic spots are finally circled,and two key prospecting target areas have been confirmed through engineering verification.