The Geological Characteristics And Prospecting Direction Of Nanlongwangmiao Gold Deposits Liaoning Province

Nan Long Wang Miao gold deposits are located in the northeast of north China Craton,Liaodong anticline（Ⅱ）,Tie Ling–Jing Yu Palaeohigh（Ⅲ）.Its west links to yilan–yitong fracture,the north links to Chi feng-Kaiyuan fracture,south are connected with taizi river sag,The Hun River’s fracture is the branch of Tanlu Faults in eastern of Liaoning province that appear NEE across the district which is the level of fracture zone,Besides,It extend east into Huadian city Jilin Province.Nan Long Wang Miao gold deposits distribute in southeast Big Waste Valleys-Nan Long Wang Miao greenstone belt residual basin.Exposed layer belong to Archean group,Anshan group of South gate period,which is a set of metamorphic basic-acid volcanic rocks,volcanic scrap rock and normal sedimentary rocks,gold deposits majorly exist in the South gate group.Magmatic rocks are mainly in the late Archean new inclined long and granite porphyry,Albite porphyry,ancient Archean white mica inclined long pegmatite and phanerozoic diorite porphyrite,lamprophyre,etc.Archean TTG system fully distribute around the mining area.Mining area is located in the copper and gold deposits distributed densely NNE to Hun River faults,NW to Zhang dang-Dagujia fracture and NE to Changshan-Houshi faults,where there intersect small triangle zone.Besides natural gold in Nan Long Wang Miao gold deposits,there are main pyrite,magnetite,magnetic pyrite and chalcopyrite,There is a small amount of galena,sphalerite and molybdenite,hematite,limonite and other metal minerals,The gangue minerals are mainly quartz,feldspar,hornblende,mica,chlorite,etc.Follow by a small amount of rutile,garnet,zircon and other minerals.The structure of the ore is more granular structure,crushing structure.Ore structures are mostly fine grained disseminated,net vein and vein ore structure.Wall rock alterations are silicification,chloritization,epidotization,sericitization and pyritization,etc.In Nan Long Wang Miao mining area,hongshilazi rock gneissic granite widely developed,Belt mainly distribute in southeast,contacting with hongshilazi rock and green stone band.Geochemical studies show that hongshilazi rock is a set of high calcium sodium alkali gneissic granite.Rock is mainly for enrichment of LREE,HREE loss characteristics.In the area,Andesitic Porphyrite dikes developed,especially in mineralized belt,miter mineralization belt,closely associated with the ore body,reflect the inner link between them.Andesitic Porphyrite is a set of high sodium calcium alkaline volcanic rocks,enrichment of light rare earth elements.Through Andesitic Porphyrite chemical analysis,average gold deposit is better than the average content of the earth’s crust.Through the gold deposit of fluid inclusion research shows that the early deposit fluids have medium temperature,high salinity,middle density characteristics.Late mineralization,fluids have the characteristic of low temperature,low salinity and low density.In Nan Long Wang Miao gold deposit,δ³⁴S in Pyrite is about 1.61‰³.19‰,Variation range is very little with tower effect significantly,this feature to explain the source of the sulfur is single,its value is very small positive,extremely small,close to theδ³⁴S in Meteorites.It explains Nan Long Wang Miao gold deposit ore-forming materials are derived from the mantle source or deep;Inclusions H-O isotope determination of ore-forming fluids are between metamorphic water and atmospheric precipitation,Ore-forming fluids have mixed-hydrothermal characteristics.Nan Long Wang Miao gold deposit development is based on Archean greenstone type gold deposits.The deposit preliminary enriched across regional metamorphism,after that,a"renewable"source bed is formed.Under the action again at Archean tectonic-magmatic activity,the gold enriched in a suitable place again after the migration,forming the gold deposit whose type is ductile shear zone strata sedimentary and metamorphic hydrothermal veinlets type.The Nan Long Wang Miao gold deposit has a relatively low level of research,and the orebodies are not fully controlled along the length and inclination along the deep,and the ore-forming prospects along the ductile shear zone and the overturning direction of the ore body are better.