Metallogenic Regularity Of Lijiapuzi Nb-Ta Deposit,Xinbin,Liaoning

The Fushun-Xinbin area in eastern Liaoning Province is a small mineralized area of rare metals.There are more than ten mineralized sites,among which only the Lijiapuzi Nb-Ta deposit has been preliminary explored.Paper that is li great niobium tantalum ore as a typical ore deposits,using field observations,the microscopic identification,reflection spectroscopy,Raman spectroscopy,X-ray diffraction(XRD)analysis and geochemical analysis of comprehensive measures,such as the occurrence state of nb-ta mineral and deposit formation is studied,the law of rare metal mineralization in the area were summarized,in order to provide reference for rare metal deposit prospecting in this area.The main insights are as follows:Eleven granitic pegmatite veins have been found in the Lijiapuzi Nb-Ta deposit,which are mainly controlled by two groups of secondary faults in the NW and NE direction.The surrounding rock of Nb-Ta granitic pegmatite dikes is composed of amphibolite gneiss,amphibolite plagioclase gneiss and amphibolite plagioclase gneiss of Shipengzi Formation of Anshan Group.Based on certain radioactive-polluted area sampling in the field,using the microscopic identification,reflection spectroscopy,Raman spectroscopy,X-ray diffraction(XRD)analysis method to study the state of nb-ta mineral,the results show that niobium ore minerals are mainly for iron ore,tantalite,sulfide,telluride tantalum lithium tantalum,etc.,more than from mica and edge albitization strong parts,mineralization intensity is closely associated with mica,albitization.Based on the analysis of geochemical characteristics,the results of major element analysis show that the ore-hosting rock mass in the study area is characterized by high silicon,rich aluminum,calcium and alkaline;The characteristics of trace and rare earth elements show that the magma has a high degree of crystallization differentiation,which mainly comes from the crust.La/Yb-Eu map indicates that the granites in Lijiapuzi area are crustal granites.Zr-TiO2 diagram shows that the granite pegmatite in the study area is S-type granite.The tectonic environment of granite formation may be in the volcanic activity area of plate margin and formed in the collision environment with orogenic.The granitic pegmatite dike is zoned with quartz→albite+muscoite+quartz→microplagioclase from the core to the outside.The core and the intermediate transition zone are the main ore-forming sites.Albitization is closely related to the formation of Nb-Ta ore.Liaodong XinBin bumps on the north and qingyuan archean granite greenstone belt of the contact zone and the south and the Paleozoic sag to the cohesion of the neoproterozoic taizi river area is niobium tantalum mineralization clusters,ore body is mainly affected by the north east and north west to the two groups of secondary fracture control,wei jing vein thickness is larger,obvious zoning,strong albitization,often in areas such as the wall rock is chloritization niobium tantalum mineralization good parts.In the peripheral area of Lijiapuzi,the geological characteristics of granitic pegritic dikes are very similar to those of the known Lijiapuzi Nb-Ta granitic pegritic dikes.XinBin convex border area,the north by a deep fault that hun river,south to,taizi river-HunJiang sag zone type granite pegmatite nb-ta vein,beryllium and white mica and other rare metal body is numerous,and with the lees great type granite pegmatite nb-ta deposit in structural control,spatial distribution of ore bodies,pegmatite strong characteristics,the alteration effect on similarity,provides a favorable target area of rare metal ore.