Analysis Of Ore-controlling Factors And Prospecting Prediction Of Deshenggou Tungsten-copper Deposit In Maguan County, Yunnan

Deshenggou Tungsten-copper deposit is located about 10km east of Maguan County,and is located at the junction of the Funing-Napo passive continental margin and the Dulong metamorphic core complex.The lithology of the strata in the mining area is mainly the quartz mica schist of the Xinzhai Formation in the Upper Proterozoic.The structure is mainly dominated by F₀ stripping fault and NE-trending fault;The magmatic rocks are mainly the Late Silurian?S₃?gneissic medium-fine grain granite and the Yanshanian Laojunshan granite??₅³?.As it is located on the west side of the Laojunshan metallogenic area in southeastern Yunnan,it has good prospects for the prospecting of copper and tungsten.Based on the theory of structural geology and mineral deposits,The project has carried out detailed investigation and exploration work in the Bumang,Tianfang and Gaojinggou sections,and implemented geological mapping,rock and mineral analysis and testing,Pb isotopes,Sm-Nd isotopes and other working methods.A detailed comprehensive study on the ore-controlling factors and prospecting prediction of the Deshenggou tungsten-copper deposit in Maguan County,Yunnan Province has achieved the following major findings and achievements:1.The orebodies are controlled more obviously by F₀ exfoliation faults,The ore body mainly exists in the Xinzhai Formation?Pt₃x?above the stripping fault and the top of the S₃T gneiss,Gneissic granite under the stripping fault,layered,laminar distribution.The main useful metal minerals in ore are chalcopyrite,scheelite,galena,sphalerite,cassiterite,pyrite,pyrrhotite,arsenopyrite,etc.;ore is semi-automorphic and self-crystal The main structure,its crystal structure,followed by the gel-gel structure;common star spots,spots,spots,sparse dissemination,block,fine veins-strip,mesh,angle Gravel and other structures.2.The granitic magmatism of the Caledonian Late Silurian TuanTian Unit?S₃T?provides a source of some materials for the copper and tungsten deposits in the mining area,thus forming an initial enrichment of ore-forming elements such as copper and tungsten;In the Indosinian period,Fe,Cu,Pb,Zn,W and other metal sulfides were mineralization along the stripping fault system.The Yanshanian ore-bearing magma hydrothermal fluid migrated and replaced along the weak parts of the stripping fault.Filling,filling and reforming the pre-existing mineralization,finally forming tungsten and copper polymetallics Mineral deposit in the Xinzhai Formation stratum?Pt₃x?,the lower section of the Tuantian unit?S₃T¹?and the lateral faults in the upper and lower parts of the stripping fault.The genetic type of the deposit should be a magmatic hydrothermal filling and replacement type tungsten-copper deposit.3.Through the research,it is considered that in addition to the discovered ore sections,the rest of the mines also have the prospect of finding copper and tungsten polymetallic mineralized bodies,which can be divided into two prediction areas A and B,and the preliminary prediction zone is carried out.The project verified that the mineralization horizon can be as long as 7km.It provides certain guiding significance for the next exploration work of the mining area.