Geological Characteristics And Genesis Of The Naxiguole Iron Deposit In The East Kunlun Mountains Metallogenic Belt

The Naxigele Iron Mine is a newly discovered sedimentary metamorphic iron ore deposit in the Jinshuikou rock group in the Qimantage area of the East Kunlun Mountains since 2013.According to the research results of the Naxiolle deposit,the research work of the thesis was carried out,and the genesis,metallogenic age and metallogenic process of the Nishiolle sedimentary metamorphic iron deposit were summarized,and the metallogenic model was established.In general,the ore body output is controlled by the stratum,and the mineralization has experienced three stages:the hot water jet deposition period,the metamorphism period and the tectonic-magmatic deformation-reconstruction period.Deposition of iron and hot water deposits of siliceous,terrigenous clastics and carbonates during hot water jet deposition,Iron is derived from hot water jet deposition;During metamorphism,the minerals recrystallize along with the surrounding rock,causing changes in mineral morphology and particle size,but no chemical components are replaced;Tectonic-magmatic deformation-reconstruction period ore body shape is reconstructed by tectonic or magmatic action,Certain changes in the thickness and continuity of the ore body.The genesis of the deposit belongs to sedimentary metamorphism.Through the study of the original rock recovery and tectonic setting,the Jinshuikou rock group was constructed as clastic rock+carbonate rock,which was formed in the Paleoproterozoic active continental margin volcano-hydrothermal sedimentary basin.LA-ICP-MS analysis was performed by selecting 50 zircons from the sample.NX-PM2-02 sample zircon age frequency distribution curve,Most of the data is concentrated in 805⁹90Ma.NX-J01 sample zircon age frequency distribution curve,Most of the data is concentrated in 821⁹81Ma.This age value reflects the tectonic convergence events in the Late Neoproterozoic-New Neoproterozoic in the East Kunlun area and is an important tectonic event in the Precambrian evolution history of the East Kunlun area;In the NX-PM2-02 sample zircon ²⁰⁶Pb/²⁰⁷Pb surface 2200Ma²400Ma,there are two measuring points,which is a record of the Late Archean tectonic thermal events in the East Kunlun area,which may represent the source upper age of gneiss.The age of the"Jinshuikou Group"is ancient Proterozoic.Based on the analysis of the characteristics of the Naxiolle iron deposit,the Naxiguole iron deposit is more in line with the characteristics of the Superior BIF iron deposit in the sedimentary environment and sedimentary strata.Therefore,the comprehensive analysis believes that the Naxiolle iron ore mine is a Superior BIF iron ore.