The Chemical Characteristics And Geophysical Characteristics And Prediction Of Metallogenic Prospect Of Earth In Western Sichuan,a Lithium Mining Area

Jiajika pegmatite type rare metal mine is China's largest solid lithium ore district,Formation of Li-Be-Nb-Ta metallogenic series.In recent years,with the increase of investment in geological prospecting in the methyl card region,Geological prospecting work extends to its periphery.In this paper,In Western Sichuan Jiajika perimeter of a lithium far scenic spot as the research object.Through the development of various geological prospecting work and Indoor analysis,Comprehensive research.It has a preliminary understanding of the geological,geophysical and geochemical characteristics of the study area.The geological,geophysical and geochemical characteristics of the area are summarized,and its element enrichment rules and combination characteristics are studied.Preliminary evaluation of metallogenic prospect is made.the results shows that:(1)The study area is located in the north east of the periphery of the rare mining area of the methyl card granite pegmatite.The transition zone between the cruciate andalusite metamorphic belt and the andalusite metamorphic zone.The relationship between the pegmatite and metamorphic belts in the methyl card mining area shows that the temperature pressure conditions in the transition zone of the metamorphic zone are favorable for the formation of the pegmatite veins of the spodumene.(2)The lithology is dominated by mica natriite pegmatite,which proves that there are pegmatite activities in this area.However,due to the serious quaternary coverage,no pegmatite vein is directly exposed to the surface.Existing data show that Quartz veins are part of the magmatic tectonic dome.They appear in the outer ring or higher layer of the dome in space.There are more quartz veins in the southwest of the study area.The pegmatite veins are buried deeper in the study area.(3)The appearance of the surface pegmatite vein rocks shows that there may be pegmatite veins in the Quaternary System in the study area.The distribution of the cruciate andalusite belt indicates that the temperature and pressure conditions are beneficial to the formation of the spodumene pegmatite.The anomalous spatial distribution of cyclic lithium elements may indicate that there is an independent granite strain in its depth.The widespread appearance of quartz veins and the distribution of the andalusite belt indicate that the denudation degree of the dome is relatively low.In summary that There is a great possibility of hidden spodumene mineralized pegmatite veins in the study area.In the future work,we can increase the input of magnetotelluric sounding(AMT)and other deep detection techniques.(4)Comprehensive research shows that The research area is located on the periphery of the Jiajika region.The data of the study show that The region has considerable potential for prospecting.In terms of geological background,geophysical characteristics and geochemical characteristics,it has a common character with Jiajika area.Comprehensive judgement is made from the aspects of topography,geological background,wall rock alteration,remote sensing,geochemical exploration and geophysical prospecting.The region has a good metallogenic prospect.