| At present,China's proven reserves of rare metals,especially lithium,are relatively large,which can be regarded as a "rare metal country".But at the same time,we can find that the current rare metals industry,especially lithium battery industry,electronic industry and other industries are developing rapidly.It can be predicted that in the coming decades,the demand for rare metals,especially lithium,will gradually expand in our country and even the world.This has promoted the further development of rare metal minerals,especially the mineral exploration and development of Spodumene,thus entering an industry boom period.The spodumene ore deposit in Machanggou,Jinchuan county,Sichuan province is situated in the western Sichuan region,located in the west on the edge of the Yangzi quasi to Taipei motenlin fold belt,south fold belt of west Qinling fold system,Balyanlkalla Ganzi fold system Songpan fold belt composite parts,YushuJinshajiang suture,ooze-slightly Yang deep fault zone and Longmenshan fault zone of the triangle area southeast "aba block",is a typical rare metal granite pegmatite deposit.In this article the pegmatite type especially pegmatite type of rare metals,on the basis of research results and related data,through to the Sichuan Jinchuan Machanggou spodumene ore deposit of a large number of detailed field geological work,to study the mining area of strata,rocks,structure,magmatic rocks and ore bodies and,and the relationships between the spatial distribution of mine geological characteristics of ore deposit;Based on the detailed identification and geochemical study of the interior,the main composition and structural characteristics of the ore were basically identified,and the genesis of the deposit was preliminarily discussed.(1)The rock mass which is closely related to the rare metallogenic mineralization is mainly the granite-type rock mass in the late insignia period.The rock mass is formed in five rare metal mineral concentration areas,which are located in the concentrated area of the southeast.The second cloud granite provides a material source for the deposit formation.(2)In the research area,the granule is very developed,and its interior is rich in rare metallic minerals,which are produced in the pegmatite vein.The mineralization level is mainly composed of Triassic upper Jurassic,which is filled with fissure,which is a shallow metamorphic rock,such as sandstone SLATE and SLATE.Various joints and fissures are developed in the research area,which forms the capacity space of the rare metallogenic deposits of granite pegmatite.(3)At the study area,pegmatite type is divided into five types: ?,microcline type;?,microcline sodium feldspar;?,sodium feldspar;?,sodium feldspar spodumene type;?,sodium feldspar lithium mica type.With industrial value of rare metal granite pegmatite type deposit generally distributed in albite spodumene pegmatite type belt(?),the group is divided into useful spodumene,as the main prospecting direction of rare metals in the study area.(4)In addition to the enrichment of lithium elements,other rare metal elements such as beryllium,niobium and tantalum are also fully enriched.Lithium is deposited in the lithium-pyroxene and lithium mica,the former is only of industrial value.Beryllium is one of the main associated components,and is mainly concentrated in fine crystal chlorite.The relative stability of the main rock elements,such as silicon,aluminum,potassium,sodium and iron,is not obvious in the mineralization degree of rare metals.(5)After multiple crystallization differentiation,two YunErChang granite after consolidation,residual magma through multiple stages of evolution,after sodium feldspathization,white mica and other metasomatism,enrichment of rare metals,rare metals mineral generation in great quantities,thus forming a rare metal pegmatite deposit. |
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