The Study On Lithium-enrichment Characteristics Of X03 Pegmatite In Jiajikak Of Sichuan

The Sichuan Jiajika pegmatite type deposit is China’s largest lithium ore accumulation area.The deposit is located in the Songpan Ganzi orogenic belt, formed in the Mesozoic era, has the characteristics of deposit scale belt, variety complete, is the ideal object region of pegmatite.The X03 pegmatite veins is a new discovery of oversize of lithium in the mining area, its material composition and element enrichment law is not clear, at present, the research of the degree of pegmatite veins is very low.The author based on field geological survey and geological characteristics of the deposit has collecting mineral samples systematically, do the work of testing to research on the X03 pegmatite vein mineralogy characteristic research and pegmatite lithium enrichment law research.Through the research obtained the following understanding:In the X03 pegmatite vein, Lithium concentrate with high quality have independent development value and the Other rare elements(such as Rb, Nb, TA) enrichment degree is also the associated quality requirements, have great value to exploit and utilize. Pegmatite veins in the structure with the higher concentration of lithium enrichment, including comb spodumene pegmatite with lithium enrichment of element concentration is highest; but the structure plays a dominant role in veins with containing fine grained spodumene pegmatite zone. Lithium mainly as independent minerals spodumene(main) enriched in the pegmatite veins, a small amount in the form of ions dispersed in mineral tourmaline, mica, feldspar, quartz, niobium tantalum ore, garnet etc.The structure with the main minerals, the same mineral in different parts of the output, with certain differences in the lithium content, but different rock forming minerals in the same structure belt did not show certain regularity.The element lithium in three-dimensional space pegmatite veins on the enrichment characteristics are shown as: along the lode, Li2 O enrichment for the performance of the middle is rich,but two end is poor; along the thickness direction,the veins, the mineralization enrichment regularity is not obvious, relations between rich and poor was shock changes; along the inclined direction, Li2 O enrichment and thickness to the square to the changes in the same.