Heavy-Fluid Separation of the North Caka Mountain Stream Sediment and its Significance to Search Pegmatite Lithium Ore
The pegmatite deposit is one of the important sources of lithium.Due to the heterogeneity in time,space,and structure,the exploration of pegmatite deposit is difficult.During the migration process,the stream sediment could retain mineral information about the source area.Therefore,analyzing the elements and minerals of the stream sediment can reconstruct the composition characteristics of the source area.One of the effective methods to searching for pegmatite lithium deposits is to investigate the depletion and en-richment of lithium heavy minerals in the stream sediment,as well as changes in particle size.The research object of this article is the stream sediment of the North Caka mountain.After refined heavy-fluid separation work,the separation of heavy and light minerals has been achieved.Experimental results indicate that the heavy-fluid separation method has an enrichment effect on lithium minerals in sediment.Fluvial processes can influence the lithium in stream sediments.With the farther the transport distance,the less lithium in the stream sediments.Stream mixing can have a positive effect on the lithium in stream sediment.The carrier of lithium is mica minerals those enrich lithium.The lithium content increases by 3 to 14 times compared to be-fore sorting,and there is a significant difference in mineral composition after sorting.This change can find lithium bearing pegmatite minerals.Therefore,the heavy-fluid separation of stream sediment is an important indicator method for the exploration of pegmatite lithium ore.
North Caka mountainPegmatite lithium oreStream sedimentHeavy-Fluid separationGeochemical prospecting
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