GEOCHEMICAL METHOD OF PROSPECTING Russian patent published in 2008 - IPC G01N1/28 G01V9/00 

FIELD: prospecting.

SUBSTANCE: during geochemical prospecting samples are taken in the area of the assigned network out of the representative formation of loose deposits below the strata enriched with organic material or characterised by intensive desalination of metals or carry-over of superfine fraction of solid particles. Fragments of crystal materials larger than 1- 2 cm and organic remains are removed out of the samples in the place of sampling. The samples are dried under the conditions that exclude dust emission or contacts of the sample material. Next superfine fractions of solid particles under 10 mcm are extracted under laboratory conditions. For this purpose the dried sample is placed into a bin, which is shaken up on a vibrating platform with simultaneous pumping of air out of the bin. The particles carried over by the air flow are captured by air filters, and they are collected from the filters for precision analysis of the content of chemical elements. By the results of the analysis secondary lithochemical haloes and stray fluxes in the superfine fraction of loose deposits are determined by abnormal content of chemical elements determined. Conclusions on availability and characteristics of ore mineralization zones are made by availability and parameters of secondary lithochemical haloes and stray fluxes. These operations increase feasibility and accuracy of selection of the representative stratum for taking samples and the capacity of separation of superfine fraction for determination of the content of chemical elements.

EFFECT: method enables to increase the efficiency of geochemical prospecting of non-ferrous, rare and precious metals in closed and semi-closed areas.

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