EPD & HS CONCENTRATE IN ONE MONOLAYER POLISHED SECTION (MPS). CASE - GOLD OF DIFFERENT ORIGIN
PERFECTLY LIBERATED GOLD PARTICLES IN ONE MPS - IT IS AN EASY GOAL FOR EVERY MINERALOGIST WHO HAS ACCESS TO EPD AND HS EQUIPMENT. THIS IS JUST GREAT POSSIBILITY TO HAVE ALL PRECIOUS METAL MINERALS IN ONE POLISHED SECTION AMENABLE FOR QUANTITATIVE CHARACTERIZATION, NO MATTER HOW LOW GRADE OF FINE GRAINED, NO MATTER THE ORIGIN, OR PHYSICAL PROPERTIES (DENSITY OR HARDNESS OF PRECIOUS HEAVY MINERALS VS MATRIX).
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SEM BSE images (a - Camscan MX-2500, EDX Link Pentafet, colorcoding: red – galena, 75 %; yellow – pyrite, 15 %; green – tetrahedrite, 10 %; b-f - Camscan 4DV, EDX AN-10000) of the heavy mineral HS concentrates from EPD products of Ag-Au ores: a - from Berezovsky deposit (<45 microns fraction), Urals, Russia; b - from Luopensulo deposit (<63 microns fraction), Kostomuksha area, Karelia, Russia; c, d – from Kara-Beldir deposit (c - fraction <63 microns; d – fraction 125-63 microns), Tuva, Russia; e, f – from Veladero deposit (e – ores, fraction 125-180 microns; f – silver-type ore, fraction <63 microns); Au, (Au,Ag) – native gold, Ag – native silver, AgI – iodargyrite, Ag(Cl,Br) – chlorargyrite, asp – arsenopyrite, po – pyrrhotite, gn – galena, bourn – bournonite,CuPbSbS3, brt – barite, jr – jarosite, ilm – ilmenite, zrn – zircon, q – quartz.
