Useful Information

Jan 11, 2021

Gold Conversion Factors

1 ppb	0.001 g/tonne
1 ppm	1 g/tonne
1 oz/ton	34.286 grams/tonne
1 gram/tonne	0.0292 oz/ton
1 gram/m³	0.0421oz/yd³

Grain Size (Diameter)

Gravel	2 to 4 mm
Sand	63 µm
Silt	4-63 µm
Clay	<4 µm

Химийн хөрвүүлэлт

Element	Compound	Factor
Al	Al2O3	1,889
Ba	BaSO₄	1,699
Ca	CaO	1,399
CaO	CaCO₃	1,785
CaO	CaSO₄	3,397
Ca	CaF₂	1,948
CaO	CaF₂	1,392
Cr	Cr₂O₃	1,462
Fe	FeO	1,286
FeO	Fe₂O₃	1,111
Fe	Fe₂O₃	1,43
K	K₂O	1,205
Mg	MgO	1,658
Mn	MnO	1,291
Mo	MoS₂	1,668
Na	Na₂O	1,348
P	P₂O₅	2,291
S	SO₄	2,996
Sr	SrSO₄	2,096
Th	ThO₂	1,138
Ti	TiO₂	1,668
U	U₃O₈	1,179
W	WO₃	1,261
V	V₂O₅	1,785
Zr	ZrO₂	1,35

Common Tyler Sieve Sizes

Mesh	Aperature µm
10	1 680
20	841
35	420
60	250
80	177
100	149
150	105
170	88
200	74
250	63
270	53
325	44
400	37

Ore Content

1% Cu	2.89% CuFeS2 (chalcopyrite)
1% Mo	1.67% MoS2 (molybdenite)
1% Pb	1.15% PbS (galena)
1% U	1.18% U3O8 (pitchblende)
1% W	1.26% WO3 (scheelite)
1% Zn	1.49% ZnS (sphalerite)
1% Fe	2.15% FeS2 (pyrite)
1% Fe	1.57% FeS (pyrrhotite)
1% Fe	1.38% Fe3O4 (magnetite)
0.1% U3O8	2 lbs/ton U3O8