MASS AND GRADE CONVERSION FACTORS

1 Troy Oz 31.1035g

1g 0.03215 Troy Oz

1 Short Ton 2000lb 907.2kg 0.9072t

1 Long Ton 2240lb 1016kg 1.016t

1t 2204.6lb 1102.3 Short Ton 0.9843 Long Ton

1g/t 1ppm 1mg/kg

1% 10,000 ppm

1ppm 1,000 ppb

1ppb 1,000 ppt

ST = Short Ton LT = Long Ton t = Metric Tonne

% ppm (g/t)

Troy Oz / LT

Troy Oz / ST

Troy Oz / t

0.0001 1 0.0327 0.0292 0.0322

0.00306122 30.6122 1 0.8929 0.9842

0.00342857 34.2857 1.1199 1 1.1023

0.00311035 31.1035 1.0160 0.9072 1

TechnicalNote

ELEMENT TO OXIDE COVERSION FACTORS

Element Oxide Factor Element Oxide Factor

Al Al2O

31.889 Na Na

2O 1.348

Ba BaSO4

1.699 Nb Nb2O

51.431

Ca CaCO3

2.497 P P2O

52.291

Ca CaO 1.399 Si SiO2

2.139

Cr Cr2O

31.462 Sn SnO

21.270

F CaF2

2.055 Sr SrO 1.183

Fe FeO 1.287 Ta Ta2O

51.221

Fe Fe2O

31.430 Th ThO

21.138

Fe Fe3O

41.382 Ti TiO

21.668

K K2O 1.205 U U

3O

81.179

Mg MgO 1.658 V V2O

51.785

Mn MnO 1.291 W WO3

1.261

Mo MoS2

1.668 Zr ZrO2

1.351

MEDIAN BACKGROUND VALUES FOR SELECTED ELEMENTS (ppm)

Element Granite Sedimentary Rocks

Soil Element Granite Sedimentary Rocks

Soil

Ag 0.037 - 0.051 0.01 - 0.07 0.1 Ni 4.5 - 15 2 - 68 17

As 1.5 - 2.1 1 - 13 7.5 Pb 15 - 19 9 - 20 17

B 9 20 - 100 29 Rb 110 - 170 3 - 140 35

Ba 420 - 840 10 - 580 300 Re 0.0006 0.0001 - 0.0005 0.005

Bi 0.01 - 0.3 0.3 - 1.0 0.8 S 0.03% 0.02 - 0.25% 0.01 - 0.1%

Cd 0.13 0.01 - 0.3 0.1 - 0.5 Sb 0.2 <1 2

Ce 81 - 92 11 - 92 28 Se 0.05 0.05 - 0.6 0.31

Co 1 - 7 0.1 - 19 10 Sn 1.5 - 3.0 0.1 - 6.0 10

Cr 4.1 - 22 11 - 90 43 Sr 100 - 440 20 - 610 67

Cs 2 - 4 0.1 - 5 6 Te ~0.02 ~0.02 0.001 - 0.01

Cu 10 - 20 1 - 45 15 Tl 0.72 - 2.3 0.01 - 1.4 0.1

Hg 0.02 - 0.04 0.03 - 0.4 0.056 V 44 - 88 20 - 130 57

Mn 390 - 540 100 - 1100 320 W 1.5 0.5 - 1.8 1

Mo 1.3 0.2 - 1.6 2.5 Zn 39 - 60 16 - 95 36

TYPICAL APERTURES IN LABORATORY SIEVES

Sieve size (mm)

BSS Tyler (approx) US (approx)

4.75 - 4 4

3.35 5 6 6

2.81 6 7 7

2.38 7 8 8

2 8 9 10

1.68 10 10 12

1.4 12 12 14

1.2 14 14 16

1 16 16 18

0.853 18 20 20

0.71 22 24 25

0.599 25 28 30

0.5 30 32 35

0.422 36 35 40

0.354 44 42 45

0.297 52 48 50

0.251 60 60 60

0.211 72 65 70

0.178 85 80 80

0.152 100 100 100

0.125 120 115 120

0.104 150 150 140

0.089 170 170 170

0.075 200 200 200

0.066 240 250 230

0.053 300 270 270

0.044 350 325 325

0.037 440 400 400

DRILL CORE SPECIFICATIONS

Hole Size CoreDiameter (mm)

CoreVolume (L/m)

Core Wt(kg/m@D=2.7)

AQ Core 27 0.6 1.6

BQ Core 35.5 1.0 2.7

NQ Core 47.5 1.8 4.9

HQ Core 63.5 3.2 8.6

PQ Core 85 5.7 15.4

3 inch Core 76 4.5 12.1

4 inch Core 102 8.2 22.1

5 inch Core 127 12.7 34.3

6 inch Core 152 18.1 48.9