MS1438 Electra Gold - HomeGold Resources Ltdhomegoldresourcesltd.com/projects/GoldenRidge/MS1438 - Electra Gold...MS1438 – Electra Gold Prepared for ... Determine cyanide leach recovery

101B – 9850 – 201 Street · Langley, BC · CANADA · V1M 4A3

Tel: 604-888-7604 · Fax: 604-888-5521 · www.met-solvelabs.com

MS1438 – Electra Gold

Prepared for: Johan T. Shearer. M.Sc, P.Geo President Electra Gold Ltd. Unit 5, 2330 Tyner St. Port Coquitlam, B.C. Canada, V3C 2Z1 Phone: (604) 696-1022 ext 4 [email protected]

Prepared by: Met-Solve Laboratories Inc. 101B – 9850 – 201 Street Langley, BC V1M 4A3 Canada

Project Number:

MS1438

Wilhelm Tse, B.A.Sc. Process Metallurgist [email protected] Alex Lum, P.Eng Senior Metallurgist [email protected]

Ish Grewal, M.A.Sc. P.Eng President [email protected] February 13th, 2013

Note: This report refers to the samples as received. The information contained in this report is provided

'as is' without warranty of any kind with respect to the interpretation and use of the data by the client

mailto:[email protected]



Project MS1438 – Electra Gold

1

1.0 BACKGROUND

On December 6th, 2012, Met-Solve received 13 bags of drill core sample weighing approximately

16.9 kg from:

Electra Gold Ltd. Unit 5, 2330 Tyner St. Port Coquitlam, B.C. Canada, V3C 2Z1

The drill cores were crushed and mixed to form a composite for testing. This initial composite was

labeled BS100.

The primary objectives of the test work were to:

a) Determine the overall gold recovery via flotation at three different grind sizes

b) Determine cyanide leach recovery of gold and silver from a 48 hour bottle roll test

On January 8th, 2013, Met-Solve received an additional 5 kg of drill core samples for additional

gravity and flotation test work.

The primary objectives of the additional test work were to:

a) Identify the amount of gravity recoverable gold content present

b) Determine the overall gold and silver recovery from a gravity + flotation process

The remaining 3.5 kg from the initial composite was combined with the new 5 kg sample to create a

new composite for the additional gravity and flotation test work. This secondary composite was

labeled BS200.


2

1.1 TEST PROCEDURES

The samples were subject to the following preparation and test procedures:

1. Crushing and rotary splitting

2. 4.0 kg flotation test at three different grind sizes (P80 = 220 µm, 141 µm, 77 µm)

3. A 48-hour bottle roll cyanidation test (P80 = 77 µm)

4. Specific gravity test via pycnometer method using kerosene

5. A 2-Stage, 4 kg, GRG test using a laboratory scale Falcon L40 centrifugal concentrator,

with intermediate grinding between stages.

6. Flotation test on the gravity tails

2.0 RESULTS AND DISCUSSION

The individual test summaries and detailed mass balances are organized in the Appendices as per

Table I.

Table I: Appendix List

Appendix

Content

Test #

A

Head Composite Summary BS100 & BS200

B

Flotation at P80 = 220 µm

BS102

C


BS103

D


BS104

E

Cyanidation (48 Hour Bottle Roll Test)

BS106

F

Cyanidation (24 Hour Bottle Roll Test)

BS203

G 2-Stage GRG Test BS201

H Rougher-Cleaner Flotation on Gravity Tails BS202

I Combined Gravity & Flotation Mass Balance BS201 & BS202

J Specific Gravity Test BS105

K Assay Summary

The initial composite, BS100 (received Dec. 6th, 2012), had an assayed head grade of 1.42 g/t gold

and 46.5 g/t silver. The second composite, BS200 (received Jan. 8th, 2013), had an assayed head

grade of 0.86 g/t gold and 35.0 g/t silver.


3

2.1 FLOTATION (Test BS102 – BS104)

Three 4 kg samples were split from the initial composite (BS100) for flotation tests (BS102-BS104)

to determine gold, silver and sulfur recoveries at different grind sizes (220 µm, 141 µm and 77 µm).

The reagents used for flotation included CuSO4, PAX, MIBC and TF250. The overall recoveries and

gold grades of the flotation tests are presented in Table II.

Table II. Flotation Recoveries

Flotation Test

P80

Au Grades (g/t)

Gold Rec.

Mass Yield

(µm)

Calc. Head Tails

(%) (%)

BS102

220

1.60 0.54

68.7 6.6

BS103

141

1.44 0.51

67.0 7.0

BS104

77

1.45 0.37

76.2 6.9

The results show an increase in recovery and lower tail grades at finer grind sizes.

The deportment of other significant elements is also included in the detailed mass balances

(Appendices B - D). The calculated head grades, total concentrate grades and recoveries of these

other elements are presented in Table III.

Table III. Grades and Recoveries of other Base Metals during Flotation Test

Flotation Test

P80

Calc. Head Grade

(µm)

Ag (g/t) S (%) Pb (ppm) Zn (ppm)

BS102

220

69.7 1.9 1,688 3,954

BS103

141

64.0 1.8 1,693 3,855

BS104

77

60.7 1.9 1,891 4,185

Flotation Test

P80

Overall Concentrate Grade

(µm)

Ag (g/t) S (%) Pb (ppm) Zn (ppm)

BS102

220

805 26 16,028 54,179

BS103

141

752 26 15,957 51,273

BS104

77

723 27 18,867 56,694

Flotation Test

P80

Recovery (%)

(µm)

Ag S Pb Zn

BS102

220

76.0 92.4 62.5 90.2

BS103

141

81.8 96.5 65.6 92.6

BS104

77

82.1 97.8 68.7 93.3


4

2.2 CYANIDATION (BS106, BS203)

Approximately 200 g of the initial composite (BS100) was ground to a P80 of 77 µm for a cyanide

bottle roll test (BS106). The composite was leached in 1.0 g/L NaCN for 48 hours with sub-samples

taken at 1, 6 and 24 hours. It is important to note that the highest gold grade in solution occurred

after 24 hours of leaching. The drop in solution gold grade after 24 hours may be due to preg

robbing.

For cyanide leach test BS203, approximately 270 g of the second composite (BS200) was ground to

a P80 of 61 µm for a cyanide bottle roll test. The composite was leached in 1.0 g/L NaCN for 24

hours as the highest gold recovery occurred at this point. This test was done for quality control.

In both tests, lime was added as 10% slurry to maintain a pH of 10.5.

The overall recoveries and gold grades of the cyanidation tests are presented in Table IV.

Table IV. Cyanidation Recoveries

Cyanidation Test

Bottle Roll P80

Au Grades (g/t)

Gold Rec.

(hours) (µm)

Calc. Head Tails

(%)

BS106

48 77

1.82 0.10

94.6

BS203

24 61

1.32 0.08

94.0

Cyanidation achieved excellent gold recoveries of 94.6% and 94.0% respectively. Most of the gold

was recovered within 24 hours.

Note that both tests resulted in very low gold grades (≤ 0.1 g/t) in the leach residue.


5

2.3 FALCON GRAVITY TEST (BS201)

A 4 kg representative sample from the second composite (BS200) was finely crushed to a P80 of

731 µm. The material underwent 2 passes with grinding applied after the first pass. After each pass,

the concentrates were panned to examine the upgradeability of the material. The gravity tails were

subjected to a flotation test. The flow sheet of the gravity test work is presented in Figure 1.

Figure 1: Flow Sheet Diagram for Gravity Test Work

The gravity results are presented in Table V below.

Table V: Falcon Gravity Test Summary

Products Weight Assay (g/t) Distribution (%)

(g) (%) Au Ag Au Ag

Pan Concentrate 1 10.8 0.27 52.20 149.0 15.6 1.5

Pan Middling 1 28.5 0.71 9.19 76.0 7.2 2.1

L40 Concentrate 1 39.3 0.98 21.01 96.1 22.9 3.6

Pan Concentrate 2 5.5 0.14 62.70 1,856.0 9.5 9.8

Pan Middling 2 42.3 1.05 9.40 127.0 11.0 5.2

L40 Concentrate 2 47.8 1.19 15.53 325.9 20.5 15.0

Total L40 Concentrate 87.1 2.17 18.00 222.2 43.4 18.6

L40 Tails

3,932.5 97.83 0.52 21.5 56.6 81.4

Calculated Head 4,019.6 100.00 0.90 25.8 100.0 100.0

Assayed Head 0.86 35.0

The Electra Gold material had a moderate gravity recoverable gold content of 43.4%.

+850 µm

(P80 = 61 µm)

Feed

L40 Tails for Flotation Test

(BS202)

Pan Con 1

Pan Middling 1

Pan Con 2

Pan Middling 2

Grind


6

2.4 ROUGHER-CLEANER FLOTATION ON GRAVITY TAILS (BS202)

A rougher-cleaner flotation test was done on the gravity tails using PAX, MIBC and TF250 to

determine the overall recovery from a combined gravity and flotation process.

A cleaner float was performed on the rougher concentrates with minimal reagent addition. The

results of the flotation test are presented in Table VI.

Table VI: Flotation Recovery on Gravity Tails

Flotation on the gravity tails recovered 69.8% of the remaining gold into a mass yield of 9.34%.

Copper sulfate was not added for this flotation test as it did not appear to improve the results in the

first three floats.

Assay Distribution (%)

(g) (%) Au (g/t) Ag (g/t) S (%) Au Ag S

Cleaner Con 1 179.5 4.74 7.11 329.0 42.9 54.8 66.3 82.9

Cleaner Con 2 25.4 0.67 7.59 328.0 33.7 8.3 9.4 9.2

Cleaner Con 3 9.3 0.25 4.74 151.0 16.1 1.9 1.6 1.6

Total Cleaner Con.& Scav 214.2 5.65 7.06 321.2 40.6 65.0 77.2 93.8

Cleaner Tails 139.7 3.69 0.79 34.5 1.7 4.7 5.4 2.5

Total Rougher+Scav Con 353.9 9.34 4.59 208.0 25.3 69.8 82.6 96.3

Final Tails 3,433.9 90.66 0.21 4.5 0.1 30.2 17.4 3.7

Calculated Head 3,787.8 100.0 0.61 23.5 2.5 100.0 100.0 100.0

BS201 Gravity Tails 0.52 21.5 2.3

Products Weight


7

2.5 GRAVITY & ROUGHER-CLEANER FLOTATION

The flow sheet of the gravity + flotation test work is presented in Figure 2.

Figure 2: Flow Sheet Diagram for Gravity + Flotation Test Work

The overall gravity and flotation gold grades and recoveries are presented in Table VII.

Table VII: Gravity + Rougher-Cleaner Flotation Results

The combined gravity and flotation test achieved 81.7% gold recovery with a final tail grade of

0.21 g/t.

Note that composite BS200 had a lower gold grade than composite BS100. Despite the lower head

grade, a higher recovery was achieved when Gravity + Flotation was implemented.

The final tails grade from the Gravity + Float test was significantly lower (0.21 g/t Au compared to an

average tail grade of 0.47 g/t Au from flotation only) indicating that gravity was required to maximize

recovery.

Feed

+850 µm

Float Tails

Pan Con 1

Pan Tail 1

Pan Con 2

Pan Tail 2

Ground to 61 µm

Float

Float Con

(g) (%) Au Ag Au Ag

Pan Concentrate 1 10.8 0.27 52.20 149.0 14.1 1.4

Pan Middling 1 28.5 0.71 9.19 76.0 6.6 1.9

L40 Concentrate 1 39.3 0.98 21.01 96.1 20.7 3.4

Pan Concentrate 2 5.5 0.14 62.70 1,856.0 8.7 9.1

Pan Middling 2 42.3 1.05 9.40 127.0 10.0 4.8

L40 Concentrate 2 47.8 1.19 15.53 325.9 18.6 13.9


Float Con 367.4 9.14 4.59 208.0 42.3 68.3

Total Concentrate 454.5 11.31 7.16 210.7 81.7 85.7

Float Tails 3,565.1 88.69 0.21 4.5 18.3 14.3

Calculated Head 4,019.6 100.00 0.99 27.8 100.0 100.0




8

2.6 SPECIFIC GRAVITY

The specific gravity of the Electra Gold BS100 composite was found to be 2.69.

3.0 SUMMARY

The Electra Gold sample had a flotation recovery of 68.7%, 67.0% and 76.2% at a P80 of 220, 141

and 77 microns respectively.

Excellent gold recoveries of 94.0% and 94.6% were achieved in cyanide leach tests for 24 hours

and 48 hours respectively. Most of the gold was recovered within 24 hours.

The Electra Gold sample had a gravity recoverable gold content of 43.4%.

Combining both gravity and flotation yielded an overall gold recovery of 81.7% with a final tail grade

of 0.21 g/t.

The results of the metallurgical test work done on the Electra Gold sample are presented in

Table VIII below.

Table VIII. Electra Gold Test Work Summary

Test Type Test Number

P80 (µm)

Feed (g/t Au)

Au Recovery

(%)

Final Tail Grade

(g/t)

Flotation BS102

220

1.42

68.7 0.54

Flotation BS103

141

1.42

67.0 0.51

Flotation BS104

77

1.42

76.2 0.37

Cyanidation (48 hrs) BS106

77

1.42

94.6 0.10

Cyanidation (24 hrs) BS203

61

0.86

94.0 0.08

Gravity (2-Pass) BS201

61 (after grind)

0.86

43.4 0.52

Gravity + Float BS201 & BS202

61 (after grind)

0.86

81.7 0.21


9

APPENDICES

a) Head Assays (BS100 & BS200)

b) BS100 Head Composite (PSA) - Rec. on Dec. 6th , 2012

c) BS200 Head Composite (PSA) - Rec. on Jan. 8th , 2013

Appendix A

Head Composite Summary

Electra Gold

101B - 9850 - 201 Street, Langley, British Columbia

tel: 604-888-7604 · fax: 604-888-7611 · www.met-solvelabs.com

F.A Grav LECO ICP ICP ICP ICP ICP ICP ICP ICP ICP

Sample Sample Au Ag S Ag Al As B Ba Be Bi Ca Cd

Name Description ppm ppm % ppm % ppm ppm ppm ppm ppm % ppm

93245 Init Head Comp (BS100) 1.42 - 1.8 46.5 0.20 13 <5 48 <0.5 3 0.12 16

93319 2nd

Head Comp (BS200) 0.86 35 - 26.3 1.48 59 5 123 <0.5 <1 0.39 35

ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP

Sample Sample Ce Co Cr Cu Fe Ga Hg In K La Li Mg

Name Description ppm ppm ppm ppm % ppm ppm ppm % ppm ppm %

93245 Init Head Comp (BS100) 4 <0.5 6.9 189 0.5 <5 <1 <1 0.05 2 <1 0.06

93319 2nd

Head Comp (BS200) 2 7.9 20.8 618 3.4 <5 3 <1 0.53 1 4 1.1


Sample Sample Mn Mo Na Ni P Pb Rb S Sb Sc Se Sn

Name Description ppm ppm % ppm ppm ppm ppm % ppm ppm ppm ppm

93245 Init Head Comp (BS100) 65 16 <0.01 0.7 135 1,680 <10 0.03 <1 <0.5 <10 <5

93319 2nd

Head Comp (BS200) 435 10 0.07 7 393 1,030 31 2.67 16 4.2 <10 <5


Sample Sample Sr Ta Te Th Ti Tl U V W Y Zn Zr

Name Description ppm ppm ppm ppm % ppm ppm ppm ppm ppm ppm ppm

93245 Init Head Comp (BS100) 2.7 <10 <10 <5 <0.01 <5 <5 6.0 <1 2 3,760 <5

93319 2nd

Head Comp (BS200) 21.6 <10 <10 <5 0.06 <5 <5 51.4 13 4 5,850 <5

MS1438: Electra Gold Head Assay Summary

Client: Electra Gold Date: 07-Dec-12

Test: BS101 Initial PSA (Coarse Crushed) Project: MS1438

Sample: BS100 Initial Composite

Note: BS100 Initial Composite that was received on Dec. 6th, 2012 and coarse crushed to P80 = 1,892 µm

Rosin-Rammler Model

Weight Cummulative (%) Size Passing

US Mesh Microns (g) (%) Retained Passing (um) P (%)

1,892 80

8 2,360 25.1 7.48 7.48 92.52 359 50

10 2,000 23.2 6.91 14.39 85.61

16 1,180 63.2 18.83 33.21 66.79

20 850 22.5 6.70 39.92 60.08 Linear Interpolation

30 600 19.2 5.72 45.64 54.36 Size Passing

40 425 14.9 4.44 50.07 49.93 (um) P (%)

50 300 12.3 3.66 53.74 46.26 1,756 80

70 212 9.8 2.92 56.66 43.34 428 50

100 150 13.2 3.93 60.59 39.41

140 106 18.4 5.48 66.07 33.93

200 75 17.2 5.12 71.19 28.81

270 53 9.8 2.92 74.11 25.89

400 37 31.3 9.32 83.44 16.56

Undersize -37 55.6 16.56 100.00

TOTAL: 335.7 100.0

PARTICLE SIZE ANALYSIS

Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (um)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)

Client: Electra Gold Date: 09-Jan-13

Test: BS200 - 2nd Composite Project: MS1438

Sample: New material (Rec. Jan. 08, 2013) combined with remaining BS101 Head

and fine crushed

Note: Remaining BS100 Composite combined with new material received on Jan. 8, 2013 was combined

and fine crushed to P80 = 731 µm

Rosin-Rammler Model


US Mesh Microns (g) (%) Retained Passing (µm) P (%)

731 80

8 2,360 0.0 0.00 0.00 100.00 146 50

10 2,000 0.0 0.00 0.00 100.00

16 1,180 14.0 10.46 10.46 89.54


30 600 11.7 8.74 27.71 72.29 Size Passing

40 425 8.6 6.42 34.13 65.87 (µm) P (%)

50 300 7.2 5.38 39.51 60.49 821 80

70 212 5.4 4.03 43.54 56.46 134 50

100 150 6.0 4.48 48.02 51.98

140 106 7.2 5.38 53.40 46.60

200 75 7.5 5.60 59.00 41.00

270 53 7.5 5.60 64.60 35.40

400 37 9.4 7.02 71.62 28.38

-400 -37 38.0 28.38 100.00

TOTAL: 133.9 100.0


Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (µm)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)

1 Float (Au, Ag, S)

2 Float Kinetics (Au, Ag, S)

3 Float (Pb, Zn, As)

4 Float (Cu, Sb)

5 PSA of ground feed (BS102a)

Appendix B




(BS102)


Test: BS102 (P80 = 220 µm) Project: MS1438


Pulp Density 37.5% Float Cell 9 litres Speed 1,200 RPM

Assays Distribution (%)


Con1 84.8 1.92 16.1 579 46.9 19.4 16.0 48.6

Con2 61.3 1.39 25.4 1,092 39.9 22.1 21.8 29.9

Con3 18.2 0.41 25.6 2,687 22.5 6.6 15.9 5.0

Con4 19.2 0.44 36.5 953 14.0 9.9 5.9 3.3

Con5 43.9 0.99 6.5 408 5.5 4.1 5.8 2.9

Con6 33.0 0.75 7.6 464 3.6 3.5 5.0 1.5

Con7 15.4 0.35 7.6 588 3.1 1.7 2.9 0.6

Con8 14.8 0.34 6.7 566 3.5 1.4 2.7 0.6

Total Con & Scav 290.6 6.59 16.7 805 26.0 68.7 76.0 92.4

Tails 4,122.4 93.41 0.5 18 0.2 31.3 24.0 7.6

Calculated Head 4,413.0 100.00 1.6 70 1.9 100.0 100.0 100.0

Assayed Head 1.4 47 1.8

Time

Stage (min) PAX CuSO4 3418A MIBC TF250 Cond. Float pH

Con1 3 18 0 2.0 1.0

Con2 6 0 0.0 3.0 6.3

Con3 11 18 2 3.0 2.0 6.4

Con4 16 18 2 2.0 3.0

Con5 30 18 91 2 12.0 2.0 6.2

Con6 34 36 1 2.0 2.0 6.4

Con7 38 36 1 2.0 2.0 6.6

Con8 42 36 1 2.0 2.0 6.7

Total 42 181 91 0 6 3 25.0 17.0

FLOTATION TEST REPORT

Products Weight

Reagents added, grams per tonne Time (minutes)

0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Au Ag S


Test: BS102 Project: MS1438


FLOTATION: KINETICS PLOTS

0

10

20

30

40

50

60

70

80

90

100

0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0

Re

cove

ry (

%)

Float Time (minutes)

Au

Ag

S






(g) (%) Pb (ppm) Zn (ppm) As (ppm) Pb Zn As

Con1 84.8 1.92 21,000 102,200 *957 23.9 49.7 17.4

Con2 61.3 1.39 22,900 84,100 *1,400 18.8 29.5 18.4

Con3 18.2 0.41 19,600 42,400 *1,670 4.8 4.4 6.5

Con4 19.2 0.44 17,900 23,100 *1,240 4.6 2.5 5.1

Con5 43.9 0.99 6,350 8,210 *560 3.7 2.1 5.3

Con6 33.0 0.75 7,290 5,890 *462 3.2 1.1 3.3

Con7 15.4 0.35 7,660 5,670 *396 1.6 0.5 1.3

Con8 14.8 0.34 9,150 4,400 *442 1.8 0.4 1.4

Total Con & Scav 290.6 6.59 16,028 54,179 942 62.5 90.2 58.8

Tails 4,122.4 93.41 678 413 47 37.5 9.8 41.2

Calculated Head 4,413.0 100.00 1,688 3,954 105 100.0 100.0 100.0

Assayed Head 1,680 3,760 13

* Assays were inconsistent and need to be re-verified

Time


Con1 3 18 0 2.0 1.0

Con2 6 0 0.0 3.0 6.3

Con3 11 18 2 3.0 2.0 6.4

Con4 16 18 2 2.0 3.0

Con5 30 18 91 2 12.0 2.0 6.2

Con6 34 36 1 2.0 2.0 6.4

Con7 38 36 1 2.0 2.0 6.6

Con8 42 36 1 2.0 2.0 6.7

Total 42 181 91 0 6 3 25.0 17.0


Products Weight


0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Pb Zn As






(g) (%) Cu (ppm) Sb (ppm) Cu Sb

Con1 84.8 1.92 *5,370 *299 25.6 16.4

Con2 61.3 1.39 *6,980 *457 24.1 18.1

Con3 18.2 0.41 *6,460 *486 6.6 5.7

Con4 19.2 0.44 *5,240 *412 5.7 5.1

Con5 43.9 0.99 *1,810 *131 4.5 3.7

Con6 33.0 0.75 *1,810 *166 3.4 3.5

Con7 15.4 0.35 *2,170 *183 1.9 1.8

Con8 14.8 0.34 *1,850 *176 1.5 1.7

Total Con & Scav 290.6 6.59 4,478 299 73.2 56.1

Tails 4,122.4 93.41 116 17 26.8 43.9

Calculated Head 4,413.0 100.00 403 35 100.0 100.0

Assayed Head 189 <1


Time


Con1 3 18 0 2.0 1.0

Con2 6 0 0.0 3.0 6.3

Con3 11 18 2 3.0 2.0 6.4

Con4 16 18 2 2.0 3.0

Con5 30 18 91 2 12.0 2.0 6.2

Con6 34 36 1 2.0 2.0 6.4

Con7 38 36 1 2.0 2.0 6.6

Con8 42 36 1 2.0 2.0 6.7

Total 42 181 91 0 6 3 25.0 17.0


Products Weight


0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Cu Sb


Test: BS102a Ground Project: MS1438


Note: BS100 Composite ground to P80 = 220 µm for flotation test BS102

Grind Time: 1.5 minutes

Rosin-Rammler Model



220 80

8 2,360 0.0 0.00 0.00 100.00 87 50

10 2,000 0.0 0.00 0.00 100.00

16 1,180 0.0 0.00 0.00 100.00


30 600 1.7 1.25 1.25 98.75 Size Passing

40 425 5.8 4.27 5.53 94.47 (um) P (%)

50 300 10.6 7.81 13.34 86.66 226 80

70 212 10.7 7.89 21.22 78.78 87 50

100 150 12.6 9.29 30.51 69.49

140 106 19.7 14.52 45.03 54.97

200 75 11.3 8.33 53.35 46.65

270 53 12.7 9.36 62.71 37.29

400 37 17.5 12.90 75.61 24.39

Undersize -37 33.1 24.39 100.00

TOTAL: 135.7 100.0


Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (um)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)

1 Float (Au, Ag, S)



4 Float (Cu, Sb)


Appendix C

(BS103)










Con1 135.2 3.36 15.8 772 45.2 37.0 40.5 82.6

Con2 30.9 0.77 23.0 1,416 19.4 12.3 17.0 8.1

Con3 24.0 0.60 18.9 1,198 8.8 7.8 11.2 2.8

Con4 9.9 0.25 15.0 * 709 5.9 2.6 2.7 0.8

Con5 44.7 1.11 4.4 219 2.3 3.4 3.8 1.4

Con6 12.9 0.32 6.7 * 396 2.2 1.5 2.0 0.4

Con7 11.5 0.29 7.1 573 1.8 1.4 2.6 0.3

Con8 11.0 0.27 5.2 474 1.4 1.0 2.0 0.2

Total Con & Scav 280.1 6.96 13.8 752 25.5 67.0 81.8 96.5

Tails 3,744.0 93.04 0.5 13 0.07 33.0 18.2 3.5

Calculated Head 4,024.1 100.00 1.4 64 1.8 100.0 100.0 100.0


* Normalized values were used as there were insufficient sample for assay

Time


Con1 4 20 0 2.0 2.0

Con2 7 0 0.0 3.0 6.6

Con3 12 20 2 2.0 3.0 6.8

Con4 16 20 2 2.0 2.0 6.9

Con5 30 20 99 3 12.0 2.0 6.5

Con6 34 40 1 2.0 2.0 6.7

Con7 38 40 1 2.0 2.0 6.9

Con8 42 40 1 2.0 2.0 7.0

Total 42 199 99 0 6 3 24.0 18.0


Products Weight


0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Au Ag S





0

10

20

30

40

50

60

70

80

90

100

0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0

Re

cove

ry (

%)


Au

Ag

S







Con1 135.2 3.36 21,100 90,200 *1,240 41.9 78.6 40.6

Con2 30.9 0.77 18,000 41,600 *1,370 8.2 8.3 10.3

Con3 24.0 0.60 19,200 20,300 *863 6.8 3.1 5.0

Con4 9.9 0.25 17,700 12,200 *660 2.6 0.8 1.6

Con5 44.7 1.11 4,040 3,230 *296 2.7 0.9 3.2

Con6 12.9 0.32 6,300 4,030 *370 1.2 0.3 1.2

Con7 11.5 0.29 7,110 4,070 *401 1.2 0.3 1.1

Con8 11.0 0.27 7,370 2,720 *98 1.2 0.2 0.3

Total Con & Scav 280.1 6.96 15,957 51,273 932 65.6 92.6 63.2

Tails 3,744.0 93.04 626 307 41 34.4 7.4 36.8

Calculated Head 4,024.1 100.00 1,693 3,855 103 100.0 100.0 100.0



Time


Con1 4 20 0 2.0 2.0

Con2 7 0 0.0 3.0 6.6

Con3 12 20 2 2.0 3.0 6.8

Con4 16 20 2 2.0 2.0 6.9

Con5 30 20 99 3 12.0 2.0 6.5

Con6 34 40 1 2.0 2.0 6.7

Con7 38 40 1 2.0 2.0 6.9

Con8 42 40 1 2.0 2.0 7.0

Total 42 199 99 0 6 3 24.0 18.0


Products Weight


0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Pb Zn As







Con1 135.2 3.36 *5,980 *384 50.4 33.0

Con2 30.9 0.77 *5,720 *487 11.0 9.6

Con3 24.0 0.60 *4,360 *316 6.5 4.8

Con4 9.9 0.25 *3,530 *260 2.2 1.6

Con5 44.7 1.11 *1,140 *86 3.2 2.4

Con6 12.9 0.32 *1,910 *174 1.5 1.4

Con7 11.5 0.29 *2,170 *181 1.6 1.3

Con8 11.0 0.27 *1,490 *69 1.0 0.5

Total Con & Scav 280.1 6.96 4,433 307 77.4 54.7

Tails 3,744.0 93.04 97 19 22.6 45.3

Calculated Head 4,024.1 100.00 399 39 100.0 100.0

Assayed Head 189 <1


Time


Con1 4 20 0 2.0 2.0

Con2 7 0 0.0 3.0 6.6

Con3 12 20 2 2.0 3.0 6.8

Con4 16 20 2 2.0 2.0 6.9

Con5 30 20 99 3 12.0 2.0 6.5

Con6 34 40 1 2.0 2.0 6.7

Con7 38 40 1 2.0 2.0 6.9

Con8 42 40 1 2.0 2.0 7.0

Total 42 199 99 0 6 3 24.0 18.0


Products Weight


0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Cu Sb





Grind Time: 2 minutes

Rosin-Rammler Model



141 80

8 2,360 0.0 0.00 0.00 100.00 66 50

10 2,000 0.0 0.00 0.00 100.00

16 1,180 0.0 0.00 0.00 100.00


30 600 0.0 0.00 0.00 100.00 Size Passing

40 425 0.0 0.00 0.00 100.00 (um) P (%)

50 300 2.2 1.64 1.64 98.36 143 80

70 212 7.1 5.30 6.95 93.05 64 50

100 150 14.1 10.53 17.48 82.52

140 106 21.2 15.83 33.31 66.69

200 75 18.2 13.59 46.90 53.10

270 53 8.6 6.42 53.32 46.68

400 37 24.8 18.52 71.84 28.16

Undersize -37 37.7 28.16 100.00

TOTAL: 133.9 100.0


Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (um)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)

1 Float (Au, Ag, S)



4 Float (Cu, Sb)


Appendix D

(BS104)










Con1 160.0 4.03 20.3 791 41.9 56.6 52.5 90.2

Con2 23.5 0.59 20.0 1,073 13.7 8.2 10.5 4.3

Con3 19.6 0.49 14.1 904 6.3 4.8 7.4 1.7

Con4 17.2 0.43 5.9 * 615 2.4 1.8 4.4 0.5

Con5 27.4 0.69 5.1 326 1.7 2.5 3.7 0.6

Con6 25.6 0.65 5.2 339 1.5 2.3 3.6 0.5

Total Con & Scav 273.3 6.89 16.0 723 26.6 76.2 82.1 97.8

Tails 3,695.6 93.11 0.4 12 0.04 23.8 17.9 2.2

Calculated Head 3,968.9 100.00 1.4 61 1.9 100.0 100.0 100.0


* Normalized values were used as there were insufficient sample for assay

Time


Con1 7 20 0 2.0 5.0 6.4

Con2 12 20 2 2.0 3.0 6.6

Con3 17 20 2 2.0 3.0 6.6

Con4 32 20 101 3 12.0 3.0 6.3

Con5 37 40 1 2.0 3.0

Con6 44 40 1 2.0 5.0 6.6

Total 44 161 101 0 6 2 22.0 22.0


Products Weight


0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Au Ag S





0

10

20

30

40

50

60

70

80

90

100

0.0 5.0 10.0 15.0 20.0 25.0

Re

cove

ry (

%)


Au

Ag

S







Con1 160.0 4.03 25,100 93,200 *32 53.5 89.8 3.9

Con2 23.5 0.59 17,400 15,200 *72 5.4 2.2 1.3

Con3 19.6 0.49 18,300 3,600 *36 4.8 0.4 0.5

Con4 17.2 0.43 4,590 2,190 *30 1.1 0.2 0.4

Con5 27.4 0.69 5,330 2,110 *40 1.9 0.3 0.8

Con6 25.6 0.65 5,770 2,310 *54 2.0 0.4 1.0

Total Con & Scav 273.3 6.89 18,867 56,694 38 68.7 93.3 7.9

Tails 3,695.6 93.11 636 302 33 31.3 6.7 92.1

Calculated Head 3,968.9 100.00 1,891 4,185 33 100.0 100.0 100.0



Time


Con1 7 20 0 2.0 5.0 6.4

Con2 12 20 2 2.0 3.0 6.6

Con3 17 20 2 2.0 3.0 6.6

Con4 32 20 101 3 12.0 3.0 6.3

Con5 37 40 1 2.0 3.0

Con6 44 40 1 2.0 5.0 6.6

Total 44 161 101 0 6 2 22.0 22.0


Products Weight


0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Pb Zn As







Con1 160.0 4.03 *2,290 *122 41.4 27.8

Con2 23.5 0.59 *2,340 *40 6.2 1.3

Con3 19.6 0.49 *1,870 *31 4.1 0.9

Con4 17.2 0.43 *942 *17 1.8 0.4

Con5 27.4 0.69 *1,110 *3 3.4 0.1

Con6 25.6 0.65 *1,430 *32 4.1 1.2

Total Con & Scav 273.3 6.89 1,980 81 61.2 31.7

Tails 3,695.6 93.11 93 13 38.8 68.3

Calculated Head 3,968.9 100.00 223 18 100.0 100.0

Assayed Head 189 <1


Time


Con1 7 20 0 2.0 5.0 6.4

Con2 12 20 2 2.0 3.0 6.6

Con3 17 20 2 2.0 3.0 6.6

Con4 32 20 101 3 12.0 3.0 6.3

Con5 37 40 1 2.0 3.0

Con6 44 40 1 2.0 5.0 6.6

Total 44 161 101 0 6 2 22.0 22.0


Products Weight


0

10

20

30

40

50

60

70

80

90

100

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

Meta

l R

eco

very

(%

)

Mass to Concentrate

Cu Sb






Rosin-Rammler Model



77 80

8 2,360 0.0 0.00 0.00 100.00 43 50

10 2,000 0.0 0.00 0.00 100.00

16 1,180 0.0 0.00 0.00 100.00


30 600 0.0 0.00 0.00 100.00 Size Passing

40 425 0.0 0.00 0.00 100.00 (um) P (%)

50 300 0.0 0.00 0.00 100.00 74 80

70 212 0.0 0.00 0.00 100.00 44 50

100 150 1.8 0.82 0.82 99.18

140 106 18.1 8.26 9.08 90.92

200 75 21.8 9.95 19.02 80.98

270 53 48.0 21.90 40.92 59.08

400 37 36.0 16.42 57.34 42.66

Undersize -37 93.5 42.66 100.00

TOTAL: 219.2 100.0


Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (um)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)

a) Mass-Balance

b) Feed (PSA)



Appendix E

Cyanidation

Electra Gold

(BS106)

48 Hour Bottle-Roll Cyanidation Test




Objective: BS100 Initial Composite ground to P80 = 77 µm for a 48 hour bottle roll CN leach test

Sol. Wt.

(g) Au Ag Au Ag

1 hour 661.4 0.32 7.2 53.1 34.3 #DIV/0!

6 hours 630.7 0.55 11.2 89.5 52.5 #DIV/0!

24 hours 605.2 0.65 13.6 104.8 63.0 #DIV/0!

48 hours 581.9 0.58 13.5 94.6 62.6 #DIV/0!

216.5 0.10 24.0 5.4 37.4 #DIV/0!

Calculated Head 219.0 1.82 63.4 0.00 100.0 100.0 #DIV/0!


Time pH DO

(hours) (g) added (kg/t) [g/L] (g) added (kg/t-solids) (mg/l)

0 11.17 3.20 1.46 0.00 0.66 3.01 8.6

1 11.22 0.00 1.46 0.88 0.08 3.38 9.4

6 11.03 0.00 1.46 0.98 0.00 3.38 7.9

24 10.26 0.50 1.69 0.98 0.00 3.38 8.7

48 10.21 0.50 1.92 0.78 0.00 3.38 9.4

Initial Solids: 219.0 g Final Solids: 216.5 g

Iniitial Solution: 657.5 g %wt loss : 1.14 %

Solids: 25 % CN Consumption : 0.96 kg/t solids

Initial NaCN: 1.0 g/L

Target pH: 10.5 PbNO3 Addition: 0.000 g total

Test Duration: 48 hours

Test Conditions

Residue

Lime (10%) NaCN

CYANIDATION TEST REPORT

Products / Time Assay (ppm) Distribution (%)

0

20

40

60

80

100

0 10 20 30 40 50 60

Rec

ove

ry (

%)

Time (hours)

Au

Ag


Test: BS106 Ground Project: MS1438


Note: BS100 Initial Composite ground to P80 = 77 µm for a 48 hour bottle roll CN leach test


Rosin-Rammler Model



77 80

8 2,360 0.0 0.00 0.00 100.00 43 50

10 2,000 0.0 0.00 0.00 100.00

16 1,180 0.0 0.00 0.00 100.00


30 600 0.0 0.00 0.00 100.00 Size Passing

40 425 0.0 0.00 0.00 100.00 (um) P (%)

50 300 0.0 0.00 0.00 100.00 74 80

70 212 0.0 0.00 0.00 100.00 44 50

100 150 1.8 0.82 0.82 99.18

140 106 18.1 8.26 9.08 90.92

200 75 21.8 9.95 19.02 80.98

270 53 48.0 21.90 40.92 59.08

400 37 36.0 16.42 57.34 42.66

Undersize -37 93.5 42.66 100.00

TOTAL: 219.2 100.0


Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (um)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)

a) Mass-Balance

b) Feed (PSA)


Appendix F

Cyanidation

Electra Gold

(BS203)

24 Hour Bottle-Roll Cyanidation Test




Sample: BS200 Composite

Objective: BS200 Composite ground to P80 = 61 µm for a 24 hour bottle roll CN leach test

Sol. Wt.

(g) Au Ag Au Ag

1 hour 828.4 0.20 45.4 0.0 #DIV/0!

6 hours 803.3 0.37 84.7 0.0 #DIV/0!

24 hours 781.7 0.42 94.0 0.0 #DIV/0!

271.8 0.08 10.2 6.0 100.0 #DIV/0!

Calculated Head 273.6 1.32 10.1 0.00 100.0 100.0 #DIV/0!

Assayed Head 0.86

Time pH DO

(hours) (g) added (kg/t) [g/L] (g) added (kg/t-solids) (mg/l)

0 11.89 2.40 0.88 0.00 0.83 3.03 7.6

1 12.26 0.00 0.88 0.98 0.00 3.03 9.3

6 11.97 0.00 0.88 0.78 0.18 3.69 8.4

24 11.28 0.00 0.88 0.88 0.00 3.69 10.7

Initial Solids: 273.6 g Final Solids: 271.8 g

Iniitial Solution: 825.2 g %wt loss : 0.66 %

Solids: 25 % CN Consumption : 1.03 kg/t solids

Initial NaCN: 1.0 g/L

Target pH: 10.5 PbNO3 Addition: 0.000 g total

Test Duration: 24 hours

Test Conditions

Residue

Lime (10%) NaCN

CYANIDATION TEST REPORT

Products / Time Assay (ppm) Distribution (%)

0

20

40

60

80

100

0 10 20 30

Au

Re

cove

ry (%

)

Time (hours)




Note: BS200 Composite ground to P80 = 61 µm for a 24 hour bottle roll CN leach test

Rosin-Rammler Model

Weight Cumulative (%) Size Passing


61 80

8 2,360 0.0 0.00 0.00 100.00 32 50

10 2,000 0.0 0.00 0.00 100.00

16 1,180 0.0 0.00 0.00 100.00


30 600 0.0 0.00 0.00 100.00 Size Passing

40 425 0.0 0.00 0.00 100.00 (um) P (%)

50 300 0.0 0.00 0.00 100.00 63 80

70 212 0.0 0.00 0.00 100.00 28 50

100 150 2.0 0.73 0.73 99.27

140 106 6.5 2.38 3.11 96.89

200 75 25.1 9.19 12.30 87.70

270 53 40.1 14.68 26.98 73.02

400 37 43.2 15.81 42.79 57.21

Undersize -37 156.3 57.21 100.00

TOTAL: 273.2 100.0


Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (um)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)

a) Mass-Balance

b) BS200 Head Composite (PSA)

c) Intermediate Grind (PSA)


2-Stage GRG with Intermediate Grind after 1st Pass

Appendix G

Gravity Recovery Results

Electra Gold

(BS201)





(g) (%) Au Ag Au Ag

Pan Concentrate 1 10.8 0.27 52.20 149.0 15.6 1.5

Pan Middling 1 28.5 0.71 9.19 76.0 7.2 2.1

L40 Concentrate 1 39.3 0.98 21.01 96.1 22.9 3.6

Pan Concentrate 2 5.5 0.14 62.70 1,856.0 9.5 9.8

Pan Middling 2 42.3 1.05 9.40 127.0 11.0 5.2

L40 Concentrate 2 47.8 1.19 15.53 325.9 20.5 15.0


L40 Tails 3,932.5 97.83 0.52 21.5 56.6 81.4

Calculated Head 4,019.6 100.00 0.90 25.8 100.0 100.0


+850 µm

(P80 = 61 µm)

Feed

GRAVITY CONCENTRATION TEST REPORT


0

5

10

15

20

25

30

35

40

45

50

0.0 0.5 1.0 1.5 2.0 2.5

Me

tal R

ec

ove

ry (

%)

Mass To Concentrate (%)

Au

Ag

L40 Tails for Flotation Test

(BS202)

Pan Con 1

Pan Middling 1

Pan Con 2

Pan Middling 2

Grind


Test: BS200 - 2nd Composite Project: MS1438

Sample: New material (Rec. Jan. 08, 2013) combined with remaining BS101 Head

and fine crushed

Note: BS200 Composite fine crushed to P80 = 731 µm for a gravity concentration test

Rosin-Rammler Model



731 80

8 2,360 0.0 0.00 0.00 100.00 146 50

10 2,000 0.0 0.00 0.00 100.00

16 1,180 14.0 10.46 10.46 89.54


30 600 11.7 8.74 27.71 72.29 Size Passing

40 425 8.6 6.42 34.13 65.87 (µm) P (%)

50 300 7.2 5.38 39.51 60.49 821 80

70 212 5.4 4.03 43.54 56.46 134 50

100 150 6.0 4.48 48.02 51.98

140 106 7.2 5.38 53.40 46.60

200 75 7.5 5.60 59.00 41.00

270 53 7.5 5.60 64.60 35.40

400 37 9.4 7.02 71.62 28.38

-400 -37 38.0 28.38 100.00

TOTAL: 133.9 100.0


Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (µm)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)




(Ground for 2nd Stage GRG Pass)

Note: BS200 Composite fine crushed to P80 = 61 µm after 1st gravity concentration stage

Rosin-Rammler Model



61 80

8 2,360 0.0 0.00 0.00 100.00 32 50

10 2,000 0.0 0.00 0.00 100.00

16 1,180 0.0 0.00 0.00 100.00


30 600 0.0 0.00 0.00 100.00 Size Passing

40 425 0.0 0.00 0.00 100.00 (µm) P (%)

50 300 0.0 0.00 0.00 100.00 53 80

70 212 0.0 0.00 0.00 100.00 32 50

100 150 0.3 0.47 0.47 99.53

140 106 2.6 4.04 4.51 95.49

200 75 7.0 10.89 15.40 84.60

270 53 2.9 4.51 19.91 80.09

400 37 17.0 26.44 46.35 53.65

-400 -37 34.5 53.65 100.00

TOTAL: 64.3 100.0


Sieve Size

0

10

20

30

40

50

60

70

80

90

100

0 500 1,000

Cu

m. P

assin

g (

%)

Particle Size (µm)

0

1

10

100

1 10 100 1,000 10,000Cu

m. P

ass. (%

)

Particle Size (mm)

a) Au, Ag & S mass balance

b) Float Reagent Scheme



Appendix H

Rougher-Cleaner Float Results

Electra Gold

Float Recovery on Gravity Tails, at natural pH and 61 µm grind

(BS202)



Sample: BS201 Gravity Tails

P80 = 61 microns

Cleaner Pulp Density 11.0% Cleaner Cell 3 litres

Rougher Pulp Density 30.6% Rougher Cell 10 litres Speed 1,200 RPM

Assay Distribution (%)


Cleaner Con 1 179.5 4.74 7.11 329.0 42.9 54.8 66.3 82.9

Cleaner Con 2 25.4 0.67 7.59 328.0 33.7 8.3 9.4 9.2

Cleaner Con 3 9.3 0.25 4.74 151.0 16.1 1.9 1.6 1.6

Total Cleaner Con.& Scav 214.2 5.65 7.06 321.2 40.6 65.0 77.2 93.8

Cleaner Tails 139.7 3.69 0.79 34.5 1.7 4.7 5.4 2.5

Total Rougher+Scav Con 353.9 9.34 4.59 208.0 25.3 69.8 82.6 96.3

Final Tails 3,433.9 90.66 0.21 4.5 0.1 30.2 17.4 3.7

Calculated Head 3,787.8 100.0 0.61 23.5 2.5 100.0 100.0 100.0

BS201 Gravity Tails 0.52 21.5 2.3


Products Weight



Sample: BS201 Gravity Tails

P80 = 61 microns

Cleaner Reagent Scheme Float Wt: 353.9 g Pulp Density: 11.0%

Time

Stage (min) PAX CuSO4 PAX MIBC TF250 Cond. Float pH

Initial 0

Conditoner 0

Cleaner Con 1 2 0 0 0.0 2.0 8.0

Cleaner Con 2 5 0 0 0.0 3.0 7.8

Cleaner Con 3 10 14 12 2.0 3.0 7.8

Total 10 14 0 0 0 12 2 8.0

Rougher Reagent Scheme Float Wt: 3,787.8 g Pulp Density: 30.6%

Time

Stage (min) PAX CuSO4 PAX MIBC TF250 Cond. Float pH

Initial 0 7.7

Re-pulp 0

Conditoner 0

Rougher 1 4 21 0 2.0 2.0 7.8

Rougher 2 8 21 2 2.0 2.0 7.9

Rougher 3 13 21 2 2.0 3.0 8.0

Rougher 4 18 42 2 2.0 3.0 8.0

Rougher 5 23 42 1 2.0 3.0 8.1

Rougher 6 28 42 1 2.0 3.0 8.1

Rougher 7 28

Total 28 190 0 0 6 2 12.0 16.0

FLOTATION REAGENT SCHEME

Reagents added, grams per tonne Feed Time (minutes)

Reagents added, grams per tonne Rougher Con. Time (minutes)



Appendix I

Gravity & Rougher-Cleaner Float Results

Electra Gold

(BS201 & BS202 Combined)


Test: BS201 & BS202 (Gravity + Float) Project: MS1438


(g) (%) Au Ag Au Ag

Pan Concentrate 1 10.8 0.27 52.20 149.0 14.1 1.4

Pan Middling 1 28.5 0.71 9.19 76.0 6.6 1.9

L40 Concentrate 1 39.3 0.98 21.01 96.1 20.7 3.4

Pan Concentrate 2 5.5 0.14 62.70 1,856.0 8.7 9.1

Pan Middling 2 42.3 1.05 9.40 127.0 10.0 4.8

L40 Concentrate 2 47.8 1.19 15.53 325.9 18.6 13.9


Float Con 367.4 9.14 4.59 208.0 42.3 68.3

Total Concentrate 454.5 11.31 7.16 210.7 81.7 85.7

Float Tails 3,565.1 88.69 0.21 4.5 18.3 14.3

Calculated Head 4,019.6 100.00 0.99 27.8 100.0 100.0


Feed

+850 µm

GRAVITY-FLOAT TEST REPORT


Float Tails

Pan Con 1

Pan Tail 1

Pan Con 2

Pan Tail 2

Ground to 61 µm

Float

Float Con


Appendix J

Specific Gravity Test via Pycnometer Method Using Kerosene

Electra Gold

(BS105)




Sample: Electra Gold Ground to P80 = 140 µm

(Composite from Test BS103a)

Weight of Empty Flash 97.3 g

Kerosene Added 197.1 g

Total Volume 250 mL

S.G. of Kerosene 0.7884 g/cm3

Electra Gold Electra Gold

(Repeat for QC)

Particle Passing 80% (µm) 140 140

Weight of Empty Flash (g) 100.1 94.1

Mass of Solids (g) 67.4 65.5

Kerosene Added (g) 177.3 178

Volume of Kerosene (mL) 224.9 225.8

Total Volume (mL) 250 250

S.G. of Solid (g/cm3) 2.68 2.70

S.G. by Kerosene

S.G. of Kerosene

SPECIFIC GRAVITY TEST

a) BS102 - Float at P80 = 220 µm Assay Summary

b) BS103 - Float at P80 = 141 µm Assay Summary

c) BS104 - Float at P80 = 77 µm Assay Summary

d) BS106 - 48-Hour Cyanide Leach Assay Summary

e) BS201 - Falcon 2-Stage Gravity Assay Summary

f) BS202 - Flotation on Gravity Tails Assay Summary


Appendix K

Assay Summary

Electra Gold


MS1438: Electra Gold Sample Assay Summary (Test BS102)

F.A Grav LECO ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP

Sample Sample Au Ag S Ag Al As B Ba Be Bi Ca Cd Ce Co Cr Cu Fe Ga Hg In K La Li Mg

Name Description ppm ppm % ppm % ppm ppm ppm ppm ppm % ppm ppm ppm ppm ppm % ppm ppm ppm % ppm ppm %

93245 Head 1.42 - 1.8 46.5 0.20 13 <5 48 <0.5 3 0.12 16 4 <0.5 6.9 189 0.5 <5 <1 <1 0.05 2 <1 0.06

93217 Float Con 1 16.10 579 46.9 >100 0.05 957 <5 <1 <0.5 85 0.03 377 1 22.4 30.5 5,370 23.8 17 <1 <1 0.01 <1 <1 <0.01

93218 Float Con 2 25.40 1,092 39.9 >100 0.12 1,400 9 3 <0.5 86 0.06 325 3 25.2 108 6,980 22.6 21 <1 <1 0.03 <1 <1 0.03

93219 Float Con 3 25.60 2,687 22.5 >100 0.31 1,670 <5 6 <0.5 93 0.17 172 8 21.8 536 6,460 16.1 12 <1 <1 0.08 3 1 0.10

93220 Float Con 4 36.50 953 14.0 >100 0.43 1,240 <5 13 <0.5 51 0.24 109 12 20 996 5,240 11.5 11 7 4 0.10 5 2 0.15

93221 Float Con 5 6.50 408 5.5 >100 0.34 560 <5 43 <0.5 69 0.26 39 9 9 529 1,810 4.8 5 <1 <1 0.07 4 2 0.14

93222 Float Con 6 7.56 464 3.6 >100 0.43 462 <5 57 <0.5 32 0.26 28 12 11.5 1,100 1,810 4.6 5 <1 <1 0.10 5 2 0.16

93223 Float Con 7 7.61 588 3.1 >100 0.57 396 <5 88 <0.5 16 0.26 28 14 12.8 1,420 2,170 4.9 7 <1 4 0.14 7 2 0.19

93224 Float Con 8 6.65 566 3.5 >100 0.60 442 <5 80 <0.5 39 0.29 21 16 12 1,210 1,850 5.1 7 <1 4 0.15 7 2 0.20

Net Con Assay 16.65 805 26.0 >100 0.25 942 <5 23.9 <0.5 69 0.15 208 6 18.5 473 4,478 15.3 13 <1 ~2 0.06 3 1 0.08

93239 Float Tail Cut 1 0.48 - 0.28 17.5 0.14 43 - 16 - <2 0.09 1.4 - <1 25 116 0.6 - <3 - 0.03 <2 - 0.06

93240 Float Tail Cut 2 0.59 - - 18.3 0.21 50 <5 46 <0.5 18 0.12 1.8 4 <0.5 31.5 115 0.45 <5 <1 <1 0.05 2 <1 0.06

ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP

Sample Sample Mn Mo Na Ni P Pb Rb S Sb Sc Se Sn Sr Ta Te Th Ti Tl U V W Y Zn Zr

Name Description ppm ppm % ppm ppm ppm ppm % ppm ppm ppm ppm ppm ppm ppm ppm % ppm ppm ppm ppm ppm ppm ppm

93245 Head 65 16 <0.01 0.7 135 1,680 <10 0.03 <1 <0.5 <10 <5 2.7 <10 <10 <5 <0.01 <5 <5 6.0 <1 2 3,760 <5

93217 Float Con 1 297 20 <0.01 86 70 21,000 <10 >10 299 <0.5 <10 <5 <0.5 <10 <10 <5 <0.01 <5 8 12.4 36 <1 102,200 <593218 Float Con 2 280 83 <0.01 123 135 22,900 <10 >10 457 <0.5 <10 17 <0.5 <10 <10 <5 <0.01 <5 10 13.9 56 1 84,100 <593219 Float Con 3 284 321 <0.01 248 386 19,600 <10 >10 486 <0.5 <10 16 <0.5 <10 <10 <5 <0.01 <5 7 21.3 <1 4 42,400 <593220 Float Con 4 347 437 <0.01 413 428 17,900 <10 >10 412 <0.5 <10 <5 <0.5 <10 <10 <5 <0.01 <5 7 27.2 <1 6 23,100 <593221 Float Con 5 227 147 <0.01 192 214 6,350 <10 4.7 131 0.6 <10 <5 1.2 <10 <10 <5 <0.01 <5 5 17.7 <1 5 8,210 <593222 Float Con 6 309 185 <0.01 451 451 7,290 <10 3.2 166 1.0 <10 8 2.8 <10 <10 <5 0.01 <5 7 25.8 <1 7 5,890 <593223 Float Con 7 367 223 <0.01 591 511 7,660 <10 2.7 183 1.4 <10 9 3.8 <10 <10 <5 0.01 <5 8 32.8 <1 8 5,670 <593224 Float Con 8 352 201 <0.01 499 580 9,150 <10 2.9 176 1.4 <10 <5 4.4 <10 <10 <5 0.01 <5 8 32.2 <1 9 4,400 <5

Net Con Assay 293 138 <0.01 231 242 16,028 <10 7.7 299 0.7 <10 9 1.2 <10 <10 <5 0.01 <5 8 18.7 23 4 54,179 <593239 Float Tail Cut 1 41 10 <0.01 12 95 645 - - 27 <1 - - 2 - - - <0.01 <10 - <1 <10 - 411 <593240 Float Tail Cut 2 54 14 <0.01 13 63 710 <10 0.02 6 0.6 <10 <5 2.8 <10 <10 <5 <0.01 <5 <5 6.5 <1 2 415 <5





93245 Head 1.42 - 1.8 46.5 0.20 13 <5 48 <0.5 3 0.12 16 4 <0.5 7 189 0.5 <5 <1 <1 0.05 2 <1 0.06

93225 Float Con 1 15.80 772 45.2 >100 0.08 1,240 <5 4 <0.5 46 0.06 329 2 24.6 115 5,980 24.7 19 21 <1 0.02 <1 <1 0.02

93226 Float Con 2 23.00 1,416 19.4 >100 0.29 1,370 <5 7 <0.5 <1 0.2 173 7 22.4 838 5,720 13.5 11 <1 <1 0.07 2 1 0.10

93227 Float Con 3 18.90 1,198 8.8 >100 0.42 863 <5 21 <0.5 65 0.27 84 12 22.9 2,010 4,360 7.8 9 <1 7 0.10 6 2 0.15

93228 Float Con 4 15.00 NSS 5.9 >100 0.48 660 <5 36 <0.5 30 0.29 52 15 24.6 2,770 3,530 6.6 9 <1 2 0.12 7 2 0.17

93229 Float Con 5 4.39 219 2.3 >100 0.41 296 <5 83 <0.5 <1 0.28 15 10 11.3 1,090 1,140 3.2 <5 <1 2 0.09 4 2 0.16

93230 Float Con 6 6.71 NSS 2.2 >100 0.61 370 <5 121 <0.5 21 0.28 19 16 19.8 2,550 1,910 4.7 7 <1 2 0.15 7 2 0.21

93231 Float Con 7 7.07 573 1.8 >100 0.75 401 <5 146 <0.5 11 0.27 20 20 21.8 2,970 2,170 5.2 9 <1 3 0.18 9 3 0.26

93232 Float Con 8 5.15 474 1.4 >100 0.75 98 <5 163 <0.5 53 0.30 14 20 12.6 1,940 1,490 3.5 7 <1 <1 0.17 9 3 0.24

Net Con Assay 13.82 752 25.5 >100 0.28 932 <5 37 <0.5 33 0.16 192 7 21.3 908 4,433 15.4 13 <1 2 0.07 3 1 0.09

93241 Float Tail Cut 1 0.58 - 0.12 12.2 0.13 32 - 24 - <2 0.09 0.8 - <1 32 94 0.5 - <3 - 0.03 <2 - 0.05

93242 Float Tail Cut 2 0.44 - - 12.9 0.19 49 <5 44 <0.5 23 0.11 1.3 4 <0.5 35.2 100 0.4 <5 <1 <1 0.05 2 <1 0.06




93245 Head 65 16 <0.01 0.7 135 1,680 <10 0.03 <1 <0.5 <10 <5 2.7 <10 <10 <5 <0.01 <5 <5 6.0 <1 2 3,760 <5

93225 Float Con 1 284 43 <0.01 118 100 21,100 <10 >10 384 <0.5 <10 <5 <0.5 <10 <10 <5 <0.01 <5 7 14.3 22 1 90,200 <593226 Float Con 2 308 312 <0.01 364 307 18,000 <10 >10 487 <0.5 <10 <5 <0.5 <10 <10 <5 <0.01 <5 6 21.6 <1 4 41,600 <593227 Float Con 3 429 428 <0.01 843 519 19,200 <10 7.7 316 <0.5 <10 <5 1.7 <10 <10 <5 <0.01 <5 9 31.3 <1 7 20,300 <593228 Float Con 4 519 417 <0.01 1,170 521 17,700 <10 5.4 260 <0.5 <10 <5 3.1 <10 <10 <5 0.01 <5 10 37.5 <1 8 12,200 <593229 Float Con 5 269 130 <0.01 447 315 4,040 <10 2.2 86 1.1 <10 <5 3.9 <10 <10 <5 <0.01 <5 6 22.5 <1 6 3,230 <593230 Float Con 6 495 202 0.01 1,070 491 6,300 <10 2.0 174 1.8 <10 <5 4.5 <10 <10 <5 0.01 <5 10 40.9 <1 9 4,030 <593231 Float Con 7 582 207 0.01 1,250 540 7,110 10 1.7 181 2.2 <10 <5 4.8 <10 <10 <5 0.01 <5 12 49.4 <1 11 4,070 <593232 Float Con 8 454 70 0.01 813 652 7,370 <10 0.1 69 1.9 <10 <5 6.6 <10 <10 <5 0.02 <5 9 40.0 <1 10 2,720 <5

Net Con Assay 334 148 <0.01 415 266 15,957 <10 ~7.3 307 0.8 <10 <5 1.8 <10 <10 <5 0.01 <5 7 22.4 ~11 4 51,273 <5

93241 Float Tail Cut 1 38 10 <0.01 14 70 599 - - 23 <1 - - 3 - - - <0.01 <10 - <1 <10 - 290 <593242 Float Tail Cut 2 52 12 <0.01 14 136 653 <10 0.02 15 0.5 <10 <5 3.2 <10 <10 <5 <0.01 <5 <5 6.3 <1 2 324 <5

NSS = Not Sufficient Sample

NSS values were normalized for mass-balance calculations





93245 Head 1.42 - 1.8 46.5 0.2 13 <5 48 <0.5 3 0.12 16 4 <0.5 6.9 189 0.51 <5 <1 <1 0.05 2 <1 0.06

93233 Float Con 1 20.30 791 41.9 >100 0.1 32 <5 26 <0.5 28 0.06 359 3 6.2 999 2,290 1.29 <5 8 <1 0.02 2 <1 0.03

93234 Float Con 2 20.00 1,073 13.7 >100 0.4 72 <5 120 <0.5 38 0.23 31 12 39.3 6,280 2,340 4.21 <5 <1 5 0.08 6 1 0.12

93235 Float Con 3 14.10 904 6.3 >100 0.5 36 <5 158 <0.5 26 0.27 21 16 44.8 7,020 1,870 4.74 5 <1 <1 0.10 8 2 0.15

93236 Float Con 4 5.87 NSS 2.4 >100 0.5 30 <5 100 <0.5 28 0.25 11 11 20.0 3,440 942 2.82 <5 <1 <1 0.10 5 2 0.15

93237 Float Con 5 5.14 326 1.7 >100 0.5 40 <5 121 <0.5 8 0.26 11 14 29.3 4,670 1,110 3.68 5 <1 <1 0.11 6 2 0.18

93238 Float Con 6 5.23 339 1.5 >100 0.7 54 <5 136 <0.5 16 0.27 11 17 31.5 4,970 1,430 4.41 6 <1 2 0.14 7 2 0.22

Net Con Assay 15.99 723 26.6 >100 0.3 38 <5 68 <0.5 26 0.14 217 8 17.4 2,779 1,980 2.42 ~5 ~5 1 0.06 4 1 0.09

93243 Float Tail Cut 1 0.38 - 0.07 11.5 0.14 32 - 31 - <2 0.09 0.8 - <1 68 93 0.47 - <3 - 0.03 <2 - 0.06

93244 Float Tail Cut 2 0.36 - - 11.9 0.2 34 <5 45 <0.5 23 0.11 1 4 0.7 82.3 93 0.43 <5 <1 <1 0.05 2 <1 0.06




93245 Head 65 16 <0.01 1 135 1,680 <10 0.03 <1 <0.5 <10 <5 2.7 <10 <10 <5 <0.01 <5 <5 6 <1 2 3,760 <5

93233 Float Con 1 370 21 <0.01 418 64 25,100 <10 0.05 122 <0.5 <10 <5 0.8 <10 <10 <5 <0.01 <5 <5 10 <1 1 93,200 <593234 Float Con 2 861 79 <0.01 2,640 398 17,400 <10 0.16 40 <0.5 <10 11 3.9 <10 <10 <5 0.01 <5 13 54 <1 6 15,200 <593235 Float Con 3 961 103 <0.01 3,050 435 18,300 <10 0.20 31 <0.5 <10 <5 5.5 <10 <10 <5 0.01 <5 15 64 <1 7 3,600 <593236 Float Con 4 522 47 <0.01 1,370 260 4,590 <10 0.08 17 1.1 <10 <5 4.5 <10 <10 <5 0.01 <5 9 36 <1 6 2,190 <593237 Float Con 5 689 69 <0.01 1,990 381 5,330 <10 0.10 3 1.4 <10 <5 5.6 <10 <10 <5 0.01 <5 12 50 <1 8 2,110 <593238 Float Con 6 754 74 0.01 2,130 477 5,770 <10 0.13 32 1.8 <10 <5 5.9 <10 <10 <5 0.02 <5 13 56 <1 9 2,310 <5

Net Con Assay 532 43 <0.01 1,176 202 18,867 <10 0.08 81 ~0.7 <10 ~5.5 2.6 <10 <10 <5 0.01 <5 8 28 <1 4 56,694 <5

93243 Float Tail Cut 1 43 10 <0.01 30 67 629 - - 25 <1 - - 3.0 - - - <0.01 <10 - <1 <10 - 291 <593244 Float Tail Cut 2 58 16 <0.01 35 122 642 <10 0.02 <1 0.5 <10 <5 3.2 <10 <10 <5 <0.01 <5 <5 7 <1 2 313 <5

NSS = Not Sufficient Sample

NSS values were normalized for mass-balance calculations


F.A LECO ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP ICP

Sample Sample Au S Au Ag Al As B Ba Be Bi Ca Cd Ce Co Cr Cu Fe Ga Hg In K La Li Mg

Name Description ppm % ppm ppm % ppm ppm ppm ppm ppm % ppm ppm ppm ppm ppm % ppm ppm ppm % ppm ppm %

93245 Head 1.42 1.8 - 46.5 0.20 13 <5 48 <0.5 3 0.12 16.1 4 <0.5 7 189 0.51 <5 <1 <1 0.05 2 <1 0.06

93247 1 hr CN 0.3 7.2

93248 6 hr CN 0.6 11.2

93249 24 hr CN 0.7 13.6

93250 48 hr CN 0.6 13.5

93251 Re-Pulp Wash 0.2 3.4

93252 Water Rinse 0.1 0.5

93253 CN Residue 0.10 - - 24 0.14 112 - 14 - <2 0.16 18.6 - 4 327 329 2.13 - <3 - 0.03 <2 - 0.07




93245 Head 65 16 <0.01 0.7 135 1,680 <10 0.03 <1 <0.5 <10 <5 2.7 <10 <10 <5 <0.01 <5 <5 6 <1 2 3,760 <5

93247 1 hr CN

93248 6 hr CN

93249 24 hr CN

93250 48 hr CN

93251 Re-Pulp Wash

93252 Water Rinse

93253 CN Residue 83 19 <0.01 144 76 1,817 - - 56 <1 - - 3 - - - <0.01 <10 - <1 <10 - 4,457 <5





93319 Head 0.86 35 - 26.3 1.48 59 5 123 <0.5 <1 0.39 34.6 2 7.9 21 618 3.4 <5 3 <1 0.53 1 4 1.1

93300 Pan Con 1 52.20 149 -

93301 Pan Mid 1 9.19 76 -

93302 Pan Con 2 62.70 1,856 -

93303 Pan Mid 2 9.40 127 -

Net Con Assay 18.00 222 -

93304 Tail Cut 1 0.55 22 - 23.4 1.53 49 <5 115 <0.5 2 0.42 41.1 3 9.2 331 621 2.7 <5 1 <1 0.54 1 4 1.1

93305 Tail Cut 2 0.49 21 - 22.8 1.56 48 <5 128 <0.5 2 0.42 39.6 4 8.9 313 607 2.7 <5 <1 2 0.54 1 4 1.1




93319 Head 435 10 0.07 7 393 1,030 31 2.67 16 4.2 <10 <5 21.6 <10 <10 <5 0.06 <5 <5 51.4 13 4 5,850 <5

93300 Pan Con 1

93301 Pan Mid 1

93302 Pan Con 2

93303 Pan Mid 2

Net Con Assay

93304 Tail Cut 1 453 13 0.07 140 406 699 33 2.35 12 4.5 <10 5 20.8 <10 11 <5 0.05 <5 <5 60.2 15 4 6,040 <593305 Tail Cut 2 454 13 0.08 133 392 679 33 2.33 12 4.4 <10 5 21.4 <10 15 <5 0.05 6 <5 60.0 14 4 5,850 <5





93308 Cleaner Con 1 7.11 329 42.9 >100 0.30 438 13 3 <0.5 15 0.08 703 2 84.4 348 8,480 22.3 17 17 6 0.10 <1 <1 0.2

93309 Cleaner Con 2 7.59 328 33.7 >100 0.71 575 18 16 <0.5 16 0.18 394 4 86.0 1,210 8,170 20.8 14 11 2 0.24 <1 2 0.5

93310 Cleaner Con 3 4.74 151 16.1 NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS

93311 Cleaner Tail Cut 1 0.80 34 - 35.1 2.54 71 <5 212 <0.5 2 0.59 9 9 21.3 2,440 629 3.9 7 <1 <1 0.86 4 7 2.1

93312 Cleaner Tail Cut 2 0.78 35 - 36.5 2.65 75 <5 233 <0.5 <1 0.61 9 10 22.7 2,610 663 4.0 7 <1 ~3 0.90 4 8 2.2

93306 Rougher Tail Cut 1 0.20 <5 - 4.5 1.64 16 <5 160 <0.5 1 0.43 1 5 2.0 212 88 1.0 <5 <1 2 0.56 2 4 1.2

93307 Rougher Tail Cut 2 0.21 <5 - 4.5 1.62 16 <5 160 <0.5 1 0.44 1 5 2.1 215 84 1.1 <5 <1 <1 0.57 2 4 1.2




93308 Cleaner Con 1 443 16 <0.01 184 114 4,410 <10 23.7 120 <0.5 16 <5 <0.5 <10 <10 <5 0.01 <5 5 5.6 30.3 1 118,000 <593309 Cleaner Con 2 506 27 0.02 525 287 5,250 13 22.2 113 1.7 <10 <5 <0.5 <10 <10 <5 0.02 <5 5 24.7 27.7 3 66,700 <593310 Cleaner Con 3 NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS NSS93311 Cleaner Tail Cut 1 1,000 37 0.08 993 861 2,020 60 1.7 5 7.5 <10 11 24.5 <10 <10 <5 0.09 7 5 107.0 49.0 8 1,340 <593312 Cleaner Tail Cut 2 1,060 39 0.09 1,060 911 2,100 64 1.7 4 8.0 <10 12 25.7 <10 <10 <5 0.09 <5 5 113.0 54.0 9 1,400 <5

93306 Rougher Tail Cut 1 460 7 0.08 83 424 332 35 0.1 4 4.9 <10 6 23.7 <10 <10 <5 0.06 <5 <5 65.5 8.0 4 307 <593307 Rougher Tail Cut 2 451 7 0.08 86 425 320 35 0.1 4 4.7 <10 5 24.4 <10 <10 <5 0.06 <5 <5 64.5 5.0 4 298 <5

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MS1438 Electra Gold - HomeGold Resources Ltdhomegoldresourcesltd.com/projects/GoldenRidge/MS1438 - Electra Gold...MS1438 – Electra Gold Prepared for ... Determine cyanide leach recovery