Download CDN-GS-10E - CDN Resource Laboratories Ltd.

CDN Resource Laboratories Ltd.
#2, 20148 - 102nd Avenue, Langley, B.C., Canada, V1M 4B4, Ph: 604-882-8422 Fax: 604-882-8466
(www.cdnlabs.com)
GOLD ORE REFERENCE STANDARD: CDN-GS-10E
Recommended value and the "Between Laboratory" two standard deviations
Gold
9.59 g/t
± 0.53 g/t
Certified value
30g FA / Gravimetric
PREPARED BY:
CDN Resource Laboratories Ltd.
CERTIFIED BY:
Duncan Sanderson, B.Sc., Licensed Assayer of British Columbia
INDEPENDENT GEOCHEMIST: Dr. Barry Smee., Ph.D., P. Geo.
DATE OF CERTIFICATION: October 1, 2015
ORIGIN OF REFERENCE MATERIAL:
Standard CDN-GS-10E was prepared by blending 430 kg of gold ore with 370 kg of granite.
METHOD OF PREPARATION:
Reject ore material was dried, crushed, pulverized and then passed through a 270 mesh screen. The +270 material was discarded.
The -270 material was mixed in a double-cone blender for 5 days. Splits were taken and sent to 15 commercial laboratories for
round robin assaying. Round robin results are displayed below:
Lab 1
Lab 2
Lab 3
Lab 4
Lab 5
Lab 6
Lab 7
Lab 8
Lab 9
Lab 10
Lab 11
Lab 12
Lab 13
Lab 14
Lab 15
SAMPLE
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
Au g/t
GS-10E-1
9.62
10.30
9.59
9.76
9.88
9.22
9.33
10.25
9.54
9.82
10.09
9.15
9.93
9.24
9.58
GS-10E-2
9.29
10.10
10.00
9.69
9.52
9.28
9.84
9.88
9.50
9.75
10.03
9.58
9.33
9.29
9.40
GS-10E-3
9.42
9.97
9.67
9.06
9.34
9.49
9.81
9.86
9.89
9.71
10.05
9.26
9.57
9.82
9.53
GS-10E-4
9.14
9.66
9.87
9.98
9.37
9.24
9.43
10.40
9.56
9.70
9.76
9.10
9.27
9.84
9.49
GS-10E-5
9.58
9.67
9.43
9.38
9.98
9.23
9.50
9.96
9.92
9.66
9.69
9.26
9.27
9.31
9.72
GS-10E-6
8.81
9.76
9.53
9.47
9.32
9.80
9.70
9.71
9.46
9.71
9.01
9.15
9.77
9.35
9.42
GS-10E-7
9.45
10.00
9.53
9.30
9.40
9.68
10.00
9.49
9.76
9.74
9.81
9.59
10.00
8.87
9.43
GS-10E-8
9.42
9.81
10.10
9.09
9.60
9.83
9.50
9.51
9.68
9.74
9.99
9.19
9.47
9.52
9.64
GS-10E-9
9.75
10.00
9.47
9.59
9.79
9.37
10.10
9.56
9.40
9.82
9.94
9.28
9.63
10.05
9.61
GS-10E-10
10.29
9.66
9.55
9.12
9.52
9.48
9.46
9.91
9.55
9.66
9.13
9.49
9.33
9.41
9.46
Mean
Std. Dev'n
%RSD
9.48
9.89
9.67
9.44
9.57
9.46
9.67
9.85
9.63
9.73
9.75
9.30
9.56
9.47
9.53
0.3898
0.2161
0.2336
0.3113
0.2364
0.2361
0.2621
0.3033
0.1792
0.0543
0.3825
0.1812
0.2717
0.3479
0.1067
4.11
2.18
2.42
3.30
2.47
2.49
2.71
3.08
1.86
0.56
3.92
1.95
2.84
3.67
1.12
APPROXIMATE CHEMICAL COMPOSITION (by whole rock analysis):
SiO2
Al2O3
Fe2O3
CaO
MnO
Total S
Percent
61.8
14.0
7.2
4.2
<0.1
2.3
Na2O
MgO
K2O
TiO2
LOI
Total C
Percent
1.6
3.7
2.9
0.4
2.5
<0.1
GOLD ORE REFERENCE STANDARD: CDN-GS-10E
Statistical Procedures:
The final limits were calculated after first determining if all data was compatible within a spread normally expected for similar
analytical methods done by reputable laboratories. Data from any one laboratory was removed from further calculations when the
mean of all analyses from that laboratory failed a t test of the global means of the other laboratories. The mean and standard
deviation were calculated using all remaining data. Any analysis that fell outside of the mean ±2 standard deviations was removed
from the ensuing data base. The mean and standard deviations were again calculated using the remaining data. This method is
different from that used by Government agencies in that the actual “between-laboratory” standard deviation is used in the
calculations. This produces upper and lower limits that reflect actual individual analyses rather than a grouped set of analyses. The
limits can therefore be used to monitor accuracy from individual analyses, unlike the Confidence Limits published on other
standards.
Participating Laboratories:
(not in same order as table of assays)
Bureau Veritas, Vancouver, British Columbia, Canada
Accurassay, Thunder Bay, Ontario, Canada
Activation Laboratories, Ancaster, Ontario, Canada
Activation Laboratories, Thunder Bay, Ontario, Canada
American Assay Laboratories, Nevada, United States
ALS Canada, North Vancouver, British Columbia, Canada
ALS Reno, Nevada, United States
Argetest, Ankara, Turkey
Certimin, Lima, Peru
Met-Solve Analytical, Langley, British Columbia, Canada
ALS Loughrea (OMAC), Ireland
Skyline Assayers & Laboratories Ltd, Arizona, United States
SGS, Vancouver, British Columbia, Canada
SGS, Lima, Peru
TSL Laboratories Ltd., Saskatoon, Saskatchewan, Canada
Legal Notice:
This certificate and the reference material described in it have been prepared with due care and attention. However CDN Resource
Laboratories Ltd. nor Barry Smee accept any liability for any decisions or actions taken following the use of the reference material.
Our liability is limited solely to the cost of the reference material.
Certified by
_____________________________________
Duncan Sanderson, Certified Assayer of B.C.
Geochemist
_____________________________________
Dr. Barry Smee, Ph.D., P. Geo.