Commonwealth Silver Intercepts 106 Meters of 107 g/t AgEq at Commonwealth Project in Southern Arizona
June 04 2012 - 1:42PM
Marketwired Canada
Commonwealth Silver and Gold Mining Inc. ("Commonwealth Silver" or the
"Company") is pleased to announce the assay results of the recently completed
Phase II, 35-hole, 5,000 meter diamond drilling program at its Commonwealth
silver and gold project in Cochise County, Arizona, approximately 120 km (75
miles) southeast of Tucson. Drilling commenced on November 21, 2011 and was
completed on April 2, 2012.
Results from the 35-hole diamond drilling program have extended the known
mineralized body to the east, to the north and to the south (down-dip). Results
of the program have generally been at grades exceeding the average grade of the
current National Instrument 43-101 ("NI 43-101") mineral resource estimate.
Highlights from the drilling program include:
-- CSG-021 returned 39.00 meters of 200.22 g/t AgEq starting at 108.00
meters (1.16 g/t Au and 136.52 g/t Ag). Within this intercept were
higher grade zones including 17.00 meters of 376.54 g/t AgEq starting at
110.00 meters (2.42 g/t Au and 243.18 g/t Ag). Hole CSG-021 also
returned an additional 25.00 meters of 79.21 g/t AgEq starting at 155.00
meters (0.66 g/t Au and 42.66 g/t Ag), including 3.05 meters of 325.22
g/t AgEq starting at 170.69 meters (3.09 g/t Au and 155.02 g/t Ag).
-- CSG-037 returned 83.00 meters of 95.33 g/t AgEq starting at 69.00 meters
(0.46 g/t Au and 70.18 g/t Ag). This intercept includes 16.85 meters of
194.75 g/t AuEq starting at 82.75 meters (0.73 g/t Au and 154.82 g/t
Ag).
-- CSG-040 returned 105.73 meters of 106.94 g/t AgEq starting at 36.27
meters (0.26 g/t Au and 92.39 g/t Ag). This intercept includes 25.00
meters of 226.31 g/t AgEq starting at 84.00 meters (0.62 g/t Au and
192.24 g/t Ag).
-- CSG-042 returned 15.30 meters of 389.36 g/t AgEq starting at 62.00
meters (0.68 g/t Au and 352.24 g/t Ag).
-- CSG-045 returned 43.00 meters of 138.29 g/t AgEq starting at 123.00
meters (1.20 g/t Au and 72.39 g/t Ag).
-- CSG-051 returned 21.00 meters of 189.51 g/t AgEq starting at 139.00
meters (1.28 g/t Au and 118.92 g/t Ag). This intercept includes 7.92
meters of 373.97 g/t AgEq starting at 140.08 meters (3.06 g/t Au and
205.42 g/t Ag).
All drill results from the recently completed 35-hole, 5,000 meter diamond
drilling program are tabulated below. Intercepts were calculated using a 25.0
g/t silver equivalent ("AgEq") cut-off and silver equivalent was calculated
using a 55:1 gold to silver price ratio. Silver equivalent grades reflect gross
metal content and have not been adjusted for metallurgical recoveries. All
intercepts are reported as apparent widths, and true widths will be shorter.
Drill hole location maps showing the location of historic drilling performed by
other operators and Commonwealth Silver Phase I, 16-hole, 2,000 meter drilling
program can be found as Appendix A and including the addition of this Phase II
drilling program found in Appendix B to this news release.
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Drill Intercept Table
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At
Total 55:1
Hole Intercept Au Ag AgEq
Depth From Interval grade grade grade
Hole ID (m) (m) To (m) (m) (g/t) (g/t) (g/t)
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CSG-017 81.08 0.00 31.85 31.85 0.28 16.24 31.70
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CSG-018 100.58 0.00 17.00 17.00 0.21 36.55 48.23
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CSG-019 60.05 0.00 10.00 10.00 0.92 28.68 79.02
CSG-019 including 7.00 9.00 2.00 2.84 21.23 177.29
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----------------------------------------------------------------------------
CSG-020 144.78 44.00 50.50 6.50 0.24 56.69 69.96
CSG-020 and 68.00 116.00 48.00 0.10 66.87 72.36
CSG-020 including 105.00 110.64 5.64 0.57 222.18 253.80
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CSG-021 200.25 108.00 147.00 39.00 1.16 136.52 200.22
CSG-021 including 110.00 127.00 17.00 2.42 243.18 376.54
CSG-021 and 155.00 180.00 25.00 0.66 42.66 79.21
CSG-021 including 170.69 173.74 3.05 3.09 155.02 325.22
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CSG-022 161.54 103.00 122.00 19.00 0.09 89.98 94.86
CSG-022 including 103.00 112.00 9.00 0.07 147.70 151.47
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CSG-023 99.97 58.00 64.00 6.00 0.58 6.63 38.53
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CSG-024 53.95 Hole terminated prior to reaching target
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CSG-025 98.76 Hole terminated prior to reaching target
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CSG-026 163.68 20.00 25.00 5.00 0.20 30.04 40.94
CSG-026 and 29.00 50.00 21.00 0.15 41.29 49.46
CSG-026 and 86.00 92.50 6.50 0.18 18.50 28.61
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CSG-027 199.03 No significant intercept
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CSG-028 151.49 53.50 63.00 9.50 1.83 40.24 140.96
CSG-028 including 54.00 58.00 4.00 3.88 79.73 293.26
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CSG-029 157.58 22.00 27.00 5.00 0.03 36.14 37.71
CSG-029 and 74.22 118.00 43.78 0.15 57.85 66.28
CSG-029 and 124.00 130.68 6.68 0.23 62.89 75.28
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CSG-030 169.47 141.00 157.00 16.00 0.45 44.36 69.03
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CSG-031 239.88 29.00 34.00 5.00 0.17 99.65 108.90
CSG-031 and 183.00 190.20 7.20 1.28 23.57 93.97
----------------------------------------------------------------------------
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CSG-032 201.17 170.00 172.00 2.00 0.27 121.00 135.63
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CSG-033 168.55 102.34 115.00 12.66 0.17 67.87 77.34
CSG-033 and 119.00 147.00 28.00 0.12 44.22 50.87
----------------------------------------------------------------------------
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CSG-034 139.29 112.00 123.00 11.00 0.18 87.80 97.90
CSG-034 including 113.00 116.20 3.20 0.10 196.18 201.44
----------------------------------------------------------------------------
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CSG-035 191.11 140.00 149.81 9.81 0.08 36.15 40.64
CSG-035 and 162.80 172.00 9.20 0.40 10.97 32.83
----------------------------------------------------------------------------
----------------------------------------------------------------------------
CSG-036 188.06 127.00 131.54 4.54 0.28 27.35 42.99
CSG-036 and 137.00 144.00 7.00 0.18 22.74 32.56
CSG-036 and 163.10 166.50 3.40 1.55 26.53 111.86
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CSG-037 169.01 69.00 152.00 83.00 0.46 70.18 95.33
CSG-037 including 82.75 99.60 16.85 0.73 154.82 194.75
CSG-037 and 131.52 136.00 4.48 1.60 76.44 164.45
----------------------------------------------------------------------------
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CSG-038 141.73 62.00 91.00 29.00 0.14 40.95 48.81
CSG-038 and 107.00 124.00 17.00 0.07 42.83 46.41
----------------------------------------------------------------------------
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CSG-039 149.35 85.00 121.30 36.30 0.23 90.27 103.07
CSG-039 including 101.40 108.00 6.60 0.40 216.80 238.64
----------------------------------------------------------------------------
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CSG-040 157.89 36.27 142.00 105.73 0.26 92.39 106.94
CSG-040 including 84.00 109.00 25.00 0.62 192.24 226.31
and
CSG-040 including 112.36 121.00 8.64 0.68 133.33 170.78
----------------------------------------------------------------------------
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CSG-041 80.62 Hole terminated prior to reaching target
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CSG-042 151.18 62.00 77.30 15.30 0.68 352.24 389.46
CSG-042 and 89.36 95.08 5.72 0.29 28.95 45.06
----------------------------------------------------------------------------
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CSG-043 56.10 34.00 41.76 7.76 0.02 46.19 47.06
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CSG-044 195.07 29.26 41.60 12.34 0.20 126.77 137.76
CSG-044 and 72.00 94.00 22.00 0.01 61.31 61.87
CSG-044 and 104.00 116.00 12.00 0.05 45.93 48.90
CSG-044 and 121.00 149.00 28.00 0.32 67.90 85.57
CSG-044 and 181.60 185.93 4.33 1.27 20.15 90.09
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CSG-045 178.92 123.00 166.00 43.00 1.20 72.39 138.29
CSG-045 including 126.05 131.00 4.95 3.07 125.73 294.68
and
CSG-045 including 134.00 148.89 14.89 1.49 82.24 164.40
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CSG-046 66.90 Hole terminated prior to reaching target
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CSG-047 151.49 108.00 144.00 36.00 0.61 69.34 102.88
CSG-047 including 109.00 116.00 7.00 1.08 185.66 245.15
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CSG-048 145.08 74.95 78.00 3.05 0.12 103.32 109.72
CSG-048 and 102.00 130.00 28.00 0.42 61.10 84.01
CSG-048 including 107.00 111.71 4.71 0.42 152.90 176.22
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CSG-049 171.75 16.00 34.00 18.00 0.01 59.56 60.06
CSG-049 and 113.00 161.00 48.00 0.51 62.09 89.93
CSG-049 including 114.50 127.00 12.50 0.46 109.25 134.30
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CSG-050 47.55 Hole terminated prior to reaching target
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CSG-051 199.95 55.00 63.00 8.00 0.01 43.41 44.00
CSG-051 and 72.00 78.00 6.00 0.05 47.43 50.35
CSG-051 and 139.00 160.00 21.00 1.28 118.92 189.51
CSG-051 including 140.08 148.00 7.92 3.06 205.42 373.97
----------------------------------------------------------------------------
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Total meters drilled - 5,032.86
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Michael Farrant, President and Chief Executive Officer stated, "It is our
opinion that in addition to having what we believe is an economic open pit
mineable silver-gold deposit with an extremely low strip ratio of 1.7, these
results have demonstrated higher grade zones at good mineable widths at depth
representing the potential for underground mining part of the deposit. We are
extremely pleased with the results of this second drilling program. They have
exceeded our expectations and demonstrate the potential for significant
additions to the existing estimated mineral resources at Commonwealth."
Hall Stewart, Vice President, Exploration stated, "The deeper intercepts
encountered in holes CSG-040, CSG-044, CSG-049 and CSG-051, all of which are the
deepest holes on their respective cross sections and the much higher grades in
hole CSG-051, give us tremendous encouragement that the deposit continues to be
open at depth and appears be increasing in grade. There continues to be apparent
similarities to the large Mexican silver-gold deposits at Ocampo and Palmarejo.
Using those deposits as analogs, it is possible that the Commonwealth deposit
may extend several hundred meters below the current level of drilling."
Program Update
The 35-hole, 5,000 meter Phase II drilling program at the Commonwealth Project
was directed at four main objectives:
Infill and Down-dip Drilling (17 holes)
Holes CSG-021, CSG-026, CSG-031, CSG-037, CSG-040 to CSG-051 were drilled as
infill or down-dip step out holes. All 13 holes that were completed (CSG-041,
CSG-046 and CSG-050 were abandoned due to difficult drilling conditions),
returned excellent results. It is expected that the assay results from the
infill drilling will increase the average grade of the current mineral resource
estimate, to a slight degree and that the down dip holes, especially holes
CSG-040, CSG-044, CSG-049 and CSG-051 demonstrate that the deposit is open at
depth and warrants further drilling.
Eastern Step-out Along the Structural Wedge Target (12 holes)
Holes CGS-020, CSG-022, CSG-029, CSG-030 and CSG-032 to CSG-038 were drilled as
step-out holes following the mineralized wedge between the Main Vein and the
North Vein to the east. The easternmost holes CSG-022, CGS-030 and CSG-034 all
show significant mineralized widths near or above the average grade of the
current mineral resource estimate. The deposit remains open to the east and
further drilling is warranted.
Eisenhart Vein - North Pit Limit (4 holes)
Holes CSG-017 to CSG-019 and CSG-028 were drilled targeting the Eisenhart Vein
and mineralization in the Bisbee Group sediments along the north edge of the
current mineral resource estimate area. Assay results from this drilling were
very positive, however, additional drilling is required to define a mineral
resource estimate in this area.
Western Extension of the Main Vein (4 holes)
Holes CSG-023 to CSG-025 and CSG-027 were drilled attempting to intercept the
Main Vein west of previous drilling. Hole CSG-023 encountered a weak mineralized
intercept that is not considered worth following up at this time. Hole CSG-024
crossed the trace of the structure still in alluvium, however, the vein was
eroded away at this point. CSG-025 was lost due to difficult drilling conditions
and CSG-027, drilled to replace CSG-025, did not encounter any significant
mineralization. At this point, the deposit is considered closed off to the west.
Project Summary
The Commonwealth Project is an advanced exploration development project located
in the historic Pearce mining district in southeastern Arizona. The mineral
deposits on the Project are typical silver dominant, low sulfidation epithermal
veins and stockworks. Production at the Commonwealth Mine began in 1895, with
commercial scale mining of the high grade ores ending in the late 1920's.
Historic production was approximately 12 million ounces of silver and 138,000
ounces of gold, making it Arizona's second largest historic primary silver
producer.
The two most important veins are the Main Vein and the North Vein. Between these
two veins lies a wedge of volcanic rocks with well-developed quartz stockwork
veining which is mineralized with silver and gold. The vein system has been
mapped over 1 km of strike length and continues to the east under alluvial
cover. Drilling has tested at least 800 meters of this strike length to a
maximum depth of just over 200 meters. The results of this drilling program have
confirmed that there is significant potential for extensions to the known vein
system both east and down dip. All the known veins in the district have a
combined strike length of over 4.5 km.
The initial NI 43-101 compliant mineral resource estimate on the Commonwealth
Project, dated October 6, 2011, estimated by SRK Consulting (U.S.), Inc. ("SRK
Consulting"), stands at 17.598 million tonnes grading an average of 0.51 g/t Au
and 43.75 g/t Ag classified as Indicated mineral resources (39.829 million
silver equivalent ounces at an average grade of 70.40 g/t AgEq) with an
additional 1.089 million tonnes grading an average of 0.31 g/t Au and 35.74 g/t
Ag classified as Inferred mineral resources (1.818 million silver equivalent
ounces at an average grade of 51.94 g/t AgEq). The resource is stated above a
26.0 g/t silver equivalent cut-off and contained within an open pit. Silver
equivalent ounces and grade were calculated using a 52:1 gold to silver price
ratio. The mineralized body is entirely oxidized with oxidation extending beyond
the limits of existing drilling.
Based on the exceptional results of this drilling program, the Company intends
to update the current NI 43-101 mineral resource estimate.
Assaying and QA/QC
After project geologists logged and marked the core, technicians cut the
individual lengths with a diamond saw, then bag the samples, tag the bags and
secure them with security clips. The samples were then shipped by UPS to ALS
Minerals in Reno, Nevada. Samples were analyzed for gold by fire assay with
Atomic Absorption ("AA") finish. Silver analysis was included in a 30 element
Inductivity Coupled Plasma ("ICP") analysis (using a four-acid digest) conducted
on all samples. Gold and silver overlimit assays were analyzed by fire assay
with a gravimetric finish. All drilling by Commonwealth Silver has included a
rigorous QA/QC program monitoring sample quality. Commonwealth Silver inserts
assay standards, blanks and duplicate samples into the sample stream and
performs statistical review of the results.
Qualified Person
This technical information in this news release has been reviewed and approved
by Mr. Hall Stewart, B.Sc., C.P.G., R.G., Commonwealth Silver's Vice President,
Exploration and a Qualified Person as defined under NI 43-101.
About Commonwealth Silver and Gold Mining Inc.
Commonwealth Silver is a private Canadian mineral exploration and development
company focused on acquiring gold and silver properties in Arizona and advancing
them towards production. The Company comprises an experienced management group
with a strong background in all aspects of acquisition, exploration, development
and financing of precious metals mining projects.
For further information on Commonwealth Silver please visit
www.commonwealthsilver.ca.
CAUTIONARY NOTE REGARDING FORWARD LOOKING INFORMATION
This news release contains certain "forward-looking information" under Canadian
securities laws. All statements that address future plans, activities, events or
developments that the Company believes, expects or anticipates will or may occur
are forward-looking information. This can include, but is not limited to
comments regarding the timing and content of upcoming work programs, geological
interpretations, receipt of property titles, potential mineral recovery
processes etc. Forward-looking information addresses future events and
conditions and therefore involves inherent risks and uncertainties. There can be
no assurance that outcomes anticipated in the forward-looking information will
occur and actual results may differ materially from those currently anticipated
in such statements. Accordingly, readers should not place undue reliance on
forward-looking information. The Company undertakes no obligation to update
publicly or otherwise any forward-looking information, except as may be required
by law.
To view Appendix A and Appendix B, please visit the following link:
http://media3.marketwire.com/docs/commonwealth_pr_app_june04.pdf
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