Cobriza Intersects 142 Metres of 0.51% Copper Equivalent at Arikepay Copper-Gold Porphyry Discovery
12.07.2012 | Marketwire
Editors Note: There is an image associated with this release.VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 07/12/12 -- Cobriza Metals Corp. (TSX: CZA) ("Cobriza") is pleased to announce that additional significant copper-gold-silver ("Cu-Au-Ag") mineralization has been intersected in what is now considered to be a new porphyry discovery at the Arikepay project, Peru. Highlights of these new results include:
RC-12-ARI-006: 238m averaging 0.29% Cu, 0.13 g/t Au and 1.7 g/t Ag (0.39% Cu Eq(i))
including: 142m averaging 0.36% Cu, 0.17 g/t Au and 2.0 g/t Ag (0.51% Cu Eq(i))
RC-12-ARI-005: 80m averaging 0.12% Cu, 0.32 g/t Au and 1.0 g/t Ag (0.35% Cu Eq(i))
"This is an impressive discovery of a very large porphyry Cu-Au system which is mostly concealed by younger gravel cover deposits. These results indicate that mineralization at the Arikepay porphyry system is potentially strengthening northward from the area of sparsely exposed altered outcrop. Results from the final four drill holes are expected within the next two weeks, and we will be better able to fully assess this discovery and consider our options at that time," commented Michael Thicke, President of Cobriza Metals.
Results have been received for an additional seven drill holes (RC-12-ARI-004 through 010) from this initial drilling program at Arikepay. Results of these new holes and those from previously reported RC-12-ARI-001-003 (CZA NR-004 dated July 3, 2012) are in Table 1 below.
A map of all 14 drill hole locations from the Arikepay drill program is below and can also be downloaded from www.cobrizametals.com/CZANR005Map.pdf
----------------------------------------------------------------------------
Table 1 - Arikepay Project, Peru: Complete RC Drilling Summary to July 9,
2012
----------------------------------------------------------------------------
Total
Length From To Width Cu Au Ag Cu Eq(i)
Hole (m) (m) (m) (m) (%) (g/t) (g/t) (%)
----------------------------------------------------------------------------
RC-12-ARI-001 300 0 300 300 0.07% 0.11 1.5 0.16%
including 0 16 16 0.15% 0.05 0.6 0.19%
----------------------------------------------------------------------------
RC-12-ARI-002 300 8 300 292 0.08% 0.39 2.7 0.39%
including 8 70 68 0.13% 0.75 3.2 0.70%
including 254 300 46 0.11% 0.19 2.2 0.27%
----------------------------------------------------------------------------
RC-12-ARI-003 300 32 300 268 0.17% 0.09 5.1 0.29%
including 70 216 146 0.16% 0.08 8.2 0.31%
----------------------------------------------------------------------------
RC-12-ARI-004 200 No Significant Values
----------------------------------------------------------------------------
RC-12-ARI-005 300 64 300 236 0.12% 0.19 1.2 0.26%
including 64 144 80 0.12% 0.32 1.0 0.35%
246 284 38 0.17% 0.16 1.6 0.30%
----------------------------------------------------------------------------
RC-12-ARI-006 300 62 300 238 0.29% 0.13 1.7 0.39%
including 62 204 142 0.36% 0.17 2.0 0.51%
----------------------------------------------------------------------------
RC-12-ARI-007 300 144 300 156 0.06% 0.02 0.7 0.08%
including 144 164 20 0.10% 0.04 0.5 0.14%
----------------------------------------------------------------------------
RC-12-ARI-008 300 148 300 152 0.05% 0.03 0.5 0.09%
----------------------------------------------------------------------------
RC-12-ARI-009 200 No Significant Values
----------------------------------------------------------------------------
RC-12-ARI-010 220 No Significant Values
----------------------------------------------------------------------------
(i) Copper equivalent (Cu Eq) grades include gold and silver values based on
100% metal recoveries and the following metal price assumptions: US$1,200
per troy ounce gold, US$20 per troy ounce silver, and US$2.50 per pound
copper.
Four of the six initial drill holes at Arikepay have now returned long intervals of significant copper-gold-silver (highlighted in Table 1 above), all of which were stopped in mineralization, including:
- 292m of 0.39% Cu Eq(i) in hole RC-12-ARI-002
- 146m of 0.31% Cu Eq(i) in hole RC-12-ARI-003
- 80m of 0.35% Cu Eq(i) in hole RC-12-ARI-005, and
- 142m of 0.51% Cu Eq(i) in hole RC-12-ARI-006
Holes RC-12-ARI-005 and 006 both encountered significant sulphide mineralization for their entirety and ended in mineralization but the holes were stopped due to achieving maximum drill machine depth capacity. While holes RC-12-ARI-007 and 008 did not intersect as strong copper values, they do contain strongly anomalous copper over their entirety.
These holes are located between 400m and 1,600m north to north-northwest of the area of sparsely exposed altered outcrop, and all were collared in gravel cover with depth to basement ranging from 36-148m. Holes RC-12-ARI-004, 007, 009 and 010 show characteristics of moderate to strong propylitic alteration containing variable concentrations of pyrite mineralization and weak to anomalous copper values, situated immediately peripheral to the zone of significant sulphide mineralization.
Holes RC-12-ARI-001-003, 005, 006 and 008, from within the main zone of sulphide mineralization, encountered phyllic alteration (over propylitic and possibly potassic alteration) with heavy pyrite mineralization and significant Cu-Au-Ag mineralization, currently identified over an area of approximately 1,000m x 600m, and open to the north and at depth.
Sample Preparation and Analysis
Five kilogram (kg) samples were collected at 2m intervals from each RC hole, placed in plastic sample bags and sent to SGS Laboratories in Lima, Peru for preparation and analysis. Each sample was dried (if necessary) crushed to -10 mesh, homogenized and reduced to a 250 gram sample using a riffle divisor. The 250 gram sample was pulverized to -140 mesh. Gold analysis was done by fire assay with an atomic absorption finish and copper, silver, and molybdenum values were determined by ICP. Every 25m in each hole a blank, standard, or duplicate sample was inserted.
About Cobriza Metals
Cobriza Metals Corp. is a TSX listed mineral exploration company focused on exploration and development of base metal mining projects in Peru and Latin America, initially focused on exploration of three of its 100% owned projects: Arikepay, Don Gregorio, and Miraflores.
The Arikepay property is road accessible approximately 110 km south of the city of Arequipa, and lies 45 km south of the 3.5 billion tonne Cerro Verde copper-molybdenum mine (Freeport 54%, SMM Cerro Verde Netherlands 21%, and Buenaventura 19%) in southern Peru.
Don Gregorio is a 2,700 ha under-explored porphyry copper-gold system located approximately 140 km north-northeast of Chiclayo in northern Peru. Previous exploration by other companies included 1,648m drilled in 12 holes, with assays from this work including 153.3m of 0.394% copper and 0.18 grams per tonne gold.
Miraflores is a 100% owned, 1,800 hectare (ha) under-explored porphyry copper-gold-molybdenum system in northern Peru, 70 km NE of Trujillo. Surface rock sampling includes copper grades of up to 1.2%, gold grades of up to 15 g/t, and molybdenum grades of up to 200 ppm.
Michael J. Thicke, P.Geo., President and Joanne C. Freeze, P.Geo., CEO, are the Qualified Persons as defined by National Instrument 43-101 for all of the projects discussed above. They have reviewed and approved the contents of this release.
Cautionary Note Regarding Forward-Looking Statements
This news release may contain forward-looking statements including but not limited to comments regarding the timing and content of upcoming work programs, geotechnical assumptions, geological interpretations, receipt of property titles or permits, potential mineral recovery processes, etc. Forward-looking statements address future events and conditions and therefore involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements. Cobriza Metals relies upon litigation protection for forward-looking statements.
On behalf of the Board of Cobriza Metals Corp.
Michael Thicke M.Sc., P.Geo.
President & Director
To view the image associated with this release, please visit the following link:
www.marketwire.com/library/20120712-cza_F1-lg.jpg.
Contacts:
Cobriza Metals Corp.
John Foulkes, VP Corporate Development
local: + 1 (604) 689-1957 ext 2
toll free: 1 (877) 689-1964 ext 2
info@cobrizametals.com
Cobriza Metals Corp.
Walter Spagnuolo, Manager, Investor Relations
mobile: +1 (604) 306-8477
local: + 1 (604) 689-1957 ext 3
www.cobrizametals.com