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| | Tue Jul 29, 2008
ROCA - Drilling Intersects Significant Tungsten Mineralization Above MAX Mine
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| | Vancouver, British Columbia: Roca Mines Inc. (ROK: TSX-V) ("Roca" or "the Company") reports that its recent surface diamond-drilling program conducted on the southern portion of the Ridge Tungsten Zone at the MAX project has intersected significant intervals and grades of tungsten mineralization. Combined with past work, the recent results suggest great potential for a new tungsten resource to be defined at MAX based on the exceptional continuity observed. The mineralization was intersected above and in close proximity to the producing MAX Mine. At their lowest point, the tungsten intervals are located approximately 650 metres (m) above the Main Haulage Adit level of the MAX Mine.
Roca's initial program was designed to test downdip continuity as well as for potential grade increase closer to the MAX intrusions. Each of the four drillholes successfully intersected tungsten mineralization occurring as scheelite in garnet diopside-rich skarn layers. In addition, grades appear to be increasing with depth as evident in Drillhole MM-08-07 which intersected 0.504% WO3 over 13.10m (estimated 12.5m true thickness) at a downhole depth of 167.80m.
Previous surface mapping and prospecting by ROCA extended the zone of scheelite/skarn mineralization over a strike length of 1,400m. Recent drilling took place on the southern portion of the area where three widely-spaced and shallow holes were drilled in 1979 (see Roca news release dated Dec 12, 2006). This recent drill program also discovered a new, lower mineralized skarn band, including; MM-08-05 which returned 0.593% WO3 over 3.17m (estimated to be true thickness) at a depth of 220.62m.
The continuity of the mineralized zones indicated by drilling and the sizeable footprint of the mineralization on surface over substantial distances suggests the potential for a large-scale tungsten resource located immediately above the MAX Mine. Additional diamond drilling to assess the potential of a tungsten resource, obtain metallurgical samples in addition to possible near-term development with an underground raise are currently being planned. Existing infrastructure at the MAX Mine is well suited to the potential development of a tungsten resource.
Selected drill hole intercepts are tabulated below;
MM-08-04 From (m) To (m) Width (m) W % WO3%
4.50 6.93 2.43 0.107 0.135
169.40 172.50 3.10 0.125 0.158
Including 171.22 172.50 1.28 0.211 0.267
186.00 188.60 2.60 0.231 0.291
Including 187.60 188.40 0.80 0.562 0.709
MM-08-05 From (m) To (m) Width (m) W % WO3%
4.10 12.22 8.12 0.121 0.153
64.28 67.03 2.75 0.317 0.399
208.05 216.76 8.71 0.403 0.508
Including 208.05 214.79 6.74 0.505 0.637
220.62 223.79 3.17 0.471 0.593
Including 221.54 223.79 2.25 0.646 0.815
315.42 316.28 0.86 0.429 0.541
MM-08-06 From (m) To (m) Width (m) W % WO3%
187.25 188.33 1.08 0.339 0.427
196.06 201.26 5.20 0.327 0.413
Including 196.40 201.26 4.86 0.348 0.439
MM-08-07 From (m) To (m) Width (m) W % WO3%
167.80 180.90 13.10 0.400 0.504
Including 168.14 178.53 10.39 0.478 0.603
185.41 188.96 3.55 0.330 0.416
Including 186.77 187.95 1.18 0.708 0.893
Sampling and logging of the drill holes was conducted under the supervision of David Melling, P.Geo., a qualified person as defined by NI43-101. The sampling program included quality control procedures, in addition to internal quality control at the assay laboratory, ACME Analytical of Vancouver, BC an ISO 9001:2000 accredited laboratory.
Scott Broughton, P.Eng. is the qualified person responsible for the preparation of this news release.
ROCA MINES INC.
"Scott Broughton"
Scott E. Broughton, P.Eng. -- President & CEO
For further information contact:
Doug Fosbrooke
Investor Relations
Tel: 604-684-2900
Fax: 604-684-2902
Email: [email protected]
Web: www.rocamines.com
The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.
Tungsten is an essential metal, noted for its hardness and high-melting point. It is used primarily in cemented carbide and high-speed steel tools for the construction and mining industries and for general wear protection of steel alloys. Tungsten currently trades in the US$14.00-15.00/lb. range. |
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