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News

 July 23, 2008
Trevali Continues to Intersect Broad Mineralized Intervals at Magistral South Zone on Santander Silver-Lead-Zinc Mine, Peru

 
Drilling highlights include:
54.5 metres at 4.79% zinc
34.6 metres at 5.19% zinc
30.6 metres at 6.09% zinc

TRC-NR-08-10

Vancouver, British Columbia... Trevali Resources Corp. ("Trevali" or the "Company") (CNQ: ZINC, Frankfurt: 4TI, Pink Sheets: TREVF) is pleased to announce that diamond drilling continues to intersect broad intervals of mineralization at the Magistral South zone on its advanced Santander silver-lead-zinc project located in the Cerro de Pasco region of west-central Peru.

A total of 90 diamond drill holes have been completed to date of which the Company has received assay results from the first 58 holes (Table 1 -- summaries of all the holes and location maps are available on the Company's website).

Site infrastructure at the formerly-producing operation includes a fully refurbished 200-man camp and associated support facilities, an ore processing / concentrator plant (including various crushers, mills and cell houses) able to produce zinc, lead-silver and copper concentrates that is currently undergoing a refurbishment program, and the Tingo hydroelectric power-station, located some 17-km down-valley to the west.

The current drill program at Santander represents the first modern exploration on the large, 4,455-hectare (44km2) property and is designed to test the three Magistral zones to approximately 200-metres vertical depth. The majority of the holes have intersected significant sulphide mineralization, which remains open at depth in all three bodies (see website for details). Property-scale structural reconstructions indicate the Magistral zones have quite significant additional depth potential -- conservatively interpreted to range from 300-to-500-metres vertical extent. Drilling remains in progress.

Magistral Norte, the most northerly of the Magistral bodies, lies only 1.5-km north of the Company's mineral processing plant.

Table 1: Summary assay results - Santander Project
Zone / Borehole
(dip / azimuth)
From – To Downhole
Interval*
Ag equivalent** Ag oz/t (g/t) Pb % Zn % Cu%
Magistral Norte
SAN-047
(-60 / N50E)
153 – 158m
 
191.25 – 192.65m
5m
 
1.4m
4.4oz (137.7g/t)
 
6oz (189.5g/t)
0.6oz (19.7g/t)
 
0.9oz (28.3g/t)
1.55%
 
2.66%
1.02%
 
1.19%
-
 
-
Magistral Sur
SAN-048
(-41 / 240)
151.2 – 205.7m
 
Inc 167.9 – 199.9m
54.5m
 
32m
-
 
-
0.6oz (19.4g/t)
 
0.9oz (28.3g/t)
0.25%
 
0.39%
4.79%
 
5.99%
-
 
-
Magistral Norte
SAN-049
(-50 / N60E)
128.65 – 131.45m 2.8m - - 0.83% 0.65% -
Magistral Sur
SAN-050
(-47 / 240)
175 – 231m
 
Inc 197.4 – 228m
56m
 
30.6m
-
 
-
0.3oz (11g/t)
 
0.3oz (11.3g/t)
0.17%
 
0.23%
3.55%
 
6.09%
-
 
-
Magistral Sur
SAN-051
(-41 / 240)
141.2 – 186.1m
 
Inc 142.1 – 171.15m
44.9m
 
29.05m
-
 
-
0.2oz (9g/t)
 
0.4oz (11.7g/t)
0.04%
 
0.06%
4.31%
 
6.22%
-
 
-
Magistral Sur
SAN-052
(-41 / 240)
54.1 – 59.5m
 
64.5 – 99.1m
 
Inc 78.5 – 90.5m
5.4m
 
34.6m
 
12m
-
 
-
 
-
2oz (64.3g/t)
 
6g/t
 
4.7g/t
0.51%
 
0.02%
 
0.01%
5.12%
 
5.19%
 
9.04%
-
 
-
 
-
Magistral Sur
SAN-053
(-47 / 240)
287.45 – 299.7m
 
312.3 – 313.55m
12.25m
 
1.25m
-

 
17.8oz (555.3g/t)

5g/t
 
3.8oz (118.8g/t)
0.14%
 
2.69%
3.26%
 
7.92%
-
 
-
Magistral Sur
SAN-054
(-50 / N60E)
99.25 – 106.9m 7.65m - 3.6g/t 0.09% 2.39% -
Magistral Sur
SAN-055
(-50/ N60E)
62.6 – 68.6m 6m - 5.5g/t 0.22% 2.54% -
Magistral Sur
SAN-056
(-50 / N60E)
64.4m – 79.5m 15.1m - 8.2g/t 0.05% 6.39% -
Magistral Sur
SAN-057 & 058
Failed to intercept significant mineralization: The Magistral Sur body in these section lines thins upwards, and the bore holes are the intersections closest to surface in their respective section line.  Thick zones of mineralization were intersected in their down dip extensions in holes SAN-048 & SAN-050 respectively.
*Exploration to date suggests mineralized zones or mantos are dipping west at approximately 70 degrees; however, it is anticipated that future mapping of an underground exploration adit will allow a more accurate estimation of true thickness.
**Silver equivalent calculated using following metal prices: Ag $15/oz, Pb $0.9/lb, Zn $0.9/lb, Cu $3/lb and assumes 100% recoveries.


Project Background

The Santander silver-lead-zinc mine project is located approximately 215 km by road from Lima, in the western extent of Peru's prolific Cerro de Pasco mineral district. The mine operated from 1958-1993 targeting a single Carbonate Replacement Deposit-type pipe and manto structure. Approximately 8 million tonnes grading +7% zinc, 1-4% lead and 60 grams/tonne silver plus by-product copper was processed - initially from open pit operations and then from underground mining reaching a depth of 500 metres below surface in mineralization grading about 11% zinc. Drilling by past operators indicates this mineralization remains open to depth - extending at least 200 metres further beneath the previous workings.

Recent exploration drilling by the Company has focused on three other similarly mineralized manto to pipe-type structures (Magistral North, Central and South) situated in favourable carbonate host rocks and located a couple of kilometres northwest - along the same structural trend hosting the Santander orebody.

Qualified Person and Quality Control/Quality Assurance

EurGeol Dr. Mark D. Cruise, Trevali's President and CEO and a qualified person as defined by National Instrument 43-101, has supervised the preparation of the scientific and technical information that forms the basis for this news release. Dr. Cruise is not independent of the Company, as he is an officer and shareholder.

The work programs at Trevali were designed by, and are supervised by, Mark D. Cruise, President & CEO, Trevali, and Les Oldham, General Manager, Consultora Minera Anglo Peruana S.A.(independent geological consultants), who together are responsible for all aspects of the work, including the quality control/quality assurance program. On-site personnel at the project rigorously collect and track samples which are then security sealed and shipped to ACME Laboratories, Vancouver, for assay. ACMEs quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025: 1999. Analytical accuracy and precision are monitored by the analysis of reagent blanks, reference material and replicate samples. Quality control is further assured by the use of international and in-house standards. Blind certified reference material is inserted at regular intervals into the sample sequence by Trevali personnel in order to independently assess analytical accuracy. Finally, representative blind duplicate samples are routinely forwarded to ACME and an ISO compliant third party laboratory for additional quality control.

About Trevali Resources Corp.

The Company is currently exploring and conducting various scoping level studies on the former Santander polymetallic mine Peru in order to ascertain as best as possible the cost and feasibility of re-commencing mining and milling operations in a timely manner should exploration prove to be successful.

The common shares of the Company are currently listed on the CNQ (symbol ZINC). For further details on the Company readers are referred to the Company's web site (www.trevaliresources.com) and to Canadian regulatory filings on SEDAR at www.sedar.com.

On Behalf of the Board of Directors of
TREVALI RESOURCES CORP.

"Mark D. Cruise" (signed)
Mark D Cruise, President

Contact Information:
Steve Stakiw, Manager - Corporate Communications
Email: sstakiw@trevaliresources.com
Phone: (604) 488-1661 / Fax: (604) 408-7499

The CNQ has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.


View News Release in PDF Format:
File: http://www.trevali.com/i/pdf/2008-07-23_NR.pdf
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