Trevali Resources Corp.
PINK SHEETS : TREVF
FRANKFURT : 4TI
CNSX : TV

Trevali Resources Corp.

April 12, 2010 09:01 ET

Trevali Drills Additional High-Grade Mineralization in Magistral North, Central and South Deposits

Completes resource expansion drill program - mineralization remains open in all three zones Highlights include: North - 5 metres at 529.2 g/t (15.4 oz/t) silver, 7.47% lead, 13.15% zinc & 0.12% copper Central - 1.9 metres at 268.4 g/t (7.8 oz/t) silver, 11.32 lead, 12.84% zinc & 0.98% copper

VANCOUVER, BRITISH COLUMBIA--(Marketwire - April 12, 2010) - Trevali Resources Corp. ("Trevali" or the "Company") (CNSX:TV)(PINK SHEETS:TREVF)(FRANKFURT:4TI) is pleased to announce the successful completion of its 2009-2010 resource expansion drill program on the Santander silver-lead-zinc mine project in west-central Peru. The 12,575-metre, 61-hole core drill program was very successful with essentially all definition holes intersecting sulphide mineralization. The final hole, SAN-165, was designed to test a deep extension of the Magistral North body and intersected semi-massive to massive sulphide mineralization as planned at approximately 400-metres downhole depth, approximately 80-metres vertically below the next nearest intercept. In addition to these exploration programs at Santander, Trevali along with partner Glencore International continue to fast-track the project towards production.

"These most recent assay results further demonstrate the strong technical fundamentals of the Santander project with high-grade silver-lead-zinc intercepts continuing to be returned from all three Magistral deposits," states Mark Cruise, Trevali's President and CEO. "All three Magistral deposits and the Puajanca zone remain open for expansion and the Company has yet to tackle the significant exploration upside on our large 44-km2 property package."

Key drilling highlights include:

- Drill hole SAN-149, collared on the northern margin of the Magistral North deposit, intersected a thick interval of very high grade silver mineralization - 8.1 metres at 344.7g/t (10 oz/t) silver, 5.38% lead and 9% zinc within which higher grade intervals occur. The hole was designed to test an area adjacent to an interpreted major approx. NE-SW trending feeder zone. This structure is traceable on surface approximately 1.1 km to the north-east where it also appears to control the Puajanca zone. As such it represents a significant high-grade silver structural target and will be aggressively pursued by future exploration programs.

- Magistral North drilling continues to deliver multiple, thick polymetallic intercepts in a zone previously considered to be composed of lower-grade mineralization; Drill hole SAN-144 returned 15 metres at 52.6 g/t (1.5 oz/t) silver, 4.47% lead and 4.37% zinc.

- Geotechnical and condemnation drilling in an area of potential ramp access between the Magistral North and Central deposits intersected numerous zones of sulphide mineralization. The broadly E-W to NE-SW trending 'feeder' zones comprise envelopes of up to +20 metres width containing lower grade mineralization within which narrow high grade structures and fracture zones occur. Drill holes SAN-142, 143 and 145 intersected zones of high-grade mineralization ranging from 1.5-to-1.9 metres width with grades ranging from 130.7 g/t (3.8 oz/t) to 268.4 g/t (7.8 oz/t) silver, 8.4% to 11.32% lead, 6.18% to 12.84% zinc and 0.24% to 0.98% copper. Mineralization remains open to the East and future exploration programs will further examine this potential.

- Magistral South returned multiple zones of zinc-rich mineralization in areas outside of the current resource estimate.

- Numerous other high priority targets and prospects remain to be drill tested: the Puajanca South prospect and the past-producing Santander Pipe both remain open at depth. In addition, several high-priority targets containing out-cropping mineralization and/or extensive alteration remain to be drill-tested - for example, the El Toro prospect where higher-level alteration, 'productive' gangue and trace base metal mineralization occur in a structurally controlled zone over 1-km long and 150-metre wide, a similar surface expression to the currently defined Magistral deposits.



Table 1: Summary assay results - Magistral Deposits

---------------------------------------------------------------------------
Zone/
Borehole
(dip/ From - To Downhole
azimuth) (metres) Interval Ag oz/t(g/t) Pb% Zn% Cu%
---------------------------------------------------------------------------
Magistral 296.65-314.65 18m 0.4oz/t(13.5g/t) 0.39% 3.51% -
South
SAN-133 Inc 298.65-302.2m 3.55m 0.6oz/t(20.7g/t) 0.43% 7.69% -
(-49.9
degrees/ Inc 309.1-314.65m 5.55m 0.4oz/t(14.5g/t) 0.16% 5.02% -
59
degrees)
---------------------------------------------------------------------------
Magistral 217.65-226.35m 8.7m 0.6oz/t(21.8g/t) 0.5% 5.8%
South
SAN-134
(-50.2
degrees/
80.2
degrees)
---------------------------------------------------------------------------
Magistral 44.35-45.35 1m 4.3oz/t(148.5g/t) 2.57% 10.81% 0.19%
Central
SAN-135
(-21.9
degrees/
56.5
degrees)
---------------------------------------------------------------------------
Magistral 73.9-100.25m 26.35m 0.4oz/t(15.6g/t) 1.04% 3.18% -
South
SAN-136 Inc 73.9-87.75m 13.85m 0.6oz/t(20.3g/t) 0.84% 4.34% -
(-64.4
degrees/ Inc 93.25-100.25m 7m 0.5oz/t(16.7g/t) 1.9% 3.01% -
62.6
degrees) 123.05-123.85m 0.8m 0.8oz/t(28.8g/t) 1.98% 3.14% -
---------------------------------------------------------------------------
Magistral 75-84.9m 9.9m 0.6oz/t(21.8g/t) 0.19% 5.88% -
South
SAN-137 Inc 75-82.6m 7.6m 0.8oz/t(26.7g/t) 0.23% 7.04% -
(-59.7
degrees/
33.2
degrees)
---------------------------------------------------------------------------
Magistral 306.9-315.25m 8.35m 2.5oz/t(84.6g/t) 0.68% 1.19% -
North
SAN-138 Inc 306.9-309.25m 2.35m 4oz/t(138g/t) 0.54% 1.34%
(-52.6
degrees/ Inc 311.2-312.9m 1.7m 4.8oz/t(166.2g/t) 0.74% 2.76% -
61.4
degrees) 373.75-377.75m 4.1m 1.5oz/t(52.9g/t) 1.76% 2% -

Inc 376.8-377.75m 0.95m 4.9oz/t(167.3g/t) 6.63% 7.19% 0.12%
---------------------------------------------------------------------------
Magistral 117.8-127.3m 9.5m - 0.45% 2.2% -
South
SAN-139 Inc 126.5-127.3m 0.8m - 0.48% 13.89% -
(-82.4
degrees/
63.5
degrees)
---------------------------------------------------------------------------
Magistral 34.7-62m 24.6m 1.2oz/t(40.8g/t) 1.13% 2.18% -
Central
SAN-140 Inc 43.3-53.5m 10.2m 2oz/t(67.4g/t) 1.13% 4.29% 0.11%
(-23.2/
57.6 Inc 49.7-52.5m 2.8m 4.3oz/t(147.7g/t) 2.93% 7.97% 0.26%
degrees)
---------------------------------------------------------------------------
Condem- Geotechnical and condemnation hole between Magistral North and
nation Central Zones
SAN-141
(-59.7/
60.9
degrees)
---------------------------------------------------------------------------
Magistral 72.55-78.2m 5.65m 2.6oz/t (90.9g/t) 0.64% 0.63% -
North-
Central 100.7-103.2m 2.5m 0.9oz/t(32.8g/t) 1.9% 1.71% -
Condem-
nation 106.75-113m 6.25m 0.7oz/t(26g/t) 1.23% 1.27% -
SAN-142
(-32.9/ 119.8-125.35m 4.05m 1.4oz/t(49.8g/t) 2.48% 3.51% 0.1%
36.7
degrees) 138.8-150.25m 11.45m 1.2oz/t(42.9g/t) 1.74% 2.28% -

Inc 148.65-150.25m 1.6m 6.2oz/t(212.5g/t) 9.08% 12.17% 0.39%
---------------------------------------------------------------------------
Magistral 110.45-137.3m 26.85m 1oz/t(36.8g/t) 1.47% 1.63% 0.11%
North-
Central Inc 124.4-137.3m 12.9m 1.9oz/t(66.6g/t) 2.6% 2.98% 0.18%
Condem-
nation Inc 124.4-127.35m 2.95m 3oz/t(105.8g/t) 3.24% 3.65% 0.08%
SAN-143
(-44.4/ Inc 130.35-137.3m 6.95m 2.3oz/t(78.6g/t) 3.45% 3.97% 0.3%
60.7
degrees) Inc 135.4-137.3m 1.9m 7.8oz/t(268.4g/t) 11.32% 12.84% 0.98%
---------------------------------------------------------------------------
Magistral 211.4-229.55m 18.15m 1.3oz/t(45.2g/t) 3.76% 3.85% 0.07%
North
SAN-144 Inc 211.4-226.4m 15m 1.5oz/t(52.6g/t) 4.37% 4.47% 0.07%
(-73.1/
64.6 Inc 211.4-215.55m 4.15m 2.5oz/t(87.6g/t) 7.14% 7.4% 0.1%
degrees)
Inc 220.75-223.9m 3.15m 2.1oz/t(73.8g/t) 6.55% 6.18% 0.09%
---------------------------------------------------------------------------
Magistral 81.3-82.3m 1.5m 3.8oz/t(130.7 g/t) 8.4% 7.54% 0.24%
Central
SAN-145 123.65-124.1m 0.45m 4.5oz/t(154.4g/t) 1.77% 6.2% 0.15%
(-46.5/
38.2
degrees)
---------------------------------------------------------------------------
Condem- Geotechnical and condemnation holes - no significant
nation intersections
SAN-146
- 148
---------------------------------------------------------------------------
Magistral 190-198.1m 8.1m 10oz/t(344.7g/t) 5.38% 9.02% 0.09%
North
SAN-149 Inc 190-195m 5m 15.4oz/t(529.2g/t) 7.47% 13.15% 0.12%
(-69.8/
59.7
degrees)
---------------------------------------------------------------------------


An updated, independent NI 43-101 resource estimate will be prepared upon receipt of the final assays from this drill program.

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 world-class Central Polymetallic Belt. Site infrastructure includes a fully refurbished 200-man camp and the Tingo hydroelectric power-station located 17 km down-valley to the west. The Company commenced exploration at Santander in November 2007 discovering four new high-grade silver-lead-zinc replacement and massive sulphide bodies to date. Mineralization remains open in all three Magistral deposits, the Puajanca zone and the past-producing Santander Pipe, and numerous high-priority targets remain to be tested on the Company's large, 100%-owned land package.

To view Figure 1. Magistral drillhole locations, please click on the following link: http://media3.marketwire.com/docs/tvmap412.pdf.

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 Santander were designed by, and are supervised by, Dr. Mark D. Cruise, President & CEO of Trevali, and Tim Kingsley (geological consultant), 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. ACME's 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 in conjunction with partner Glencore International A.G. has entered into a definitive development agreement for the Santander project that will see Glencore provide and operate a 2,000-tonne-per-day concentrate plant, undertake mining operations on a 'contractor/toll basis' and enter into a long-term concentrate offtake agreement for 100% of Santander project production at benchmark terms.

Additionally, through its wholly owned subsidiary Trevali Renewable Energy Inc., the Company is undertaking a significant upgrade of the Tingo run-of-river hydroelectric generating facility along with transmission line upgrades and extensions to allow the potential sale of surplus power into the Peruvian National Energy Grid.

The common shares of the Company are currently listed on the CNSX (symbol TV). For further details on the Company, readers are referred to the Company's web site (www.trevali.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, President

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

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