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VANCOUVER, BRITISH COLUMBIA--(Marketwire - May 31, 2010) - Trevali Resources Corp. ("Trevali" or the "Company") (CNSX:TV)(PINK SHEETS:TREVF)(FRANKFURT:4TI) is pleased to announce receipt of final geochemical assay results from its 2009-2010 resource expansion, definition and geotechnical drilling program on its Santander silver-lead-zinc mine development project in west-central Peru. The 2009-2010 program was highly successful and exceeded the Company's technical expectations with all three Magistral deposits, the Puajanca South zone and the Santander Pipe remaining open for future expansion. The Company's proven exploration team has commenced screening and advancing several high priority geological – structural – geophysical – geochemical anomalies (of similar tenor to known mineralization) to the drill testing stage.

"By any metric the current drill program has been incredibly successful. Our technical team has unequivocally demonstrated with the drill-rig a fundamental understanding of the controls on mineralization at Santander, which sits within the world's pre-eminent polymetallic mineral belt," stated Dr. Mark Cruise, Trevali's President and CEO. "I am confident that we will continue to expand our resource base through new discoveries on our large land-package going forward. Finally, our engineering and permitting teams continue to advance the project on all fronts towards anticipated production."

Key highlights of the approximately 12,500-metre, 61-hole diamond drill hole program include:

• Intersection of thick, high grade mineralization at mid-to-lower deposit levels
  • Magistral North – SAN-109A 31.75m at 3.4oz/t Ag, 4.86% Pb & 9.96% Zn
  • Magistral Central – SAN-123 41.25m at 2oz/t Ag, 0.8% Pb, 8.2% Zn & 0.11% Cu

• Intersection of significant mineralization beyond the current resource model at depth and along strike
  • Magistral South – SAN-124 10.85m at 10% Zn

• Discovery new zones of mineralization, in particular high-grade broadly E-W trending foot-wall zones
  • Magistral North SAN-158: 6.75m at 2.9oz/t Ag, 7.22% Pb, 6.83% Zn & 0.18% Cu
  • Magistral Central SAN-126: 6.75m at 2.9oz/t Ag, 4.12% Pb, 3.76% Zn & 0.1% Cu

• Intersection of significant mineralization between the Magistral North and Central deposits – SAN-142: 1.6m at 6.2oz/t Ag, 9.08% Pb, 12.17% Zn & 0.39% Cu; SAN-143: 1.9m at 7.8oz/t Ag, 11.32% Pb, 12.84% Zn & 0.98% Cu

• Mineralization has been extended to approximately 350-to-400 metres vertically on all three Magistral deposits and remains open. The deepest intersections to date are as follows:
  • Magistral North – SAN-096: 6.3m at 1.8oz/t Ag, 4.74% Pb & 4.18% Zn
  • Magistral Central – SAN-165: 20.45m at 0.02% Pb, 7.73% Zn, & 0.12% Cu
  • Magistral South – SAN-159: 4.4m at 0.9oz/t Ag, 0.55% Pb & 8.42% Zn

• Intersection of significant mineralization on the Puajanca South zone with the latest hole, SAN-155 returning 4.3m at 1.8oz/t Ag, 2.91% Pb and 5.24% Zn. The Puajanca North prospect located some 450 metres to the north has returned surface values averaging 6.4oz/t Ag, 15.59% Pb and 7.18% Zn and is interpreted to represent high-level 'leakage' from an underlying polymetallic target.

• Mineral system and empirical analysis suggests that all mineralized bodies have significant additional depth potential – conservatively modelled to range from 300-to-500 additional vertical metres.

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.

Table 1:Summary assay results

Contributing Sources

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