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Trevali produces marketable high-grade silver-lead-zinc concentrates from Santander mine project in Peru

January 7, 2009

56.3 ounce silver (1750 g/t), 80.8% lead and 53.4% zinc


Vancouver, British Columbia... Trevali Resources Corp. ("Trevali" or the "Company") (CNSX: TV, Frankfurt: 4TI, Pink Sheets: TREVF) is pleased to announce that ongoing independent metallurgical testing of its high-grade Magistral Norte zone on the Santander mine project, Peru has successfully produced marketable high-grade silver-lead and zinc concentrates.

These very positive concentrate results build and vastly improve upon previously announced high recoveries of 84.5% silver, 95% lead and 91% zinc to produce a 40 oz/t (1,250 g/t) silver and 42.6% lead concentrate (see TRC-NR-08-15 for details). The work, conducted by Resource Development Inc. of Denver, Colorado, was designed to establish the anticipated flotation results for rougher concentrate flotation and open-circuit concentrate cleaner tests. Results clearly demonstrate that marketable-grade silver-lead and zinc concentrates can be readily produced in two stages of cleaner circuit with or without regrind. The concentrate results are critical to the project as high recovery of metal from the ore -- to produce high-grade marketable concentrates -- has an extremely positive effect on anticipated project economics.

Concentrate Test Results

Trevali provided a representative composite 'run-of-mine' sample from the Magistral Norte Zone that assayed 4.4 oz (137 g/t) silver, 4.23% lead, 6.07% zinc and 0.14% copper. This sample was initially subjected to grinding and flotation test-work.

The grinding test determined future crushing and grinding requirements with the results indicating an 'average' ore-hardness typical of the deposit type -- resulting in conventional milling requirements for the current on-site milling circuit (see TRC-NR-08-15 for details). Following crushing and grinding the ore is mixed with various reagents in order to liberate or 'float' off the various payable metals.

The flotation tests simulate liberation of the silver-lead-zinc mineralization from the crushed ore -- determining the percentage recovery of each metal to the respective concentrate. Additional flotation test work was conducted at differing primary grinds in order to examine the differential flotation of the lead-silver and zinc.

The latest results demonstrate excellent separation and recoveries of both the silver-lead and zinc mineralization at a primary grinds of 150 and 200 mesh respectively (with a P80 factor -- eighty percent passing size) following only 7 minutes flotation time (Table 1). This produces silver-lead and zinc rougher concentrates for additional cleaning to produce final marketable concentrates. The results clearly demonstrate that both silver-lead and zinc rougher concentrates can produce saleable concentrates without additional regrinding, however a minimal 5-minute concentrate regrind results in additional 'final' concentrate improvements (Table 1).

Table 1: Magistral Norte Concentrate test results




Ag oz (g/t)

Pb %

Zn %

Ag %

Pb %

Zn %

Magistral Norte ‘Run-Of-Mine’ Composite Sample

4.4 (137)






Lead Float P80 – 150#

36.3 (1130)






Zinc Float P80 – 200#

1.5 (47.2)






Lead Cleaner – No Regrind

53.2 (1655)






Lead Cleaner – Regrind

56.3 (1750)






Zinc Cleaner – No Regrind

2 (64)






Zinc Cleaner - Regrind

2.1 (66)






Future test-work at Trevali's on-site metallurgical laboratory will seek to refine and potentially further improve upon the above results. Additional test-work will include lock-cycle tests, initial metallurgical test-work on the Magistral Central and Sur orebodies and more detailed 'orebody depth versus metallurgy' test work.

Closure of Private Placement

The Company also announces that, on December 29, 2008, it completed a non-brokered private placement consisting of 667,518 units at $0.75 per Unit for gross proceeds of $500,638.50. Each Unit is comprised of one common share and one-half a share purchase warrant. Each whole warrant is exercisable at a price of $1.20 per common share for a period of two years from the closing date of the financing.

The warrants carry a forced conversion feature such that should the common shares of Trevali trade at or above $2.20 per share for 20 consecutive trading days, that Company may (within 30 days of such occurrence) notify warrant holders in writing that the warrants must be exercised within 30 calendar days of the notice -- subsequent to which any unexercised warrants will expire.

The proceeds of the financing will be utilized to advance refurbishment of the mineral processing plant at the Company's Santander silver-lead-zinc mine development project in Peru.

Project Background

The Company commenced exploration at Santander in November 2007 -- and to date has completed 100 diamond drill-holes, discovering three new high-grade silver-lead-zinc replacement and massive sulphide bodies. Most recently, deep drilling has intersected the continuation of all three Magistral bodies to 350-metres vertical depth with mineralization remaining open. Elsewhere, out-cropping high-grade silver mineralization with values up to 17.9 oz (558 g/t silver) at Puajanca is a high--priority drill target.

Substantial 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, flotation cells and filters) 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 Santander project and the considerable existing infrastructure form a highly strategic asset in this mining district.


The Company further announces that, pursuant to its 2007 Incentive Stock Option Plan, it has granted incentive stock options to certain directors, officers and consultants allowing them to purchase up to an aggregate of 355,000 common shares in the capital stock of the Company. The options are exercisable at a price of CAD $0.72 for a period of two years ending January 7, 2011.

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 metallurgical work programs at Santander were designed by, and are supervised by Holland and Holland Consultants, U.K. who are responsible for all aspects of the work, including the quality control/quality assurance program. On-site personnel at the project rigorously collected and tracked the Magistral Norte composite sample which was security sealed and shipped to Resource Development Inc's Metallurgical Laboratory, Denver for test work. Resultant concentrates were security sealed and shipped to ALS Chemex Laboratories, Vancouver, for assay. ALS - Chemex'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 Trevali's Senior Geochemist via 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 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 in Peru to ascertain as best as possible the feasibility of re-commencing mining and milling operations in a timely manner upon successful exploration and engineering studies.

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 ( and to Canadian regulatory filings on SEDAR at

On Behalf of the Board of Directors of

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

Contact Information:
Steve Stakiw, Manager - Corporate Communications

Phone: (604) 488-1661 / Fax: (604) 408-7499

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

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