VANCOUVER, BRITISH COLUMBIA--(Marketwired - June 4, 2014) - Trevali Mining Corporation("Trevali" or the "Company") (TSX:TV)(LMA:TV)(OTCQX:TREVF)(FRANKFURT:4TI) announces that two new zones of high-grade polymetallic mineralization have been discovered adjacent to the Magistral Central deposit at its Santander Mine in Peru. The new zones, Fatima Northand Fatima South, occur in the footwall of (or behind) the principal Magistral Central deposit and remain open for expansion to the East and at depth.
The Fatima Zones trend sub-perpendicular (approx. 80-85 degrees ) to the main Magistral Central deposit, and similar to the Rosa Zone are thought to represent a later phase of high-grade replacement mineralization along a set of roughly East-West trending feeder structures/veins (Figures 1 & 2).
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Figure 1: 3D View showing Fatima Zones, adjacent to Magistral Central Deposit, with channel samples (CH) location; MC level 4440-3
Underground channel sampling results across the zones are illustrated and tabulated below (Figure 2 & Table 1).
To view the second figure associated with this press release, please visit the following link:https://media3.marketwire.com/docs/trevf06032.pdf
Figure 2: Underground Plan View showing Fatima Zone with channel samples assays.
Located in the footwall and within / subjacent to the existing underground development, the Fatima zone is readily accessible for incorporation into the Santander mine plan. The Company has mobilized an underground drill rig to site and it is about to commence a 4-5,000 metre drill campaign to further explore and define the newly discovered Fatima and Rosa zones (Figure 3). In addition the drilling will provide deeper, in-fill definition information on the deposits in order to facilitate long range mine-planning.
---------------------------------------------------------------------------- Channel CH-1311 Fatima North ---------------------------------------------------------------------------- Width (m) Zn (%) Pb (%) Ag (oz/ton) ---------------------------------------------------------------------------- 1.37 12.76 0.76 2.17 ---------------------------------------------------------------------------- 1.51 15.66 0.70 0.96 ---------------------------------------------------------------------------- 0.98 15.45 1.49 5.99 ---------------------------------------------------------------------------- 1.09 13.82 0.24 1.75 ---------------------------------------------------------------------------- 0.54 4.50 1.47 4.57 ---------------------------------------------------------------------------- 1.20 10.75 0.30 1.56 ---------------------------------------------------------------------------- Total channel width and average grade ---------------------------------------------------------------------------- 6.69 m 12.95% Zn 0.74% Pb 2.47 oz/ton Ag ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- Channel CH-1310 Fatima North ---------------------------------------------------------------------------- Width (m) Zn (%) Pb (%) Ag (oz/ton) ---------------------------------------------------------------------------- 0.97 9.65 0.81 2.23 ---------------------------------------------------------------------------- 0.84 9.44 0.63 3.21 ---------------------------------------------------------------------------- 1.41 14.60 0.49 3.04 ---------------------------------------------------------------------------- Total channel width and average grade ---------------------------------------------------------------------------- 3.22 m 11.76% Zn 0.62% Pb 2.84 oz/ton Ag ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- Channel CH-1251 Fatima South ---------------------------------------------------------------------------- Width (m) Zn (%) Pb (%) Ag (oz/ton) ---------------------------------------------------------------------------- 1.09 5.59 3.45 3.97 ---------------------------------------------------------------------------- 1.38 11.03 2.46 8.41 ---------------------------------------------------------------------------- 0.85 7.78 3.24 6.44 ---------------------------------------------------------------------------- 1.15 4.68 2.46 5.85 ---------------------------------------------------------------------------- Total channel width and average grade ---------------------------------------------------------------------------- 4.47m 7.45% Zn 2.85% Pb 6.30 oz/ton Ag ----------------------------------------------------------------------------
Table 1: Summary of Rock Channel Sample Assay Results
Note: Channel samples are cut perpendicular to the strike of mineralized zone and therefore reported intervals represent the true width of base metal mineralization exposed in the drift.
To view the third figure associated with this press release, please visit the following link:https://media3.marketwire.com/docs/trevf06033.pdf
Figure 3: 3D view showing Magistral North (MN), Magistral Central (MC), Magistral South (MS) deposits, Rosa and Fatima zones (illustrative only) at the Santander Mine in Peru.
EXPLORATION MODEL
The successful discovery of the Rosa and Fatima zones coupled with their interpretation to represent a later phase of high-grade feeder mineralization is indicative of a large-to-very-large, long-lived Carbonate Replacement Deposit ("CRD") system at Santander.
Of note is the fact that the Rosa and Fatima zones trend towards the Company's Puajanca South deposit and Puajanca North prospect where sampling has returned bonanza grade silver mineralization of up to 1.2 metres wide grading 39.9 oz/ton (1,369 g/t) Ag, 83% Pb and 18.4% Zn within an aggregate of 1.45 km of North East to East-West trending veining that averages 1 metre wide and returned 5.3 oz/ton silver (182.7 g/t), 14.3% lead and 2.0% zinc (Figure 4). Metal ratios (lead values significantly higher than zinc), mineral system analysis and alteration assemblages in the area are interpreted to indicate that structures in the Puajanca zone are located in the uppermost portions of a 'fertile' and well preserved polymetallic mineralizing system (see January 5, 2011 news release TRC-NR11-01 for details).
All mineralization to date is spatially associated with a significant geophysical anomaly interpreted to represent a large magmatic system which drives the high-level CRD mineralization discovered to date on the property (Figure 4). These most recent discoveries of Rosa and Fatima further highlight the overall exploration potential of the Santander property and of the Magistral - Puajanca corridor in particular (Figure 4).
To view the fourth figure associated with this press release, please visit the following link:https://media3.marketwire.com/docs/trevf06034.pdf
Figure 4. Analytical Signal Map with fault traces and location of the Magistral deposits and Puajanca Zone (1:10,000 scale)
Qualified Person and Quality Control/Quality Assurance
EurGeol Dr. Mark D. Cruise, Trevali's President and CEO and Daniel Marinov, P.Geo, Trevali's VP Exploration, are qualified persons as defined by NI 43-101, have supervised the preparation of the scientific and technical information that forms the basis for this news release. Mr. Marinov is responsible for all aspects of the work, including the quality control/quality assurance programs. Dr. Cruise is not independent of the Company, as he is an officer, director and shareholder. Mr. Marinov is not independent of the Company as he is an officer and shareholder. Channel samples were processed and assayed in the Santander mine onsite laboratory. Zinc, lead and silver, assays were obtained by Aqua-Regia dissolution followed by Atomic Absorption measurement. Values of lead and zinc over 15% are assayed by volumetric method. 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. The onsite laboratory is outsourced and managed by SGS-Peru personnel. SGS-Peru's quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025: 1999. Finally, representative blind duplicate samples are routinely forwarded to an ISO compliant third party laboratory for external quality control.
ABOUT TREVALI MINING CORPORATION
Trevali is a zinc-focused base metals mining company with operations in Peru and Canada.
In Peru, the Company is actively operating its wholly-owned Santander underground zinc-lead-silver mine and 2,000-tonne-per-day metallurgical plant, and producing zinc and lead-silver concentrates.
In Canada, Trevali owns the Caribou mine and mill, Halfmile mine and Stratmat polymetallic deposit all located in the Bathurst Mining Camp of northern New Brunswick. Initial trial production from the Halfmile underground mine was successfully undertaken in 2012 and the Company anticipates commencing operations at its 3,000-tonne-per-day Caribou Mill Complex in 2015.
All of the Company's deposits remain open for expansion.
The common shares of Trevali are listed on the TSX (symbol TV), the OTCQX (symbol TREVF) and on the Lima Stock Exchange (symbol TV). For further details on Trevali, readers are referred to the Company's web site (www.trevali.com) and to Canadian regulatory filings on SEDAR at www.sedar.com.