Trevali Mining (TV-T) Sept 21, '16 announces results from twelve new drill holes of the ongoing 2016 underground exploration drill program at its Santander Zinc Mine in Peru. The aim of this current phase of drilling is to further extend the down-depth expression of the Magistral Central deposit and associated Fatima vein zones, in addition to test for the potential presence of hanging-wall hosted "Oyon" mineralization similar to that discovered at Magistral North early this year (see TV-NR-16-09 for details). The program has been hugely successful on all counts with the drill holes intersecting and extending both the Magistral Central and Fatima zones in addition to discovering new massive sulphide replacement mineralization in the hanging-wall to the Magistral Central deposit.
In excess of 90% of the holes returned zinc grades, over mineable intervals, materially higher than those in current mining operations where run-of-mine head grades typically range from approximately 4-4.5% Zn (Table 1). All mineralization remains open for expansion and further underground drilling is in progress (Figure 1 & 2).
"These latest results from our successful ongoing 2016 exploration drill program remain highly encouraging and continue to add very tangible, near-term value to the Santander Zinc Mine where our experienced operations team has a proven track record of translating exploration successes into mill feed in a timely manner," stated Dr. Mark Cruise, President and CEO of Trevali.
To view Figure 1: Cross section looking west showing Magistral Deposits with drill hole intercepts, please visit http://media3.marketwire.com/docs/1070095fig1.jpg.
| | | | | | | | | | | | | Borehole (dip/azimuth) | | From - To (metres) | | Zone / Core Length Interval* (metres) | | Zn (%) | | Pb (%) | | Ag oz/ton (g/tonne) | | MC-160-16 | | 91.15 - 115.40 | | FA / 24.25 | | 5.57 | | 0.85 | | 2.86 (97.9) | | | 218.15 - 234.70 | | MC / 16.55 | | 13.84 | | 4.62 | | 3.25 (111.4) | | | incl. 218.15 - 229.15 | | 11.00 | | 16.30 | | 6.67 | | 4.37 (149.9) | | MC-161-16 | | 268.45 - 289.75 | | MC / 21.3 | | 5.42 | | 0.14 | | 0.31 (10.6) | | MC-162-16 | | 305.05 - 315.65 | | MC / 10.6 | | 3.90 | | 0.02 | | 0.13 (4.4) | | | incl. 305.05 - 309.05 | | 4.00 | | 9.54 | | 0.03 | | 0.06 (2.2) | | MC-163-16 | | 154.95 - 161.20 | | FA / 6.25 | | 6.80 | | 0.63 | | 2.61 (89.6) | | | 256.75 - 260.00 | | M1 / 3.25 | | 9.07 | | 0.01 | | 0.07 (2.02) | | | 265.60 - 268.50 | | M2/ 2.9 | | 12.81 | | 0.01 | | 0.06 (2.2) | | | 270.65 - 284.60 | | MC / 13.95 | | 5.96 | | 1.29 | | 1.70 (58.2) | | | incl. 270.65 - 276.50 | | 5.85 | | 5.20 | | 2.46 | | 2.40 (82.4) | | MC-164-16 | | 288.80 - 301.65 | | MC / 12.85 | | 7.33 | | 0.12 | | 0.38 (13.1) | | | 312.65 - 320.95 | | OYO / 8.30 | | 1.80 | | 0.06 | | 0.44 (14.9) | | MC-165-16 | | 112.80-119.50 | | FA / 6.70 | | 9.32 | | 0.06 | | 0.17 (5.9) | | | 127.40-147.40 | | FA / 20.00 | | 4.26 | | 0.07 | | 0.24 (8.4) | | | 150.80-158.90 | | MC / 8.10 | | 5.45 | | 0.07 | | 0.54 (18.4) | | MC-166-16 | | 140.90 - 149.60 | | MC / 8.70 | | 7.39 | | 0.29 | | 0.22 (7.5) | | MC-167-16 | | 187.20 - 199.50 | | 11.10 | | 4.74 | | 0.29 | | 0.97 (33.3) | | | incl. 187.20 - 192.45 | | MC / 4.05 | | 6.26 | | 0.27 | | 0.85 (29.2) | | | incl. 195.50 - 199.50 | | OYO / 4.00 | | 6.11 | | 0.43 | | 1.55 (53.2) | | MC-168-16 | | 260.90- 287.10 | | 26.20 | | 7.50 | | 0.39 | | 1.44 (49.5) | | | incl. 260.90 - 276.85 | | MC / 15.95 | | 10.18 | | 0.49 | | 1.97 (67.5) | | | incl. 282.20 - 287.10 | | OYO / 4.90 | | 3.52 | | 0.21 | | 0.59 (20.2) | | MC-170-16 | | 200.80 - 226.10 | | 25.30 | | 5.13 | | 1.37 | | 2.63 (90.2) | | | incl. 200.80 - 203.90 | | MC / 3.10 | | 16.86 | | 2.49 | | 6.03 (206.9) | | | incl. 206.30 - 217.65 | | OYO / 11.35 | | 4.40 | | 1.65 | | 2.68 (91.8) | | | incl. 224.30 - 226.10 | | OYO / 1.8 | | 3.73 | | 2.33 | | 3.95 (135.4) | | MC-171-16 | | 137.40 - 139.50 | | MC / 2.10 | | 12.23 | | 9.57 | | 11.69 (400.8) | | MC-172-16 | | 195.60 - 202.50 | | 6.90 | | 4.09 | | 1.48 | | 2.57 (88.1) | | | incl. 195.60 - 196.80 | | MC / 1.20 | | 8.36 | | 5.36 | | 7.30 (250.5) | | | incl. 196.80 - 202.50 | | OYO / 5.70 | | 3.01 | | 0.49 | | 1.36 (46.7) |
| Table 1: Summary of latest Santander Mine underground drill assay results | | *True widths of the mineralized intervals are estimated at 60-80% of core length | | MC-Magistral Central, FA-Fatima, OYO-Oyon, M1/M2-new undefined mantos |
MAGISTRAL CENTRAL AND CENTRAL-OYON ZONES
In detail, underground exploration drilling intersected multiple stacked lenses of high-grade mineralization and has extended the sulphide shell in a previously untested area towards the Magistral North zone around and below the 4300-metre elevation level.
These holes define an area of approximately 120-metres in length by at least 200-metres vertical between the Magistral North and Central deposits that was untested and outside the current resource estimate (Figures 1 and 2). Several of the drill holes intercepted (e.g. MC-160, MC-163, MC-168 and MC-171) exceptionally high grade zinc-silver-lead mineralization. The mineral assemblages (silver-rich sulphosalts) and geochemistry observed in these drill holes is indicative of distal to source setting and assumes the presence of a large hydrothermal system with very significant depth and lateral potential remaining for drill testing. This observation is supported by the presence of large EM conductor at depth (Figure 1).
Early this year the Santander exploration team discovered a new mineralized zone (veining and replacement) termed the "Oyon Mantos" in the hanging wall to the main Magistral North deposit (see TV-NR-16-09 for details). Geological modelling and follow up targeting suggested that similar style mineralization should also exist in the hanging wall of the Magistral Central deposit - a hypothesis proven by recently completed hole MC-170 that intersected a 3.1-metre wide zone of exceptionally high-grade replacement mineralization at the main MC deposit returning 16.9% Zn, 2.5% Pb and 6.0 oz/ton Ag followed by 11 metres of Oyon manto mineralization (4.4% Zn, 1.6% Pb and 2.7 oz/ton Ag) located in the hanging wall (Table 1). The area has very limited drill coverage and additional follow up drilling is planned in order to expand and better define the mineralization in the area (Figure 2).
The Company is currently fast-tracking ramp development in order to enable exploitation of this high-grade area at the earliest opportunity in addition to providing additional exploration windows to extend both zones.
Magistral Central, the Fatima Zone and the emergent Oyon Mantos zone all remain open and expansion/definition drilling is ongoing.
To view Figure 2: Cross section view looking east-southeast and illustrating geometry of the Oyon mineralization and location of recent drillhole intercepts in the Magistral Central Deposit at the Santander Zinc Mine, please visit http://media3.marketwire.com/docs/1070095fig2.jpg.
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. Drill core 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 two commercially producing operations.
The Company is actively producing zinc and lead-silver concentrates from its 2,000-tonne-per-day Santander mine in Peru and its 3,000-tonne-per-day Caribou mine in the Bathurst Mining Camp of northern New Brunswick. Trevali also owns the Halfmile and Stratmat base metal deposits, located in New Brunswick, that are currently undergoing a Preliminary Economic Assessment reviewing their potential development.
The common shares of Trevali are listed on the TSX (symbol TV), the OTCQX (symbol TREVF), the Lima Stock Exchange (symbol TV), and the Frankfurt Exchange (symbol 4TI). For further details on Trevali, readers are referred to the Company's website ( www.trevali.com) and to Canadian regulatory filings on SEDAR at www.sedar.com.
On Behalf of the Board of Directors of TREVALI MINING CORPORATION,
Mark D. Cruise, President
Trevali Mining Corporation
Steve Stakiw
Vice President, Investor Relations and
Corporate Communications
(604) 488-1661 / Direct: (604) 638-5623
sstakiw@trevali.com |
