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Trevali Mining Expands Drill Program at Santander Zinc Mine in Peru

Trevali Mining Corporation ("Trevali" or the "Company") (TSX:TV)(LMA:TV)(OTCQX:TREVF)(FRANKFURT:4TI) announces results from eight new drill holes that are part of the ongoing 2016 underground resource definition and expansion drill program at its Santander zinc mine in Peru. The aim of the current phase of drilling is to extend and define the newly discovered zone of high-grade massive sulphide replacement mineralization between Magistral Central (MC) and Magistral North (MN), in addition to test the down-dip expression of the recently discovered Oyon zone.

Drill hole MC-182-16 targeted the down-dip expression of the Oyon zone in the 4150-level area, approximately 200-220 metres below the current active mining zone. The drill hole successfully intercepted multiple stacked lenses (or mantos) of massive sulphides in the main MC and Oyon zone (Table 1) and mineralization remains open for expansion (Fig. 1).

The reminder of reported drill holes targeted newly discovered mineralization (New zone) between MC and MN in the 4370-level area that is adjacent (approx. 90-metres horizontally) to the current mining front (see Oct. 31/16 News Release for details). All drill holes intersected narrow but exceptionally high-grade Pb-Ag-Zn replacement mineralization and the zone remains open for expansion (Table 1 and Figure 1).

Borehole From - To
Zone / Core
MC-182-16 347.70 - 350.90 MC / 3.20 7.51 1.13 0.96 (32.74)
360.60 - 363.35 OYO / 2.75 3.74 0.02 0.05 (1.80)
370.15 - 375.65 OYO / 5.50 6.60 0.72 0.97 (33.37)
388.95 - 389.95 OYO / 1.00 8.69 0.32 1.40 (47.90)
MC-183-16 85.90 - 86.75 MC / 0.85 4.21 2.17 4.11 (140.47)
MC-184-16 72.55 - 74.00 1.45 9.21 1.24 4.78 (129.39)
102.30 - 103.30 MC / 1.00 7.15 4.59 12.51 (427.98)
113.95 - 114.95 OYO / 1.00 5.00 5.43 2.29 (78.38)
MC-185-16 76.35 - 78.20 MC / 1.85 9.08 0.11 0.50 (17.11)
MC-186-16 202.30 - 205.65 MC / 3.35 12.44 1.16 1.78 (61.07)
MN-187-16 147.40 - 150.80 MN / 3.40 11.46 9.91 14.81 (506.60)
MN-188-16 176.65 - 179.20 MN / 2.55 9.93 10.67 5.67 (194.06)
MN-189-16 154.00 - 155.40 MN / 1.40 17.29 7.38 4.18 (143.07)

Table 1: Summary of MC-182-189 drill hole assay results.
*True widths of the mineralized intervals are estimated between 75-100% of core length.

To view Figure 1, please visit the following link:

"These latest results of the 2016 exploration program continues to maintain our Santander team's 100%-discovery track-record since the Company's initial exploration on the property in early 2008," stated Dr. Mark Cruise, Trevali's President and CEO. "Our 2016 exploration program has been particularly successful in so far as it has unequivally demonstrated that the Magistral zones have now merged at depth, forming what is essentially a plus-600-metre long zone of semi-contigous, massive sulphide mineralization comprised of multiple stacked replacement horizons and host units. This coupled with increasing zinc grades, typically only seen in the larger end members of the deposit class, sets a very solid foundation for future resource expansion programs particually given constructive macro-zinc fundamentals."

Trevali to be added to S&P/TSX Global Mining Index and S&P/TSX Global Base Metals Index

Effective after the close of trading on Friday, December 16, 2016, Trevali Mining will be added to the S&P/TSX Global Mining Index and the S&P/TSX Global Base Metals Index.

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.

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