Trevali Mining Corporation ("Trevali" or the "Company") (TSX:TV)(LMA:TV)(OTCQX:TREVF)(FRANKFURT:4TI) announces results from three diamond drill holes that are part of the ongoing 2016 underground exploration drill program at its Santander Zinc Mine in Peru. The aim of the current phase of drilling is to extend the down-dip expression of the Magistral Central (MC) zone, to test between Magistral North (MN) and MC zones in addition to test for the potential presence of hanging-wall hosted "Oyon" mineralization.
Drill hole MC-181 targeted the area between MC and MN at the 4370 level where geological modeling indicted the presence of a high priority target. The sub-horizontal drill hole intersected 3.15 metres of high-grade Pb-Ag-Zn mineralization followed by 3.8 metres of high-grade Zn-Ag mineralization at approximately 94 metres downhole for an aggregate true thickness of 6.95 metres (Table 1). This exceptionally high-grade replacement mineralization remains open for expansion and step-out drilling is in progress (Figure 1 & 2).
In detail, the mineralization is proximal to existing mine workings (just 95 metres from the main 4370 level) and readily accessible. Approximately 200 metres below MC-181, two drill holes (MC-179 and MC-180) intercepted new, narrow polymetallic mineralization which effectively links the Magistral bodies at these levels, and co-insides with the upper portion of the 2011 downhole geophysical anomaly that extends to depth (Figure 1 and see News Release dated October 24, 2011 for details).
Table 1: Summary of MC-181-16 drill hole assay results.
(i)True widths of the mineralized intervals are estimated between 75-100% of core length.
To view "Figure 1: 3D view (longitutinal cross-section) looking west showing Magistral Deposits with recent drill hole intercepts," and "Figure 2: Cross-section, looking north illustrating geometry of the high grade mineralization intersected at MC-181 and MC-171 (previously reported) at the Santander Zinc Mine," please visit the following link: http://media3.marketwire.com/docs/trevali_mining_oct31_fig01_02.pdf
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.