Trevali intersects significant massive sulphide mineralization outside current Caribou Mine resource

VANCOUVER, BRITISH COLUMBIA--(Marketwired - March 13, 2017) - Trevali Mining Corporation ("Trevali" or the "Company") (TSX:TV)(LMA:TV)(OTCQX:TREVF)(FRANKFURT:4TI) announces that exploration drilling at its Caribou Zinc Mine in the Bathurst Mining Camp of New Brunswick has intersected significant massive sulphide mineralization approximately 350-metres outside the currently defined measured and indicated resource.

Drill hole BR-1017 was designed to test the approximately 200-metre west-northwest down-dip extension of drill hole BR-1014A (that intersected 50.9 metres grading 5.08% Zn, 1.76% Pb, 0.37% Cu, 59.66 g/t Ag & 1.63 g/t Au, see Trevali news release dated April 16, 2015). The hole intersected 7.1 metres of massive sulphide at a downhole depth of 812.5 metres (vertical depth of approximately 725 metres) grading 4.91% Zn, 2.06% Pb, 0.37% Cu, 77.92 g/t Ag & 2.52 g/t Au (Table 1).

Drill hole BR-1018 was designed to test the northwest down-plunge extension of the "Caribou Mineral Horizon" that remains relatively underexplored (Figure 2). The hole intersected 32.1 metres of sulphide mineralization at a downhole depth of 808 metres (vertical depth of approximately 770 metres) grading 3.36% Zn, 1.28% Pb, 0.74% Cu, 37.41 g/t Ag & 0.94 g/t Au, within which several higher-grade intervals occur including 12.95 metres of 4.77% Zn, 2.02% Pb, 0.43% Cu, 51.14 g/t Ag & 1.57 g/t Au (Table 1).

Down hole geophysics (BHEM) from both of these holes suggests strong continuity of mineralization in the area around BR-1014A, additional follow up drilling is underway with the goal of defining the limits of mineralization and brining this zone of mineralization into the geologic resource.

"These significant, deeper massive sulphide mineralized intercepts at our Caribou Zinc Mine continue to demonstrate the resource expansion potential of the deposit," stated Dr. Mark Cruise, President and CEO. "The ultimate mine life at Caribou has yet to be defined and we remain greatly encouraged by the results that clearly demonstrates the deposit remains open at depth."

The Company looks forward to the completion of its 2016/2017 winter drill campaign and will release the results as they become available.

Drill hole	Depth From - To (metres)		Core Length Interval* (metres)	Zn (%)	Pb (%)	Cu (%)	Ag (g/t)	Au (g/t)
BR-1016	No significant intercept
BR-1017	812.58 - 819.68		7.10	4.91	2.06	0.37	77.92	2.53
BR-1018	808.00 - 840.10		32.10	3.36	1.28	0.74	37.41	0.94
	incl. 808.00 - 820.95		12.95	4.77	2.02	0.43	51.14	1.57
	incl. 822.90 - 830.50		7.60	1.30	0.37	1.84	19.53	0.33
	incl. 836.24 - 840.10		3.86	5.65	1.69	0.72	62.49	0.95

Table 1:

Summary of BR-1016-1018 drill hole assay results. *Length and specific gravity weighted composites. Intervals are approximately 60-70% of true thickness.

To view Figure 1: Geologic map with projected sulphide mineralization, please visit this link: http://media3.marketwire.com/docs/1088579_FIGURE-1.pdf