Recursos inferidos de Trevali aumentan 188% en mina Santander

Resumen: Trevali Mining Corporation anunció los resultados de su Instrumento Nacional Independiente del 2012 para la estimación de recursos minerales de su proyecto mina Santander en el centro-oeste de Perú. El programa de perforación en 2011 definió correctamente un importante incremento en contenido in-situ de metal inferido - Zinc aumenta un 162% a 1.41M de libras, plomo aumenta un 162% a 121M de libras y de la plata aumenta un 194% a 9.4M onzas. Cabe resaltar que la mineralización permanece abierta para la expansión.

Trevali Increases Inferred Resources by 188% to 13.84 Million Tonnes at Santander Zinc-Lead-Silver Mine Project in Peru-Provides Corporate Update

Major increase in contained in-situ inferred metal - Zinc increases 162% to 1.41 billion lbs, Lead increases 162% to 121 million lbs and Silver increases 194% to 9.4 million ounces - mineralization remains open for expansion.

VANCOUVER, BRITISH COLUMBIA--(Marketwire - July 5, 2012) - Trevali Mining Corporation ("Trevali" or the "Company") (TSX:TV)(TSX:TV.WT)(LMA:TV)(OTCQX:TREVF)(FRANKFURT:4TI) is pleased to announce the results of its 2012 independent National Instrument 43-101 mineral resource estimate update for the Santander zinc-lead-silver mine project in west-central Peru. The 2011 drill program successfully defined an additional inferred resource of 9.04 million tonnes at a 3% ZnEQ* cut-off, beneath the 2010 Magistral Central and South deposits and within the formerly-producing Santander Pipe deposit (Table 1 & Figure 1).

Resource Category	Cutoff ZnEQ (%)*	Million Tonnes	Grade					Contained Metal
			Ag (g/t)	Pb (%)	Zn (%)	Cu (%)	ZnEQ (%)*	Ag (M t.oz)	Pb (M lbs)	Zn (M lbs)	Cu (M lbs)
Indicated	1.00	8.544	35	1.06	3.05	0.06	4.92	9.613	200.258	574.066	11.523
	2.00	7.609	38	1.16	3.29	0.07	5.34	9.354	193.803	552.595	11.162
	3.00	6.264	43	1.30	3.62	0.07	5.95	8.740	179.734	500.218	10.199
	4.00	4.844	50	1.49	3.98	0.08	6.67	7.786	158.638	425.203	8.734
	5.00	3.556	58	1.70	4.34	0.09	7.46	6.592	133.510	340.513	7.013
Inferred	1.00	22.511	18	0.32	3.42	0.09	4.00	12.987	156.602	1,696.071	42.334
	2.00	18.065	20	0.36	3.99	0.10	4.62	11.496	142.313	1,589.804	39.263
	3.00	13.845	21	0.40	4.62	0.11	5.27	9.373	121.089	1,410.485	34.900
	4.00	10.145	23	0.45	5.24	0.13	5.93	7.346	101.423	1,171.555	28.699
	5.00	6.612	24	0.54	5.92	0.15	6.70	5.207	78.885	862.537	21.149
Table 1: 2012 Capped Indicated and Inferred Mineral Resources at Santander Project after Golder Associates Ltd.

To view Figure 1, please visit: http://media3.marketwire.com/docs/tv705_F1.pdf.

The 10,000-metre 2011 Resource Expansion drill program focused almost exclusively on expanding the down-dip extensions of the Magistral deposits as well as confirmation drilling on the formerly-producing Santander Pipe where mineral system analysis and 3D modeling suggested that significant tonnages may be present (Figure 2).

To view Figure 2, please visit: http://media3.marketwire.com/docs/tv705_F2.pdf.

"Since the initial discovery hole in early 2008, our exploration team has consistently delivered for the Company and continues to validate our belief in the significant exploration potential of the Santander project. We now have one of the larger undeveloped zinc-rich polymetallic systems in the Tier 1 Central Peruvian Mineral Belt and we continue to rank the exploration potential good-to-excellent and low-to-moderate risk - essentially everything remains open for expansion. We have identified 17 kilometres of permissive mineral fairway of which only approximately 800-900 metres has been drill tested. Consequently, we feel the odds of expanding the current upgraded resource and discovering new zones of mineralization going forward remain high," stated Dr. Mark Cruise, Trevali's President and CEO. "Furthermore, this dramatic increase in mineralization forms an excellent foundation for Trevali's plans to potentially double production in the short-to-medium term following final construction and commissioning of our initial 2,000-tonne-per-day processing plant later this year."

DETAILS

The updated resource estimate is based on 190 drill holes (42,000.8 metres), 109 sawn-channel samples (1,819.56 metres) and 10,585 geochemical assays in addition to 318 historic drill holes (18,507.29 metres), 947 historic channel samples (5,245.55 metres) and 7,812 historic assays for the Santander Pipe deposit. The resource estimate was conducted by and under the supervision of Greg Greenough P.Geo., an independent qualified person and Senior Resource Geologist at Golder Associates Ltd. ("Golder") of Mississauga, Canada, and utilized a 3% ZnEQ* cut-off-grade - which is the nominal base-case estimated grade of material that can be mined and processed considering all applicable costs. The mineral resources identified in Tables 1 and 2 are based on Ordinary Kriged (OK) capped values.

In detail, Trevali's 2011 drill campaign successfully defined an additional 3.94 million new inferred tonnes (3% ZnEQ* cut-off) within the Magistral Central-South deposits where drilling confirmed that the two deposits merge at depth (Figure 3). The new global estimated inferred tonnage for the Magistral deposits has now increased to 5.41 million tonnes with an average grade of 4.44% zinc, 22 g/t silver, 0.47% lead and 0.08% copper at 3% ZnEQ* cut-off - an increase of 269% (Table 2).

To view Figure 3, please visit: http://media3.marketwire.com/docs/tv705_F3.pdf.

Drilling and reconciliation studies also confirmed the presence of significant mineralization within the historically-mined Santander Pipe resulting in the addition of 5.08 million inferred tonnes at 3% ZnEQ* cut-off. Total inferred tonnage defined to date in the Santander Pipe is 8.4 million tonnes with an average grade of 4.75% zinc, 20 g/t silver, 0.34% lead, and 0.14% copper at 3% ZnEQ* cut-off or an increase of 153% compared with the 2010 NI 43-101 Resource Estimate (Table 2).

The Company believes that there is significant remaining exploration potential peripheral to and below the currently defined Santander Pipe resource and future drill programs will seek to expand upon this newly defined resource.

Table 2: July 2012 Resource Estimate by deposit

Magistral Central and South - Combined
Resource Category	Cutoff ZnEQ (%)*	Million Tonnes	Grade					Contained Metal
			Ag (g/t)	Pb (%)	Zn (%)	Cu (%)	ZnEQ (%)*	Ag (M t.oz)	Pb (M lbs)	Zn (M lbs)	Cu (M lbs)
Indicated	1.00	5.270	28	0.44	3.43	0.06	4.43	4.767	51.250	398.994	7.251
	2.00	4.637	31	0.47	3.74	0.07	4.83	4.601	48.277	382.493	6.986
	3.00	3.691	35	0.52	4.18	0.08	5.42	4.183	42.514	340.509	6.314
	4.00	2.738	40	0.59	4.67	0.09	6.09	3.565	35.346	281.846	5.276
	5.00	1.884	47	0.65	5.19	0.10	6.82	2.820	27.096	215.508	4.026
Inferred	1.00	9.006	18	0.19	3.12	0.06	3.56	5.103	37.950	618.817	11.484
	2.00	6.635	20	0.21	3.85	0.07	4.30	4.226	31.029	562.806	10.033
	3.00	4.792	20	0.22	4.62	0.08	5.00	3.109	23.159	488.276	8.373
	4.00	3.431	21	0.23	5.28	0.09	5.62	2.327	17.427	399.012	6.683
	5.00	2.149	23	0.24	5.93	0.10	6.27	1.598	11.423	280.945	4.681

Magistral North**
Resource Category	Cutoff ZnEQ (%)*	Million Tonnes	Grade					Contained Metal
			Ag (g/t)	Pb (%)	Zn (%)	Cu (%)	ZnEQ (%)*	Ag (M t.oz)	Pb (M lbs)	Zn (M lbs)	Cu (M lbs)
Indicated	1.00	2.789	50	2.23	2.61	0.07	6.17	4.483	136.874	160.343	4.195
	2.00	2.675	52	2.29	2.68	0.07	6.37	4.455	135.315	158.303	4.126
	3.00	2.355	57	2.47	2.89	0.07	6.90	4.311	128.425	149.905	3.848
	4.00	1.964	64	2.69	3.15	0.08	7.58	4.042	116.629	136.329	3.435
	5.00	1.592	72	2.91	3.44	0.08	8.29	3.662	101.989	120.648	2.974
Inferred	1.00	1.061	29	1.83	2.10	0.06	4.63	0.988	42.872	49.158	1.323
	2.00	0.877	33	2.06	2.42	0.06	5.27	0.932	39.849	46.716	1.216
	3.00	0.618	40	2.45	3.04	0.07	6.45	0.802	33.446	41.486	1.019
	4.00	0.480	46	2.72	3.54	0.08	7.33	0.705	28.777	37.498	0.878
	5.00	0.403	49	2.86	3.88	0.08	7.87	0.637	25.442	34.442	0.752

Puajanca South**
Resource Category	Cutoff ZnEQ (%)*	Million Tonnes	Grade					Contained Metal
			Ag (g/t)	Pb (%)	Zn (%)	Cu (%)	ZnEQ (%)*	Ag (M t.oz)	Pb (M lbs)	Zn (M lbs)	Cu (M lbs)
Indicated	1.00	0.486	23	1.13	1.38	0.01	3.05	0.362	12.134	14.729	0.077
	2.00	0.297	31	1.56	1.80	0.01	4.08	0.298	10.211	11.798	0.050
	3.00	0.219	35	1.82	2.03	0.01	4.66	0.247	8.796	9.804	0.036
	4.00	0.142	39	2.13	2.24	0.01	5.27	0.179	6.664	7.028	0.023
	5.00	0.081	42	2.49	2.45	0.01	5.90	0.110	4.424	4.357	0.012
Inferred	1.00	0.625	12	0.49	1.20	0.01	1.90	0.232	6.771	16.575	0.116
	2.00	0.261	16	0.67	1.65	0.01	2.61	0.135	3.889	9.518	0.051
	3.00	0.026	30	1.92	1.77	0.01	4.36	0.025	1.079	0.998	0.005
	4.00	0.017	31	2.24	2.02	0.01	4.92	0.017	0.850	0.767	0.003
	5.00	0.008	35	2.34	2.38	0.01	5.43	0.009	0.421	0.429	0.001

Santander Pipe***
Resource Category	Cutoff ZnEQ (%)*	Million Tonnes	Grade					Contained Metal
			Ag (g/t)	Pb (%)	Zn (%)	Cu (%)	ZnEQ (%)*	Ag (M t.oz)	Pb (M lbs)	Zn (M lbs)	Cu (M lbs)
Indicated	1.00	-	-	-	-	-	-	-	-	-	-
	2.00	-	-	-	-	-	-	-	-	-	-
	3.00	-	-	-	-	-	-	-	-	-	-
	4.00	-	-	-	-	-	-	-	-	-	-
	5.00	-	-	-	-	-	-	-	-	-	-
Inferred	1.00	11.820	18	0.26	3.88	0.11	4.40	6.663	69.009	1,011.520	29.411
	2.00	10.291	19	0.30	4.28	0.12	4.83	6.203	67.546	970.765	27.962
	3.00	8.409	20	0.34	4.75	0.14	5.35	5.438	63.405	879.725	25.503
	4.00	6.217	21	0.40	5.36	0.15	6.00	4.296	54.369	734.278	21.134
	5.00	4.052	23	0.47	6.12	0.18	6.81	2.963	41.598	546.722	15.715

* ZnEQ = ((Ag Price(g) x Ag Recovery x Ag Grade) + (Pb Price(t) x Pb Recovery x (Pb Grade(%)/100)+(Zn Price(t) x Zn Recovery x (Zn Grade(%)/100)))/Zn Price(t). Golder utilized the US dollar three year rolling average price for all three metals. Price for silver is ($25.99/oz) and that for Pb ($2,205), Zn ($2,094) and Cu ($7,782) is per tonne. A recovery of 85% was applied to Ag, 90% for Pb, 85% for Zn and 60% for Cu for calculating the ZnEQ formula. The pounds of metal are in-situ and have not had any mining factors applied to them.

** Resource estimates for Magistral North and Puajanca South are unchanged from 2010 but have been updated to reflect 2012 metal prices.

*** The Santander Pipe resource contains two distinct components, material below 4,015 m elevation which has not been mined and material above 4,015 m elevation which is adjacent to former mine infrastructure (Figure 4). At the 3% ZnEQ cut-off, material below 4,015 m elevation accounts for 2.691 M tonnes at 14 g/t Ag, 0.06% Pb, 0.08% Cu and 5.45% Zn, and material above 4,015 m elevation accounts for 5.718 M tonnes at 23 g/t Ag, 0.48% Pb, 0.17% Cu and 4.41% Zn.

To view Figure 4, please visit: http://media3.marketwire.com/docs/tv705_F4.pdf.

CORPORATE UPDATE

CHIEF OPERATING OFFICER

Trevali is pleased to announce the appointment of Mr. Paul Keller, P.Eng, as Chief Operating Officer. Mr. Keller joined Trevali in May 2011 as Vice-President Operations and has been instrumental in the permitting and construction of the Company's Halfmile Mine and oversight of its Santander project. Mr. Keller has over 28 years of extensive mine operations experience in Canada. Prior to joining Trevali, he was Manager of Technical Services for a major Canadian mining contractor where he led a team of engineers and designers on various mining contracts for major mining companies. Mr. Keller began his career with Rio Algom Limited and has also worked in various management roles with Barrick Gold's Hemlo mine in operations, engineering and maintenance. Mr. Keller holds a Bachelor of Engineering/Mining from Laurentian University and is a Professional Engineer.

WORKING CAPITAL LINE OF CREDIT

Trevali Mining Corporation is also pleased to announce that it has entered into an agreement with Auramet Trading LLC for a receivables working capital line of credit of US$5 million. Trevali intends to use the facility to support the Company's Halfmile mining activities and for general corporate purposes. Auramet, based in Fort Lee, New Jersey, is a leading metals trading, merchant banking and advisory firm specializing in the global resource sector.

Fuente: http://tmx.quotemedia.com