Calibre Mining Expands 100% Owned Concessions to 586 Square Kilometres, Borosi Mining District, Northeast Nicaragua - Seite 2

Calibre controls 100% of 586 km² in the Borosi District. All 100% Calibre Owned areas were advanced in 2015 with drilling on the Montes de Oro Project within the Northern Siuna District, soil and rock sampling on the Carpatos District, testing and sampling of several targets within the Rosita District and initial stream sediment sampling covering the El Paste Concession.

Rosita District Projects

The 214 km² District is host to a series of advanced targets including the Santa Maria, high grade gold-silver low sulphidation epithermal vein system. Other advanced Targets include Minnesota, Terciopelo, and others previously within the B2Gold Joint Venture.

The Santa Maria Project consists of a well-defined low sulphidation epithermal mineralization. Previous work by Calibre includes 16.3 line kilometres of soil sampling (812 samples), 55 rock samples as well as geological mapping over 9 km². Low Sulphidation Epithermal vein mineralization is confirmed over 800 metres of strike length, and inferred over a total strike length of three kilometres. Rock sample results include; 64.1 g/t Au, 109 g/t Ag, 0.513% Cu, and 3.75% Pb,. Soil results define a 1000m x 50-100m Au-Pb-Zn ± Cu soil anomaly with results to 666 ppb Au, 1190 ppm Pb, 1050 ppm Zn and 889 ppm Cu.

The central portion of the Santa Maria Project area has been subjected to intermittent artisanal mining activity along a strike length of 800m. Exposures are largely limited to shallow shafts and pits which have been excavated by artisanal groups; rare float material is located in some areas. Sampling by Calibre has consistently returned anomalous gold and silver with highlighted results including;

Sample		Lithology		Type		Au g/t		Ag g/t		Cu ppm		Pb ppm
B10R0350		Quartz Vein		Outcrop		64.1		109.0		2110		1620
B10R1421		Quartz Vein		Outcrop		22.3		26.4		2800		2590
B10R5124		Quartz Vein		Outcrop		20.9		109.0		958		1120
B10R0351		Quartz Vein		Outcrop		20.4		56.1		2760		2100
B10R1420		Silicified Andesite		Outcrop		14.1		93.1		4130		23600
B10R1507		Quartz Vein		Float		12.6		13.5		1250		2850
B10R5128		Quartz Vein		Outcrop		11.0		66.0		5130		37500

The 100% owned Rosita District also hosts the Minnesota Gold Project. 2014 reconnaissance diamond drilling program at the Minnesota gold project consisted of seven widely spaced drill holes totaling 992 metres which tested three areas along the 3.5 km by 1.0 km trend of the defined by a strong auger and gold-in soil anomaly and surface rock sampling. Drilling results include: 31.35 metres grading 0.63 g/t Au including 12.40 metres grading 1.07 g/t Au and 47.0 metres grading 0.63 g/t Au including 4.50 metres grading 3.43 g/t Au.