Calibre Mining Corp. announced results of the 2017 RC (Reverse Circulation) drilling program on the 100% owned Primavera Gold-Copper Porphyry Project, Nicaragua. Highlights: The 2017 RC drilling program consisted of 19 holes totaling 2,758.5 metres including 12 holes at the Santa Juana Target two kilometres south of the Primavera Deposit and six holes testing the NE Extension Anomaly one kilometre east of Primavera. Drilling to date has tested less than 5% of the surface geochemical, geophysical, and geological anomaly that defines the Primavera Gold-Copper District potential. A maiden resource estimated in December 2016 for the Primavera Gold-Copper Porphyry Deposit contains an Inferred Resource at a 0.5 g/t AuEq cutoff of 45.0 million tonnes grading 0.84 g/t AuEq containing 782,000 ounces of gold, 1.7 million ounces of silver and 219 million pounds of copper (1.2 million AuEq ounces). The 2018 exploration program has commenced with rock and soil geochemistry and geological mapping. Exploration in first half of 2018 will also include further target definition as well as additional drilling to test new gold-copper zones. The 2017 drilling program intersected widespread porphyry style alteration and mineralization with intervals including; 10.5m grading 0.38 g/t Au and 0.03 % Cu, 36.0m grading 0.27 g/t Au and 0.05 % Cu, 160.5m grading 0.11 g/t Au and 0.06 % Cu, 9.0m grading 1.76 g/t Au and 0.02 % Cu, 76.5m grading 0.11 g/t Au and 0.02 % Cu, and 45.0m grading 0.16 g/t Au and 0.13 % Cu. The 2017 RC drilling program also included one drill hole drilled within the existing Primavera Deposit and confirmed the width and grade of gold-copper mineralization intersecting; 234m grading 0.83 g/t Au and 0.27 % Cu (1.25 AuEq g/t) including 129m grading 1.06 g/t Au and 0.28 % Cu (1.51 AuEq g/t). Numerous high priority drill targets prospective for further gold-copper porphyry mineralization continue to exist within the 5.0 kilometre by 4.0 kilometre Primavera target area with a second target area of 3.0 kilometres by 2.0 kilometres located five kilometres west at San Isidro. Additional drilling will be completed in 2018.