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News

 June 02, 2017
Calibre's Partner IAMGOLD Exercises Second Option after Earning a 51% Interest in the Eastern Borosi Gold Project, Nicaragua

 Vancouver, British Columbia: Calibre Mining Corp. (TSX-V: CXB) (the "Company" or "Calibre") is pleased to announce that IAMGOLD Corporation ("IAMGOLD") has earned a 51% interest in Calibre's Eastern Borosi Gold Project, Nicaragua (the "Project") and has exercised the Second Option with the right to earn a further 19% in the Project. Additionally, Calibre announces the first set of results from the 2017 drilling program on the Eastern Borosi Gold Project which is being funded by Calibre's partner IAMGOLD.

Highlights
  • IAMGOLD has completed the First Option having paid $450,000 and completed expenditures of $5 million and has earned 51% interest in the Eastern Borosi Project
  • IAMGOLD has exercised the Second Option with the right to earn a further 19% in the Project (by paying $450,000 and further exploration expenditures of $5 million) having paid the first installment of $150,000
  • Drilling to date in 2017 consists of 16 diamond drill holes for a total of 5,160 metres, with results received and reported here for the first 14 holes; and the drilling is on-going
  • Step out drilling on the East Dome has intersected 8.00 metres grading 1.57 g/t gold and 38.3 g/t silver including 1.78 metres grading 5.69 g/t gold and 71.1 g/t silver
President and CEO Greg Smith stated: "We are pleased to have IAMGOLD exercise their second option to earn up to a 70% interest in the Eastern Borosi Gold Project. Drilling in 2017 continues to expand the gold-silver vein systems showing the robust nature of the mineralization. Drilling has extended mineralization along strike and down dip at both the Riscos de Oro and East Dome targets."

Recent Drill Highlights from Eastern Borosi Gold-Silver Project

Hole_ID Target   From m To m Length (m) Au (g/t) Ag (g/t)
BL17-052 East Dome   259.00 267.00 8.00 1.57 38.3
BL17-052 East Dome incl 264.05 265.83 1.78 5.69 71.1
BL17-054 East Dome   291.38 301.00 9.62 0.70 60.5
BL17-054 East Dome incl 292.80 294.10 1.30 3.78 208.0
BL17-054 East Dome 2nd zone 333.15 337.12 3.97 1.28 17.7
BL17-051 East Dome   134.78 145.5 10.72 0.24 57.3
BL17-051 East Dome 2nd zone 160.00 169.86 9.86 0.06 31.4
BL17-053 East Dome   227.40 231.88 4.48 0.83 42.1
BL17-053 East Dome 2nd zone 196.67 200.00 3.33 0.03 65.4
RD17-045 RDO   370.48 375.00 4.52 1.02 5.5
RD17-045 RDO 2nd zone 376.91 378.00 1.09 1.34 3.2

Notes:
- Intervals are core lengths / true width are estimated to be 70-80% of lengths.
- Length weighted averages from uncut assays.


IAMGOLD Option -- Eastern Borosi Project

Exploration to date on the Eastern Borosi Project has outlined several tens of kilometres of highly prospective mineralized structures located in an historic gold-silver mining district. Targets have been defined by surface soil and rock sampling, trenching and drilling.

IAMGOLD has completed the First Option having paid $450,000 and completed expenditures of $5 million and has earned 51% interest in the Eastern Borosi Project. Calibre and IAMGOLD entered into an option agreement dated May 26, 2014 whereby IAMGOLD can earn a 51% interest in the Project consisting of 176 km2 within the Borosi Concessions, Northeast Nicaragua. IAMGOLD has exercised the Second Option with the right to earn a further 19% in the Project (by paying $450,000 and further exploration expenditures of $5 million) having paid the first installment of $150,000 and the 2017 drilling program continues. The total potential investment by IAMGOLD to earn a 70% interest in the Project is US$10.9 million.

To date in 2017, Total holes completed to date: 16 (5 Guapinol, 3 RDO, 5 East Dome, 3 Main Blag) and total meterage to date 5,159.56m (1,427.92m Guapinol, 1,352.67m RDO, 1,334.35m East Dome, 1,044.62 Main Blag). Results have been received and are being reported in this news release for the first 14 holes. Drilling in 2017 is targeting a series of high grade gold-silver vein systems defined by historic drilling and drilling campaigns in 2014, 2015, and 2016. Step out drill holes are testing down plunge and on-strike extensions. Low sulphidation epithermal gold-silver mineralization intersected on the Eastern Borosi Project is hosted within porphyritic andesite and consists of structurally controlled, high energy quartz-carbonate vein breccias, vein-stockworks and discrete smokey quartz veins containing fine grained sulphide minerals.

Drilling at East Dome has extended the mineralization 100 metres to the south. The step out drilling intersected 8.0 metres grading 11.7 g/t silver (BL17-050), 10.72 metres grading 0.24 g/t gold and 57.3 g/t silver including 1.22 metres grading 1.36 g/t gold and 135.0 g/t silver and a second intercept of 9.86 metres grading 0.06 g/t gold and 31.4 g/t silver (BL17-051), 8.00 metres grading 1.57 g/t gold and 38.3 g/t silver including 1.78 metres grading 5.69 g/t gold and 71.1 g/t silver (BL17-052), 4.48 metres grading 0.83 g/t gold and 42.1 g/t silver and a second zone of 3.33 metres grading 0.03 g/t gold and 65.4 g/t silver (BL17-053), and 9.62 metres grading 0.70 g/t gold and 60.5 g/t silver including 1.30 metres grading 3.78 g/t gold and 208.0 g/t silver (BL17-054). Additional step out drilling will be completed on the East Dome target.

One kilometer west drilling on the Main Blag Gold-Silver Vein System has extended the mineralization 50 metres to the south testing the structure in that area to a depth of 325 metres below surface. The mineralized interval of 5.87 metres grades 0.12 g/t gold and 4.5 g/t silver (BL17-055), drill hole BL17-056 intersected the mineralization approximately 350 metres below surface with results pending. Drill hole BL17-057 was lost in a strong fault zone consisting of tectonic breccia and fault gouge.

Five holes tested the extensions of the Guapinol mineralization. Drill hole GP17-047 intersected 2.95 metres grading 0.45 g/t gold and 1.1 g/t silver. Hole GP17-048 intersected historic underground workings but no mineralized structure, while GP17-049 included 1.3 metres grading 1.02 g/t gold and 6.3 g/t silver, GP17-050 intersected 2.15 metres grading 0.39 g/t gold and 1.8 g/t silver, and GP17-051 included 7.2 metres grading 0.21 g/t gold and 1.4 g/t silver.

Drilling on the Riscos de Oro (RDO) Structure, the first drilling at RDO since 2011, has intersected 4.52 metres grading 1.02 g/t gold and 5.5 g/t silver with a second zone of 1.09 metres grading 1.34 g/t gold and 3.2 g/t silver (RD17-045), 4.78 metres grading 0.25 g/t gold and 2.3 g/t silver (RD17-044), and 3.00 metres grading 0.35 g/t gold and 1.7 g/t silver (RD17-043). Additional drilling is on-going testing step-outs on the RDO structure.

Calibre is committed to best practice standards for all exploration, sampling and drilling activities. Drilling was completed by independent firm Kluane Drilling Ltd. Analytical quality assurance and quality control procedures include the systematic insertion of blanks, standards and duplicates into the sample strings. Samples are placed in sealed bags and shipped directly to Acme Labs (a Bureau Veritas Group Company) in Managua, Nicaragua for sample preparation and then to Acme Labs in Vancouver, Canada for 50 gram gold fire assay and ICP-MS multi element analyses.

The technical content in this news release was read and approved by Gregory Smith, P.Geo, President and CEO of the Company who is the Qualified Person as defined by NI 43-101.

About Calibre Mining Corp.

Calibre owns a 100% interest in over 413 km2 of mineral concessions in the Mining Triangle of Northeast Nicaragua including the Primavera Gold-Copper Project and Santa Maria Gold Project. Additionally the Company has optioned to IAMGOLD (176 km2) and Centerra Gold (253 km2 ) concessions covering an aggregate area of 429 km2 and is party to a joint venture on the 33.6 km2 Rosita D gold-copper-silver project with Rosita Mining Corporation. Major shareholders of Calibre include gold producer B2Gold Corp, Pierre Lassonde and management.

Calibre Mining Corp.

"Greg Smith"

Greg Smith, P.Geo.
President and CEO


For further information contact:
Ryan King
604 628-1012
www.calibremining.com

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Cautionary Note Regarding Forward Looking Statements

This news release contains certain forward-looking statements. Any statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as "expects" or "does not expect", "is expected", "anticipates" or "does not anticipate" "plans", "estimates" or "intends" or stating that certain actions, events or results " may", "could", "would", "might" or "will" be taken, occur or be achieved) are not statements of historical fact and may be "forward-looking statements". Forward-looking statements are subject to a variety of risks and uncertainties which could cause actual events or results to materially differ from those reflected in the forward-looking statements.

Safe Harbor Statement under the United States Private Securities Litigation Reform Act of 1995: Except for the statements of historical fact contained herein, the information presented constitutes "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements including but not limited to those with respect to the price of gold, potential mineralization, reserve and resource determination, exploration results, and future plans and objectives of the Company involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievement of Calibre to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. There can be no assurance that such statements will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.


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