CALIBRE MINING CORP. : http://www.calibremining.com/ : QwikReport

News

#Mon Jul 19, 2010
Calibre Intersects 9.0 G/T Gold And 30.0 G/T Silver Over 4.14 Metres At The Riscos De Oro Gold-Silver Property, Nicaragua

 Vancouver, British Columbia: Calibre Mining Corp. (TSX-V: CXB) (the "Company" or "Calibre") is pleased to announce additional high grade gold and silver assay results from its drill program on the Riscos de Oro epithermal gold-silver project within the Borosi Concessions in northeast Nicaragua. The concessions are subject to an option agreement, whereby B2Gold Corp. may earn an initial 51% interest by completing C$8 million in exploration expenditures over a period of three years. Drill hole RD10-005 was collared approximately 200 metres on strike and to the northeast of hole RD10-001 (previously released June 1, 2010). Drill hole RD10-005 intercepted 9.0 g/t Au and 30.0 g/t Ag over 4.14 metres, from 242.91 metres to 247.05 metres, including 13.3 g/t Au and 37.8 g/t Ag over 1.08 metres. The mineralization is characterized by low sulphidation epithermal banded quartz veins and quartz breccias that are interpreted to be a new gold zone within the Riscos vein system. Riscos de Oro is a southwest trending, low sulphidation epithermal gold-silver quartz vein system that has been traced on surface for over 2.0 kilometres. Riscos de Oro was previously mined by both open pit and underground methods to a depth of 93 metres from 1972 through to 1981.

Robert Brown, President and CEO stated "Riscos de Oro is a very compelling gold-silver target with hole RD10-005 confirming that the Riscos mineralized system is robust and comprised of a number of gold-silver mineralized shoots that have been traced on strike and to depth below the shallow, historic open pit and underground mine development."

An additional hole, RD10-009, collared 50 metres on strike to the northeast of RD10-005, has also intercepted banded sulphosalts hosted in a 6 metre wide zone of banded quartz veins and quartz breccias at a down hole depth of 165 metres. Assays for this hole are pending. Plan maps, cross sections and a longitudinal section of the Riscos de Oro property can be found at the company's website.

The initial drill program on the Borosi gold-silver-copper project is now completed with Calibre drilling 5,180 metres over a four month period on three separate targets; Riscos de Oro, La Luna and Bambana. Assay results are pending for 7 drill holes from Riscos de Oro and La Luna.

Quality assurance and quality control procedures include the systematic insertion of blanks, standards and duplicates into the soil and rock sample strings. Samples are placed in sealed bags and shipped directly to ALS CHEMEX labs in North Vancouver, BC for gold fire assay and ICP multi element analyses. The technical content in this news release was read and approved by Roger March, P.Geo., a professional geologist registered in the Province of Newfoundland & Labrador and a qualified person as defined by NI 43-101.

Calibre Mining Corp. is an aggressive, well financed, TSX Venture Exchange listed company (TSX.V: CXB) that is focused on the acquisition, exploration and development of gold and copper deposits in Central America. Major shareholders of Calibre include gold producer Yamana Gold Inc.

Calibre Mining Corp.

Signed "Robert Brown"

Robert D. Brown, B.Sc., MBA
President and CEO


For further information contact:
Robert Brown -- Vancouver, Canada
604 681 9944
www.calibremining.com

Neither 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
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, silver or copper, 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 Mining Corp. 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.
 
#Wed Jun 30, 2010
Calibre Intersects 11.05 G/T Gold And 72.30 G/T Silver Over 2.30 Metres At The Borosi Gold-Silver-Copper Concessions, Nicaragua

 Vancouver, British Columbia: Calibre Mining Corp. (TSX-V: CXB) (the "Company" or "Calibre") is pleased to announce additional high grade gold and silver assay results from its continuing drill program on both the Riscos de Oro and La Luna epithermal gold-silver projects within the 100% owned Borosi Concessions in northeast Nicaragua. Highlights of the drilling include 11.05 g/t gold and 72.30 g/t silver over 2.30 metres in hole RD10-003 from Riscos de Oro and 5.08 g/t gold and 36.65 g/t silver over 2.0 metres in hole LL10-006 from La Luna.

Robert Brown, President and CEO stated: "The results from Riscos de Oro drilling now confirm the continuity of mineralization to a depth of 210 metres below the historical workings, while results from La Luna have confirmed the mineralization of the La Luna vein system over an 1100 metres strike length and to a depth of 106 metres. Of the 10 drill holes completed to date on the Riscos de Oro and La Luna targets 8 holes or 80% have intersected significant widths and grades of gold-silver mineralization verifying the extensive and robust nature of these precious metal systems. Both zones remain open along strike and at depth."

Table 1: Highlights of Borosi Diamond Drilling Results
Project Drill Hole From (m) To
 (m)
Interval
(m)
Gold
(g/t Au)
Silver
(g/t Ag)
Riscos de Oro RD10-002 205.40 210.30 4.90 0.97 28.72
  including 207.40 209.40 2.00 1.77 56.40
  RD10-003 296.30 299.70 3.40 8.81 55.74
  including 297.40 299.70 2.30 11.05 72.30
La Luna LL10-004 110.72 117.00 6.28 1.63 13.61
  including 110.72 113.00 2.28 2.11 13.49
  LL10-006 127.00 131.00 4.00 2.77 19.38
  including 129.00 131.00 2.00 5.08 36.65
    137.60 140.50 2.90 0.85 22.46
  LL10-007 18.95 20.70 1.75 2.99 30.66
    113.70 117.05 3.35 2.40 4.91
    116.39 117.05 0.66 7.14 8.66
Drill Holes LL10-003, LL10-005 did not contain significant results.

Riscos de Oro Project

Riscos de Oro is a northeast trending, low sulphidation epithermal gold-silver quartz vein system that has been traced on surface for over 2.0 kilometres. Riscos de Oro was previously mined by both open pit and underground methods from 1972 through to 1981. The main ore shoot at Riscos de Oro was only mined down to an approximate depth of 93 metres below surface and along strike for 300 metres. Calibre's first drill hole at Riscos de Oro (RD10-001 results released June 1, 2010) successfully intersected this zone at a vertical depth of 155 metres below surface and confirmed the continuation of high grade gold and silver. Two additional drill holes (RD10-002 and RD10-003) have both intersected the main Risco's ore shoot at a vertical depth of 200 metres and 275 metres respectively, and confirm that mineralization within the Riscos main ore shoot extends from surface to 355 metres down dip. Highlights from this drilling include 11.50 g/t gold and 72.30 g/t silver over 2.30 metres (RD10-003). The Riscos quartz vein system is open at depth and along strike. Four additional drill holes are scheduled to be completed on the Riscos de Oro vein system during the current drill program.

La Luna Project

La Luna is a northwest trending, gold and silver bearing, epithermal quartz vein system which has been delineated for over 2.0 kilometres through a soil sampling and trenching program. The initial drill hole (LL10-002 -- results previously released June 1, 2010) confirmed the depth extent of mineralization below a small historic open cut in the southern zone. A second drill hole (LL10-004) was drilled underneath LL10-002 to further test the depth extent of mineralization and successfully intercepted the quartz vein returning 1.63 g/t gold over 6.28 metres at a vertical depth of 110 metres below surface.

The strike extent of La Luna has been tested by a series of drill holes on 250 metre fences along an 1100 metre north west trending ridge. Hole LL10-006, 1082 metres north of LL10-002, returned encouraging results of 5.08 g/t gold and 36.65 g/t silver over 2.0 metres at a depth of 115 metres below surface, while Hole LL10-007 successfully identified two mineralized zones; one zone within 15 metres of surface returning 2.99 g/t gold and 30.66 g/t silver over 1.75 metres and the second at a vertical depth of 100 metres returning 2.40 g/t gold over 3.35 metres. Four additional drill holes are scheduled to be completed on the La Luna vein system during the current drill program.

Borosi Concessions

The Borosi concessions cover approximately 71,000 hectares within the historic Mining Triangle of Nicaragua. The concessions are subject to an option agreement, whereby B2Gold Corp. may earn an initial 51% in the Borosi concessions by completing C$8 million in exploration expenditures over a period of three years. Calibre and B2Gold have agreed to extend the C$2.5 million year one expenditure commitment to October 1, 2010; Calibre remains as operator.

Quality assurance and quality control procedures include the systematic insertion of blanks, standards and duplicates into the soil and rock sample strings. Samples are placed in sealed bags and shipped directly to ALS CHEMEX labs in North Vancouver, BC for gold fire assay and ICP multi element analyses. The technical content in this news release was read and approved by Roger March, P.Geo., a professional geologist registered in the Province of Newfoundland & Labrador and a qualified person as defined by NI 43-101.

Calibre Mining Corp. is an aggressive, well financed, TSX Venture Exchange listed company (TSX.V: CXB) that is focused on the acquisition, exploration and development of gold and copper deposits in Central America. Major shareholders of Calibre include gold producers Yamana Gold Inc. and Kinross Gold Corp.

Calibre Mining Corp.

Signed "Robert Brown"

Robert D. Brown, B.Sc., MBA
President and CEO


For further information contact:
Robert Brown -- Vancouver, Canada
604 681 9944
www.calibremining.com


Neither 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
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, silver or copper, 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 Mining Corp. 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.
 
#Tue Jun 1, 2010
Calibre Intersects 14.05 G/T Gold And 1,990.00 G/T Silver Over 0.8 Metres At The Borosi Property, Nicaragua

 Vancouver, British Columbia: Calibre Mining Corp. (TSX-V: CXB) (the "Company" or "Calibre") is pleased to announce high grade gold and silver assay results from its initial drill program on both the La Luna and Riscos de Oro epithermal gold-silver projects within the 100% owned Borosi Gold-Silver-Copper Concessions in northeast Nicaragua. Highlights of the drilling include 12.20 g/t gold and 105.10 g/t silver over 2.6 metres in hole LL10-002 from La Luna and 14.05 g/t gold and 1,990.00 g/t silver over 0.8 metres in hole RD10-001 from Riscos de Oro.

Robert Brown, President and CEO stated: "The La Luna and Riscos de Oro results are significant as they represent Calibre's first drill test on two epithermal gold-silver systems each of which has been traced on surface for over 2.0 kilometres on the Borosi concessions. The initial drill results confirm the depth continuity of epithermal gold-silver mineralization intersected in surface trenches and historic workings on the two projects. A third drill rig has arrived on the property to assist in delineating the extent of the mineralized zones along strike and at depth."

Table 1: Highlights of Borosi Diamond Drilling Results

Project Drill Hole From (m) To
(m)
Interval
(m)
Gold
(g/t Au)
Silver
(g/t Ag)
Copper
(% Cu)
La Luna LL10-001 115.70 123.45 7.75 1.43 7.51 -
  LL10-002 90.00 99.00 9.00 4.63 39.75 -
  Including 90.00 97.00 7.00 5.88 50.16 -
  Including 92.40 95.00 2.60 12.20 105.10 -
Riscos de Oro RD10-001 177.60 183.40 5.80 2.44 292.60 -
  Including 177.60 178.40 0.80 14.05 1990.00 -
    186.10 190.25 4.15 1.01 - -
Bambana BB10-001 71.50 73.50 2.50 - 28.15 1.05
    79.00 121.00 42.00 - - 0.43
  BB10-002 58.10 58.65 0.55 9.02 75.50 0.11
    75.40 86.90 11.50 0.25 10.41 0.51
  Including 75.40 78.62 3.22 0.23 21.81 1.15
    83.15 86.90 3.75 0.55 12.39 0.54
  BB10-003

No significant results


La Luna Project

La Luna is a northwest trending, gold and silver bearing, epithermal quartz vein system which has been delineated for over 2.0 kilometres through a soil sampling and trenching program. The initial drill program is testing the depth extent of mineralization below a small historic open cut in the southern zone and along strike in the northern zone. Drilling below the small open cut at the southern end of La Luna returned 5.88 g/t gold and 50.16 g/t silver over 7.0 metres (LL10-002) and has confirmed mineralization to a depth of 82 metres below surface. The vein is open at depth and along strike and has been intersected in follow up hole LL10-004 (assay results pending) drilled approximately 110 metres below surface from the same collar location as LL10-002.

The first drill hole in the northern zone (700 metres north of LL10-002) returned 1.43 g/t gold and 7.5 g/t silver over 7.75 metres (LL10-001) at a depth of approximately 100 metres below trench BTR10-009. Six more drill holes will further test this northern section, following up on results from recent trenching that include BTR10-011: 4.93 g/t gold, 191.8 g/t silver over 3.2 metres and BTR10-012: 3.2 g/t gold and 90.01 g/t silver over 2.6 metres (see April 21, 2010 news release). Assays from the northern holes are pending.

Riscos de Oro Project

Riscos de Oro is a northeast trending, low sulphidation epithermal gold-silver quartz vein system that has been traced on surface for over 2.0 kilometres. Riscos de Oro was previously mined by both open pit and underground methods from 1972 through to 1981. The main ore shoot at Riscos de Oro was only mined down to a 300 foot level (approximately 93 metres) below surface. Calibre's first drill hole at Riscos de Oro (RD10-001) has intersected this zone at a vertical depth of 155 metres (approximately 508 feet) below surface, returning 2.40 g/t gold and 292 g/t silver over 5.80 metres, including 14.05 g/t gold and 1,990.00 g/t silver over 0.80 metres, confirming the continuation of high grade gold-silver mineralization at a depth of 62 metres below the last known workings on the project. This zone remains open at depth and along strike and is currently being tested by a further three drill holes.

A third drill rig has arrived on the project and will test along strike of the main Riscos de Oro vein while the second rig continues testing the main ore shoot at depth.

Bambana Project

The Bambana project is located four kilometres northwest of the past producing Santa Rita copper mine, a copper skarn deposit that is estimated to have produced 305 million pounds of copper over the mine life1. The Bambana drill program tested two areas. The first area is a 500 metre by 300 metre area associated with artisanal gold workings and a small prospecting pit. Two drill holes on his target returned 0.43% Cu over 42 metres (BB10-001) and 9 g/t gold and 75.5 g/t silver over 0.55 metres (BB10-002). The third drill hole tested a northeast trending structure but returned no significant values.

Borosi Concessions

The Borosi concessions cover approximately 71,000 hectares within the historic Mining Triangle of Nicaragua. The concessions are subject to an option agreement, whereby B2Gold may earn an initial 51% in the Borosi concessions by completing C$8 million in exploration expenditures over a period of three years. The Borosi exploration budget through July 2010 is C$2.5 million, with Calibre acting as operator.

Quality assurance and quality control procedures include the systematic insertion of blanks, standards and duplicates into the soil and rock sample strings. Samples are placed in sealed bags and shipped directly to ALS CHEMEX labs in North Vancouver, BC for gold fire assay and ICP multi element analyses. The technical content in this news release was read and approved by Roger March, P.Geo., a professional geologist registered in the Province of Newfoundland & Labrador and a qualified person as defined by NI 43-101.

Calibre Mining Corp. is an aggressive, well financed, TSX Venture Exchange listed company (TSX.V: CXB) that is focused on the acquisition, exploration and development of gold and copper deposits in Central America. Major shareholders of Calibre include gold producers Yamana Gold Inc. and Kinross Gold Corp.

1 From Arengi et al (2002).

Calibre Mining Corp.

Signed "Robert Brown"

Robert D. Brown, B.Sc., MBA
President and CEO


For further information contact:
Joyce Musial -- Vancouver, Canada
604 681 9944
www.calibremining.com

Neither 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
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, silver or copper, 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 Mining Corp. 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.
 
#Tue May 4, 2010
Calibre Announces Drilling Update At Borosi Gold-Copper Concessions, Nicaragua

 Vancouver, British Columbia: Calibre Mining Corp. (TSX-V: CXB) (the "Company" or "Calibre") is pleased to announce that the first round of diamond drilling has been completed at the Bambana copper-gold project and has commenced at the Riscos de Oro gold-silver project. As announced on April 22, 2010, a second drill rig is active on the La Luna gold-silver project. The Bambana, Riscos de Oro and La Luna projects are located within Calibre's 100% owned Borosi gold-copper concessions in northeast Nicaragua.

Bambana Project
Three diamond drill holes are completed at the Bambana project and results will be reported when received and compiled. The drill program is testing two areas. The first area is a 500 metre by 300 metre area associated with artisanal gold workings and a small prospecting pit. The area has anomalous gold and copper soil anomalies and coincident geophysics. Sampling of the prospecting pit by Calibre returned grades of 1.64 g/t gold, 1,645 g/t silver and 29.9% copper over 0.90 metres. The second area is drill testing a northeast trending structure that is associated with gold and copper soil anomalies and geophysical targets.

The Bambana project lies four kilometres northwest of the past producing Santa Rita copper mine, a copper skarn deposit that is estimated to have produced 305 million pounds of copper over the mine life1.

Riscos de Oro Project
Diamond drilling has commenced at the Riscos de Oro project and will focus on two targets: the main Riscos de Oro vein that contains historic open pit and underground workings; and a possible parallel vein located 800 metres to the northwest.

The down dip vein extensions at the historic Riscos mine will be drill tested approximately 200 metres below surface. Historic drilling by Rosario Resources from the zone between the 46 metre and 93 metre abandoned development levels reported intercepts of 9.43 g/t gold and 163 g/t silver over 6.2 metres (DDH SG-16), 14.5 g/t gold and 174 g/t silver over 3.79 metres (DDH SG-17) and 8.06 g/t gold and 563 g/t silver over 4.1 metres (DDH SG-4)2. The drill program will also follow up on the northeast and southwest extensions of the Riscos vein trend as well as the parallel zone northwest of the Riscos mine.

2009/2010 Exploration Program at Borosi
The planned diamond drill program at the Borosi concessions consists of drill testing three projects: the Bambana project, the La Luna project and the Riscos de Oro project. In addition, systematic exploration of other high priority prospects at Borosi will be ongoing to further define drill targets.

The Borosi concessions cover approximately 71,000 hectares within the historic Mining Triangle of Nicaragua. The concessions are subject to an option agreement, whereby B2Gold may earn an initial 51% in the Borosi concessions by completing C$8 million in exploration expenditures over a period of three years. The Borosi exploration budget through July 2010 is C$2.5 million, with Calibre acting as operator.

The technical content in this news release was read and approved by Roger March, P.Geo., a professional geologist registered in the Province of Newfoundland & Labrador and a qualified person as defined by NI 43-101.

Calibre Mining Corp. is an aggressive, well financed, TSX Venture Exchange listed company (TSX.V: CXB) that is focused on the acquisition, exploration and development of gold and copper deposits in Central America. Major shareholders of Calibre include gold producers Yamana Gold Inc. and Kinross Gold Corp.

1From Arengi et al (2002).
2 Rosario Resources company records on Riscos de Oro. Circa 1975 to 1977. No drill core remains from the Rosario drill programs and, therefore, Calibre is unable to independently verify the accuracy of these historic results.


Calibre Mining Corp.

Signed "Robert Brown"

Robert D. Brown, B.Sc., MBA
President and CEO


For further information contact:
Joyce Musial -- Vancouver, Canada
604 681 9944
www.calibremining.com

Neither 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
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, silver or copper, 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 Mining Corp. 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.
 
#Thu Apr 22, 2010
Calibre Reports Trench Results From Borosi Gold-Copper Concessions, Nicaragua

 Vancouver, British Columbia: Calibre Mining Corp. (TSX-V: CXB) (the "Company" or "Calibre") is pleased to report assay results from channel sampling of trenches, and the commencement of drilling at the La Luna gold-silver project located within Calibre's 100% owned Borosi gold-copper concessions in northeast Nicaragua.

La Luna Project
The drill program at La Luna will follow up on improved assay results from recently re-sampled quartz veins in trenches. To obtain a better representative sample of the quartz veins, channel samples from the trenches were cut by saw rather than previously reported chip sampling methods (see news release February 3, 2010 and March 31, 2010). In addition, the channel samples were assayed by both the atomic absorption (AA) method as well as the more comprehensive gravimetric method. The channel samples, on average, have returned a 35% increase in gold grade (based on a gravimetric finish) and an 11% interval increase over the chip samples. Trench results from channel sampling and the previously released chip sampling are outlined below.

La Luna Project - Trench Assay Results
 

Channel Sample

Chip Sample*

 

Interval

AA

Gravimetric

AA

Interval

Trench

From
(m)

To
(m)

Metres

Gold
(g/t)

Silver
(g/t)

Gold
(g/t)

Silver
(g/t)

Gold
(g/t)

(m)

BTR10-010

11.50

16.00

4.50

2.51

7.61

2.57

3.63

2.25

3.70

BTR10-011

8.50

11.70

3.20

4.62

194.40

4.93

191.80

3.92

3.20

BTR10-012

7.80

10.40

2.60

2.46

75.48

3.20

90.01

3.11

2.10

BTR10-017

7.50

10.20

2.70

3.85

38.12

3.77

36.85

1.45

2.30

*previously released

The diamond drill program at La Luna will test a zone of gold-bearing epithermal quartz veins and quartz breccias. These veins and breccias were delineated over a strike length of 1,100 metres through a soil sampling program and a series of five trenches. Mineralized intercepts from those five trenches average 3.62 g/t Au and 66 g/t Ag over 3.4 metres. Drilling at La Luna will also test the depth extent of a zone associated with an historical small open cut which assayed 3.5 g/t gold over 12.6 metres. Diamond drilling results will be reported when received and compiled.

2009/2010 Borosi Exploration Program
The 26 hole, 6,000 metre diamond drill program at the Borosi concessions consists of drill testing three projects: the Bambana project, the La Luna project and the Riscos de Oro project. In addition, systematic exploration of other high priority prospects at Borosi will be ongoing to further define drill targets.

Quality assurance and quality control procedures include the systematic insertion of blanks, standards and duplicates into the soil and rock sample strings. Samples are placed in sealed bags and shipped directly to ALS CHEMEX labs in North Vancouver, BC for gold fire assay and ICP multi element analyses. The technical content in this news release was read and approved by Roger March, P.Geo., a professional geologist registered in the Province of Newfoundland & Labrador and a qualified person as defined by NI 43-101.

The Borosi gold-copper concessions cover approximately 71,000 hectares within the historic Mining Triangle of Nicaragua. The concessions are subject to an option agreement, whereby B2Gold may earn an initial 51% in the Borosi concessions by completing C$8 million in exploration expenditures over a period of three years. The Borosi exploration budget through July 2010 is C$2.5 million, with Calibre acting as operator.

Calibre Mining Corp. is an aggressive, well financed, TSX Venture Exchange listed company (TSX.V: CXB) that is focused on the acquisition, exploration and development of gold and copper deposits in Central America. Major shareholders of Calibre include gold producers Yamana Gold Inc. and Kinross Gold Corp.

Calibre Mining Corp.
Signed "Robert Brown"

Robert D. Brown, B.Sc., MBA
President and CEO


For further information contact:
Joyce Musial -- Vancouver, Canada
604 681 9944
www.calibremining.com

Neither 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

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, silver or copper, 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 Mining Corp. 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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