Advanced Gold, Copper and Silver Exploration

Mining Triangle, Nicaragua TSX.V: CXB August 2012

FORWARD LOOKING STATEMENTCertain statements in this document constitute “forward looking statements” which may not

be based on historical fact. Such forward looking statements involve known and unknown

risk, uncertainties and other factors which may cause the actual results, performance

or achievements of the Company, or industry results to be materially different from any

future results, performance, or achievements expressed or implied by such forward looking

statements. Such factors include, among others, the following: actual results of exploration and

development activities; the costs and timing of the development of new deposits; future prices

of precious and base metals; accidents; risks inherent in mineral exploration; risks associated

with development, construction and mining operations; restrictions on foreign ownership; the

Company’s history of operating losses and uncertainty of future profitability; uncertainty of

access to additional capital; and environmental liability claims and insurance. This presentation

is not an offer to purchase securities and does not constitute an offering document under

Securities legislation.

STABlE ENViroNMENT: ProliFiC MiNiNG DiSTriCT

» Stable government, with a political environment favorable to mining

» Prolific “Mining Triangle” has produced over 7.9M oz’s of gold

» Calibre and its partners control over 860 km2 of underexplored project area in the region

TEAM AND PArTNErS: EXPEriENCED, SuCCESSFul

» Calibre Mining Proven management with decades of mining and public company experience

» Featherstone Capital Strong history of success. Have created billions of dollars in Shareholder Value

» B2Gold Nicaragua’s largest gold producer with two mines and a strong portfolio of development assets

» Alder Resources Experienced management with focus on exploration in the Americas

Calibre’s Borosi Gold-Copper-Silver Project Mining Triangle of Northeast Nicaragua, Central America

INvESTMENT HIGHLIGHTSNEw DiSCoVEry: PriMAVErA GolD-CoPPEr ProJECT

» Primavera porphyry gold/copper discovery

» Thirteen drill holes completed totaling 3,938m

» Discovery drill hole (Jan. 2012): 261.7m grading 0.78 g/t Au, 0.30% Cu

» Joint Venture with B2Gold. B2Gold(Nicaragua’s largest gold producer) can earn a 51% interest in 322km2 of concessions including Primavera

» Extensive exploration and 10,000 metre phase II drilling program underway (2 rigs total)

» $4.0M program planned by B2Gold for 2012

» 25km2 porphyry gold/copper target area at Primavera

ESTABliShED ProJECTS: ProVEN PArTNErS

» Calibre 100%-owned NI 43-101 Compliant Inferred Resource totaling 835,000 ozs Gold and 4.3 million ozs Silver

» Calibre/Alder NI 43-101 Compliant Inferred Resource totaling 118,000ozs Gold, 2.35 million ozs Silver, 108 million lbs Copper

» 100%-owned Riscos de Oro epithermal gold-silver project: 9,427m delineation drilling completed to date

5CALIBREMINING.COM4 CAliBrE iNVESTMENT hiGhliGhTS

CAliBrE MiNiNG CorP

Greg Smith, P.Geo President & CEO, Director » 25+ years exploration experience with both junior & senior operations; » Involved in successfully outlining 10+ million ounces of gold discoveries.

Paulo Santos, CA Chief Financial Officer » 10+ years experience with public accounting, auditing, and regulatory

compliance

Edward Farrauto, CGA Director » 20+ years experience as CFO and director of public companies; » Founder and director of several public companies;

George Salamis Director » 20+ years exploration, development and operations experience; » President & CEO of Edgewater Exploration Ltd.

Hon. John Reynolds, P.C. Director » 35+ years experience in politics, former Member of Parliament, and a

member of the Queen’s Privy Council for Canada;

» Strategic Senior Advisor at McMillan LLP.

FEAThErSToNE CAPiTAl

Douglas B. Forster, M.Sc., P.Geo Executive Chairman of the Calibre Board » President & CEO of Featherstone Capital Inc. » 30+ years of resource project development, M&A, equity finance and

public company management; » Founder and director of numerous public companies;

Blayne Johnson Lead Director of Calibre Board » 25 years of capital markets experience; » Former VP of First Marathon Securities » Chairman of Featherstone Capital Inc.

EXPERIENCED TEAM PARTNERS

B2GolD

Vancouver based gold producer led by Clive Johnson and Tom Garagan, with two gold mines in Nicaragua and a strong portfolio of development and exploration assets in Nicaragua, Colombia, Uruguay and Namibia B2Gold was founded in 2007 by the former executive and management team of Bema Gold Corporation.

AlDEr rESourCES

Toronto-based junior exploration company with a focus on exploration for base and precious metals in the Americas.

SHARE STRUCTURE issued & outstanding 187,910,918

options 15,605,000

yamana warrants 10,000,000

B2Gold warrants 10,000,000

Fully Diluted 223,515,918

Fully Diluted Cash Position $22,417,250

working Capital ~$5,500,000

SIGNIFICANT SHAREHOLDERS

B2Gold Corp. 10.6%

Management 10.0%

7CALIBREMINING.COM6 CAliBrE TEAM

NICARAGUA: STAbLE, UNDER EXPLORED MINING ENvIRONMENT» Democratic Republic with President Ortega elected to a new 5 year term

in Nov. 2011

» Gold is Nicaragua’s No. 3 export

» Gold has helped Nicaragua’s economy grow by 4% annually in the past year, the highest rate in Central America

» Annual gold production has more than doubled in the past 3 years

» Supportive mining laws, including favourable tax regime

» 25 year exploration and 50 year exploitation permits

» Economist Intelligence Unit ranks Nicaragua as one of the safest countries in Central America

HONDURAS

NICARAGUA

BorosiConcessions

Managua

LakeNicaragua

La Libertad (Gold Mine)B2GOLD CORP.

El Limon (Gold Mine)B2GOLD CORP.

Bonanza(Gold Mine)

Siuna Rosita and Primavera

CaribbeanSea

Pacific Ocean

EL SALVADOR

COSTA RICA

PANAMA

Riscos de Oro

Puerto Cabezas (Airport)

0 20 40 80 120 160km

bOROSI CONCESSION AREA

9CALIBREMINING.COM8 worKiNG iN NiCArAGuA

Cerro Cola BlancaForest Reserve

Prospects

100% Calibre

Calibre-Alder Option Area

Calibre-B2Gold Option Area

Cerro BanacruzForest Reserve

NICARAGUA

Borosi Concessions

Managua

275k

m

0 5 10 15 20km

Siuna

Riscos de Oro

Primavera

Cerro Aeropuerto

Rosita

Minnesota

Santa Rita

Bonanza

La Luna

Bonanza (Gold Mine)2.8M OZS PAST PRODUCTION

LA LUZ (Gold Mine)2.7M OZS PAST PRODUCTION

bOROSI GOLD, SILvER AND COPPER CONCESSIONS – “MINING TRIANGLE”

3

Cerro Cola BlancaForest Reserve

Prospects

100% Calibre

Calibre-Alder Option Area

Calibre-B2Gold Option Area

Cerro BanacruzForest Reserve

NICARAGUA

Borosi Concessions

Managua

275k

m

0 5 10 15 20km

Siuna

Riscos de Oro

Primavera

Cerro Aeropuerto

Rosita

Minnesota

Santa Rita

Bonanza

La Luna

Bonanza (Gold Mine)2.8M OZS PAST PRODUCTION

LA LUZ (Gold Mine)2.7M OZS PAST PRODUCTION

6

2

5

4

1

CAliBrE/B2GolD1 PriMAVErA Gold-Copper

2 MiNNESoTA Gold-Copper

100% CAliBrE

3 CErro AEroPuErTo Gold-Silver Ni43-101 inferred resource 707,750 oz Au 3.14M oz Ag

4 lA luNA Gold-Silver Ni43-101 inferred resource 127,700 oz Au 1.74M oz Ag

5 riSCoS DE oro Gold-Silver 9,427m of drilling completed

CAliBrE/AlDEr rESourCES

6 roSiTA

Copper-Gold-Silver Ni 43-101 inferred resource 108M lbs Cu 118,000 oz Au 2.35M oz Ag

Former open pit copper mine produced 305M lbs Cu

11CALIBREMINING.COM10 BoroSi CoNCESSioNS ArEA

PRIMAvERA GOLD/COPPER PROJECT

ProJECT hiGhliGhTS

» Road accessible with national power grid located 1.2 km from the project, 8km from town of Rosita

» Subdued topography with main land use being subsistence farming and ranching

» Joint Venture with B2Gold: B2Gold can earn a 51% interest in Primavera, as well as 322 sq km of surrounding concessions, by spending $8M by June, 2014 (~$6.0 spent to June 2012). B2Gold may elect, once earn-in is complete, to carry an individual prospect within the concession area through a Preliminary Feasibility Study for an additional 14% interest in the project

» Updated Airborne geophysical survey completed over a large 5km by 5km interpreted intrusive/volcanic complex. Additional ground surveys underway

» 13 drill holes completed totaling 3,938m

» Extensive exploration and 10,000 metre phase II drilling program underway (2 rigs total)

» Primavera is geologically similar to Newcrest Mining Limited’s Cadia-Ridgeway porphyry gold/copper mine in NSW, Australia where underground and open pit reserves contain 23.6M oz Au and 8.3B lbs Cu*

AIRbORNE RADIOMETRIC SURvEY

PriMAVErA GolD-CoPPEr DiSCoVEry

intrusive/Volcanic Complex

Borosi Concessions

0km 20 40

*Newcrest Mining Limited website

13CALIBREMINING.COM12 PRIMAVERA PROJECT

PRIMAvERA GOLD/COPPER PROJECT SOIL GEOCHEMISTRY

GOLD IN SOIL GEOCHEMISTRY

TRENCH RESULTS

Trench iD interval (m) Gold (g/t) Copper (ppm)

PrTr11-005 51.25 1.53 680

PrTr11-010 107.00 0.78 980

PrTr11-011 179.40 0.63 997

PrTr11-012 58.00 0.70 1313

PrTr11-013 49.50 0.25 1100

PrTr11-014 51.70 0.42 1286

HIGHLIGHTS

COPPER IN SOIL GEOCHEMISTRY

» Over 800 m by 300 m gold/copper soil geochemistry anomaly (open)

» Additional gold/copper soil geochem anomalies have been outlined in the 25km2 Primavera porphyry target area

» Trenches returned long intervals of continuous gold/copper mineralization including 179.4m grading 0.63g/t Au and 997 ppm Cu

» Very sparse rock outcrop in region with up to 10m of overburden and saprolite

Borosi Concessions

0km 20 40

15CALIBREMINING.COM14 PRIMAVERA PROJECT

PRIMAvERA GOLD/COPPER PROJECT RESULTS

PRIMAvERA SELECT DRILL RESULT HIGHLIGHTS*

» Gold/copper mineralization has been intersected in drill holes over a 300m by 300m area and to a depth of 300m with mineralization comprised of quartz-magnetite-chalcopyrite-bornite veins and vein stockwork within broad zones of potassically and propylitically-altered intermediate volcanic and intrusive rocks

» $4.0M program planned by B2Gold for 2012

» Primavera is geologically similar to Newcrest Mining Limited’s Cadia-Ridgeway gold/copper mine (23.6M oz Au and 8.3B lbs Cu)

Drill hole From To length Gold Copper AuEq** (m) (m) (m) (g/t) (ppm) (g/t)

Pr-11-001 0.00 276.80 276.80 0.50 2,146 0.84

includes 0.00 103.00 103.00 0.85 3,240 1.36

Pr-11-002 1.5 263.20 261.70 0.78 2,966 1.25

includes 1.5 209.00 207.50 0.89 3,378 1.42

includes 74.50 209.00 134.50 1.01 3,561 1.57

Pr -11-003 4.00 327.20 323.20 0.41 1,843 0.70

includes 4.00 150.50 146.50 0.65 2,742 1.08

Pr-12-005 207.50 372.50 165.00 0.31 1,713 0.58

Pr-12-006 12.00 102.00 90.00 0.21 1,315 0.42

Pr-12-007 7.70 255.00 247.30 0.22 1,097 0.39

includes 156.00 197.00 41.00 0.34 1,760 0.62

Pr-12-008 107.65 280.00 172.35 0.48 2,401 0.86

includes 131.50 187.00 55.50 0.67 3,507 1.22

includes 187.00 280.00 93.00 0.41 1,978 0.72

includes 280.00 382.50 102.50 0.23 1,139 0.41

Pr-12-10 79.00 94.40 15.40 0.59 4,325 1.27

Pr-12-11 6.95 166.48 159.53 0.46 2,008 0.78

includes 6.95 95.65 88.70 0.53 2,225 0.88

Pr-12-013 24 46.5 22.5 0.44 2,090 0.77

**AuEq (g/t) Gold Equivalent calculated using 1,300/oz gold and $3.00/lb copper and metallurgical

Note: Holes 1-3 released Jan. 20, 2012, Holes 4-10 released April 16, 2012 and holes 11-13 released June 28, 2012

PRIMAvERA DRILL PLAN

*Complete drill results available on Calibre Mining’s website

recoveries and net smelter returns are assumed to be 100%

Borosi Concessions

0km 20 40

17CALIBREMINING.COM16 PRIMAVERA PROJECT

PR11-002 INTERCEPTED:

» 261.70m grading 0.78 g/t Au, 0.30% Cu

» Continuos Gold-Copper Mineralization

PR12-008 INTERCEPTED:

» 247.35m grading 0.43 g/t Au, 0.21% Cu including 172.35m grading 0.48 g/t Au, 0.24% Cu

PR12-011

» 159.53m grading 0.46 g/t Au, 0.20% Cu including 88.7m grading 0.53 g/t Au, 0.22% Cu

PRIMAvERA GOLD/COPPER PROJECT DRILL HOLES PR11-002, PR12-008, PR12-011

Au (g/t)

Cu (%)

PR12-008 INTERCEPTED:

» 172.35m grading 0.48 g/t Au, 0.24% Cu

PICTURED DRILL INTERCEPT ASSAYED

» 5.52m @ 0.59g/t Au and 0.29% Cu (Section 196.93m-202.45m of hole Pr12-008)

DRILL HOLE PR12-008

Borosi Concessions

0km 20 40

*PR12-008/011 were analyzed at Inspectorate Labs in Vancouver

PR-12-008

PR-11-002PR-12-011

261.70m grading 0.78 g/t Au, 0.30% Cu

159.53m grading 0.46 g/t Au, 0.20% Cu

247.35m grading 0.43 g/t Au, 0.21% Cu

19CALIBREMINING.COM18 PRIMAVERA PROJECT

PRIMAvERA PORPHYRY GOLD/COPPER MINERALIzATION - DISTRICT POTENTIAL

25 KM PORPHYRY GOLD/COPPER

TARGET AREA

2

Copper Hill

Primavera

Santa Juana

San Francisco

District Exploration Potential» Lidar Survey Completed» Airborne geophysical survey underway» Soil geochem grids expanded» IP survey planned

PORPHYRY SYSTEMS ARE KNOWN TO

OCCUR IN CLUSTERS

21CALIBREMINING.COM20 PRIMAVERA PROJECT

MINNESOTA PORPHYRY GOLD/COPPER MINERALIzATION POTENTIAL

GOLD IN SOIL GEOCHEMISTRY COPPER IN SOIL GEOCHEMISTRY

Borosi Concessions

0km 20 40

» located 20 kilometres northwest of the Primavera gold-copper project

» successfully outlined porphyry-style mineralization delineated over 1.75km by 1.25km

» 500m by 250m gold and copper soil anomaly

» 339.5 metres of face sampling of artisanal workings

» detailed geological mapping over 15 square kilometres and reconnaissance geologic mapping over 52 square kilometres

TRENCH RESULTS

Trench iD interval (m) Gold (g/t)

BrTr11-044 6.40 5.56

BrTr11-047 8.00 6.35

BrTr11-053 4.65 1.51

BrTr11-054 6.00 2.12

BrTr11-057 12.80 1.27

HIGHLIGHTS

22 23CALIBREMINING.COM CALIBREMINING.COMMiNNESoTA ProJECT

HONDURAS

NICARAGUA

Caribbean Sea

Pacific Ocean

EL SALVADOR

BELIZE

COSTA RICA

PANAMA

PRIMAVERAPorphyry Gold-Copper Project

CERRO COLORADO24.8 B lbs Copper, 3.5M ozs Gold

COBRA PANAMA19.6 B lbs Copper, 4.9M ozs Gold

Deposit Tonnes Au Cu Au Eq. Contained Au Contained Cu (Mt) (g/t) (%) (g/t)* (Million ozs) (Billion lbs)

Cerro Casale 1,200 0.59 0.22 0.94 23.1 5.78

Chapada 429 0.24 0.26 0.65 3.1 2.15

El Morro 537 0.49 0.52 1.31 8.2 6.08

Agua rica 908 0.22 0.49 1.00 22.1 9.78

Maricung 269 0.70 0.00 0.70 6.0 0.00

Alumbrera 390 0.51 0.47 1.25 6.4 4.03

Kemess South 109 0.71 0.23 1.07 2.5 0.56

Mt. Milligan 531 0.34 0.20 0.66 6.0 2.12

Cobra Panama 2,143 0.07 0.41 0.72 4.9 19.59

Cerro Colorado 1,400 0.08 0.78 1.31 3.5 24.00

Cadia-ridgeway 1,290 0.58 0.30 1.06 23.6 8.30

Primavera** - 0.61 0.25 1.01 - -

SELECTED PORPHYRY GOLD/COPPER DEPOSITS/MINES

* Au Eq. (g/t): Gold Equivalent calculated using $1,300/oz gold and $3.00/lb copper and metallurgical recoveries and net smelter returns are assumed to be 100%.

** weighted average grade of Pr-11-001, Pr-11-002, Pr-11-003 and Pr-12-008

resource information derived from website Sources.

25CALIBREMINING.COM24 SElECTED PorPhyry GolD/CoPPEr DEPoSiTS/MiNES

RISCOS DE ORO PROJECT DISTRICT POTENTIAL 100% CAliBrE owNED

» Low Sulfidation Epithermal Gold-Silver Vein District

» Comparable to nearby Bonanza Camp in geology, mineralization, and structure (past production of +2.8 million ozs Au)

» Gold – Silver System extends over 7 km from the El Paraiso and Murcielago targets Northeast towards Riscos de Oro

» Completed 9,427m of resource delineation drilling at Riscos in 37 holes with epithermal gold-silver intercepts including 7.69 g/t Au, 211.80 g/t Ag over 10.6m

» Historic trenching at Murcielago adit 7.0 Km SW of Riscos returned 12.4 g/t Au over 3.0 metres

» Multiple parallel veins identified

DRILLING DETAILS» 9,427m of delineation drilling completed

» Former open pit and underground mine to 90m depth only

» Gold-Silver mineralization defined over 725m strike length to a depth of 300m

» Multiple mineralized veins and structures

DRILLING HIGHLIGHTS» rD11-012: 7.69 g/t Au, 211.80 g/t Ag over 10.6m

» rD11-010: 10.25 g/t Au, 288.25 g/t Ag over 5.4m

» rD10-009: 4.23 g/t Au, 384.86 g/t Ag over 8.53m

Borosi Concessions

0km 20 40

historical Trench:12.43g/t Au, 93.00g/t Ag over 3.0M

27CALIBREMINING.COM26 riSCoS DE oro ProJECT

A

A1

NI 43-101 GOLD/SILvER RESOURCES AT CERRO AEROPUERTO AND LA LUNA 100% CAliBrE owNED

CErro AEroPuErTo Drill holES

Borosi Concessions

0km 20 40

lA luNA Drill holES

Borosi Concessions

0km 20 40

la luz Mine

1. * Au Eq cutoff equivalent calculated using Wardrop’s estimated gold price of US$1,058/oz and silver price of US$16.57 /oz2. Mineral resources that are not mineral reserves do not have economic viability3. Metallurgical recoveries and net smelter returns are assumed to be 100%

1. Base case is reported at a 0.15% copper equivalent cut-off grade which incorporates consideration of mining and processing cost, recoveries, commodity prices and selling cost.2. Estimate assumes a long term copper price of US$2.90/lb, a gold price of US$1,200/oz and a silver price of US$24/oz.3. Rounding as required by NI 43-101 reporting guidelines may result in apparent summation differences.

4. Tonnage and grade measurements are in metric units. Contained gold and silver ounces are reported as troy ounces, contained copper pounds as imperial pounds.

5. Mineral resources that are not mineral reserves do not have demonstrated economic viability. The estimate of mineral resources may be materially affected by environmental, permitting, legal, title, taxation, sociopolitical, marketing, or other relevant issues.

6. The quantity and grade of reported inferred mineral resources in this estimation are uncertain in nature and there has been insufficient exploration to define these inferred mineral resources as indicated or measured mineral resources and it is uncertain if further exploration will result in upgrading them to indicated or measured mineral resources.

Calibre Mining Corp. and Alder resources inferred resource (using a 0.15% Copper cutoff grade)

Tonnes and Grade Total resources

Deposit Tonnes Gold Silver Cu Gold Silver Cu (g/t) (g/t) (%) (oz) (oz) (lbs)

rosita Stock Piles 7,950,000 0.46 9.20 0.62 118,000 2.35M 108M

NI 43-101 COPPER/GOLD/SILvER RESOURCES AT ROSITA JoiNT VENTurE wiTh AlDEr rESourCES

Calibre Mining Corp. inferred resource (using a 0.6 g/t AuEq cutoff grade)

Tonnes and Grade Total ounces

Deposit Tonnes Gold Silver Au Eq1 Gold Silver Au Eq1 (g/t) (g/t) (g/t) (oz) (oz) (oz)

Cerro Aeropuerto 6,052,000 3.64 16.16 3.89 707,750 3,144,500 757,000

la luna 2,539,000 1.56 14.01 1.78 127,700 1,143,570 146,000

835,450 4,288,070 903,000

29CALIBREMINING.COM28 CErro AEroPuErTo AND lA luNA ProJECTS

FORMER SANTA RITA COPPER-GOLD MINE CAliBrE/AlDEr oPTioN

» Optioned to Alder Resources; Alder to spend C$4.0 million over the next four years to earn a 65% stake in Calibre’s Rosita D Concession

» Rosita D concession: 3,356 hectares - only 5% of Calibre’s concessions in the Mining Triangle

» Historic open pit Santa Rita copper-gold mine: total historic production from skarn mineralization estimated at 305 M lbs of Cu, 177,737 ozs of Au, and 2,629,720 ozs of Ag from 5,924,572 tons of ore (Arengi, 2002)

» On May 9, 2012 Alder Resources Announced a NI 43-101 Inferred Resource estimate of 7.95 Mt averaging 0.62% Cu, 0.46 g/t Au, and 9.2g/t Ag. Containing 108 M lbs copper, 118,500 oz gold and 2.35 M oz of silver

» Phase One exploration commenced, including 8,000 metres of diamond drilling

Borosi Concessions

0km 20 40

31CALIBREMINING.COM30 CAliBrE/AlDEr oPTioN

SUMMARY» Nicaragua provides a favorable, stable, environment

for mining.

» The ‘Mining Triangle’ has proven potential and is under-explored.

» Calibre Mining, Featherstone Capital, B2Gold, and Alder Resources are an established, experienced team who control over 860 km2 of underexplored territory in an area that has already produced more than 7.9M oz’s of gold.

» New porphyry gold-copper discovery at Primavera with district potential.

» With up to $7 million in exploration carried by partners, Calibre is able to rapidly advance its opportunities in the Mining Triangle.

EXPLORATION TIME LINE & NEWS FLOW

INFORMATIONMark Carruthers Manager, investor relationscalibre@calibremining.com (604) 681.9944

Calibre Mining Corp. 1620 – 1066 west hastings St. Vancouver, BC V6E 3X1

TSX.V: CXB

calibremining.com

2012 Q1 Q2 Q3 Q4

Exploration for Porphyry Gold/Copper Systems

Calibre/B2Gold option 100% Calibre owned concessions

Target Delineation Drilling

Primavera / Calibre/B2Gold rosita Copper Project / Calibre/Alder resources option

Data reviewriscos de oro / Cerro Aeropuerto / la luna / 100% Calibre

rESulTSDrill results from Santa rita and Primavera + regional porphyry gold/copper exploration and drill programs

3332

Calibre Mining Corp. 1620 – 1066 west hastings St. Vancouver, BC V6E 3X1

TSX.V: CXB

calibremining.com