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Calibre Mining Corp.: B2Gold Completes Earn Into 51% and Approves Initial $2.0 Million Phase I Exploration Program at Primavera for 2013

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Drilling to the south at Copper Hill has intersected zones of skarn and hornfels similar to the style of mineralization and alteration at the Santa Rita deposit in nearby Rosita which produced over 3 million pounds of copper, 177,737 ounces of gold, and 2,629,720 ounces of silver. Additional drilling may be needed to test for possible skarn deposits which are commonly associated with porphyry systems. The skarn mineralization lies about 1.5 km to the southwest. Additional soil sampling is underway in this area.

The 2013 exploration program for Primavera has a Phase I budget of $2 million. This will fund 1,500 metres of drilling, geophysical interpretation as well as detailed mapping and geological interpretation. The Company is commencing a surface mapping and trenching program to help locate the potential continuation of the main zone beyond the fault."

Drill intercepts from the Phase II drill program include;

---------------------------------------------------------------------------                                           IntervalHole ID            From (m)      To (m)         (m)    Au (g/t)      Cu (%)------------------------------------------------------------------------------------------------------------------------------------------------------PR-12-014              0.00       39.70       39.70        0.09      0.0555               ------------------------------------------------------------                     269.00      275.00        6.00        0.61      0.0212               ------------------------------------------------------------                     330.50      378.00       47.50        0.19      0.0069               ------------------------------------------------------------                     415.30      461.80       46.50        0.16      0.0496---------------------------------------------------------------------------PR-12-015              0.00       52.00       52.00        0.14      0.0305               ------------------------------------------------------------                     241.50      275.00       33.50        0.12      0.1289               ------------------------------------------------------------                     365.00      397.50       32.50        0.11      0.0489               ------------------------------------------------------------                     435.00      517.50       82.50        0.14      0.0532---------------------------------------------------------------------------PR-12-016              0.00      201.35      201.35        0.77      0.3567               ------------------------------------------------------------                      25.20       88.65       63.45        1.09      0.4791               ------------------------------------------------------------                     315.00      325.30       10.30        1.26      0.0025---------------------------------------------------------------------------PR-12-017              0.00       28.30       28.30        0.11      0.0615---------------------------------------------------------------------------PR-12-018             63.30       93.60       30.30        0.07      0.0743               ------------------------------------------------------------                     417.00      472.90       55.90        0.09      0.0413---------------------------------------------------------------------------PR-12-019              2.05      181.50      179.45        0.17      0.1050               ------------------------------------------------------------                     103.50      177.00       73.50        0.22      0.1370               ------------------------------------------------------------                     295.00      420.00      125.00        0.16      0.0795---------------------------------------------------------------------------PR-12-020              0.00       22.00       22.00        0.25      0.0637               ------------------------------------------------------------                     365.00      410.00       45.00        0.11      0.0448---------------------------------------------------------------------------PR-12-021            125.00      330.00      205.00        0.13      0.1007---------------------------------------------------------------------------PR-12-022            171.40      177.40        6.00        0.02      0.9139---------------------------------------------------------------------------PR-12-023              0.00      346.00      346.00        0.23      0.1269               ------------------------------------------------------------                     122.00      206.90       84.90        0.31      0.1591---------------------------------------------------------------------------PR-12-024             65.50       79.75       14.25        0.33      0.0075               ------------------------------------------------------------                     496.55      536.55       40.00        0.21      0.0656               ------------------------------------------------------------                     595.00      613.35       18.35        0.38      0.0530               ------------------------------------------------------------                     653.20      656.70        3.50        6.90      0.0404               ------------------------------------------------------------                     673.00      674.50        1.50       11.95      0.2373---------------------------------------------------------------------------PR-12-025             65.53      129.24       63.71        0.11      0.0407               ------------------------------------------------------------                     104.45      129.54       25.09        0.16      0.0407               ------------------------------------------------------------                     115.40      123.44        8.04        0.25      0.0371               ------------------------------------------------------------                     320.20      325.00        4.80        0.19      0.0540               ------------------------------------------------------------                     385.15      420.55       35.40        0.13      0.0329               ------------------------------------------------------------                     409.20      411.60        2.40        0.54      0.0989               ------------------------------------------------------------                     534.92      547.11       12.19        0.09      0.0521               ------------------------------------------------------------                     560.83      566.93        6.10        0.18      0.1438---------------------------------------------------------------------------PR-12-026             18.29       28.96       10.67        0.24      0.0290               ------------------------------------------------------------                      62.05       68.58        6.53        0.41      0.0700               ------------------------------------------------------------                      92.40      110.20       17.80        0.28      0.0441               ------------------------------------------------------------                      92.40       98.40        6.00        0.64      0.0986               ------------------------------------------------------------                     265.30      267.00        1.70        2.45      0.0404---------------------------------------------------------------------------PR-12-027            142.00      142.95        0.95        0.93      0.0054               ------------------------------------------------------------                     161.50      167.50        6.00        0.19      0.0561               ------------------------------------------------------------                     175.80      223.80       48.00        0.16      0.0379               ------------------------------------------------------------                     175.80      203.25       27.45        0.11      0.0334               ------------------------------------------------------------                     304.60      305.25        0.65        1.95      0.4285               ------------------------------------------------------------                     310.60      504.00      193.40        0.03      0.0372               ------------------------------------------------------------                     535.00      554.50       19.50        0.04      0.0564---------------------------------------------------------------------------PR-12-028            145.50      229.90       84.40        0.01      0.0238               ------------------------------------------------------------                     310.75      312.42        1.67        2.74      0.3840               ------------------------------------------------------------                     332.35      447.00      114.65        0.01      0.0195---------------------------------------------------------------------------PR-12-029              0.00      170.15      170.15        0.04      0.0217               ------------------------------------------------------------                      32.00       55.15       23.15        0.10      0.0283               ------------------------------------------------------------                     189.00      310.00      121.00        0.02      0.0251---------------------------------------------------------------------------PR-12-030              0.00      142.60      142.60        0.05      0.0354               ------------------------------------------------------------                      85.50       97.60       12.10        0.21      0.1016               ------------------------------------------------------------                     186.80      336.70      149.90        0.05      0.0422               ------------------------------------------------------------                     186.80      204.30       17.50        0.13      0.0666               ------------------------------------------------------------                     412.50      420.80        8.30        0.04      0.8083---------------------------------------------------------------------------PR-12-031              0.00       72.00       72.00        0.05      0.0187               ------------------------------------------------------------                     176.75      253.00       76.25        0.04      0.0359               ------------------------------------------------------------                     300.50      489.20      188.70        0.05      0.0286               ------------------------------------------------------------                     363.70      452.63       88.93        0.09      0.0376               ------------------------------------------------------------                     424.65      452.63       27.98        0.20      0.0354---------------------------------------------------------------------------PR-12-032            163.00      377.05      214.05        0.11      0.0177               ------------------------------------------------------------                     163.00      175.50       12.50        0.25      0.0066               ------------------------------------------------------------                     232.00      263.65       31.65        0.24      0.0160               ------------------------------------------------------------                     251.00      262.00       11.00        0.48      0.0151               ------------------------------------------------------------                     254.20      254.85        0.65        2.14      0.0279---------------------------------------------------------------------------

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