La Luna
OverviewThe 100% Calibre owned La Luna deposit is located in the Eastern Epithermal Camp of the Borosi concessions. The project sits within the Rosita district and is accessible by a well travelled gravel road. Small scale historic production is reported from the La Luna mine. The deposit lies 8½ kilometers directly southeast of Calibre's 100% owned Riscos de Oro low sulphidation epithermal vein system.In 2011, Calibre announced and released its first resource calculation at La Luna. Using a 0.6 g/t AuEq cutoff, the La Luna deposit is estimated to host 127,700 ounces of gold and 1,143,570 ounces of silver (145,620 ounces of gold equivalent) within 2.539 million tonnes grading 1.56 g/t Au and 14.01 Ag. The La Luna vein system is situated at the south end of a 10 kilometre by 12 kilometre area of epithermal gold-silver bearing veins within the Borosi concessions. It is characterized by a northwest trending low sulphidation epithermal gold - silver quartz vein that was delineated at surface over a distance of two kilometres through a soil sampling and trenching program in 2009. A Phase I diamond drilling program was completed in early 2010.
Inferred Resource at La Luna The La Luna resource was calculated using data from 2,159 metres of HQ diamond drill core in 11 holes and 280 metres of surface trenching over a 1½ kilometer strike length. The deposit is dissected into northern and southern zones that are separated by 350 metres of offset. Further exploration of the La Luna deposit will focus along the southern strike extent of the deposit, as well as on the inferred dilation zone between the north and south zones. The La Luna gold-silver deposit remains open for resource expansion along strike and to depth. A summary of the inferred resource calculations at different grades for the La Luna depositis summarized below:
A copy of the complete report as filed on SEDAR is available below:
Exploration at La Luna In late 2009, Calibre completed 8.4 line kilometers of infill soil sampling that when combined with historic soil data, outlined a 2,200 metre anomalous gold-in-soil trend that bisects the concession. Mineralization along this epithermal vein trend was defined by 23 rock grab samples returning an average gold grade of 5.6 g/t Au with one sample grading 55.4 g/t Au. In addition to gold, rock samples contained an average silver grade of 7.5 g/t Ag and up to 436 g/t Ag. Following the initial mapping and surface sampling campaign, Calibre conducted a trenching program on the La Luna project during January and February of 2010. A total of seven trenches totaling 174 metres were excavated along the north portion of the La Luna vein. The table below summarizes the results of the trenching program.
Highlights from the trenching program include trench BTR10-009 which intersected 18.2 metres of 1.00 g/t Au, including 4.20 metres grading 3.49 g/t Au. Trench BTR10-011 intersected 3.2 metres of 3.92 g/t Au and 1.30 metres of 3.36 g/t Au in two separate quartz veins. The trenches were hand dug to an average depth of one metre and a width of two metres. Click to Enlarge
Exploration at La Luna The Phase I drilling program conducted by Calibre consisted of 11 holes drilled between April and July 2010. Drilling was completed by Rodio Swissboring Guatemala, S.A. all holes were drilled HQ with all drill runs 3.04 metres in length. The program was designed to test a zone of gold-bearing epithermal quartz veins and quartz breccias delineated through a soil sampling and trenching program (discussed below). The drilling also tested the depth extent of a zone associated with an historical small open cut which assayed 3.5 g/t gold over 12.6 metres. Calibre announced the final diamond drilling assay results from its Phase I program at La Luna on August 19, 2010. The results are summarized as follows:
2010 Drilling Highlights Drilling below the small open cut at the southern end of La Luna returned 5.88 g/t Au and 50.16 g/t Ag over 7.0 metres (LL10-002) and has confirmed mineralization to a depth of 82 metres below surface. A second drill hole (LL10-004) was drilled beneath LL10-002 and successfully intercepted the quartz vein returning 1.63 g/t Au over 6.28 metres at a vertical depth of 110 metres below surface. The first hole completed in the northern zone (700 metres north of LL10-002) returned 1.43 g/t Au and 7.5 g/t Ag over 7.75 metres (LL10-001) at a depth of approximately 100 metres below trench BTR10-009. The strike extent of the La Luna vein was tested by a series of drill holes on 250 metre fences along an 1,100 metre northwest trending ridge. Hole LL10-006, located 1,082 metres north of LL10-002, returned encouraging results of 5.08 g/t Au and 36.65 g/t Ag over 2.0 metres at a depth of 115 metres below surface, while Hole LL10-007 successfully identified two mineralized zones; The upper intersection (15 metres from surface) returned 2.99 g/t Au and 30.66 g/t Ag over 1.75 metres while the second intercept (100 metres vertical depth) returned 2.40 g/t Au over 3.35 metres. Click to Enlarge
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