projects

LA LUNA



The La Luna deposit is located in the northeastern Borosi concessions and is part of the greater Eastern Borosi Project. The deposit is accessible by a well travelled gravel road from the town of Rosita. Historic production occurred however the exact production numbers can only be estimated. The La Luna mine produced ~5,000 ounces of gold and ~19,000 ounces of silver from a small open pit along a 300 metre section of the southern vein.

The La Luna vein system trends roughly 350°, dips steeply to the west at 80°, and is hosted in a sequence of andesite tuffs and minor porphyritic andesite. Reworked quartz breccias are present indicating that the structure was reactivated multiple times similar to the Riscos de Oro deposit. The principal vein is split into northern and southern sections that are separated by 350 metres of offset. Drilling was initiated in 2010 after a successful trenching program returned consistent gold values highlighted by 3.49 g/t/4.20m (trenching results are summarized below). The drilling in the southern portion of the vein confirmed mineralization to a depth of 110 metres beneath the historic open pit. The vein intercepts were found to be base metal-rich, often containing greater than 20% sulphide (see photos below), with a common mineral assemblage of pyrite, galena, and sphalerite. Drill holes along the northern part of the vein were spaced 250 metres apart and confirmed mineralization to depths of 115 metres below surface. In some sections veins were observed to form distinct upper and lower zones. Vein intercepts were 1.42 metres to 9.00 metres in width.

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 1.5 kilometer strike length. The La Luna gold-silver deposit remains open for resource expansion both along strike and at depth. A large, active, artisanal open pit is located immediately along strike of the southern section of the vein.

A summary of the 2011 inferred resource calculations at different grades for the La Luna deposit is shown below:

Tonnes and Grade   Total Contained Metal
Cutoff Grade 
AuEq (g/t)1
Tonnes Gold
(g/t )
Silver
(g/t )
Au Eq1 
(g/t )
  Gold 
(grams)
Silver 
(grams)
Gold 
(ounces)
Silver 
(ounces)
Au Eq1 
(ounces)
0.2 3,502,000 1.22 11.15 1.40   4,278,990 39,043,660 137,570 1,255,280 157,230
0.4 2,909,000 1.42 12.79 1.62   4,128,990 37,205,660 132,750 1,196,190 151,490
0.6 2,539,000 1.56 14.01 1.78   3,972,160 35,568,870 127,700 1,143,570 145,620
0.8 2,129,000 1.74 15.82 1.99   3,712,700 33,685,310 119,360 1,083,010 136,330
1.0 1,661,000 2.01 19.09 2.31   3,343,430 31,707,900 107,500 1,019,440 123,460

  1. AuEq cutoff equivalent calculated using Wardrop's estimated gold price of US $1,058/oz and silver price of US $16.57/oz.
  2. Mineral resources that are not material reserves do not have economic viability.
  3. Metallurgical recoveries and net smelter returns are assumed to be 100%.


Significant drill intercepts from the 2010 Calibre drilling program

Hole 
ID
From 
(m)
To 
(m)
Interval 
(m)
Gold 
(g/t )
Silver 
(g/t)
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
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
including 116.39 117.05 0.66 7.14 8.66
LL10-009 97.92 100.40 2.48 1.39 21.59
117.62 118.10 0.48 2.54 7.90
121.50 124.60 3.10 1.59 18.45
128.10 128.50 0.40 2.40 60.70
138.55 139.00 0.45 2.75 35.50
149.00 151.00 2.00 1.03 1.20
LL10-010 141.00 142.45 1.45 2.66 27.46
147.51 148.93 1.42 1.32 5.28
LL10-011 248.00 249.55 1.55 2.98 2.67
Drill holes LL10-003, LL10-005, LL10-008 did not contain significant results.


Significant trench results from the 2010 Calibre trenching program.

Trench From (m) To (m) Metres Gold
(g/t Au)
BTR10-009 9.20 13.40 4.20 3.49
BTR10-010 12.30 16.00 3.70 2.25
BTR10-011 8.50 11.70 3.20 3.92
BTR10-011 18.90 20.20 1.30 3.36
BTR10-012 7.80 9.90 2.10 3.11
BTR10-017 7.50 9.80 2.30 1.45



Diamond Drilling 2010
Diamond Drilling 2010
La Luna Section with LL10-004
La Luna Section with
LL10-004
La Luna Section with LL10-006
La Luna Section with
LL10-006
La Luna Section with LL10-007
La Luna Section with
LL10-007
La Luna Drill Hole Locations
La Luna Drill Hole
Locations
La Luna Drill Hole LL10-002
La Luna Drill Hole
LL10-002
La Luna Drill Hole LL10-002
La Luna Drill Hole
LL10-002
La Luna Drill Hole LL10-002
La Luna Drill Hole
LL10-002
La Luna Trenching Overview
La Luna Trenching
La Luna Artisanal pit
La Luna Artisanal pit
La Luna Target
La Luna Target


Mr. Gregory Smith, P. Geo., president & CEO for Calibre Mining is the qualified Person as defined by NI 43-101 and has prepared and approved the technical data and information on this webpage.