Eastside

Exploration

MetresFeet
20232,4007,874
202211,25736,932
20213,67912,070
20193,17010,400
20188,26527,116
20172,9389,639
201617,45557,267
201512,46440,892
20135,36717,608
20112,1487,047
Total69,143226,847

Columbus Gold completed the Phase I drilling program in early 2011 consisting 12 holes totaling 2,125 m (7,405 ft). The best result was in drill hole ES-4 which intersected 13.6 m of 2.42 g/t Au at a depth of 157.6-171.2 m (45 ft of 0.070 opt Au from 520-565 ft), including 6 m of 5.17 g/t from 165.2-171.2 m (20 ft of 0.151 opt from 545-565 ft) and 1.5 m of 12.90 g/t from 166.7-168.2 m (5 ft of 0.337 opt from 550-555 ft). The gold zone drilled in hole ES-4 was interpreted to be open in all directions. Please refer to May 17, 2011 news release highlighting all drill assays.

Phase II drilling in 2013 encountered significant gold mineralization, including 27 meters (88.5 feet) of 1.82 g/t gold within a wider 53.4 meter intercept grading 1.108 g/t gold, in hole ES-14. ES-14 also cut 12.2 meters (40 feet) of 54.1 g/t silver (1.59 opt Ag) associated with the gold. Drilling consisted of 12 angle RC holes totaling 2,391 meters (7,890 feet) and was designed to follow up on the discovery by Columbus Gold in 2011, which cut 13.6 meters (44.6 feet) of 2.42 g/t gold (including 6 meters of 5.17 g/t gold), in hole ES-4.

Drill holes ES-13, 14, 19 and 21 cut the same zone of gold/silver mineralization but closer to surface than discovery hole ES-4 where the zone exceeded 30 meters in thickness and averaged from 0.8 g/t to 1.8 g/t gold at about 76 to 168 meters (250 to 550 feet) of vertical depth. The drilling to date indicates this zone is continuous over at least 330 meters (1,080 feet) of strike, and remains open to depth and to the surface, and in all directions except to the north. Notably, silver mineralization is associated with the gold in ES-14, 19, 20, and 21.

A drill hole location map, and an assay summary from the 2013, Phase II drill campaign can be viewed at the links below:

Map - Phase II Drill Program
Assays - Phase II Drill Program

A Phase III drill program, consisting of 2,944 meters (9,715 feet) was completed in Q4, 2013, with all drill results released in Q1, 2014. The program was designed to extend the gold mineralization encountered in Phase II. The program included some deeper drilling at approximately maximum hole depths of 305 meters (1,000 feet).

A drill hole location map, and an assay summary from the 2013, Phase III drill campaign can be viewed at the links below:

Map - Phase III Drill Program
Assays - Phase III Drill Program

Drilling in Phase III also returned the following positive results:

  • ES-27: 64 m (210 ft) of 1.43 g/t gold, including 8 m (26 ft) of 5.86 g/t gold.
  • ES-36: 48.8 m (160 ft) of 0.92 g/t gold, including 28 m (92 ft) of 22.5 g/t silver within the gold intercept.


On September 22, 2015, Columbus announced results for 51 widely spaced holes (12,298 meters), most of which completed or hit the intended target, intersected gold mineralization, and returned significant gold results. 17 of the holes bottomed in gold. Significant results include 152.4 meters of 0.71 gpt gold, including 28.9 meters of 2.16 gpt gold.

A drill hole location map, cross sections, and an assay summary from the 2015 Phase IV drill campaign can be viewed at the links below:

Map - Phase IV Drill Program
Assays - Phase IV Drill Program
Cross sections - At 40 meter intervals through the main mineralized area
Cross sections - At 120 meter intervals with geology
Assays - Comprehensive results (at September 22, 2015)

On August 30th, 2016, Columbus announced the conclusion of its 2016 drilling program, having completed 17,500 meters (57,413 feet) of drilling, including 12,663 meters (41,544 feet) of reverse circulation rotary drilling and 4,837 meters (15,869 feet) of diamond core drilling. To present, a total of 37,311 meters (122,411 feet) of drilling in 136 holes has been completed at Eastside and forms the basis of the maiden resource for the Original Zone announced December 5, 2016.

Drilling results to date has identified:

  • Better-grade gold mineralization grading 0.75 to 2.0 g/t gold overall but containing narrower higher-grade zones (up to 3.3 m of 9 g/t) associated with faults.
  • Lower grade disseminated mineralization irregularly distributed in breccias and silicification referred to as "cloud" mineralization grading from 0.12 to 0.5 g/t gold.
  • The better-grade mineralization, along the faults, cuts through the broad area of "cloud" mineralization identified by surface mapping, sampling, and drilling.

Andy Wallace is a Certified Professional Geologist (CPG) with the American Institute of Professional Geologists and is the Qualified Person under NI 43-101 who has reviewed and approved the technical content of this project description. Mr. Wallace is the President of Columbus Gold and the principal of Cordilleran Exploration Company ("Cordex"), which is conducting exploration and project generation activities for Columbus Gold on an exclusive basis.

Allegiant Gold Ltd.

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