Roxgold (ROG-V) drills 28.8 m of 29.73 g/t Au at Yaramoko
May 2nd, 2013 - News Release
Roxgold Inc. has released results from metallurgical drilling at its 100-per-cent-owned Yaramoko permit in Burkina Faso.
Highlights:
- 29.73 grams per tonne (g/t) gold over 28.8 metres in metallurgical test hole YRM-13-MET-01;
- 27.62 g/t gold over 7.3 metres in metallurgical test hole YRM-13-MET-05.
"The results from the metallurgical test holes released today are in line with what we expect from the 55 zone," stated Paul Criddle, chief operating officer of Roxgold. "Hole YRM-13-MET-01 provides confirmation as to the continuity of grade over an approximately 25-metre vertical slice through the deposit. Results such as these continue to validate our confidence in the 55 zone, and we look forward to conducting the next phase of testwork as part of our preliminary economic assessment."
DRILL RESULTS
Estimated vertical Depth Depth depth Value
OverHole ID from (m) to (m) (m) (g/t) (m)
YRM-13-MET-01 213.20 242.00 200.00 28.25 28.80
YRM-13-MET-02 DNT
YRM-13-MET-03 DNT
YRM-13-MET-04 66.20 72.30 65.00 3.42 6.10
YRM-13-MET-05 74.00 81.30 70.00 27.62 7.30
Notes: (i) No top cut was applied to the assays. All intercepts are reported as downhole lengths. (ii) DNT -- Did not intersect target.
Metallurgical test drilling commenced in late March and samples gathered from these holes have been dispatched to Canada for phase 2 metallurgical testwork. The work will be conducted on behalf of Roxgold by Met-Solve Laboratories Inc. of Vancouver, B.C.
The metallurgical test holes were intentionally designed to drill downdip on the 55 zone structure in order to gather representative samples of mineralized material for metallurgical testing. Drill hole YRM-13-MET-01 was drilled on Section 9475 and intersected 28.8 metres of mineralized material at approximately 200 metres in vertical depth. The hole did not completely pass through the zone and was terminated in the footwall. Holes YRM-13-MET-02 and -03 were planned to test mineralization at approximately 60 metres to 100 metres. Both holes ended up drilling under the structure and paralleling the 55 zone at 64 degrees and 63 degrees, respectively. The dip angles for holes YRM-13-MET-04 and -05 were flattened to 55 degrees and both intersected the 55 zone structure as planned; estimated true widths on holes MET-04 and MET-05 are 1.7 metres and 1.85 metres, respectively. In total, 980 metres of HQ drill core in five holes were completed for this program.
In total, 170 kilograms of material were collected and dispatched for testwork. This sample material will be split into granite and quartz, and volcanic and quartz domains for testwork. The phase 2 testwork program will consist of the following:
- Hardness and abrasion testing (bond indexes);
- Gravity gold characterization (GRG testing);
- Grind sensitivity -- cyanide (whole ore) leaching;
- Diagnostic leaching tests;
- Settling and reagent consumption tests.
Results from these tests will feed into Roxgold's preliminary economic assessment study that is scheduled to be completed in the third quarter of 2013.
Qualified person
Pierre Desautels, PGeo, of AGP Mining Consultants Inc., a qualified person within the meaning of National Instrument 43-101, who is an independent consultant to the company, has verified and approved the data disclosed in this release. This includes the sampling, analytical and test data underlying the information.
Quality assurance/quality control
Drill holes reported in this press release were drilled using HQ diamond drill bits. Company personal are located at the drill site. Contractors and employees of Roxgold conducted all logging and sampling. The core was logged, marked up for sampling using standard lengths of two metres outside of the zone and adjusted to lithological contacts up to one metre within the zone. Samples are then cut into equal halves using a diamond saw; one-half was then quartered and sent for assay at Actlabs Ouagadougou, with quality-assurance/quality-control samples inserted routinely. The remaining three-quarters of the HQ core was then packaged in sealed plastic bags and sent to Roxgold's Ouagadougou office before being shipped to Canada with DHL. Samples received at Actlabs in Ouagadougou are first crushed up to 90 per cent, passing two millimetres. A 300-gram split is then pulverized to 95 per cent, passing 150 mesh (preparatory code RX1). A 1,000-gram split is pulverized for samples located within the mineralized zone (preparatory code RX1+1.3). All samples are then assayed using procedure code 1A2-50, which is a 50-gram fire assay with atomic adsorption finish. All samples within the mineralized zones or samples grading in excess of five g/t gold are reanalyzed with procedure code 1A4-1000, which is a 1,000-gram screen metallic assay where a representative 500-gram or 1,000-gram sample split is sieved at 100 mesh (150 microns), with assays performed on the entire plus-100-mesh fraction and two splits of the minus-100-mesh fraction.
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