Drilling at the Gross Rosebel project in Suriname has enabled Cambior (CBJ-T) and Golden Star Resources (GSC-T) to expand reserves.
The partners are in the midst of a 35,000-metre drill program aimed at blocking out reserves on the property in preparation for a final feasibility study next year.
At the Pay Caro deposit, stepout drilling has extended the known mineralization 250 metres eastward and 200 metres westward along strike. At both Pay Caro and East Pay Caro, infill drilling on 50-metre line spacings has encountered new mineralized zones, which may allow for a wider open pit.
Gold grades in the new intersections largely fall in the range of 1-4 grams per tonne.
The drill holes also cut several deeper intersections at Pay Caro and East Pay Caro, with grades of 1 gram to 8 grams gold per tonne, and these might be suitable for underground mining.
The companies have been carrying out delineation drilling at the Koolhoven and Bigi Asanjangmoni prospects, also on the Gross Rosebel property, and additional infill drilling will be required before the mineralization can be brought into reserves. Grades in these zones are comparable with those in the Pay Caro and East Pay Caro deposits.
Golden Star’s 70%-owned subsidiary, Guyanor Ressources (GRL.B-T), has finished a first phase of drilling at the Michel zone on its St.-Elie property, 100 km west of Cayenne, French Guiana. The project is a joint venture with the French Guianese unit of Asarco (AR-N).
Surface hydraulic mining in the 1940s exposed a 1,200-by-200-metre area of quartz veins in sheared volcanic rocks. Drilling on the strike extensions of the shear zone has intersected silicified volcanic rocks with quartz-carbonate-sulphide veins.
Nine of 11 drill holes intersected mineralization grading more than 0.5 gram gold per tonne. Among the better intersections were an 8-metre length grading 16.2 grams gold per tonne, a 4-metre length grading 10.9 grams, and an 11-metre length grading 4.1 grams.
Guyanor and Asarco plan to drill 17 more holes at Michel; four remaining holes on St.-Elie have yet to be drilled.
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