Gold mineralization within the Rosebel deposit is structurally controlled and exhibits similar geological, structural, and metallogenic characteristics to orogenic greenstonehosted gold deposits. Mineralization over the Rosebel property consists of quartz-carbonate tension and shear vein association. Rosebel hosts seven main deposits and several smaller gold occurrences in three mineralized domains. The North domain is formed by two sub-parallel mineralized trends striking WNW-ESE: the southern trend comprises the PC and EPC deposits (and ETR exploration area), while the northern trend includes the KHJZ deposits (and MK exploration area). The mineralized trends are found on both flanks of an anticline exposing the volcanic rock and plunging 35° to the WNW. The volcanic rocks are overlain by the Rosebel Formation to the south, and by the Armina Formation to the North. A regional dextral strike-slip fault exhibiting late normal movement marks the southern limit of the North domain and is closely associated with the mineralization. The South domain includes the MA, RM, and RH deposits. The local geology is characterized by the presence of a volcanic basement overlain by detrital sedimentary rocks of the Rosebel Formation. The MA, RM, and RH deposits are all hosted in the footwall of a major reverse fault striking E-W and which is closely related to the onset of mineralization. The sequence is folded into relatively open and slightly dipping (0 to 15°) east or west folds. Miner ........

The Rosebel operation is conventional truck and shovel, drill and blast, open pit operations. RGM runs an owner operated fleet with subcontractors used as support for auxiliary activities.

The Rosebel drilling fleet consists of a mixed fleet of fifteen drills. Drill and blast parameters vary for each of the pits due to different material types and pit designs. All drill holes are 165 millimetres diameter. All blasting activities onsite are executed by Rosebel Gold Mines (RGM) employees. Holes are loaded with bulk explosive matrix and initiated with non-electric detonators.

Ore movement during blasting is a critical issue for the Gross Rosebe operation. For this reason, blast movement monitors are systematically used when blasting mineralized areas to measure vertical and horizontal displacement which allows for the adjustment of the post-blast ore packets. Blast movement is typically in the order of six metres horizontally and approximately three metres vertically on a nine metre bench, according to current measurements.

In order to improve the definition of the ore zones, the preferred method for grade control is through RC drilling in all pits. RC grade control drilling is planned on a grid spacing pattern of 12 metres x 6 metres using inclined holes. Blast hole sampling is used for grade control in areas where RC grade control drilling is not completed. A fleet of four Shram Buggy rigs is used for RC drilling managed by Major Drilling.

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