Engineering & Mining Journal

AUG 2018

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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REGIONAL NEWS - EXPLORATION ROUNDUP 26 E&MJ • AUGUST 2018 www.e-mj.com Hummingbird Initiates Extensive Drill Campaign at Yanfolila in Mali Hummingbird Resources has initiated an extensive exploration drill campaign on its Yanfolila mining permit in Mali, targeting conversion of resources to re- serves and extension of mine life at the Yanfolila mine. Four rigs were on-site as of early July and will be drilling more than 50,000 meters (m) across six known de- posits, all in close proximity to the Yanfo- lila processing plant. Hummingbird's exploration drill strat- egy is focused on infilling currently de- fined resources at the six deposits in the 2.2-million-ounce (oz) resource base. By targeting these resources, Hummingbird anticipates that the current mine life will ultimately be extended beyond 10 years, and, at certain stages in the life-of-mine plan, grade delivered to the process plant will be improved. This could result in higher annual production levels and im- prove projected annual free cash flow. The Gonka Gonka deposit 5 kilome- ters (km) from the Yanfolila process plant is budgeted for 20,000 m of drilling, testing an opportunity to substantially increase Yanfolila mine life and improve the mill feed grade through the later years of the current mine plan. Using a phased approach, in-pit resources will be drilled out first before commencing deeper drill- ing targeting underground resources. Fur- ther and substantial reserve and resource growth is considered to exist at Gonka down dip of the current known resources. Other drilling will include 10,000 m at the Guirin West deposit less than 2 km from the process plant to quickly define further oxide resources that will supple- ment the fresh ore currently being mined from Komana East; 5,000 m at the Koma- na West deposit 3 km west of the process plant; 10,000 m at Sanioumale West along strike of Guirin West; and 10,000 m at Sanioumale East along strike and north of Komana East and Gonka. (hummingbirdresources.co.uk) Exploration Briefs B2Gold has increased its 2018 Mali ex- ploration budget from $15.1 million to $19 million to accelerate its current Fe- kola North Extension Zone drill program, which is extending and infilling mineral resources to the north of the main Feko- la deposit. The number of diamond drill rigs is being increased from five to eight, along with one reverse circulation rig and one aircore rig. As of late June, a total of 39,000 m had been drilled on the Fekola North Ex- tension during 2018, and an additional 16,000 m are planned for the remainder of the year. Exploration drilling of the Fekola North Extension has extended miner- alization over 1 km north of the Fekola reserve pit boundary. The drilling to date indicates that the high-grade mineralized shoot in the Fekola reserve deposit not only continues to be well mineralized over 1 km to the north, but also has been in- tersected closer to surface than originally projected. These and previous drill results indicate that potential exists, subject to further drilling, to significantly increase open-pit resources and reserves north of the current Fekola open-pit reserve. The Fekola North Extension remains open to the north. The Fekola mine, which poured its first gold on October 7, 2017, is fore- cast to produce between 400,000 oz and 410,000 oz of gold in 2018. (www.b2gold.com) Constantine Metal Resources has report- ed the first round of assay results from a 10,000-m drill program currently under way at its Palmer joint-venture project in southeast Alaska. Wide intervals of sil- ver-gold-zinc-lead-barite mineralization have been intersected in the first two drill holes located 150 m along strike to the southeast of the previously reported AG Zone discovery, increasing the total strike length to 350 m. Highlights include 4.8 m grading 436 g/metric ton (mt) silver, 1.3 g/mt gold, 3.6% zinc, and 1.6% lead and 43.3 m grading 143 g/mt silver, 0.5 g/mt gold, 6.5% zinc, and 2.5% lead. Palmer is a high-grade volcanogenic massive sulphide deposit, with an in- ferred mineral resource of 8.1 million mt grading 1.41% copper, 5.25% zinc, 0.32 g/mt gold, and 31.7 g/mt silver. The proj- ect is being advanced as a joint venture between Constantine (51%) and Dowa (49%), with Constantine as the operator. The project is located in an accessible part of coastal southeast Alaska, with road access to the edge of the property and within 60 km of the year-round deep- sea port of Haines. "This is an exceptional start to our 2018 drill program at Palmer," Constan- tine President Garfield MacVeigh said. "The intersections are major step-outs to our 2017 AG Zone discovery and confirm significant size potential. We are partic- ularly pleased with the very strong silver and gold contribution to the base metal values and the substantial widths." (constantinemetals.com) Bluestone Resources has reported ongoing positive drill results from its resource defi- nition drill program at its previously mined Cerro Blanco gold project in Guatemala. Highlights include the following intercepts representing true widths of the veins: 9.6 g/mt gold and 34.9 g/mt silver over 21.4 m, 11.5 g/mt gold and 48.6 g/mt silver over 12.9 m, and 7 g/mt gold and 65.2 g/ mt silver over 17.2 m, including 17.5 g/ mt gold and 197 g/mt silver over 4.1 m. These latest results reaffirm a new geological model developed by Bluestone, where broad widths of high-grade miner- alization occur due to multiple quartz-ad- ularia veins converging at depth, possibly representing a feeder structure. Visible gold can be observed associated with zones of dark grey quartz and acanthite within these high-grade vein intercepts. "We continue to be very pleased with the results from the feasibility drilling program," Bluestone President and CEO Darren Klinck said. "As a result, we have enhanced our confidence in the continui - ty of the high-grade veins, and the geolog- ic model has been transferred to the mine design team as part of the mine planning activities for the feasibility study." (www.bluestoneresources.ca)

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