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Lola Graphite Project – Republic of Guinea, West Africa
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Figure 1: Exploration permits in Guinea
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Lola Graphite property (Permit de Recherche, PR 4543)
The Lola Graphite Project is 100% owned by Sama Resources Guinea SARL and is located within the department of Lola in eastern Guinea, 1,000 km from Conakry, the capital of the Republic of Guinea. The occurrence is within 50 km from the border with Guinea and located 3.5km west of the town of Lola (Figure 1). The exploration licenses, named Permit de Recherche 4543, form an almost square area of 13.6km wide by 13.82km high and is centred on UTM WGS 84 zone 29N latitude 7° 48’ 00’’ (UTM 863,000 N) and longitude 8° 32’ 00’ (UTM 551,000E), (Arrêté No A2013/4543/MMG/SGG and Decree No 442 MG/CAB/CPDM/2016). The area includes the communities of Lola and several smaller villages. Within the license area, and in the immediate vicinity of the Lola Graphite occurrence, the terrain is gently undulating providing good access to any part of the property.
Pursuant to Sama’s request in 2012, the Republic of Guinea awarded Sama Resources Guinea SARL, through the Arrété No A2013/4543/MMG/SGG dated September 2, 2013, the Lola Graphite Exploration Permit for a first period of three years’ renewable for two additional periods of 2 years each. The Company submitted the first renewing documentation with the Department on Mine on June 20, 2016 and the Exploration Permit was renewed for the first period of two years on August 29, 2016, Decree No 442 MMG/CAB/CPDM/2016 and per legislation, the surface area was reduced by 51% from 380km2 to 187km2
Exploration Update
The Lola Graphite deposit is present at surface over 8.7 kilometers with an average width of 300, and up to 1,000 meters wide (Figure 2). The first 20 meters or so of the deposit are well weathered (lateralized), freeing graphite flakes from the silicate gangue and allowing for an easy grinding with optimal recovery of all large and jumbo flakes. The graphite mineralization continues at depth within the non-weathered sheared gneiss.
The graphite mineralization is well exposed at surface on its entire strike length with sample grades ranging from trace to up to 20% of large flakes and often seen in higher concentration agglomerates.
A total of 36 core drill holes for 800m were drilled at the Lola Graphite deposit. Holes were scattered unevenly over a strike length of 5.2km of the entire 8.7km long deposit. Drilling was performed using a Jacro 175 core drill rig owned by Sama and capable to reach a depth of between 20m and 40m from surface (Figure 3).
Three metallurgical tests were performed at the Activation Laboratory (Actlab), Ontario, Canada in 2014, 2015 and 2016. In 2014, the first test was performed on the two of Lola’s prominent mineralized facies, the oxide material and the underlying non-oxide material (below 20 meters) while tests performed in 2015 and 2016 exclusively focused on the surface oxide material (weathered profile).
The first 20m or so (weathered material) of the deposit is well lateralized freeing graphite flakes from the silicate gangue and allowing for easy mining and grinding with an optimal recovery of large and jumbo flakes. Graphite mineralisation continues at depth within the non-weathered paragneiss.
The oxide material returned global recoveries of 94-96% of graphite flakes producing a graphite concentrate with >90% of large, jumbo and super-jumbo size flakes (Table 1, Figure 4). Super-jumbo flake size accounts for 52% of the concentrate with purities of XXX% graphitic carbon (‘’Cg’’).
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Table 1: Actlab Metallurgical tests results. Subdivision of the jumbo flakes into jumbo and super-jumbo sizes was only performed in 2015 and 2016.
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In 2013, the Company supported M. Sékou Oumar Sow, a Guinean geological student at the University of Franche Conté, France, with his under graduate study. The study aimed at the mineralogical and petrological characterisations of the mineralisation as well as the host rock. The study was under the supervision of Professor Christian Picard.
The graphitic mineralization is hosted within a quartzo-feldspath-biotite-sillimanite rich paragneiss with zircon, monazite and rutile as accessory minerals. Graphite mineralization is present as natural flakes of 0.25 to 1 mm in size. Graphite flakes appears to be cogenetic with biotite and sillimanite. Pyrite and minor chacopyrite are present in the non-oxide paragneiss and totally absent in the oxide material.
To view the technical report on Lola Graphite deposit click here.
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Figure 2: Lola Graphite deposit showing Sama’s shallow Jacro type boreholes.
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Figure 3: Jacro diamond drilling rig in operation at the Lola Graphite (October 2013).
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Figure 4: Comparison of Flake Size Distributions from Various Selected Published Sources. Source: Trillion Minerals LTD.
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