Dr. Marc-Antoine Audet reports
SAMA RESOURCES REPORTS ON SRG'S MAIDEN RESOURCE ESTIMATE FOR THE GOGOTA NICKEL-COBALT DEPOSIT 44.9MT @ 1.28% NI AND 0.13% CO
Sama Resources Inc. investment SRG Graphite Inc. has released the maiden resource estimate for its 100-per-cent-owned Gogota nickel-cobalt deposit located in the Republic of Guinea. The mineral resource estimate, prepared by Montreal-based Met-Chem, a division of DRA Americas Inc., includes a pit-constrained inferred resource of 44.9 million tonnes grading 1.28 per cent nickel for a content of 573,040 tonnes and 0.13 per cent cobalt for a content of 59,560 tonnes. The limonitic portion of the deposit also contains 1,166,200 kilograms of scandium.
The highlights of the pit-constrained estimate are as follows:
- 44.9 million tonnes of mineralized weathered material (limonite and saprolite) from surface to 40 metres;
-
1.28 per cent nickel, 0.13 per cent cobalt, 29.4 grams per tonne scandium;
- 38 million tonnes of limonite material grading 0.15 per cent Co for 57,140 t of in situ cobalt;
- Preliminary strip ratio of 0.23.
Mineral resources were based on 51 vertical drill holes carried out over the Gogota deposit in 2012/2013. Thirty-one drill holes were drilled over a 200-metre-by-400-metre grid and the remaining 20 were drilled over a 200-metre-by-200-metre grid.
"The Met-Chem/DRA resource estimate demonstrates the exceptional potential of the Gogota project and reaffirms the tremendous geological potential in the subregion," said Dr. Marc-Antoine Audet, lead geologist and qualified person (QP) for SRG and president and chief executive officer of Sama.
Resource summary
The mineral resource for the Gogota project incorporates assay results from 51 vertical diamond drill holes representing 1,361 metres. Eight hundred samples were sent for analysis in 2013 representing 31 drill holes and the remaining 425 samples representing 20 drill holes were sent for analysis in 2018 for a total 1,225 samples representing all 51 drill holes. The maiden resource is established for the weathered profile of the deposit, from surface to a depth ranging from surface to approximately 40 metres with an average thickness of 22 metres. The surface area of the deposits covers 1.96 kilometres squared.
Core logging and sampling were performed at the company's facility in the village of Gogota. Sample preparation was performed by Veritas Laboratory in Abidjan, Ivory Coast. Pulp samples were delivered to Activation Laboratories Ltd., Ancaster, Ont., Canada. All samples were assayed for nickel, cobalt and all major oxides using peroxide fusion XRF (X-ray fluorescence). Scandium was determined by inductively coupled plasma optical emission spectrometry.
The estimate was prepared using a block model constrained with 3-D wireframes of the principal mineralized domains. Values for nickel, cobalt and scandium were interpolated using inverse-distance (ID) interpolation methodologies on 40 by 40 by two m blocks. A preliminary open-pit optimization algorithm was run on the estimated grade block model to constrain the resources and to support the Canadian Institute of Mining, Metallurgy and Petroleum's (CIM) requirement that mineral resources have reasonable prospects for eventual economic extraction. Only mineralization contained within the preliminary pit shell has been included in the resource estimate.
The base case mineral resource estimate is summarized in the associated table at a cut-off grade of 0.07 per cent Co in the limonite facies of the profile and 0.70 per cent nickel in the transition and saprolite layers together. Sensitivity estimates were conducted at 0.10 per cent Co and 1.0 per cent Ni, and 0.12 per cent Co and 1.2 per cent Ni in limonite and transition/saprolite, respectively. The resource estimate and sensitivities are established with data from boreholes drilled in 2012 and 2013.
BASE CASE MINERAL RESOURCES
Cut-off grade Facies Tonnes Ni Co Sc Fe MgO Ni Co Sc
Mt % % g/t % % t t kg
0.07% Co limonite 38.00 1.20 0.15 31 46.20 0.81 454,500 57,140 1,166,200
0.7% Ni transition 1.34 2.18 0.05 20 17.81 12.30 29,200 650 -
0.7% Ni saprolite 5.55 1.61 0.03 18 13.17 23.90 89,340 1,770 -
total 44.89 1.28 0.13 29 41.27 4.01 573,040 59,560 1,166,200
SENSITIVITY 1: 0.10 PER CENT CO, 1.0 PER CENT NI
Cut-off grade Facies Tonnes Ni Co Sc Fe MgO Ni Co Sc
Mt % % g/t % % t t kg
0.10% Co limonite 33.22 1.25 0.16 31 47.01 0.82 414,800 53,100 1,015,900
1.0% Ni transition 1.24 2.29 0.05 20 17.67 13.06 28,300 600 -
1.0% Ni saprolite 4.69 1.75 0.03 17 13.68 23.92 82,000 1,600 -
total 39.15 1.34 0.14 29 42.09 3.97 525,100 55,200 1,015,900
SENSITIVITY 2: 0.12 PER CENT CO, 1.2 PER CENT NI
Cut-off grade Facies Tonnes Ni Co Sc Fe MgO Ni Co Sc
Mt % % g/t % % t t kg
0.12% Co limonite 28.58 1.27 0.17 31 47.64 0.77 363,400 47,900 875,800
1.2% Ni transition 1.16 2.36 0.05 19 17.60 13.57 27,500 600 -
1.2% Ni saprolite 4.05 1.85 0.03 17 14.11 23.74 74,900 1,400 -
total 33.79 1.38 0.15 29 42.58 3.97 465,800 49,800 875,800
Notes
(1) CIM definitions (May 10, 2014) observed for classification of mineral
resources.
(2) Block bulk densities interpolated from specific gravity measurements taken
from core samples.
(3) Resources are constrained by a Lersch Grossman (LG) optimized pit shell
using MineSight software.
(4) Pit shell defined using 30-degree pit slope, $5.50 (U.S.)/pound Ni, $30
(U.S.)/pound Co, nil/gram scandium, $2 (U.S.)/t mining costs, $43 (U.S.)/t
processing costs, $3.50 (U.S.)/t G&A (general and administrative expenses)
and $175 (U.S.)/t for concentrate transportation costs.
(5) Mineral resources are not mineral reserves and have not demonstrated
economic viability. The estimate of mineral resources may be materially
affected by mining, processing, metallurgical, infrastructure, economic,
marketing, legal, environmental, social and governmental factors.
(6) Numbers may not add due to rounding.
(7) Effective date of resource estimate is June 6, 2018.
Qualified person
Met-Chem/DRA's consultant, Schadrac Ibrango, PGeo, was responsible for estimating the mineral resources and has reviewed and approved the contents of this press release. Mr. Ibrango is a qualified person (QP), independent of SRG Graphite, within the meaning of NI 43-101 -- Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators.
About Sama Resources Inc.
Sama is a Canadian-based mineral exploration and development company with projects in West Africa.
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