Description
DOWNLOAD AMIS CERTIFICATE (PDF)
Origin of Material
This CRM is made from run-of-mine oxide Cobalt-Copper ore from the Tenke Fungurume (Tenke) mine operated by Freeport- McMoRan Copper & Gold Inc. The mine is situated in Katanga Province of the Democratic Republic of Congo. The Tenke-Fungurume deposits are sedimentary copper deposits located in the Lufilian arc, an 800 km fold belt formed between the Angolan Plate to the southeast and Congo Plate to the northwest during the late Neoproterozic approximately 650 to 600 million years before present (Ma). Copper mineralization at Tenke-Fungurume is stratabound and generally restricted to two dolomitic shale horizons (RSF and SDB respectively) each ranging in thickness from 5 to 15 m, separated by 20 m of cellular silicified dolomite (RSC).
Approximate Mineral and Chemical Composition
The main economic minerals present at Tenke and Fungurume are malachite, chrysocolla, bornite, and hetrogenite; the primary copper and cobalt mineralogy is predominately chalcocite (Cu2S), digenite (Cu9S5) bornite (Cu5FeS4), and carrollite (CuCo2S4); however oxidation has resulted in widespread alteration producing malachite (Cu2CO3(OH)2), pseudomalachite (Cu5(PO4)2(OH)4), chrysocolla (hydrated copper silicate) and heterogenite (Co3+O(OH)).
The primary copper-cobalt mineral associations are homogeneous in both mineralized zones and any variations are due to the effect of oxidation and supergene enrichment. Consequently the mineral assemblages can be grouped into three main categories dependent upon the degree of alteration – oxide, mixed and sulfide zone. Dolomite and quartz are the main gangue minerals present. Dolomite or dolomitic rocks make up the bulk of the host strata. Weathering of the host rocks is normally depth related, intensity decreasing with increasing depth, producing hydrated iron oxides and silica at the expense of dolomite, which is leached and removed.
For a detailed description please refer to the Technical Report prepared for Tenke Mining Corp by GRD Minproc Limited available at:
Certified Concentrations
Analyte Method Certified(µ) Two Standard deviation (2s) ± Unit
Au Pb collection1 0.018 0.01 g/t
Co FUS6 413 34 ppm
Co 4A-MICP2 410 19 ppm
Cu FUS6 5.21 0.28 %
Cu 4A_MICP2 5.28 0.11 %
U 4A_MICP2 8.4 0.9 ppm
LOI LOI4 4.45 0.23 %
SG SG5 2.8 0.1 Dimensionless
Major Oxides
Certified Concentrations (at two Standard Deviations)
Analyte Method Certified(µ) Two Standard deviation (2s) ± Unit
Al2O3 XRF3 5.47 0.12 %
Fe2O3 XRF3 1.64 0.058 %
K2O XRF3 0.73 0.05 %
MgO XRF3 2.99 0.11 %
Na2O XRF3 0.17 0.03 %
P2O5 XRF3 0.11 0.02 %
SiO2 XRF3 77.08 0.884 %
TiO2 XRF3 0.34 0.02 %
