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Glenover Rare Earth Project (Limpopo Province, RSA)
Geological Setting The deposit comprises a central iron rich breccia (subsequently mined out), surrounded by a pyroxenite plug, into which carbonatite has intruded as a series of dykes and cone sheets. The main historical source of geological information concerning the Glenover Carbonatite is Handbook 6 of the Geological Survey of South Africa, ‘The Carbonatites of South Africa and South West Africa’, published in 1967 and authored by WJ Verwoerd. Verwoerd hypothesised that the deposit was created by two geological events that resulted in the formation of a primary and a secondary phosphate deposit. Exploitation has historically focused on the phosphate content of the deposit and the potential of the surrounding rocks. However limited exploration has been undertaken to determine the potential of other metals and minerals, inter alia REE’s (Begley, 1987). Resource Estimations In 2011 the volumes of the Glenover stockpiles were independently surveyed by Global Surveys (Global). This was preceded by a bulk sampling program undertaken on three of the stockpiles. Four 750 kilogram (kg) samples were taken from each stockpile, excluding any material greater than 200 millimeter (mm) in size. No indication is given in the data provided by FMO as to what proportion of the sample comprised material of this size range. Each individual sample was crushed and pulverised and a 25 kg sub sample taken for assay from each of the samples using a spear sampling technique. For each stockpile, an additional sample, referred to as the homogenised sample was created by mixing 150 kg of sample from each of the primary samples. Bulk density (SG) measurements for two of the stockpiles were undertaken by Harrison in 2004. Snowden has assumed that the lower SG values provided by Harrison (2004), in conjunction with the volumes provided by Orbital, may be used to estimate the total tonnes (t) of material contained within the sampled stockpiles. Glenover Phosphate Project Independent Resource Statement Note:
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