After weathering, the granite porphyry vein is white (slightly greenish-white when fresh) with a porphyritic structure. Phenocrysts (about 30%) are mainly feldspar and the matrix (about 70%) is mainly ...

HIGHLIGHTS • The work on the Definitive Feasibility Study (DFS) for the Flat Mines Project, the first mine that Orion intends to develop at the Okiep Copper Project (OCP), is nearing completion and ...