Figure 5. Photomicrographs of ultramafic rock samples showing (a) Clinopyroxene (cpx) crystals embedded within fine grained matrix of othopyroxene (opx) resulting in an interlocking crystal grains with well defined grain boundaries, (b) clinopyroxene and olivine (ol) partially altered to actinolite and chlorite with a euhedral kidney-shaped crystal of garnet (grt) inclusion with a high relief and granoblastic texture, (c) fine grain crystals of tremolite (tr) with a subhedral form and a prismatic habit, (d) prismatic crystal of hornblende (hb) showing two good directions of cleavage with complex intergrowth of crystals interwoven with tremolite, actinolite, epidote, chlorite and sulphides, (e) plagioclase (pl) with interlocking tabular equant grains with stubby aggregate grains of chlorite and epidote along the fracture zones of the plagioclase, (f) fine grained mesh of epidote, tremolite, talc and actinolite. These minerals are brightly coloured and display plumose and decussate radiating textures controlled by the cleavage planes plagioclase

From

Mineral Alteration and Chlorite Geothermometry in Platinum Group Element (PGE)- Bearing Meta-ultramafic Rocks from South East Cameroon

Ako T. A., A. Vishiti, K. I. Ateh, A. C. Kedia, C. E. Suh

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