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foliation

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foliation

Planar arrangement of structural or textural features in any rock type, but particularly that resulting from the alignment of constituent mineral grains of a metamorphic rock along straight or wavy planes. Foliation commonly occurs parallel to original bedding, but it may not be obviously related to any other structural direction. Foliation is exhibited most prominently by sheety minerals, such as mica or chlorite.


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Coeval craton-scale deformation is associated with the development of the N- to NW-trending regional foliation, and high-temperature metamorphism is associated with the formation of migmatitic diatexites.
Geological mapping indicates that the mineralization occurs conformably within foliation parallel horizons that have been the subject of preferential structural preparation.
Gold mineralization identified to date at Morogoro occurs in the form of multiple narrow (10 cm to 50 cm) foliation parallel quartz veinlets and/or silicified zones containing fine visible gold.
 
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