FREA brings you Orbicular Bodies of Namaqualand, Southwest Africa; a digitized summary written by Dr. Enzmann of an article published in Avco Research and Development’s Fourth Western National Meeting Program, 1964.
The Namaqualand batholith, or granite-gneiss massif, is a complex belt of orbicular textured granites, syenites, diorites, charnockites, and anorthositic copper deposits in Namaqualand, Southwest Africa. It is described as a sequence of three cyclothemes, each of which contains five metasediments. This complex is a greatly altered Geosynclinal system approximately 2,250 million years old.
Orbicular-textured and non-orbicular schists, charnockites, and anorthosites form only a small fraction of the total volume of the system, however, they show vast extents along the strike. Orbicular textures are only, though not always, found when certain conditions are fulfilled.
Join us in the Archive to read how Dr. Enzmann thoroughly describes the five metasediments included in the cyclothemes and explains to us the conditions for finding orbicular textures and their sequences in Orbicular Bodies of Namaqualand, Southwest Africa.
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