Northern Cape, South Africa
Zn Pb Cu
Super Porphyry Cu and Au|
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of large zinc, lead and copper deposits are known over an interval
of 500 km on the south-western and western margins of the Kaapvaal/Kalahari
Craton in the Northern Cape Province of South Africa and in southern
Namibia. These are found in both the late Palaeo- and Meso-Proterozoic
metamorphics of the Namaqua Mobile Belt and in the late Neo-Proterozoic
sediments and volcanics of the Gariep Province in Namibia.
Mobile Belt is part of an extensive U-shaped fringe that extends
around the southern, western and northern margins of the Kaapvaal/Kalahari
Province, from the Indian Ocean, to the Atlantic and back into
central Africa and is composed of late Palaeo-Proterozoic and
Meso-Proterozoic gneisses, schists and granitoids after volcanics,
sediments and intrusives that were metamorphosed in the late
Meso-Proterozoic from 1200-1000 Ma. These rocks in part form
the basement to the Damara-Katangan that hosts the deposits of
Module 1 Part A.
an inlier on the western margin of the Kalahari Craton along
the Atlantic coast, is part of the Damaran-Katangan System, resting
unconformably on Namaqualand metamorphics and intrusives. These
comprise a variety of sediments from mixtites through arenites
and argillites to carbonates, with variable but generally lesser
mafic rocks, and felsite-rhyolite volcanics.
segment of the Kalahari Craton to the north and east of the Namaqua
Mobile Belt and Gariep Complex is occupied by a thick sequence
of poorly deformed volcanics and intrusives, the Rehoboth Complex
of granitic, intrusives cutting volcanics of from andesitic to
acid composition with intercalated sediments ranging from 1700
to possibly 1050 Ma in age. These are in part equivalent to the
metamorphosed volcanics and sediments of parts of the Namaqua
The most recent source geological information used to prepare this summary was dated: 2001.
This description is a summary from published sources, the chief of which are listed below.
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