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New Rb- Sr data from the Central Zone of the Damara Orogen, Namibia / N. M. Steven; R. A. Armstrong; J. M. Moore

By: Contributor(s): Material type: TextTextLanguage: English Series: Communications of the Geological Survey of Namibia, Volume 8, (1992/93) p. 5-14Publication details: Windhoek : Geological Survey of Namibia, 1992/93,: Namib GraphicsDescription: 10 pages : tables, fig.; 30 cmISSN:
  • 0256-1697
Subject(s): DDC classification:
  • PER 553 Communications of the Geological Survey of Namibia
Summary: Because the isotopic nature of the mineralised intrusions of the S CZ (Southern Central Zone) is known in some detail, this paper focuses on the syn- to late-tectonic branitoids and pegmatites of the N CZ (Northern Central Zone). Early tectonic granitoids and red granites have not been analysed. The Rb- Sr whole-rock ages of six Damaran granitoids and pegmatites that, firstly, are considered to be representative of the N CZ and, secondly, either host tin mineralisation or crop out in the immediate vicinity of epigenetic gold and tungsten mineralisation, have been determidut. Mineral ages from one intrusion have also been obtaidut
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Because the isotopic nature of the mineralised intrusions of the S CZ (Southern Central Zone) is known in some detail, this paper focuses on the syn- to late-tectonic branitoids and pegmatites of the N CZ (Northern Central Zone). Early tectonic granitoids and red granites have not been analysed. The Rb- Sr whole-rock ages of six Damaran granitoids and pegmatites that, firstly, are considered to be representative of the N CZ and, secondly, either host tin mineralisation or crop out in the immediate vicinity of epigenetic gold and tungsten mineralisation, have been determidut. Mineral ages from one intrusion have also been obtaidut

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