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dc.contributor.authorWigand, Marcus Oliver
dc.date.accessioned2010-10-28T18:46:32Z
dc.date.available2010-10-28T18:46:32Z
dc.date.issued2005
dc.identifier.urihttp://hdl.handle.net/11858/00-1735-0000-0001-32D5-9
dc.description.abstractThe Erongo complex is the largest of the Cretaceous igneous complexes in the Damaraland, Southern Etendeka Province, Namibia. Erongo is made up of a series of mainly silicic volcanic and intrusive units, like many of the Damaraland complexes, but it is unique by virtue of its size and well-preserved igneous sequence silicic magmas as well as tholeiitic and alkaline basalts.The goals of this study were to determine the ages and petrogenetic relationships of the silicic and basic units in the Erongo complex, and to contribute to understanding the magmatic evolution of the Damaraland province. As part of this investigation, Os isotope compositions were determined on basic rocks from the complex, and this is the first study of Os isotopes in the Etendeka Province. The Erongo is built up on a sequence of tholeiitic basaltic lavas which are compositionally equivalent to the Southern Etendeka flood basalts (Tafelberg type) and probably represent erosional remnants of these (see below). The felsic volcanic units at Erongo include two types of rhyodacites and one rhyolite. The most voluminous of these is the Ombu rhyodacite, which has a thickness of up to 500 m and makes up most of the topographic expression of the complex. The Ombu rhyodacite rests directly on the basal tholeiites in the southern and eastern part of the complex, but to the north and west, a second rhyodacite occurs below it, the Erongorus rhyodacite ...
dc.format.mimetypeapplication/pdf
dc.language.isodeu
dc.publisherGFZ, Helmholtz-Zentrum
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/2.0/de/deed.de
dc.subject.ddc551
dc.subject.gokVBN 500
dc.subject.gokVER 300
dc.subject.gokVAC 000
dc.subject.gokVKB 111
dc.subject.gokVKB 124
dc.subject.gokVBO 000
dc.subject.gokVJJ 000
dc.titleGeochemie und Geochronologie des Erongo-Komplexes, Namibia
dc.typemonograph
dc.subject.gokverbalGeochronologie einzelner Regionen im allgemeinen
dc.subject.gokverbalBotswana {Geologie}
dc.subject.gokverbalMagmatismus {Geologie}
dc.subject.gokverbalGranitische Gesteine {Petrologie}
dc.subject.gokverbalBasaltische Vulkanite {Petrologie}
dc.subject.gokverbalIsotopengeologie
dc.subject.gokverbalSpezielle Geochemie
dc.identifier.doi10.23689/fidgeo-580
dc.identifier.ppn481929347
dc.type.versionpublishedVersion
dc.relation.volumeScientific Technical Report / Geoforschungszentrum Potsdam; 2005, 02
dc.bibliographicCitation.journalScientific Technical Report / Geoforschungszentrum Potsdam
dc.relation.collectionGeophysik
dc.description.typethesis


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