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GEOREF RECORD

Tale of three cratons; tectonostratigraphic anatomy of the Damara Orogen in northwestern Namibia and the assembly of Gondwana

Anthony R. Prave
Tale of three cratons; tectonostratigraphic anatomy of the Damara Orogen in northwestern Namibia and the assembly of Gondwana
Geology (Boulder) (December 1996) 24 (12): 1115-1118

Abstract

The Neoproterozoic Damara orogen in Namibia records the Gondwanan assembly of the Congo-Kalahari-Rio de la Plata cratons. Sedimentological and stratigraphic analyses of the Otavi (mostly carbonate) and Mulden (siliciclastic molasse) Groups exposed along the southwestern margin of the Congo craton indicate that foreland-basin orogenesis began during middle Otavi (ca. 600-750 Ma); this time frame is earlier than that for the Nama foreland (ca. 550 Ma) on the Kalahari craton. Evidence for this interpretation includes (1) an intra-Otavi angular unconformity; (2) concomitant development of increasing accommodation space, basin segmentation, and backstepping depositional systems composed mostly of deep-basin and slope hemipelagic and sediment gravity-flow deposits; and (3) a near reversal in paleocurrents (initially northward off the Congo craton, then switching to southeastward from a west-northwestern orogen). Thus, Congo-Rio de la Plata suturing predated Congo-Kalahari suturing during the assembly of Gondwana.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 24
Serial Issue: 12
Title: Tale of three cratons; tectonostratigraphic anatomy of the Damara Orogen in northwestern Namibia and the assembly of Gondwana
Author(s): Prave, Anthony R.
Affiliation: University of St. Andrews, Department of Geology, St. Andrews, United Kingdom
Pages: 1115-1118
Published: 199612
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 30
Accession Number: 1997-000015
Categories: StratigraphySedimentary petrologySolid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch map
S20°00'00" - S18°30'00", E13°49'60" - E14°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199701
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