DOI: 10.1007/s00531-013-0974-5
Scopus记录号: 2-s2.0-84894252090
论文题名: The provenance of northern Kalahari Basin sediments and growth history of the southern Congo Craton reconstructed by U-Pb ages of zircons from recent river sands
作者: Gärtner A. ; Linnemann U. ; Hofmann M.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 2 起始页码: 579
结束页码: 595
语种: 英语
英文关键词: Episodic crustal growth and reworking
; Northern Kalahari Basin
; Pan-African orogeny
; Southern Congo Craton
; U-Pb zircon dating
英文摘要: The southern Congo Craton is widely overlain by Meso- to Cenozoic sediments of the northern Kalahari Basin, which hamper any correlation of basement units. The latter are represented by the Archaean Angola and Kasai Blocks, while the southern cratonic margin is framed by several Meso- to Neoproterozoic orogenic belts. For provenance analysis of the sedimentary cover and reconstruction of the main zircon-forming events, we studied zircons from recent sediments of the largest rivers at the southern margin of the Congo Craton. U-Pb zircon ages suggest a major amount of the sediments to originate from E Lufilian and Kibaran Belts, while input from the S Damara Belt seems to increase to the W. Ages related to the Angola Block were only noticed in the westernmost parts of the working area, which is not in accordance with the SE-trending drainage pattern, proposed to have been onset during the Cretaceous. Thus, it is assumed that the Meso- to Cenozoic sedimentary cover extended further west than today prior to the Mesozoic to Neogene uplift of the Angola Block and that subsequent erosion exhumed the basement stepwise from west to east. A recurrent destabilisation of the southern margin of the Congo Craton at ~2.7, 1.9, 1.0 and 0.6 Ga is supposed to be represented by major peaks in the age distribution pattern of the total amount of concordant zircons. This is in accordance with similar studies in adjacent areas. Additionally, the obtained data fit well to several hypothesised major events during the supercontinent cycle. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894252090&doi=10.1007%2fs00531-013-0974-5&partnerID=40&md5=9283b453e87eb86dd123a845c212f154
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70361
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: GeoPlasma Lab, Sektion Geochronologie, Museum für Mineralogie und Geologie, Senckenberg Naturhistorische Sammlungen Dresden, Königsbrücker Landstraße 159, 01109 Dresden, Germany
Recommended Citation:
Gärtner A.,Linnemann U.,Hofmann M.. The provenance of northern Kalahari Basin sediments and growth history of the southern Congo Craton reconstructed by U-Pb ages of zircons from recent river sands[J]. International Journal of Earth Sciences,2014-01-01,103(2)