Miocene changes in SW-African climate and ocean circulation: inferences from silt analysis and carbonate preservation studies
Deep-sea sediments from the SE Atlantic at ODP Sites 1085, 1087 and 1265 off the continental margin SW African and the Walvis Ridge were investigated using sedimentological, mineralogical and geochemical analyses in order to paleoenvironmental and paleoclimatic signals in the Neogene. The variation...
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Language: | English |
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Universität Bremen
2006
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/2220 2023-05-15T13:42:30+02:00 Miocene changes in SW-African climate and ocean circulation: inferences from silt analysis and carbonate preservation studies Klimatische und ozeanische Zirkulationsänderungen in SW-Afrika während des Miözän: Ergebnisse aus Siltanalytik und Karbonaterhaltungsstudien Kastanja, Mia Maria Henrich, Rüdiger Diekmann, Bernhard 2006-01-20 application/pdf https://media.suub.uni-bremen.de/handle/elib/2220 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000103049 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/2220 urn:nbn:de:gbv:46-diss000103049 info:eu-repo/semantics/openAccess Miocene silt analysis carbonate preservation Benguela upwelling system SW-Africa 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2006 ftsubbremen 2022-11-09T07:09:45Z Deep-sea sediments from the SE Atlantic at ODP Sites 1085, 1087 and 1265 off the continental margin SW African and the Walvis Ridge were investigated using sedimentological, mineralogical and geochemical analyses in order to paleoenvironmental and paleoclimatic signals in the Neogene. The variation of carbonate and terrigenous deposition from the Miocene sediment records were associated with changes in the atmospheric circulation pattern. The results showed that the driving process of what so called 'Carbonate Crash' event was complex and differed compared to previous investigation in the other regions. The event in the study area represents a more regional phenomenon. The terrigenous grain-size distribution reveals that the establishment of the wind-driven Benguela Upwelling system and close timing of aridification in South Africa was related to the expansion of the Antarctic ice-sheet and intensification of Southern Hemisphere winds. Variability in carbonate contents are related to the global changes in deep-water chemistry and the variations in southern component of dee-water producing during the interglacial and glacial conditions. Doctoral or Postdoctoral Thesis Antarc* Antarctic Ice Sheet Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic The Antarctic Dee ENVELOPE(-59.767,-59.767,-62.433,-62.433) |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Miocene silt analysis carbonate preservation Benguela upwelling system SW-Africa 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
Miocene silt analysis carbonate preservation Benguela upwelling system SW-Africa 550 550 Earth sciences and geology ddc:550 Kastanja, Mia Maria Miocene changes in SW-African climate and ocean circulation: inferences from silt analysis and carbonate preservation studies |
topic_facet |
Miocene silt analysis carbonate preservation Benguela upwelling system SW-Africa 550 550 Earth sciences and geology ddc:550 |
description |
Deep-sea sediments from the SE Atlantic at ODP Sites 1085, 1087 and 1265 off the continental margin SW African and the Walvis Ridge were investigated using sedimentological, mineralogical and geochemical analyses in order to paleoenvironmental and paleoclimatic signals in the Neogene. The variation of carbonate and terrigenous deposition from the Miocene sediment records were associated with changes in the atmospheric circulation pattern. The results showed that the driving process of what so called 'Carbonate Crash' event was complex and differed compared to previous investigation in the other regions. The event in the study area represents a more regional phenomenon. The terrigenous grain-size distribution reveals that the establishment of the wind-driven Benguela Upwelling system and close timing of aridification in South Africa was related to the expansion of the Antarctic ice-sheet and intensification of Southern Hemisphere winds. Variability in carbonate contents are related to the global changes in deep-water chemistry and the variations in southern component of dee-water producing during the interglacial and glacial conditions. |
author2 |
Henrich, Rüdiger Diekmann, Bernhard |
format |
Doctoral or Postdoctoral Thesis |
author |
Kastanja, Mia Maria |
author_facet |
Kastanja, Mia Maria |
author_sort |
Kastanja, Mia Maria |
title |
Miocene changes in SW-African climate and ocean circulation: inferences from silt analysis and carbonate preservation studies |
title_short |
Miocene changes in SW-African climate and ocean circulation: inferences from silt analysis and carbonate preservation studies |
title_full |
Miocene changes in SW-African climate and ocean circulation: inferences from silt analysis and carbonate preservation studies |
title_fullStr |
Miocene changes in SW-African climate and ocean circulation: inferences from silt analysis and carbonate preservation studies |
title_full_unstemmed |
Miocene changes in SW-African climate and ocean circulation: inferences from silt analysis and carbonate preservation studies |
title_sort |
miocene changes in sw-african climate and ocean circulation: inferences from silt analysis and carbonate preservation studies |
publisher |
Universität Bremen |
publishDate |
2006 |
url |
https://media.suub.uni-bremen.de/handle/elib/2220 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000103049 |
long_lat |
ENVELOPE(-59.767,-59.767,-62.433,-62.433) |
geographic |
Antarctic The Antarctic Dee |
geographic_facet |
Antarctic The Antarctic Dee |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/2220 urn:nbn:de:gbv:46-diss000103049 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766168688881303552 |