Quartäre Schwankungen in Strömungsintensität und Produktivität als Abbild der Wassermassen-Variabilität im äquatorialen Atlantik (ODP Sites 959 und 663): Ergebnisse aus Siltkorn-Analysen.
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Authors: | Schneider, S. | Abstract: | In order to reconstruct intermediate water circulation of the equatorial Atlantic and paleoproductivity of the equatorial divergence, silt grain-size analysis were performed on sediments of the north-westem African continental slope (ODP Site 959) and on pelagic sediments of the Guinea Basin (ODP Site 663) for the last 1 Ma.Silt grain-size records of ODP Site 959 monitor distinct fluctuations of the intermediate water circulation of the equatorial Atlantic especially during tenninations. Based on the terrigenous "sortable silt" fraction, grain-size spectra of the terrigenous silt and their statistic grain-size parameters, variations of the UNADW/GNAIW circulation could be deduced due to glacial/interglacial changes. The observed gradients should have been strengthened by the exposed setting of ODP Site 959. During the period from 1 Ma - today a low but continous sedimentation was detennined at Site 959. |
Issue Date: | 2001 | Journal/Edited collection: | Berichte, Fachbereich Geowissenschaften, Universität Bremen | Volume: | 187 | Pages: | 134 pp | Type: | Bericht, Report | ISSN: | 0931-0800 | Secondary publication: | no | URN: | urn:nbn:de:gbv:46-ep000103140 | Institution: | Universität Bremen | Faculty: | Fachbereich 05: Geowissenschaften (FB 05) | Institute: | Marum – Zentrum für Marine Umweltwissenschaften |
Appears in Collections: | Forschungsdokumente |
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