Neogene Paleoenvironmental changes in the McMurdo Sound region: High resolution chemical and sedimentological analysis of Miocene (ca17 Ma) to Pleistocene sediments from ANDRILL Site SMS

Description: Das Projekt "Neogene Paleoenvironmental changes in the McMurdo Sound region: High resolution chemical and sedimentological analysis of Miocene (ca17 Ma) to Pleistocene sediments from ANDRILL Site SMS" wird vom Umweltbundesamt gefördert und von Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung - Fachbereich Geowissenschaften durchgeführt. At ANDRILL site SMS (Southern McMurdo Sound) an longer than 1000m sediment core will be drilled from a sea-ice platform covering Early/Middle Miocene (ca17 Ma) to Pleistocene strata of McMurdo Sound, Ross Sea, Antarctica. The target sediments were deposited on the western flank of the Victoria Land Basin (VLB), a structural half-graben that forms part of the West Antarctic Rift system, and experienced subsidence since late Eocene times. On this sediment core we propose to combine high-resolution on-ice measurement of chemical element concentrations using XRF core-scanner with off-ice high-precision chemical and sedimentological analysis on bulk samples (XRF, XRD, ICP-MS, biogenic components) and individual lithoclasts (LA-ICP-MS, electron microprobe, microscopy). The resulting multiple dataset will provide detailed information on sediment composition and, thus, contribute to several scientific objectives of ANDRILL such as the history of Ross/West Antarctic ice shelf expansion and retreat since ca17 million years, sea-ice presence/absence in the McMurdo region, and the history of Neogene sediment provenance and accumulation rates in the VLB. Our major goal is to improve our understanding of the Neogene paleoenvironmental evolution of Antarctica with a special focus on the Mid-Miocene climatic optimum (ca17-15 Ma) and the subsequent onset of major cooling (ca14 Ma) along with the key question on the stability of cold-polar climate conditions during the last 14 million years

SupportProgram

Origin: /Bund/UBA/UFORDAT

Tags: Kontinentalschelf ? Graben ? Meereis ? Büro ? Mikroskopie ? Mikrosondenanalyse ? Bodensenkung ? Antarktis ? Bohrkern ? Chemikalien ? Evolution ? Einzugsgebiet ? Sediment ? Meeresgewässer ? Chemisches Element ? Messung ? Abdeckung ? Bohrung ? Kühlung ? Gebiet ? Bestandteil ? Teil ? besonder ? südlich ? vorschlagen ? wissenschaftlich ? Bahnsteig ? Elektronen ? Ergebnis ? Formblätter ? Konfliktanalyse ? Konfliktbewältigung ? Konzentrat ? Land ? Probe ?

Region: Bremen

License: cc-by-nc-nd/4.0

Language: Englisch/English

Organisations

• Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung - Fachbereich Geowissenschaften (Betreiber*in)
• Deutsche Forschungsgemeinschaft (Bereitsteller*in)
• Umweltbundesamt (Bereitsteller*in)

Time ranges: 2007-01-01 - 2011-12-31

Resources

• Webseite zum Förderprojekt

  http://www.spp-antarktisforschung.de/ (Webseite)

Status

Aktiv

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