Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Linking Stratigraphy on the Lomonosov Ridge With Standard Lithological Units of the Amerasian Basin, Arctic Ocean
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för geologi och geokemi. Marin geovetenskap.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för geologi och geokemi. Marin geovetenskap.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för geologi och geokemi. Marin geovetenskap.
2006 (Engelska)Ingår i: AGU Fall Meeting 2006Eos Trans. AGU, 87(52), Fall Meeting, 2006Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
Abstract [en]

AB: Short sediment cores taken from the ice-island T3 between 1963 and 1973 were used by Clark et al. (1980) to establish a lithological classification for the Amerasian Basin in the Arctic Ocean. Over a 310 cm long stratigraphic section, synthesized from 67 cores, 13 units were recognized and labeled A to M. This lithostratigraphic model has since been applied to correlate sediment cores over large distances on the Amerasian side, i.e., between cores on the Alpha Ridge, the Northwind Ridge and the Mendeleev Ridge. The chronostratigraphy for this lithostratigraphic model was developed by the identification of the Brunhes- Matuyama paleomagnetic reversal boundary (781 ka) and the assumption of linear sedimentation rates in the synthesized lithologic model. However, recent studies have shown that this measured magnetic polarity change rather represents a short-time excursion within the Brunhes chron, implying an order of magnitude higher sedimentation rates than originally assumed. We have investigated whether it is possible to link the lithostratigraphy from the Alpha Ridge to cores taken on the Lomonosov Ridge which, in turn, have been linked to cores in the Eurasian Basin. The cores selected for this comparison were cores B-8 and B-24 from the LOREX ‘79 ice island drift expedition, core PS2185-6 from the ARK-VIII/3 expedition of 1991 and core 96/12- 1pc from the Arctic Ocean 96 expedition. Averaged sedimentary proxies (paleomagnetism, grain size, and microfossil abundance) from selected sets of T3 cores and published by Clark et al. (1980), have been used here to correlate the included Lomonosov Ridge cores. A lithostratigraphic connection between the Amerasian Basin and the Lomonosov Ridge stratigraphies was partly successfully established, although Clark's lithostratigraphic units A to M could not be recognized in the Lomonosov Ridge. Nevertheless, the established correlations clearly show that the Amerasian Basin is characterized by lower sedimentation rates when compared to the rates obtained from the Lomonosov Ridge and the Eurasian Basin , but that the Amerasian Basin rate are not as low as Clark and others previously suggested.

Ort, förlag, år, upplaga, sidor
2006.
Nationell ämneskategori
Geologi
Identifikatorer
URN: urn:nbn:se:su:diva-19502OAI: oai:DiVA.org:su-19502DiVA, id: diva2:186026
Tillgänglig från: 2007-11-12 Skapad: 2007-11-12Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Sök vidare i DiVA

Av författaren/redaktören
Sellén, EmmaJakobsson, MartinBackman, Jan
Av organisationen
Institutionen för geologi och geokemi
Geologi

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 21 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf