Deutsches Ozeanographisches
Datenzentrum Inventur der Poseidon-Reise POS457 (DOD-Ref-No.20130090)
Inventory of Poseidon Cruise POS457 (DOD-Ref-No.20130090)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Poseidon POS457 07.08.2013 - 22.08.2013   North Atlantic Ocean  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Werner Reinhard GEOMAR Helmholtz-Zentrum fur Ozeanforschung Kiel Reykjavik Galway   

Ziel der Reise / Objectives of Cruise:

R/V POSEIDON cruise P457 aimed further development of detailed marine tephrachronology of Iceland by sediment coring in order to improve our knowledge of the spatio-temporal evolution of Icelandic volcanism and related hazards. The history of Icelandic volcanism has been extensively studied on land. However, the marine record of Icelandic volcanism, in particular during the pre-Holocene time period, is not well known but has the potential to extend our knowledge of Icelandic volcanism further back in time with a high temporal resolution. In addition, the marine record contains paleoclimatic information, which may relate recurrent glacier advances and land degradation periods to ocean and atmospheric circulation changes. A minor sub-project aimed to contribute to a better understanding of Surtsey volcanism by investigations of marine Surtsey tephra. P457 conducted extensive sediment echosounding (11 surveys) in order to identify undisturbed sediment sequences since the area south of Iceland is strongly affected by rivers, jokulhlaups, debris flows, etc. At 20 appropriate sites, P457 deployed gravity and/or gaint box corers to recover ultra-high resolution sediment cores from < 100 m to a maximum of ~1.500 m water depths at the south-western, southern and eastern sectors of the Icelandic shelf and slope. Of these deployments, 10 gravity corers yielded altogether 58,6 m core recovery and 14 box corers recovered surface sediment samples. Additionally 7 CTD/rosette water sampling stations have been performed at shallow sites close to Iceland and at deep sites further offshore in order to determine the REE distributions and the Nd and Hf isotope compositions of the sea water.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
GEOMAH Hoernle K.A. 20 stations G04
Core-soft bottom (no. of cores)
Sediment sampling by gravity corer, and giant box corer for sedimentological and geochemical analyses on shore. no
GEOMAH Nurnberg Dirk 11 survey G72
Geophysical measurements made at depth (below near surface and above seafloor)
Sediment echosounding surveys. no
GEOMAH Frank Martin 7 deployment H10
CTD-Stations
Water sampling for geochemical analyses on shore. no
16.11.2019