Deutsches Ozeanographisches
Datenzentrum Inventur der Sonne1-Reise SO206 (DOD-Ref-No.20100146)
Inventory of Sonne1 Cruise SO206 (DOD-Ref-No.20100146)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Sonne1 SO206 30.05.2010 - 18.06.2010   NE Pacific (Limit 180?)  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Hensen Cristian Leibniz-Institut fur Meereswissenschaften an der Universitat Kiel Caldera Caldera   

Ziel der Reise / Objectives of Cruise:

The proposed cruise aimed at collecting essential seismic and geochemical data at and around cold seepage sites located on the active continental margin off Costa Rica in order to improve our knowledge on the subsurface structure of these features and by this get a better understanding of the dewatering system at an active and erosive continental margin. The major target sites were two mud volcano like structures (Mound 11/12) and a large-scale slide caused by subducting seamounts (Jaco Scarp) which both are key targets of IODP proposal 633 that aims to enhance the general understanding on complex forearc dewatering processes of an erosive subduction system. In order to approve drilling by IODP essential high-resolution seismic data were required. For this purpose a conventional MCS-streamer and 3-D SwathSeis system was applied. In addition to seismic investigations, geochemical and microbiological investigations were conducted at various cold seeps. Existing porewater data from these sites support the hypothesis that upward migration of fluids along deep-seated fault systems is an important mechanism of forearc dewatering. However, previously obtained geochemical information is not unambiguous, and hence additional samples were retrieved for analyses of noble and hydrocarbon gases, microbial populations and turnover rates, sediment biomarkers, and pore fluid composition.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
IFMGEO Hensen Cristian 37 stations G04
Core-soft bottom (no. of cores)
Sediments, pore water no
IFMGEO Hensen Cristian 1 n miles G74
Multi-beam echosounding
Simrad EM120 yes
IFMGEO Krastel Sebastian 4 tracks G74
Multi-beam echosounding
- no
IFMGEO Bialas Jorg 2 tracks G76
Multichannel seismic reflection
3D seismic MCS no
IFMGEO Bialas Jorg 3 tracks G76
Multichannel seismic reflection
2D seismic MCS no
IFMGEO Bialas Jorg 1 stations H10
CTD-Stations
- no
IFMGEO Hensen Cristian 1 n miles H80
Other physical measurements
Underway measurements during the whole trip such as coordinates, depth, meteorological parameter and so on yes

Verankerungen / Moorings

Institut
Institute
Wissenschaftler
Scientist
Typ der Messungen
Type of measurements
Kommentar
Comments
geogr.Breite
Latitude
geogr.Länge
Longitude
Daten im DOD
Data in DOD
IFMGEO Bialas Jorg G26 1 OBS Mound 11 8° 59.0' N 84° 18.0' W -
IFMGEO Bialas Jorg G26 2 OBS active BGR-Slide 9° 20.0' N 84° 40.0' W -
IFMGEO Bialas Jorg G26 6 OBS BGR-Slide 9° 10.0' N 84° 40.0' W -
IFMGEO Bialas Jorg G26 6 OBS Jaco Scarp 9° 9.0' N 84° 49.0' W -
16.11.2019