Deutsches Ozeanographisches
Datenzentrum Inventur der Sonne1-Reise SO222 (DOD-Ref-No.20120280)
Inventory of Sonne1 Cruise SO222 (DOD-Ref-No.20120280)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Sonne1 SO222 08.06.2012 - 19.07.2012   Japan Sea  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Kopf Achim Universitat Bremen, Zentrum fur Marine Umweltwissenschaften Hong Kong Pusan   

Ziel der Reise / Objectives of Cruise:

Abstract Approximately 90% of the seismic moment on Earth is released in often devastating subduction zone earthquakes (EQs). In the Integrated Ocean Drilling Program (IODP), the study of seismogenesis along an active convergent margin plays a key role in the form of a multi-expedition effort named "NanTroSEIZE" (Nankai Trough Seismogenic Zone Experiment). To date, eight expeditions (IODP Expeditions 314-316, 319, 322, 326, 332-333) drilled 12 sites along a transect from the incoming plate across the frontal accretionary prism to the forearc basin. Two holes are currently equippe dwith long-term instruments (C0002, C0010). The project Sonne SO222 MEMO, MeBo drilling & in situ long-term Monitoring offshore Japan (Nankai Trough Accretionary Prism), aims to extend the long-term monitoring efforts to active mud volcanoes in the northern Kumano Basin. These features carry gas hydrates and deep-seated fluids, most likely tapping into the seismogenic zone at a depth of several km below seafloor, and are also overlying an area of high strains and a locked plate boundary-thrust. Cruise SO222 sampled both mud volcanoes and background sediments and installed long-term monitoring devices in key locations. The main results of the two legs SO222A and SO222B include: - The discovery of 5 new, previously not reported mud volcanoes, so that there are 13 MVs in the Kumano Basin now; - Gas hydrate presence in many of the features; - Enigmatic pore fluid signatures with high B, Li and Sr, but low Mg in the pore waters, suggesting deep-seated fluid origin; - Successful installation of of 4 MeBo borehole observatories in a total of six holes drilled in appx. 2 km water depth; - Successful installation of six CAT flowmeters on the most active mud volcanoes in the Kumano field; - Successful operation on so-called MeBoCORK observatories with ROV Quest; - Recovery of gravity and MeBo cores as well as TV grab that contain a suite of clasts in the mud breccias that span the range from soft to hard rocks and cover all grain size classes of sedimentary rocks, but also comprise magmatic materials and deformed rocks; - Gas composition attests a biogenic origin for the majority of the mud domes visited; - Heat flow data attest active flow in at least some of the mud domes; however, - No active venting was neither observed by acoustic techniques nor by direct observation with ROV or TV-grab.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
MARUM Kopf Achim 5 stations G02
Grab
ROV no
MARUM Kopf Achim 6 cores G04
Core-soft bottom (no. of cores)
MEBO no
MARUM Kopf Achim 46 stations G04
Core-soft bottom (no. of cores)
Gravity Corer no
MARUM Kopf Achim 5 stations G08
Bottom photography
Televison Grab no
MARUM Kopf Achim 12 stations G73
Single-beam echosounding
Parasound no
MARUM Kopf Achim 1 km G90
Other geological or geophysical measurements
Multibeam EM 120, EM 1002 yes
MARUM Kopf Achim 2 stations H10
CTD-Stations
- no
MARUM Kopf Achim 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
MARUM Kopf Achim G08 TV-Grab Typ A, Smart Plug 33° 39.4' N 136° 38.0' E no
MARUM Kopf Achim G90 Meeresbodenbohrer, CORK A 33° 39.4' N 136° 38.1' E no
MARUM Kopf Achim G90 Meeresbodenbohrer, CORK B 33° 38.1' N 136° 40.3' E no
MARUM Kopf Achim G90 Meeresbodenbohrer, Plug1 33° 38.1' N 136° 40.2' E no
MARUM Kopf Achim G90 Meeresbodenbohrer, Plug2 33° 39.5' N 136° 38.0' E no
MARUM Kopf Achim H90 1. Flowmeter abgesetzt, Ankerstein z.W. 33° 39.4' N 136° 38.1' E no
MARUM Kopf Achim H90 2. Flowmeter abgesetzt, Ankerstein z.W. 33° 39.4' N 136° 38.1' E no
MARUM Kopf Achim H90 3. Flowmeter abgesetzt, Ankerstein z.W. 33° 38.0' N 136° 40.2' E no
MARUM Kopf Achim H90 4. Flowmeter abgesetzt, Ankerstein z.W. 33° 40.5' N 136° 55.3' E no
MARUM Kopf Achim H90 5. Flowmeter abgesetzt, Ankerstein z.W. 33° 40.5' N 136° 55.3' E no
MARUM Kopf Achim H90 6. Flowmeter abgesetzt, Ankerstein z.W. 33° 38.1' N 136° 40.3' E no
9.11.2019