BODC Cruise Metadata Report for FS Sonne (06BE) cruise SO215
Introduction
This report collates information from the BODC cruise inventory and oceanographic databases. It presents
- Cruise Inventory Information
- A summary of BODC data holdings for the cruise from the
- References - including cruise tracks and cruise reports
Cruise Inventory Information
| Long name | FS Sonne (06BE) cruise SO215 |
|---|---|
| Short name | SO215 |
| Objectives and Narrative |
Subduction zones are dynamically evolving features that mark the sites of plate consumption and the recycling of sediment and magmatic material. The Tonga-Kermadec island arc-deep-sea trench system is an ideal study site as it is the most linear, fastest converging and most seismically active of any of the world's subduction zones, and the system has evolved over a long period of geological time (>50 Myr). The rapidity and obliqueness of convergence makes the Louisville Ridge-Tonga-Kermadec Trench an ideal locality to determine the mechanical response of the crust and lithosphere to loading and, hence, the integrated strength of the lithosphere. This is important for assessing whether the coupling between the subducting and overriding plates is 'soft' or 'hard' as well as providing constraints on rheological structure. The Tonga-Kermadec Trench collision with the Louisville Ridge is also associated with a seismic gap, especially so in shallow seismicity. This makes this also an ideal locality to test the 'Kelleher- McCann' hypothesis that bathymetric features on the subducting plate may control aspects of arc seismicity. Our scientific objectives were addressed by an integrated marine geophysical experiment that comprises simultaneous seismic reflection (MCS) and wide-angle (WA) refraction, gravity, magnetic, bathymetry and sub-seabed high-resolution imaging of the Louisville Ridge-Tonga-Kermadec Trench collision system. The acquisition geometry included:
a) Profile A - a 400 km MCS/WA transect across the ridge-trench intersection, designed to determine the across-strike structure of the collision zone between the arc, across the forearc and trench, to the outer rise. Whilst also imaging the crust and uppermost mantle structure in the aseismic zone and high-curvature weak zone in the seaward wall of the trench, this profile also imaged deformation solely related to collision to allow distinction from that induced by seamount interaction with the overriding plate. b) Profile B - a 425 km MCS/WA transect across the Louisville Ridge and moat as they ride the trench outer rise, designed to determine the mode of isostatic compensation beneath the ridge at the northernmost part of the chain, and the effect of collision on the mechanical strength and flexural response of the subduction system. c) Profile C - a 725 km MCS/WA transect along the Louisville Ridge, traversing IODP drill sites. This transect extends across the Tonga-Kermadec Trench, and was designed to determine the structure of the Louisville Ridge (the pre-subduction crust), any along-ridge variation in crustal structure or underplating, how seamounts interact with the overriding plate upon their subduction, and how along-ridge variation in topography, crust and uppermost mantle structure relate to observed post-collision uplift. d) Profile D - a 350 km MCS transect designed to investigate pre-subduction crustal structure "background". e) Profile G - a 240 km MCS/WA transect designed to investigate the crustal structure of the forearc and deformation in the overriding plate. Along each WA profile ocean-bottom seismographs (OBSs) were deployed at ~10-15 km intervals, to record airgun shots from an array configured for contemporaneous MCS / WA acquisition. Gravity, magnetic and swath bathymetry data were acquired along all profiles. |
| Ship | FS Sonne |
| Departure Port | Auckland, New Zealand |
| Departure Date | 2011-04-25 |
| Arrival Port | Townsville, Australia |
| Arrival Date | 2011-06-11 |
| Principal Scientist(s) | Christine Peirce (University of Durham, Department of Earth Sciences) |
| Responsible Organisation | University of Durham, Department of Earth Sciences |
| Associated Project(s) | |
| IHB Sea Areas Visited | Tasman Sea |
| Marsden Squares Visited | 356/357/389/390/391/392/425/426 |
| Work Area Description | Louisvile Ridge and its intersection with the Tonga-Kermadec Trench |
| Unable to lookup cruise bounds at this time | |
| Work Area Bounding Polygon | |
| Southern Limit | unknown |
| Northern Limit | unknown |
| Western Limit | unknown |
| Eastern Limit | unknown |
Cruise Inventory Datasets
| Physical oceanography | |
|---|---|
| Bathythermograph |
Quantity:
number of deployments =
24
Description: Expendible bathymetric thermograph |
| Other physical oceanographic measurements |
Quantity:
number of deployments =
1
Description: Sound velocity |
| Geology and geophysics | |
| Gravity measurements |
Quantity:
activity duration in days =
47
Description: Gravity - LaCoste-Romberg - Air-Sea meter, base tied pre- and post-cruise |
| Magnetic measurements |
Quantity:
number of profiles =
5
Description: Magnetics - SeaSpy |
| Magnetic measurements |
Quantity:
number of surveys =
3
Description: Magnetics - SeaSpy |
| Multi-beam echosounding |
Quantity:
activity duration in days =
47
Description: Swath bathymetry - Simrad EM120 |
| Multi-beam echosounding |
Quantity:
activity duration in days =
37
Description: Atlas Parasound PS 70 |
| Multichannel seismic reflection |
Quantity:
track kilometres =
725
Description: Profile C - 96 channel multichannel reflection seismic data - Sercel SEAL |
| Multichannel seismic reflection |
Quantity:
track kilometres =
400
Description: Profile A - 96 channel multichannel reflection seismic data - Sercel SEAL |
| Multichannel seismic reflection |
Quantity:
track kilometres =
240
Description: Profile G - 96 channel multichannel reflection seismic data - Sercel SEAL |
| Multichannel seismic reflection |
Quantity:
track kilometres =
350
Description: Profile D - 96 channel multichannel reflection seismic data - Sercel SEAL |
| Multichannel seismic reflection |
Quantity:
track kilometres =
425
Description: Profile B - 96 channel multichannel reflection seismic data - Sercel SEAL |
| Seismic refraction |
Quantity:
number of deployments =
126
Description: Ocean-bottom seismograph (OBS) deployments |
| Seismic refraction |
Quantity:
track kilometres =
240
Description: Profile G - wide-angle refraction seismic data - 4 component OBS |
| Seismic refraction |
Quantity:
track kilometres =
725
Description: Profile C - wide-angle refraction seismic data - 4 component OBS |
| Seismic refraction |
Quantity:
track kilometres =
400
Description: Profile A - wide-angle refraction seismic data - 4 component OBS |
| Seismic refraction |
Quantity:
track kilometres =
425
Description: Profile B - wide-angle refraction seismic data - 4 component OBS |
Cruise Inventory Mooring/Buoy Operations
No information on datasets is currently available
Summary of BODC Data Holdings for the Cruise
National Oceanographic Database
Summary
| # Series | Instrument Description | Parameters |
|---|---|---|
| 22 | Bathythermograph (MBT/XBT) |
Reference numbers Sound velocity and travel time in the water column Temperature of the water column Vertical spatial coordinates |
Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)
Full List
| BODC Reference | Instrument Description | Date/Time | Location | |
|---|---|---|---|---|
| 1718837 | Bathythermograph (MBT/XBT) | 2011-04-28 13:04Z | 27° 48' S, 175° 57' W | Click for more |
| 1718849 | Bathythermograph (MBT/XBT) | 2011-05-01 13:15Z | 27° 26' S, 177° 5' W | Click for more |
| 1718850 | Bathythermograph (MBT/XBT) | 2011-05-01 21:12Z | 27° 4' S, 176° 2' W | Click for more |
| 1718862 | Bathythermograph (MBT/XBT) | 2011-05-02 05:24Z | 26° 39' S, 174° 52' W | Click for more |
| 1718874 | Bathythermograph (MBT/XBT) | 2011-05-02 12:21Z | 26° 15' S, 174° 49' W | Click for more |
| 1718886 | Bathythermograph (MBT/XBT) | 2011-05-02 16:46Z | 26° 1' S, 174° 19' W | Click for more |
| 1718898 | Bathythermograph (MBT/XBT) | 2011-05-02 20:50Z | 25° 51' S, 174° 54' W | Click for more |
| 1718905 | Bathythermograph (MBT/XBT) | 2011-05-03 19:58Z | 25° 11' S, 177° 17' W | Click for more |
| 1718917 | Bathythermograph (MBT/XBT) | 2011-05-13 14:56Z | 25° 31' S, 176° 6' W | Click for more |
| 1718929 | Bathythermograph (MBT/XBT) | 2011-05-15 22:58Z | 28° 57' S, 173° 1' W | Click for more |
| 1718930 | Bathythermograph (MBT/XBT) | 2011-05-16 06:34Z | 28° 9' S, 173° 43' W | Click for more |
| 1718942 | Bathythermograph (MBT/XBT) | 2011-05-16 11:12Z | 27° 36' S, 174° 10' W | Click for more |
| 1718954 | Bathythermograph (MBT/XBT) | 2011-05-16 15:17Z | 28° 9' S, 173° 43' W | Click for more |
| 1718966 | Bathythermograph (MBT/XBT) | 2011-05-16 20:53Z | 26° 16' S, 174° 49' W | Click for more |
| 1718978 | Bathythermograph (MBT/XBT) | 2011-05-17 01:43Z | 25° 33' S, 175° 10' W | Click for more |
| 1718991 | Bathythermograph (MBT/XBT) | 2011-05-17 07:00Z | 24° 43' S, 175° 33' W | Click for more |
| 1719005 | Bathythermograph (MBT/XBT) | 2011-05-17 15:45Z | 23° 35' S, 176° 5' W | Click for more |
| 1719017 | Bathythermograph (MBT/XBT) | 2011-05-27 14:09Z | 25° 10' S, 175° 35' W | Click for more |
| 1719029 | Bathythermograph (MBT/XBT) | 2011-05-27 20:57Z | 26° 14' S, 175° 50' W | Click for more |
| 1719030 | Bathythermograph (MBT/XBT) | 2011-06-02 00:31Z | 25° 53' S, 177° 4' W | Click for more |
| 1719042 | Bathythermograph (MBT/XBT) | 2011-06-02 00:56Z | 25° 53' S, 177° 4' W | Click for more |
| 1719054 | Bathythermograph (MBT/XBT) | 2011-06-02 01:24Z | 25° 53' S, 177° 10' W | Click for more |
Project Database
No data currently held for this cruise in the BODC Project Database
