RRS Charles Darwin CD106C
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD106C |
| Cruise period | 1997-07-01 — 1997-07-19 |
| Status | Completed |
| Port of departure | Southampton, United Kingdom |
| Port of return | Bodø, Norway |
| Purpose | Research |
| Objectives | The overall objectives of the project are to quantify large-scale sedimentary processes and to assess their relation to the variability of oceanic and cryospheric processes. These parameters must be understood in order to generate reliable models for large-scale sedimentary processes, in particular mass wasting and deep-sea fan developments. The contributions of the ENAM II group have been focused on the northern parts of the European continental margin. Through this work, the need for better sea-bed imagery data from a selection of crritical sites along the margin has been constrained. Up-to-date deep sea technologies (swath bathymetry and deep towed seismic profiler, high-resolution side scan sonar and sea floor imagery) allow the determination of the large-scale sediment pathways and recognition of areas of mass wasting and deep-sea fan developments. TOBI data from selected sites along the Norwegian margin will be of considerable benefit for the group and for our understanding of the dynamics of the margin system. The scientific activities on the cruise are to run the TOBI seafloor imaging vehicle to provide a suite of geological observations on the detailed morphology and shallow seismic character of the sea floor within three target areas on the Norwegian margin, south of 68° N. These observations will complement existing data from previous cruises, where synoptic-scale morphological data, along with seismic architecture and core material, were acquired. |
| Chief scientist | Haflidi Haflidason (University of Bergen, Department of Earth Science) |
| Project | ENAM II/MASTIII |
| Coordinating body | GEOMAR |
| Ocean/sea areas | |
| General | Norwegian Sea |
| Specific | Norwegian Margin; North Sea Fan; Storegga Slide; Voring Plateau; Taernadjupet Slide; Voringplateau |
| Track charts |  |
| Measurements | |
| Geology and geophysics | |
| Single-beam echosounding | Quantity: track kilometres = 277 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey I: 4-6 July 1997. |
| Single-beam echosounding | Quantity: track kilometres = 50 Description: Seafloor bottom imagery mapping: (I) 3.5 kHz sub-bottom profiling system, (II) 10 kHz echosounding. Survey III continued: 18 July 1997. |
| Single-beam echosounding | Quantity: track kilometres = 545 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey III: 13-18 July 1997. |
| Single-beam echosounding | Quantity: track kilometres = 250 Description: Seafloor bottom imagery mapping: (I) 3.5 kHz sub-bottom profiling system, (II) 10 kHz echosounding. Survey II continued: 12-13 July 1997. |
| Single-beam echosounding | Quantity: track kilometres = 300 Description: Seafloor bottom imagery mapping: (I) 3.5 kHz sub-bottom profiling system, (II) 10 kHz echosounding. Survey I continued: 6-7 July 1997. |
| Multi-beam echosounding | Quantity: track kilometres = 634 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey II: 7-12 July 1997. |
| Long/short range side scan sonar | Quantity: track kilometres = 277 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey I: 4-6 July 1997. |
| Long/short range side scan sonar | Quantity: track kilometres = 545 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey III: 13-18 July 1997. |
| Long/short range side scan sonar | Quantity: track kilometres = 634 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey II: 7-12 July 1997. |
| Single channel seismic reflection | Quantity: track kilometres = 50 Description: Seafloor bottom imagery mapping: (I) 3.5 kHz sub-bottom profiling system, (II) 10 kHz echosounding. Survey III continued: 18 July 1997. |
| Single channel seismic reflection | Quantity: track kilometres = 277 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey I: 4-6 July 1997. |
| Single channel seismic reflection | Quantity: track kilometres = 300 Description: Seafloor bottom imagery mapping: (I) 3.5 kHz sub-bottom profiling system, (II) 10 kHz echosounding. Survey I continued: 6-7 July 1997. |
| Single channel seismic reflection | Quantity: track kilometres = 545 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey III: 13-18 July 1997. |
| Single channel seismic reflection | Quantity: track kilometres = 634 Description: Seafloor bottom imagery mapping: (I) TOBI (Towed Ocean Bottom Instrument), a short 30 kHz sidescan sonar, (II) 3.5 kHz sub-bottom profiling system, (III) 10 kHz echosounding. Survey II: 7-12 July 1997. |
| Single channel seismic reflection | Quantity: track kilometres = 250 Description: Seafloor bottom imagery mapping: (I) 3.5 kHz sub-bottom profiling system, (II) 10 kHz echosounding. Survey II continued: 12-13 July 1997. |
