RRS James Clark Ross JR19970113 (JR18)
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS James Clark Ross (74JC) |
| Cruise identifier | JR19970113 (JR18) |
| Cruise period | 1997-01-13 — 1997-03-05 |
| Status | Completed |
| Port of departure | Stanley, Falkland Islands (Malvinas) |
| Port of return | Stanley, Falkland Islands (Malvinas) |
| Purpose | Research |
| Objectives | Cruise JR18 was devoted to controlled-source seismic investigations of the South Sandwich island arc. These investigations were part of the Sandwich Lithospheric and Crustal Experiment (SLICE), and integrated geological and geophysical study of the structure, geodynamics and composition of the arc. The main objective of the cruise was to collect four long mutlichannel seismic reflection profiles across the trench, arc and back-arc basin, recording wide-agle seismic data on ocean-bottom seismometers along two of these profiles. Three short multichannel seismic lines were also collected over a segment of the East Scotia Ridge where data from cruise JR09a (1995) had revealed the presence of a magma chamber. Magnetic and gravity data were collected along all seismic profile and passage tracks. Ocean-bottom seismometers were also deployed to augment a temporary local network of seismic stations set up on the islands by colleagues. |
| Chief scientist | Robert D Larter (British Antarctic Survey) |
| Project | Sandwich Lithospheric and Crustal Experiment (SLICE) |
| Coordinating body | BAS |
| Cruise report |  (4.41 MB) |
| Ocean/sea areas | |
| General | South Atlantic Ocean |
| Specific | Southern Ocean |
| Measurements | |
| Geology and geophysics | |
| Dredge | Quantity: number of hauls = 9 Description: A number of dredges were made during the cruise. |
| Core - soft bottom | Quantity: number of cores = 1 Description: A wax core was made during the cruise. |
| Single channel seismic reflection | Quantity: number of images = 23 Description: Wide-angle seismic data was collected along 2 profiles. |
| Multichannel seismic reflection | Quantity: number of profiles = 4 Description: Seismic reflection data was collected on a number of profiles. 2 of the profiles were short and 2 long. |
| Gravity measurements | Quantity: number of measurements = 1 Description: Gravity and magnetic data were collected on all of the profiles. No. of measurements not known. |
| Magnetic measurements | Quantity: number of measurements = 1 Description: Gravity and magnetic data were collected on all of the profiles. No. of measurements not known. |
