RRS Charles Darwin CD80
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD80 |
| Cruise period | 1993-09-01 — 1993-10-01 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Reykjavík, Iceland |
| Purpose | Research |
| Objectives | 1. To determine the geochemistry of AVR's of different morphology, between 57 degrees 30 mins north and 62 degrees 30 mins north, and thereby assess the relationship between petrogenesis and the volcanic and tectonic evolution of crust forming the axial valley and crest.
2. To measure the geochemical variation among intermediate-wavelength ridge-segments, between 63N and 57N, and hence to explore the behaviour of shallow mantle flow beneath constructive plate-margins. 3. To detect the geochemical influence of the Icelandic hot-spot mantle plume with distance along the Reykjanes Ridge, between 63N and 57N, and to assess its influence on the style of oceanic spreading. 4. To observe the occurrence and compositional variation of hydrothermal deposits along the axial valley, between 62 degrees 30 mins north and 57 degrees 30 mins north, and hence to assess the relationship of hydrothermal activity with the petrogenetic and tectonic evolution of constructive plate-margins. |
| Chief scientist | Bramley J Murton (Institute of Oceanographic Sciences Deacon Laboratory) |
| Project | PETROS (PETROgenesis of Oblique Spreading) |
| Cruise report |  (2.17 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Specific | Reykjanes Ridge between 57 and 63N |
| Track charts | (0.02 MB) |
| Measurements | |
| Geology and geophysics | |
| Dredge | Quantity: number of deployments = 186 |
| Geophysical measurements made at depth | |
| Multi-beam echosounding |
