RRS Charles Darwin CD35
Cruise summary report
|Ship name (ship code)||RRS Charles Darwin (74AB)|
|Cruise period||1988-10-13 — 1988-11-17|
|Port of departure||Papeete, French Polynesia|
|Port of return||Valparaiso, Chile|
|Objectives||1. To run GLORIA over a well defined micro-plate, imaging as much of the plate as possible.
2. Thus to completely determine the position and nature of the present microplate boundaries.
3. To determine as far as possible the tectonic history of the microplate from its inception to the present.
4. To digitally combine GLORIA, SeaBeam and SeaMARC II data to provide for the first time a combined topographic and sidescan image of a tectonic plate.
5. On passage to the microplate, to obtain GLORIA and other data relevant to the tectonic history of the region, and particulary to improve knowledge of the distribution of fracture zones and volcanic chains between Tahiti and the Easter microplate.
6. On passage from the microplate, to obtain GLORIA and other data relevant to the tectonic history of the region; particularly to determine the precise position and azimuth of the Chile transform fault, and thus to improve the precision of the Nazca-Antarctic rotation pole.
|Chief scientist||Roger C Searle (Institute of Oceanographic Sciences Wormley Laboratory)|
|Cruise report||(0.74 MB)|
|General||South West Pacific Ocean (limit 140W)|
South East Pacific Ocean (limit 140W)
|Specific||East Pacific Rise|
|Geology and geophysics|
|Multi-beam echosounding||Quantity: track kilometres = 15000|
|Long/short range side scan sonar||Quantity: track kilometres = 12500|
|Gravity measurements||Quantity: track kilometres = 15000|
|Magnetic measurements||Quantity: track kilometres = 15000|