FS Meteor M60/2

Cruise summary report

Cruise Info. 
Ship name (ship code)FS Meteor (06M3)
Cruise identifierM60/2
Cruise period2003-12-09 — 2004-01-12
Port of departureFunchal, Portugal
Port of returnFort-de-France, Martinique
ObjectivesMid-Atlantic Expedition 2003-2004
Leg 2. The objective was to use active seismic refraction and passive microearthquake and teleseismic imaging methods to study the crust, uppermost mantle, and deformation associated with active ridge propagation in a median valley environment, studying the actively propagating ridge segment from 21.2-22°S along the Mid-Atlantic Ridge. The active seismic experiment used 4 18-instrument, 120-km-long refraction lines, two in the across-axis direction, two in the along-axis direction, to determine the crustal thickness and velocity structure along and across this median valley segment of the spreading centre. The seismic source was two 32-liter airguns. The passive experiment redeployed these 18 instruments at the end of the field program to record 6 months of local microseismic (and global teleseismic) activity - also shooting to this array to better constrain the crustal structure beneath each station.

The data collected will be used for two different passive seismic investigations with different goals; a local microseismicity study to study lithospheric deformation processes within this region, and a regional tomographic-type study to image along-axis changes in the structure of mantle upwelling beneath this section of the ridge.
Chief scientistJason Phipps Morgan (Institute of Marine Sciences, Kiel)
Cruise reportFS Meteor M60/2 cruise report meteor_m60.pdf (9.34 MB) 
Ocean/sea areas 
GeneralNorth West Atlantic Ocean (limit 40W)
SpecificMid-Atlantic Ridge