PI Country:
UK
PI Country:
France
PIs:
D. Teagle; B. Ildefonse
Institution:
NOC, Southampton; Universite Montpellier
Ocean:
N. Pacific
Year:
2011
Start Date:
17 April 2011
End Date:
20 May 2011 1) Deepen Hole 1256D as far as technically possible (>500 m) into gabbro to complete sampling of a complete section of upper oceanic crust
2) Test models of mid-ocean ridge crustal accretion in particular the formation of the lower crust by the recrystallization and subsidence of a high level magma chamber (gabbro glacier) versus crustal accretion by intrusion of sills through out the lower crust.
3) Establish magmatic, hydrothermal, tectonic processes and interactions. Is the plutonic crust cooled by conduction or hydrothermal circulation?
4) Determine the geological nature of layer 3 and the layer 2/3 boundary at Site 1256
5) Determine the magnetic contribution of the lower crust?
Ship:
JOIDES Resolution 
