Sample ID: PLUM05WT - 54D Sample Type: Dredge


Cruise information: PLUM05WT
Start End
Cruise dates 1990-04-18 1990-05-22
Cruise ports Montevideo, Uruguay Recife, Brazil

SIO cruise id PLUM05WT
Cruise name PLUME LEG 5
Chief scientist Fox, Paul Jeff
Cruise narrative This research is designed to test several hypotheses concerning the dynamic processes responsible for creating the spatial and temporal variations in ridge geometry on the slow-intermediate spreading rate ridge system in the South Atlantic from 31-36S. The basic thrust of the experiments is to explore the nature of mantle convection in the vicinity of a spreading center and its role in modifying su rface geometry and morphology of the ridge-transform system.
Cruise ngdc number 15040213
Proposal title Mid-Atlantic Ridge Experiment



Sample information PLUM05WT
Start End
Date 1990-05-04 1990-05-04
Latitude -33.96 -34
Longitude -14.527 -14.5
Water depth (m) 3570 3596

SIO code PLUM05WT-54D
SIO sample number 54D
IGSN number SIO001655
Ship name T. Washington
Navigation type SATNAV/GPS-AUTO LOG GYRO+2D DOPPLER SPD
Sampling tool type dredge
Province ridge crest
Crustal age model (mybp) 0.184705



Sub-sample information
Sub-sample number 1
Siocode PLUM05WT-54D
Depth top (cm)
Depth bottom (cm)
Lithology
Texture
Composition
Geological age
Weight
Rock lithology igneous (extrusive/volcanic) - basalt - pillow
Rock min plagioclase (pg)
Weathering
Remark some samples exhibit fresh glass
Munsell code
Exhaust code
Comments 100LBS. -PILLOWS BASALTS WITH THICK DISRUPTED OUTER RINDS 2-3 INCHES THICK DISPLAYING TWO STAGES OF GROWTH -PILLOW FRAGMENTS.