Sample ID: PLUM05WT - 61D 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 1990-05-12 1990-05-12
Latitude -32.085 -32.1
Longitude -13.392 -13.4
Water depth (m) 3971 2995

SIO code PLUM05WT-61D
SIO sample number 61D
IGSN number SIO001662
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) 1.14086



Sub-sample information
Sub-sample number 1
Siocode PLUM05WT-61D
Depth top (cm)
Depth bottom (cm)
Lithology
Texture
Composition
Geological age
Weight
Rock lithology igneous (intrusive/plutonic) - gabbro
Rock min plagioclase (pg)
Weathering
Remark some samples exhibit fresh glass
Munsell code
Exhaust code
Comments 70LBS. -MICRO GABBRO -ONE SMALL SAMPLE OF BASALT WITH GLASSY RIND.