Skip to main content

Table 2 Atlantis Bank seafloor samples (N = 937)

From: The Atlantis Bank Gabbro Massif, Southwest Indian Ridge

LithologyN%C-PBrittleOxide %
Metaperidotite11543.42.31.5    
Plagioclase peridotite93.410.5    
Lherzolite10840.80.70.8    
Harzburgite103.810.5    
Talc-soapstone-serpentinite-tremolite schist and breccia238.7ndnd    
Total peridotites26528.31.41.4    
Olivine websterite60.60.80.8    
Dunite30.3ndnd    
Troctolite10.20.7na    
Olivine gabbro15633.91.21.21.21.4  
Gabbro367.81.81.12.21.8  
Gabbronorite214.61.60.70.70.4  
Oxide gabbro18339.81.81.50.816.71.5
Metagabbro418.92.31.32.31.6  
Felsic vein/plagiogranite224.80.50.80.60.7  
Total gabbros46049.1      
Aphyric diabase8656.2      
Olivine diabase53.3      
Plagioclase-olivine diabase1811.8      
Plagioclase diabase4428.8      
Total diabase15316.3001.71.3  
Aphyric basalt2044.4      
Olivine basalt715.6      
Plagioclase-olivine basalt1124.4      
Plagioclase-olivine augite basalt12.2      
Plagioclase basalt613.3      
Total basalt454.8      
Pillow basalt19       
Mafic mylonite/cataclasite30.3      
Oxidized sulfide chimney20.2      
  1. Note: C-P = average crystal-plastic deformation grade on a scale of 0 to 5. Brittle stands for brittle deformation grade on a scale of 0 to 4