1887
PDF

Abstract

Petrological and geochemical variations along the South Atlantic Ridge show that eruption temperatures for the South Atlantic Ridge primitive basaltic glasses (MG#>64) decrease systematically along the ridge to the south from 0° to 42°S which appears to be related to the lower mantle temperature gradient. The lower mantle (below the 650 km discontinuity) beneath the South Atlantic shows a lower seismic P wave velocity with a gradual increase southward (around 42°S) (Dziewonski, 1984). This seismic velocity is related to temperature, or degree of melt, where higher seismic P wave velocities indicate colder material. The lower mantle temperature also seems to play an important role in controlling the degree and volume of melting along the South Atlantic Ridge.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609-pdb.299.295
1997-11-07
2024-03-28
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.299.295
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error