Constraints on mantle melting at mid-ocean ridges from global U-238-Th-230 disequilibrium data

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Journal Article
Year of Publication: 
1996
Authors: 
Bourdon, B.; Zindler, A.; Elliott, T.; Langmuir, C. H.
Editor: 
Journal Title: 
Nature
Journal Date: 
Nov 21
Place Published: 
Tertiary Title: 
Volume: 
384
Issue: 
6606
Pages: 
231-235
Section / Start page: 
Publisher: 
ISBN Number: 
0028-0836
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:A1996VU38100041
LDEO Publication Number: 
Call Number: 
Key Words: 
east pacific rise; ra-226 th-230 disequilibrium; radioactive disequilibria; isotope geochemistry; u-238 th-230-ra-226; basaltic magmas; reykjanes ridge; atlantic ridge; gorda ridges; sr;
Abstract: 

The extent of radioactive disequilibrium between U-238 and its daughter product Th-230 in midocean-ridge basalts from around the world is negatively correlated with axial ridge depth; local positive correlations with inferred mantle source composition are also observed. The larger Th-230 excesses seen in samples from shallow ridges reflect a larger melt contribution from a garnet-bearing source which may be explained by a deepening of the solidus in hotter mantle regions. These observations provide important constraints for modelling melt generation at mid-ocean ridges.

Notes: 

Vu381Times Cited:70Cited References Count:50

URL: 
<Go to ISI>://A1996VU38100041
DOI: