IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Redox heterogeneity in mid-ocean ridge basalts as a function of mantle source
Cottrell, E.; Kelley, K.A. (2013). Redox heterogeneity in mid-ocean ridge basalts as a function of mantle source. Science (Wash.) 340(6138): 1314-1317. hdl.handle.net/10.1126/science.1233299
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075, more
Peer reviewed article  

Available in Authors 

Keyword
    Marine

Authors  Top 
  • Cottrell, E.
  • Kelley, K.A.

Abstract
    The oxidation state of Earth’s upper mantle both influences and records mantle evolution, but systematic fine-scale variations in upper mantle oxidation state have not previously been recognized in mantle-derived lavas from mid-ocean ridges. Through a global survey of mid-ocean ridge basalt glasses, we show that mantle oxidation state varies systematically as a function of mantle source composition. Negative correlations between Fe3+/SFe ratios and indices of mantle enrichment—such as 87Sr/86Sr, 208Pb/204Pb, Ba/La, and Nb/Zr ratios—reveal that enriched mantle is more reduced than depleted mantle. Because carbon may act to simultaneously reduce iron and generate melts that share geochemical traits with our reduced samples, we propose that carbon creates magmas at ridges that are reduced and enriched.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors