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Nonchondritic 142Nd in suboceanic mantle peridotites

Anna Cipriani; Enrico Bonatti; Richard W. Carlson

Title:
Nonchondritic 142Nd in suboceanic mantle peridotites
Author(s):
Cipriani, Anna
Bonatti, Enrico
W. Carlson, Richard
Date:
Type:
Articles
Department(s):
Lamont-Doherty Earth Observatory
Volume:
3
Persistent URL:
Book/Journal Title:
Geochemistry, Geophysics, Geosystems
Abstract:
The discovery that several solid Earth reservoirs have a superchondritic 142Nd/144Nd ratio led to the hypothesis that either the bulk silicate Earth is not chondritic or that a subchondritic reservoir lies hidden somewhere within the Earth's interior. One important reservoir, i.e., mid-ocean ridge peridotites representing the main component of the upper oceanic mantle and the source of mid-ocean ridge basalt, has never been tested for 142Nd/144Nd. We determined the 142Nd/144Nd ratio in clinopyroxene separated from two peridotites and a pyroxenite from the SW Indian Ridge and one peridotite from the northern Mid-Atlantic Ridge. All samples analyzed have superchondritic 142Nd/144Nd ratios in line with mantle-derived material measured to date, except for some ancient cratonic rocks.
Subject(s):
Geochemistry
Publisher DOI:
http://dx.doi.org/10.1029/2010GC003415
Item views
166
Metadata:
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Suggested Citation:
Anna Cipriani, Enrico Bonatti, Richard W. Carlson, , Nonchondritic 142Nd in suboceanic mantle peridotites, Columbia University Academic Commons, .

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