An assessment of upper mantle heterogeneity based on abyssal peridotite isotopic compositions

J. M. Warren, N. Shimizu, Chie Sakaguchi, H. J B Dick, Eizou Nakamura

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

Abyssal peridotites, the depleted solid residues of ocean ridge melting, are the most direct samples available to assess upper oceanic mantle composition. We present detailed isotope and trace element analyses of pyroxene mineral separates from Southwest Indian Ridge abyssal peridotites and pyroxenites in order to constrain the size and length scale of mantle heterogeneity. Our results demonstrate that the mantle can be highly heterogeneous to 143Nd/144Nd and 87Sr/86Sr. Standard isotope evolution models of upper mantle composition do not predict the full isotopic range observed among abyssal peridotites, as they do not account adequately for the complexities of ancient and recent melting processes.

Original languageEnglish
Article numberB12203
JournalJournal of Geophysical Research B: Solid Earth
Volume114
Issue number12
DOIs
Publication statusPublished - 2009

Fingerprint

peridotite
Isotopes
upper mantle
Earth mantle
Melting
isotopic composition
mantle
Trace Elements
melting
Chemical analysis
isotope
Minerals
ridges
isotopes
pyroxene
trace elements
trace element
oceans
minerals
ocean

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

An assessment of upper mantle heterogeneity based on abyssal peridotite isotopic compositions. / Warren, J. M.; Shimizu, N.; Sakaguchi, Chie; Dick, H. J B; Nakamura, Eizou.

In: Journal of Geophysical Research B: Solid Earth, Vol. 114, No. 12, B12203, 2009.

Research output: Contribution to journalArticle

@article{a4a0fc26f9144f4ba5c0fc4bfde1cda3,
title = "An assessment of upper mantle heterogeneity based on abyssal peridotite isotopic compositions",
abstract = "Abyssal peridotites, the depleted solid residues of ocean ridge melting, are the most direct samples available to assess upper oceanic mantle composition. We present detailed isotope and trace element analyses of pyroxene mineral separates from Southwest Indian Ridge abyssal peridotites and pyroxenites in order to constrain the size and length scale of mantle heterogeneity. Our results demonstrate that the mantle can be highly heterogeneous to 143Nd/144Nd and 87Sr/86Sr. Standard isotope evolution models of upper mantle composition do not predict the full isotopic range observed among abyssal peridotites, as they do not account adequately for the complexities of ancient and recent melting processes.",
author = "Warren, {J. M.} and N. Shimizu and Chie Sakaguchi and Dick, {H. J B} and Eizou Nakamura",
year = "2009",
doi = "10.1029/2008JB006186",
language = "English",
volume = "114",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "12",

}

TY - JOUR

T1 - An assessment of upper mantle heterogeneity based on abyssal peridotite isotopic compositions

AU - Warren, J. M.

AU - Shimizu, N.

AU - Sakaguchi, Chie

AU - Dick, H. J B

AU - Nakamura, Eizou

PY - 2009

Y1 - 2009

N2 - Abyssal peridotites, the depleted solid residues of ocean ridge melting, are the most direct samples available to assess upper oceanic mantle composition. We present detailed isotope and trace element analyses of pyroxene mineral separates from Southwest Indian Ridge abyssal peridotites and pyroxenites in order to constrain the size and length scale of mantle heterogeneity. Our results demonstrate that the mantle can be highly heterogeneous to 143Nd/144Nd and 87Sr/86Sr. Standard isotope evolution models of upper mantle composition do not predict the full isotopic range observed among abyssal peridotites, as they do not account adequately for the complexities of ancient and recent melting processes.

AB - Abyssal peridotites, the depleted solid residues of ocean ridge melting, are the most direct samples available to assess upper oceanic mantle composition. We present detailed isotope and trace element analyses of pyroxene mineral separates from Southwest Indian Ridge abyssal peridotites and pyroxenites in order to constrain the size and length scale of mantle heterogeneity. Our results demonstrate that the mantle can be highly heterogeneous to 143Nd/144Nd and 87Sr/86Sr. Standard isotope evolution models of upper mantle composition do not predict the full isotopic range observed among abyssal peridotites, as they do not account adequately for the complexities of ancient and recent melting processes.

UR - http://www.scopus.com/inward/record.url?scp=77749337483&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77749337483&partnerID=8YFLogxK

U2 - 10.1029/2008JB006186

DO - 10.1029/2008JB006186

M3 - Article

AN - SCOPUS:77749337483

VL - 114

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 12

M1 - B12203

ER -