Mantle transition zone thickness beneath Ross Island, the Transantarctic Mountains, and East Antarctica

Angela Marie Reusch, Andrew Arnold Nyblade, Margaret H. Benoit, Douglas A. Wiens, Sridhar Anandakrishnan, Donald Edward Voigt, Patrick J. Shore

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The thickness of the mantle transition zone beneath Ross Island, and parts of the Transantarctic Mountains and East Antarctic Craton has been mapped using data from the 2000-2003 Transantarctic Mountain Seismic Experiment to determine if, as indicated by some tomographic images, an upper mantle thermal anomaly centered beneath Ross Island is a deep-seated feature extending into the mantle transition zone. Some 2700 receiver functions have been stacked using a 3D velocity model, revealing Ps conversions from the mantle transition zone discontinuities at depths of 410 and 660 km. Results yield an average nearly uniform transition zone thickness (266 ± 10 km) that is slightly larger than the global average, implying that the upper mantle thermal anomaly does not likely extend into the transition zone. This finding favors explanations for the upper mantle thermal anomaly invoking a plume head or small-scale convection.

Original languageEnglish (US)
Article numberL12301
JournalGeophysical Research Letters
Volume35
Issue number12
DOIs
StatePublished - Jun 28 2008

Fingerprint

Antarctic regions
mountains
transition zone
Earth mantle
mantle
mountain
temperature anomaly
upper mantle
anomalies
cratons
craton
discontinuity
plume
convection
plumes
Antarctica
receivers
experiment

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences (miscellaneous)
  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Reusch, Angela Marie ; Nyblade, Andrew Arnold ; Benoit, Margaret H. ; Wiens, Douglas A. ; Anandakrishnan, Sridhar ; Voigt, Donald Edward ; Shore, Patrick J. / Mantle transition zone thickness beneath Ross Island, the Transantarctic Mountains, and East Antarctica. In: Geophysical Research Letters. 2008 ; Vol. 35, No. 12.
@article{da920d127f7643598e278778b2218ff9,
title = "Mantle transition zone thickness beneath Ross Island, the Transantarctic Mountains, and East Antarctica",
abstract = "The thickness of the mantle transition zone beneath Ross Island, and parts of the Transantarctic Mountains and East Antarctic Craton has been mapped using data from the 2000-2003 Transantarctic Mountain Seismic Experiment to determine if, as indicated by some tomographic images, an upper mantle thermal anomaly centered beneath Ross Island is a deep-seated feature extending into the mantle transition zone. Some 2700 receiver functions have been stacked using a 3D velocity model, revealing Ps conversions from the mantle transition zone discontinuities at depths of 410 and 660 km. Results yield an average nearly uniform transition zone thickness (266 ± 10 km) that is slightly larger than the global average, implying that the upper mantle thermal anomaly does not likely extend into the transition zone. This finding favors explanations for the upper mantle thermal anomaly invoking a plume head or small-scale convection.",
author = "Reusch, {Angela Marie} and Nyblade, {Andrew Arnold} and Benoit, {Margaret H.} and Wiens, {Douglas A.} and Sridhar Anandakrishnan and Voigt, {Donald Edward} and Shore, {Patrick J.}",
year = "2008",
month = "6",
day = "28",
doi = "10.1029/2008GL033873",
language = "English (US)",
volume = "35",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "12",

}

Mantle transition zone thickness beneath Ross Island, the Transantarctic Mountains, and East Antarctica. / Reusch, Angela Marie; Nyblade, Andrew Arnold; Benoit, Margaret H.; Wiens, Douglas A.; Anandakrishnan, Sridhar; Voigt, Donald Edward; Shore, Patrick J.

In: Geophysical Research Letters, Vol. 35, No. 12, L12301, 28.06.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Mantle transition zone thickness beneath Ross Island, the Transantarctic Mountains, and East Antarctica

AU - Reusch, Angela Marie

AU - Nyblade, Andrew Arnold

AU - Benoit, Margaret H.

AU - Wiens, Douglas A.

AU - Anandakrishnan, Sridhar

AU - Voigt, Donald Edward

AU - Shore, Patrick J.

PY - 2008/6/28

Y1 - 2008/6/28

N2 - The thickness of the mantle transition zone beneath Ross Island, and parts of the Transantarctic Mountains and East Antarctic Craton has been mapped using data from the 2000-2003 Transantarctic Mountain Seismic Experiment to determine if, as indicated by some tomographic images, an upper mantle thermal anomaly centered beneath Ross Island is a deep-seated feature extending into the mantle transition zone. Some 2700 receiver functions have been stacked using a 3D velocity model, revealing Ps conversions from the mantle transition zone discontinuities at depths of 410 and 660 km. Results yield an average nearly uniform transition zone thickness (266 ± 10 km) that is slightly larger than the global average, implying that the upper mantle thermal anomaly does not likely extend into the transition zone. This finding favors explanations for the upper mantle thermal anomaly invoking a plume head or small-scale convection.

AB - The thickness of the mantle transition zone beneath Ross Island, and parts of the Transantarctic Mountains and East Antarctic Craton has been mapped using data from the 2000-2003 Transantarctic Mountain Seismic Experiment to determine if, as indicated by some tomographic images, an upper mantle thermal anomaly centered beneath Ross Island is a deep-seated feature extending into the mantle transition zone. Some 2700 receiver functions have been stacked using a 3D velocity model, revealing Ps conversions from the mantle transition zone discontinuities at depths of 410 and 660 km. Results yield an average nearly uniform transition zone thickness (266 ± 10 km) that is slightly larger than the global average, implying that the upper mantle thermal anomaly does not likely extend into the transition zone. This finding favors explanations for the upper mantle thermal anomaly invoking a plume head or small-scale convection.

UR - http://www.scopus.com/inward/record.url?scp=50849089648&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50849089648&partnerID=8YFLogxK

U2 - 10.1029/2008GL033873

DO - 10.1029/2008GL033873

M3 - Article

VL - 35

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 12

M1 - L12301

ER -