Pn wave velocities beneath the Tanzania Craton and adjacent rifted mobile belts, East Africa

Richard Brazier, Andrew Arnold Nyblade, C. A. Langston, T. J. Owens

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

P wave travel times from regional earthquakes recorded by the Tanzania Broadband Seismic Experiment have been inverted for long wavelength (>100 km) Pn velocity variations beneath Tanzania using a generalized inverse algorithm. Pn velocities, on average, are 8.40 to 8.45 km/s beneath the center of the Tanzania Craton, 8.30-8.35 km/s beneath the terminus of the Eastern Branch of the rift system, and 8.35-8.40 km/s beneath the Western Branch. These velocities indicate that there are no broad (>100 km wide) thermal anomalies in the uppermost mantle beneath areas of rifting in Tanzania, and suggest that thermal anomalies present deeper in the mantle have not yet reached the base of the crust.

Original languageEnglish (US)
Pages (from-to)2365-2368
Number of pages4
JournalGeophysical Research Letters
Volume27
Issue number16
DOIs
StatePublished - Aug 15 2000

Fingerprint

Tanzania
mobile belt
cratons
wave velocity
craton
temperature anomaly
mantle
Earth mantle
anomalies
travel time
rifting
P-wave
P waves
crust
travel
wavelength
earthquake
crusts
earthquakes
broadband

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

@article{14288cf315774a66a32b229c8a0bf7c3,
title = "Pn wave velocities beneath the Tanzania Craton and adjacent rifted mobile belts, East Africa",
abstract = "P wave travel times from regional earthquakes recorded by the Tanzania Broadband Seismic Experiment have been inverted for long wavelength (>100 km) Pn velocity variations beneath Tanzania using a generalized inverse algorithm. Pn velocities, on average, are 8.40 to 8.45 km/s beneath the center of the Tanzania Craton, 8.30-8.35 km/s beneath the terminus of the Eastern Branch of the rift system, and 8.35-8.40 km/s beneath the Western Branch. These velocities indicate that there are no broad (>100 km wide) thermal anomalies in the uppermost mantle beneath areas of rifting in Tanzania, and suggest that thermal anomalies present deeper in the mantle have not yet reached the base of the crust.",
author = "Richard Brazier and Nyblade, {Andrew Arnold} and Langston, {C. A.} and Owens, {T. J.}",
year = "2000",
month = "8",
day = "15",
doi = "10.1029/2000GL011586",
language = "English (US)",
volume = "27",
pages = "2365--2368",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "16",

}

Pn wave velocities beneath the Tanzania Craton and adjacent rifted mobile belts, East Africa. / Brazier, Richard; Nyblade, Andrew Arnold; Langston, C. A.; Owens, T. J.

In: Geophysical Research Letters, Vol. 27, No. 16, 15.08.2000, p. 2365-2368.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Pn wave velocities beneath the Tanzania Craton and adjacent rifted mobile belts, East Africa

AU - Brazier, Richard

AU - Nyblade, Andrew Arnold

AU - Langston, C. A.

AU - Owens, T. J.

PY - 2000/8/15

Y1 - 2000/8/15

N2 - P wave travel times from regional earthquakes recorded by the Tanzania Broadband Seismic Experiment have been inverted for long wavelength (>100 km) Pn velocity variations beneath Tanzania using a generalized inverse algorithm. Pn velocities, on average, are 8.40 to 8.45 km/s beneath the center of the Tanzania Craton, 8.30-8.35 km/s beneath the terminus of the Eastern Branch of the rift system, and 8.35-8.40 km/s beneath the Western Branch. These velocities indicate that there are no broad (>100 km wide) thermal anomalies in the uppermost mantle beneath areas of rifting in Tanzania, and suggest that thermal anomalies present deeper in the mantle have not yet reached the base of the crust.

AB - P wave travel times from regional earthquakes recorded by the Tanzania Broadband Seismic Experiment have been inverted for long wavelength (>100 km) Pn velocity variations beneath Tanzania using a generalized inverse algorithm. Pn velocities, on average, are 8.40 to 8.45 km/s beneath the center of the Tanzania Craton, 8.30-8.35 km/s beneath the terminus of the Eastern Branch of the rift system, and 8.35-8.40 km/s beneath the Western Branch. These velocities indicate that there are no broad (>100 km wide) thermal anomalies in the uppermost mantle beneath areas of rifting in Tanzania, and suggest that thermal anomalies present deeper in the mantle have not yet reached the base of the crust.

UR - http://www.scopus.com/inward/record.url?scp=0034352646&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034352646&partnerID=8YFLogxK

U2 - 10.1029/2000GL011586

DO - 10.1029/2000GL011586

M3 - Article

VL - 27

SP - 2365

EP - 2368

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 16

ER -