4.7 Article

Shallow sources of upper mantle seismic anisotropy in East Africa

Related references

Note: Only part of the references are listed.
Article Geochemistry & Geophysics

A Geodynamic Investigation of Plume-Lithosphere Interactions Beneath the East African Rift

Tahiry A. Rajaonarison et al.

Summary: Geodynamicists use high-resolution 3D thermomechanical models to investigate the forces driving continental rifting in the East African Rift. They find that the anomalous surface deformation and seismic anisotropy in the rift are primarily driven by northward mantle flow associated with the African Superplume.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2023)

Article Geochemistry & Geophysics

Mantle Wavespeed and Discontinuity Structure Below East Africa: Implications for Cenozoic Hotspot Tectonism and the Development of the Turkana Depression

A. Boyce et al.

Summary: Ethiopia's Cenozoic flood basalt magmatism, uplift, and rifting have been attributed to mantle plumes. However, the movement of the African plate has shifted the mantle beneath it, leading to a lack of knowledge regarding the mantle structure below the northern Tanzania craton and Turkana Depression. Using new seismograph data, a tomographic model is developed to map the mantle structure and reveal the presence of a previously unrecognized mantle plume tail. The thinning lithospheric structure and sub-lithospheric slow wavespeeds in the Turkana Depression suggest that the present-day low elevation is due to crustal thinning.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2023)

Article Geochemistry & Geophysics

Shear wave splitting measurements in northeastern Uganda and southeastern Tanzania: corroborating evidence for sublithospheric mantle flow beneath East Africa

Fenitra Andriampenomanana et al.

Summary: This study reports new shear wave splitting observations in East Africa, specifically in northeastern Uganda and southeastern Tanzania, revealing different fast polarization directions and splitting times. These findings help address the issue of limited data coverage due to geographical constraints in the region.

GEOPHYSICAL JOURNAL INTERNATIONAL (2021)

Article Multidisciplinary Sciences

Plume-driven recratonization of deep continental lithospheric mantle

Jingao Liu et al.

Summary: The study investigates the role of plume upwelling in the destruction and recratonization of roughly 200-kilometre-thick cratonic lithospheric mantle in the northern portion of the Slave craton affected by the Mackenzie plume event 1.27 billion years ago. The research shows how new melt residues produced by the plume event contribute to the healing and return to their original lithospheric thickness of cratons after substantial disruption of their roots. The findings suggest that this process may be widespread in the history of cratons and contribute to the diversity of mantle peridotites in terms of age and origin.

NATURE (2021)

Article Geochemistry & Geophysics

Accommodation of East African Rifting Across the Turkana Depression

E. Knappe et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2020)

Article Geosciences, Multidisciplinary

Preferential localized thinning of lithospheric mantle in the melt-poor Malawi Rift

Emily Hopper et al.

NATURE GEOSCIENCE (2020)

Article Geochemistry & Geophysics

Using Ambient Noise to Image the Northern East African Rift

Emma L. Chambers et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2019)

Article Geochemistry & Geophysics

Lowermost Mantle Anisotropy Beneath Africa From Differential SKS-SKKS Shear-Wave Splitting

M. C. Reiss et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2019)

Article Geochemistry & Geophysics

P Wave Teleseismic Traveltime Tomography of the North American Midcontinent

Trevor A. Bollmann et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2019)

Article Geosciences, Multidisciplinary

Activation of preexisting transverse structures in an evolving magmatic rift in East Africa

J. D. Muirhead et al.

JOURNAL OF STRUCTURAL GEOLOGY (2018)

Article Multidisciplinary Sciences

A Geodetic Strain Rate Model for the East African Rift System

D. S. Stamps et al.

SCIENTIFIC REPORTS (2018)

Editorial Material Geochemistry & Geophysics

SplitRacer: MATLAB Code and GUI for Semiautomated Analysis and Interpretation of Teleseismic Shear-Wave Splitting

Miriam Christina Reiss et al.

SEISMOLOGICAL RESEARCH LETTERS (2017)

Article Geochemistry & Geophysics

How craton margins are preserved: Insights from geodynamic models

Claire A. Currie et al.

JOURNAL OF GEODYNAMICS (2016)

Article Geosciences, Multidisciplinary

Seismic anisotropy of the lithosphere/asthenosphere system beneath the Rwenzori region of the Albertine Rift

B. Homuth et al.

INTERNATIONAL JOURNAL OF EARTH SCIENCES (2016)

Article Geochemistry & Geophysics

The offshore East African Rift System: Structural framework at the toe of a juvenile rift

Dieter Franke et al.

TECTONICS (2015)

Review Geochemistry & Geophysics

Heterogeneity and anisotropy in the lithospheric mantle

Andrea Tommasi et al.

TECTONOPHYSICS (2015)

Article Geochemistry & Geophysics

Anisotropy beneath a highly extended continental rift

Zachary Eilon et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2014)

Article Geochemistry & Geophysics

Seismic observations of large-scale deformation at the bottom of fast-moving plates

Eric Debayle et al.

EARTH AND PLANETARY SCIENCE LETTERS (2013)

Review Geosciences, Multidisciplinary

Orogen styles in the East African Orogen: A review of the Neoproterozoic to Cambrian tectonic evolution

H. Fritz et al.

JOURNAL OF AFRICAN EARTH SCIENCES (2013)

Article Geochemistry & Geophysics

Melt infiltration of the lower lithosphere beneath the Tanzania craton and the Albertine rift inferred from S receiver functions

Ingo Woelbern et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2012)

Article Geochemistry & Geophysics

Absolute plate motions in a reference frame defined by moving hot spots in the Pacific, Atlantic, and Indian oceans

Pavel V. Doubrovine et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2012)

Article Geosciences, Multidisciplinary

Initiation of the western branch of the East African Rift coeval with the eastern branch

E. M. Roberts et al.

NATURE GEOSCIENCE (2012)

Article Geochemistry & Geophysics

Geologically current motion of 56 plates relative to the no-net-rotation reference frame

Donald F. Argus et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2011)

Article Geochemistry & Geophysics

The non-commutivity of shear wave splitting operators at low frequencies and implications for anisotropy tomography

Paul G. Silver et al.

GEOPHYSICAL JOURNAL INTERNATIONAL (2011)

Article Geochemistry & Geophysics

How much magma is required to rift a continent?

Robert W. Bialas et al.

EARTH AND PLANETARY SCIENCE LETTERS (2010)

Article Geochemistry & Geophysics

Melt-induced seismic anisotropy and magma assisted rifting in Ethiopia: Evidence from surface waves

I. D. Bastow et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2010)

Article Geochemistry & Geophysics

Organized melt, seismic anisotropy, and plate boundary lubrication

Benjamin K. Holtzman et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2010)

Article Geosciences, Multidisciplinary

Lithospheric buoyancy forces in Africa from a thin sheet approach

D. S. Stamps et al.

INTERNATIONAL JOURNAL OF EARTH SCIENCES (2010)

Article Geochemistry & Geophysics

Statistical properties of seismic anisotropy predicted by upper mantle geodynamic models

Thorsten W. Becker et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2006)

Article Geochemistry & Geophysics

Finite-frequency vectorial tomography: a new method for high-resolution imaging of upper mantle anisotropy

S Chevrot

GEOPHYSICAL JOURNAL INTERNATIONAL (2006)

Article Multidisciplinary Sciences

Magma-assisted rifting in Ethiopia

JM Kendall et al.

NATURE (2005)

Article Geochemistry & Geophysics

Multichannel analysis of shear wave splitting

S Chevrot

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2000)

Article Geosciences, Multidisciplinary

New Fresnel-zone estimates for shear-wave splitting observations from finite-difference modeling

G Rümpker et al.

GEOPHYSICAL RESEARCH LETTERS (2000)