Tectono-thermal evolution of a long-lived segment of the East African Rift System: Thermochronological insights from the North Lokichar Basin, Turkana, Kenya

2018 ◽  
Vol 744 ◽  
pp. 23-46 ◽  
Author(s):  
Samuel C. Boone ◽  
Barry P. Kohn ◽  
Andrew J.W. Gleadow ◽  
Christopher K. Morley ◽  
Christian Seiler ◽  
...  
Keyword(s):  
Thermal Evolution ◽  
East African Rift ◽  
Rift System ◽  
East African Rift System ◽  
East African ◽  
The North ◽  
African Rift

Seismic wave attenuation in the lithosphere of the North Tanzanian divergence zone (East African rift system)

2017 ◽  
Vol 58 (2) ◽  
pp. 253-265 ◽  
Author(s):  
A.A. Dobrynina ◽  
J. Albaric ◽  
A. Deschamps ◽  
J. Perrot ◽  
R.W. Ferdinand ◽  
...  
Keyword(s):  
Seismic Wave ◽  
Wave Attenuation ◽  
East African Rift ◽  
Rift System ◽  
East African Rift System ◽  
East African ◽  
Seismic Wave Attenuation ◽  
The North ◽  
African Rift

Birth of the East African Rift System: Nucleation of magmatism and strain in the Turkana Depression

Geology ◽  
2019 ◽  
Vol 47 (9) ◽  
pp. 886-890 ◽  
Author(s):  
Samuel C. Boone ◽  
Barry P. Kohn ◽  
Andrew J.W. Gleadow ◽  
Christopher K. Morley ◽  
Christian Seiler ◽  
...  
Keyword(s):  
Hanging Wall ◽  
Critical Role ◽  
East African Rift ◽  
Southern Ethiopia ◽  
Rift System ◽  
East African Rift System ◽  
East African ◽  
The North ◽  
Basement Rocks ◽  
African Rift

Abstract The Turkana Depression of northern Kenya and southern Ethiopia contains voluminous plume-related basalts that mark the onset of the Paleogene–recent East African Rift System (EARS) at ca. 45 Ma. Thus, the Turkana Depression is crucial to understanding the inception of intracontinental rifting. However, the precise chronology of early rift-basin formation in Turkana is poorly constrained. We present apatite fission-track and (U-Th-Sm)/He thermochronology data from basement rocks from the margins of the north-south–trending Lokichar Basin that constrain the onset of rift-related cooling. Thermal history modeling of these data documents pronounced Eocene to Miocene denudational cooling of the basin-bounding Lokichar fault footwall. These results, along with ∼7 km of Paleogene to middle Miocene syn-rift strata preserved in the Lokichar fault hanging wall, suggest that formation of the Lokichar Basin began as early as ca. 45–40 Ma. Preexisting lithospheric heterogeneities inherited from earlier Mesozoic rifting and Eocene plume magmatism likely facilitated the broadly concurrent nucleation of strain in the Turkana Depression, up to ∼15 m.y. earlier than EARS initiation elsewhere. Late Paleogene extension in the Lokichar Basin and other parts of Turkana significantly predate the Miocene creation of pronounced plume-related topography in East Africa, suggesting that other mechanism(s), such as far-field stresses or mantle basal drag, likely played a critical role during EARS inception.

TECTONOMAGMATIC EVOLUTION OF THE EAST AFRICAN RIFT SYSTEM AS DOCUMENTED IN WEST TURKANA, KENYA

2017 ◽  
Author(s):  
Sara Mana ◽  
◽  
Merry Yue Cai ◽  
Catherine C. Beck ◽  
Steven L. Goldstein
Keyword(s):  
East African Rift ◽  
Rift System ◽  
East African Rift System ◽  
East African ◽  
African Rift

PLIO-PLEISTOCENE PALEOENVIRONMENTS IN WEST TURKANA (EAST AFRICAN RIFT SYSTEM, KENYA)

2020 ◽  
Author(s):  
Alexis Nutz ◽  
◽  
Mathieu Schuster ◽  
Doris Barboni ◽  
Ghislain Gassier ◽  
...  
Keyword(s):  
East African Rift ◽  
Rift System ◽  
East African Rift System ◽  
East African ◽  
African Rift

scholarly journals Innovative tephra studies in the East African Rift System

Eos ◽  
2005 ◽  
Vol 86 (27) ◽  
pp. 255 ◽  
Author(s):  
Giday WoldeGabriel ◽  
William K. Hart ◽  
Grant Heiken
Keyword(s):  
East African Rift ◽  
Rift System ◽  
East African Rift System ◽  
East African ◽  
African Rift

scholarly journals Volcanic activity and hazard in the East African Rift Zone

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Juliet Biggs ◽  
Atalay Ayele ◽  
Tobias P. Fischer ◽  
Karen Fontijn ◽  
William Hutchison ◽  
...  
Keyword(s):  
Volcanic Activity ◽  
East African Rift ◽  
Volcanic Hazards ◽  
Crisis Response ◽  
Sub Saharan Africa ◽  
Rift System ◽  
East African Rift System ◽  
East African ◽  
Sub Saharan ◽  
African Rift

AbstractOver the past two decades, multidisciplinary studies have unearthed a rich history of volcanic activity and unrest in the densely-populated East African Rift System, providing new insights into the influence of rift dynamics on magmatism, the characteristics of the volcanic plumbing systems and the foundation for hazard assessments. The raised awareness of volcanic hazards is driving a shift from crisis response to reducing disaster risks, but a lack of institutional and human capacity in sub-Saharan Africa means baseline data are sparse and mitigating geohazards remains challenging.

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