Thermo-rheological aspects of crustal evolution during continental breakup and melt intrusion: The Main Ethiopian Rift, East Africa

2016 ◽  
Vol 686 ◽  
pp. 51-62 ◽  
Author(s):  
Alessio Lavecchia ◽  
Fred Beekman ◽  
Stuart R. Clark ◽  
Sierd A.P.L. Cloetingh
Keyword(s):  
East Africa ◽  
Ethiopian Rift ◽  
Crustal Evolution ◽  
Main Ethiopian Rift ◽  
Continental Breakup

Off-axis volcano-tectonic activity during continental rifting: Insights from the transversal Goba-Bonga lineament, Main Ethiopian Rift (East Africa)

2018 ◽  
Vol 728-729 ◽  
pp. 75-91 ◽  
Author(s):  
Giacomo Corti ◽  
Federico Sani ◽  
Samuele Agostini ◽  
Melody Philippon ◽  
Dimitrios Sokoutis ◽  
...  
Keyword(s):  
East Africa ◽  
Tectonic Activity ◽  
Ethiopian Rift ◽  
Continental Rifting ◽  
Main Ethiopian Rift

Holocene extension direction along the Main Ethiopian Rift, East Africa

Terra Nova ◽  
2002 ◽  
Vol 14 (3) ◽  
pp. 191-197 ◽  
Author(s):  
V. Acocella ◽  
T. Korme
Keyword(s):  
East Africa ◽  
Ethiopian Rift ◽  
Main Ethiopian Rift ◽  
Extension Direction

Tectonics of the Asela‐Langano Margin, Main Ethiopian Rift (East Africa)

Tectonics ◽  
2020 ◽  
Vol 39 (8) ◽  
Author(s):  
Giacomo Corti ◽  
Federico Sani ◽  
Alessio A. Florio ◽  
Tim Greenfield ◽  
Derek Keir ◽  
...  
Keyword(s):  
East Africa ◽  
Ethiopian Rift ◽  
Main Ethiopian Rift

Topography, river network and recent fault activity at the margins of the Central Main Ethiopian Rift (East Africa)

2015 ◽  
Vol 664 ◽  
pp. 67-82 ◽  
Author(s):  
Paola Molin ◽  
Giacomo Corti
Keyword(s):  
East Africa ◽  
River Network ◽  
Ethiopian Rift ◽  
Fault Activity ◽  
Main Ethiopian Rift

scholarly journals Distribution of Quaternary deformation in the central Main Ethiopian Rift, East Africa

Tectonics ◽  
2011 ◽  
Vol 30 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Andrea Agostini ◽  
Marco Bonini ◽  
Giacomo Corti ◽  
Federico Sani ◽  
Piero Manetti
Keyword(s):  
East Africa ◽  
Ethiopian Rift ◽  
Main Ethiopian Rift ◽  
Quaternary Deformation

scholarly journals Control of Pre-rift Lithospheric Structure on the Architecture and Evolution of Continental Rifts: Insights From the Main Ethiopian Rift, East Africa

Tectonics ◽  
2018 ◽  
Vol 37 (2) ◽  
pp. 477-496 ◽  
Author(s):  
Giacomo Corti ◽  
Paola Molin ◽  
Andrea Sembroni ◽  
Ian D. Bastow ◽  
Derek Keir
Keyword(s):  
East Africa ◽  
Ethiopian Rift ◽  
Lithospheric Structure ◽  
Main Ethiopian Rift ◽  
Continental Rifts

scholarly journals Catching the Main Ethiopian Rift Evolving Towards Plate Divergence

2021 ◽  
Author(s):  
Eugenio Nicotra ◽  
Marco Viccaro ◽  
Paola Donato ◽  
Valerio Acocella ◽  
Rosanna Rosa
Keyword(s):  
Ethiopian Rift ◽  
Plate Boundaries ◽  
Magma Chambers ◽  
Evolutionary Processes ◽  
Main Ethiopian Rift ◽  
Continental Breakup ◽  
Rapid Propagation ◽  
Scoria Cones ◽  
Ti Content ◽  
Eruptive Fissures

Abstract Magmatism accompanies rifting along divergent plate boundaries, although its role before continental breakup remains poorly understood. For example, the magma-assisted Northern Main Ethiopian Rift (NMER) lacks current volcanism and clear tectono-magmatic relationships with its contiguous rift portions. Here we define its magmatic behaviour, identifying the most recent eruptive fissures (EF) whose aphyric basalts have a higher Ti content than those of older monogenetic scoria cones (MSC), which are porphyritic and plagioclase-dominated. Despite the similar parental melt, EF and MSC magmas underwent different evolutionary processes. While MSC magmas were stored at intermediate crustal levels, EF magmas rose directly from the Moho without contamination, even below older polygenetic volcanoes, suggesting rapid propagation of transcrustal dikes across solidified magma chambers. Whether this recent condition in the NMER is stable or transient, it highlights a transition from central polygenetic to linear fissure volcanism, indicative of increased tensile conditions and volcanism directly fed from the Moho, suggesting transition towards mature rifting.

scholarly journals Geothermal potential and origin of natural thermal fluids in the northern Lake Abaya area, Main Ethiopian Rift, East Africa

2017 ◽  
Vol 336 ◽  
pp. 1-18 ◽  
Author(s):  
A. Minissale ◽  
G. Corti ◽  
F. Tassi ◽  
T.H. Darrah ◽  
O. Vaselli ◽  
...  
Keyword(s):  
East Africa ◽  
Ethiopian Rift ◽  
Main Ethiopian Rift ◽  
Thermal Fluids ◽  
Geothermal Potential

scholarly journals Catching the Main Ethiopian Rift evolving towards plate divergence

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Eugenio Nicotra ◽  
Marco Viccaro ◽  
Paola Donato ◽  
Valerio Acocella ◽  
Rosanna De Rosa
Keyword(s):  
Evolutionary History ◽  
Ethiopian Rift ◽  
Plate Boundaries ◽  
Magma Chambers ◽  
Main Ethiopian Rift ◽  
Continental Breakup ◽  
Rapid Propagation ◽  
Scoria Cones ◽  
Ti Content ◽  
Eruptive Fissures

AbstractMagmatism accompanies rifting along divergent plate boundaries, although its role before continental breakup remains poorly understood. For example, the magma-assisted Northern Main Ethiopian Rift (NMER) lacks current volcanism and clear tectono-magmatic relationships with its contiguous rift portions. Here we define its magmatic behaviour, identifying the most recent eruptive fissures (EF) whose aphyric basalts have a higher Ti content than those of older monogenetic scoria cones (MSC), which are porphyritic and plagioclase-dominated. Despite these differences, calculations highlight a similar parental melt for EF and MSC products, suggesting only a different evolutionary history after melt generation. While MSC magmas underwent a further step of storage at intermediate crustal levels, EF magmas rose directly from the base of the crust without contamination, even below older polygenetic volcanoes, suggesting rapid propagation of transcrustal dikes across solidified magma chambers. Whether this recent condition in the NMER is stable or transient, it indicates a transition from central polygenetic to linear fissure volcanism, indicative of increased tensile conditions and volcanism directly fed from the base of the crust, suggesting transition towards mature rifting.

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