scholarly journals Fault-magma interactions during early continental rifting: Seismicity of the Magadi-Natron-Manyara basins, Africa

2017 ◽  
Vol 18 (10) ◽  
pp. 3662-3686 ◽  
Author(s):  
A. Weinstein ◽  
S. J. Oliva ◽  
C. J. Ebinger ◽  
S. Roecker ◽  
C. Tiberi ◽  
...  
Keyword(s):  
Continental Rifting

Pre-existing basement structure and its influence on continental rifting and fracture zone development along Australia’s southern rifted margin

2013 ◽  
Vol 170 (2) ◽  
pp. 365-377 ◽  
Author(s):  
G. M. Gibson ◽  
J. M. Totterdell ◽  
L. T. White ◽  
C. H. Mitchell ◽  
A. R. Stacey ◽  
...  
Keyword(s):  
Fracture Zone ◽  
Continental Rifting ◽  
Basement Structure ◽  
Zone Development ◽  
Rifted Margin

Permo-Triassic anatexis, continental rifting and the disassembly of western Pangaea

Lithos ◽  
2014 ◽  
Vol 190-191 ◽  
pp. 383-402 ◽  
Author(s):  
Ryan Cochrane ◽  
Richard Spikings ◽  
Axel Gerdes ◽  
Alexey Ulianov ◽  
Andres Mora ◽  
...  
Keyword(s):  
Continental Rifting

Influence of continental rifting on sedimentation and its provenance and geodynamic implications: An example from late Paleoproterozoic Chandil Formation, eastern India

2021 ◽  
pp. 103868
Author(s):  
Priyanka Chatterjee ◽  
Shuvabrata De ◽  
Rajat Mazumder ◽  
Tohru Ohta ◽  
Jeff Chiarenzelli ◽  
...  
Keyword(s):  
Continental Rifting ◽  
Eastern India

Early Cretaceous bimodal magmatism in the eastern Tethyan Himalayas, Tibet: Indicative of records on precursory continental rifting and initial breakup of eastern Gondwana

Lithos ◽  
2019 ◽  
Vol 324-325 ◽  
pp. 699-715 ◽  
Author(s):  
Yihong Tian ◽  
Junfeng Gong ◽  
Hanlin Chen ◽  
Lishuang Guo ◽  
Qinqin Xu ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Continental Rifting

scholarly journals Fluid–rock interactions along detachment faults during continental rifting and mantle exhumation: the case of the Urdach lherzolite body (North Pyrenees)

2020 ◽  
pp. jgs2020-116
Author(s):  
Jehiel Nteme Mukonzo ◽  
Marie-Christine Boiron ◽  
Yves Lagabrielle ◽  
Michel Cathelineau ◽  
Benoit Quesnel
Keyword(s):  
Fluid Flow ◽  
Continental Crust ◽  
Continental Rifting ◽  
Detachment Faults ◽  
The North ◽  
And Migration ◽  
Mantle Exhumation ◽  
Crucial Part

The North Pyrenean Zone corresponds to the palaeopassive margin of the North Iberia plate, at the foot of which subcontinental mantle was exhumed during Albian times. Rare bodies of exhumed mantle rocks associated with strongly sheared lenses of continental crust are scattered among the North Pyrenean Zone metasediments. Significant fluid flow occurred along a major décollement at the basement–Trias interface in the Urdach massif (Chaînons Béarnais). Fluids with a broad range of salinity (10–38 wt.% NaCl equiv.), indicative of mixing between brines and more dilute waters, produced strong silicification of breccias. The brines circulated at c. 240–280°C under lithostatic pressures at c. 6 ± 1 km depth. The fluids became increasingly saline towards the final stages. The syndeposition of Cenomano-Turonian flysch layers then progressively isolated the lower aquifers close to the décollement where Triassic brines were predominant. The release and migration of significant volumes of brines during stretching and squeezing of the Triassic evaporites played a crucial part in the mineralogical and rheological transformations that occurred during the Pyrenean Cretaceous rifting event.

scholarly journals Transition from continental rifting to oceanic spreading in the northern Red Sea area

2021 ◽  
Author(s):  
Sami El Khrepy ◽  
Ivan Koulakov ◽  
Nassir Al-Arifi ◽  
Mamdouh S. Alajmi ◽  
Ayman N. Qadrouh
Keyword(s):  
Red Sea ◽  
Plate Tectonics ◽  
Continental Rifting ◽  
Low Velocity ◽  
Lower Velocity ◽  
Velocity Anomaly ◽  
Oceanic Spreading ◽  
Lithospheric Extension ◽  
Sea Area ◽  
Northern Red Sea

<p><strong>Lithosphere extension, which plays an essential role in plate tectonics, occurs both in continents (as rift systems) and oceans (spreading along mid-oceanic ridges). The northern Red Sea area is a unique natural geodynamic laboratory, where the ongoing transition from continental rifting to oceanic spreading can be observed. Here, we analyze travel time data from a merged catalogue provided by the Egyptian and Saudi Arabian seismic networks to build a three-dimensional model of seismic velocities in the crust and uppermost mantle beneath the northern Red Sea and surroundings. The derived structures clearly reveal a high-velocity anomaly coinciding with the Red Sea basin and a narrow low-velocity anomaly centered along the rift axis. We interpret these structures as a transition of lithospheric extension from continental rifting to oceanic spreading. The transitional lithosphere is manifested by a dominantly positive seismic anomaly indicating the presence of a 50–70-km-thick and 200–300-km-wide cold lithosphere. Along the forming oceanic ridge axis, an elongated low-velocity anomaly marks a narrow localized nascent spreading zone that disrupts the transitional lithosphere. Along the eastern margins of the Red Sea, the lithosphere is disturbed by the lower-velocity anomalies coinciding with areas of basaltic magmatism.</strong></p>

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