3D development of detachment faulting during continental breakup
نویسندگان
چکیده
منابع مشابه
The initiation of segmented buoyancy-driven melting during continental breakup
Melting of the mantle during continental breakup leads to magmatic intrusion and volcanism, yet our understanding of the location and dominant mechanisms of melt generation in rifting environments is impeded by a paucity of direct observations of mantle melting. It is unclear when during the rifting process the segmented nature of magma supply typical of seafloor spreading initiates. Here, we u...
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The frequent formation of large igneous provinces during the opening of the Atlantic Ocean is a surface manifestation of the thermal and chemical state of convecting mantle beneath the supercontinent Pangea. Recent geochemical and geophysical findings from the North Atlantic igneous province all point to the significant role of incomplete mantle mixing in igneous petrogenesis. On the basis of a...
متن کاملCapturing magma intrusion and faulting processes during continental rupture: seismicity of the Dabbahu (Afar) rift
C. J. Ebinger,1,2 D. Keir,2,3 A. Ayele,4 E. Calais,5 T. J. Wright,3 M. Belachew,1,4 J. O. S. Hammond,6 E. Campbell1 and W. R. Buck7 1Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY 14627, USA. E-mail: [email protected] 2Department of Geology, Royal Holloway University of London, Egham, TW20 0EX, UK 3School of Earth and Environmental Sciences, Uni...
متن کاملMantle thermal structure and active upwelling during continental breakup in the North Atlantic
Seismic reflection and refraction data acquired on four transects spanning the Southeast Greenland rifted margin and Greenland^Iceland Ridge (GIR) provide new constraints on mantle thermal structure and melting processes during continental breakup in the North Atlantic. Maximum igneous crustal thickness varies along the margin from s 30 km in the near-hotspot zone (6 500 km from the hotspot tra...
متن کاملMapping the evolving strain field during continental breakup from crustal anisotropy in the Afar Depression
Rifting of the continents leading to plate rupture occurs by a combination of mechanical deformation and magma intrusion, yet the spatial and temporal scales over which these alternate mechanisms localize extensional strain remain controversial. Here we quantify anisotropy of the upper crust across the volcanically active Afar Triple Junction using shear-wave splitting from local earthquakes to...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2019
ISSN: 0012-821X
DOI: 10.1016/j.epsl.2019.03.018