Results 21 to 30 of about 171,248 (333)
A role for subducted albite in the water cycle and alkalinity of subduction fluids [PDF]
Nature Communications, 2021 AbstractAlbite is one of the major constituents in the crust. We report here that albite, when subjected to hydrous cold subduction conditions, undergoes hitherto unknown breakdown into hydrated smectite, moganite, and corundum, above 2.9 GPa and 290 °C or about 90 km depth conditions, followed by subsequent breakdown of smectite into jadeite above 4.3
Gil Chan Hwang +8 more
openaire +4 more sources
A transdisciplinary and community-driven database to unravel subduction zone initiation
Nature Communications, 2020 Subduction zones are pivotal for the recycling of Earth’s outer layer into its interior. However, the conditions under which new subduction zones initiate are enigmatic.
F. Crameri +13 more
semanticscholar +1 more source
Evolution of Subduction Cusps From the Perspective of Trench Migration and Slab Morphology
Frontiers in Earth Science, 2021 The geometries of trenches vary worldwide due to continuous plate boundary reorganization. When two trenches intersect to generate a corner, a subduction cusp is formed.
Hui Zhao +5 more
doaj +1 more source
Slab2, a comprehensive subduction zone geometry model
Science, 2018 Detailing subduction zones Subduction zones are responsible for the most-damaging and tsunami-generating great earthquakes. Hayes et al. updated their Slab1.0 model to include all seismically active subduction zones, including geometrically complex ...
G. Hayes +6 more
semanticscholar +1 more source
Horizontal mantle flow controls subduction dynamics [PDF]
, 2017 It is generally accepted that subduction is driven by downgoing-plate negative buoyancy. Yet plate age –the main control on buoyancy– exhibits little correlation with most of the present-day subduction velocities and slab dips. “West”-directed subduction
Dal Zilio, Luca +3 more
core +1 more source
Modelling the closure of narrow oceanic basins by means of numerical simulations [PDF]
Tehnika, 2021 Numerical simulations represent an established approach in investigation of geodynamic processes in the Earth's interior and it is applied to a vast variety of geological problems. The closure of a narrow oceanic realm is modelled in this paper. Firstly,
Stanković Nikola B.
doaj +1 more source
Evolving force balance during incipient subduction [PDF]
, 2004 Nearly half of all active subduction zones initiated during the Cenozoic. All subduction zones associated with active back arc extension have initiated since the Eocene, hinting that back arc extension may be intimately associated with an interval ...
Gurnis, Michael, Hall, Chad, Lavier, Luc
core +1 more source
Kinematics of subduction and subduction‐induced flow in the upper mantle [PDF]
Journal of Geophysical Research: Solid Earth, 2004 Results of fluid dynamical experiments are presented to model the kinematics of lithospheric subduction in the upper mantle. The experiments model a dense high‐viscosity plate (subducting lithosphere) overlying a less dense low‐viscosity layer (upper mantle). The overriding lithosphere is not incorporated.
Wouter P. Schellart, Wouter P. Schellart
openaire +3 more sources
Plume‐Induced Subduction Initiation: Single‐Slab or Multi‐Slab Subduction? [PDF]
Geochemistry, Geophysics, Geosystems, 2020 AbstractInitiation of subduction following the impingement of a hot buoyant mantle plume is one of the few scenarios that allow breaking the lithosphere and recycling a stagnant lid without requiring any preexisting weak zones. Here, we investigate factors controlling the number and shape of retreating subducting slabs formed by plume‐lithosphere ...
Marzieh Baes +3 more
openaire +8 more sources
The convergence history of India-Eurasia records multiple subduction dynamics processes
Science Advances, 2020 Reunion plume push set in motion a sequence of events speeding up India, starting with initiation of double subduction. During the Cretaceous, the Indian plate moved towards Eurasia at the fastest rates ever recorded.
A. E. Pusok, D. Stegman
semanticscholar +1 more source