Results 101 to 110 of about 29,724 (300)
Sedimentology, EarlyView.ABSTRACT Establishing depositional environments in ancient mudstone successions from epeiric seas is difficult due to the lack of obvious lithological changes, leaving long, largely undifferentiated mudstone intervals that complicate their correlation to near‐shore environments.
Jeremy J. Gabriel +5 more
wiley +1 more source
Tohoku earthquake: a surprise? [PDF]
arXiv, 2011 We consider three questions related to the 2011 Tohoku mega-earthquake: (1) Why was the event size so grossly under-estimated? (2) How should we evaluate the chances of giant earthquakes in subduction zones? and (3) What is the repeat time for magnitude 9 earthquakes off the Tohoku coast?
arxiv
Sedimentology, EarlyView.ABSTRACT Sedimentary infill patterns in the Eastern Gobi Basin of southern Mongolia record a complex, polyphased history. Asynchronous timing and intensities of extensional tectonism during the Early Cretaceous fragmented the Eastern Gobi Basin into a series of sub‐basins within an extensional rift (horst‐graben) setting, which likely infilled ...
Jesse Benjamin van Niekerk +7 more
wiley +1 more source
Geochemistry, Geophysics, GeosystemsIn the regime of plate tectonics, the subduction of an oceanic plate generally terminates with the collision and accretion of continental terranes. Then, a new subduction zone may form in the neighboring oceanic plates, which is defined as the terrane ...
Fengyuan Cui, Zhong‐Hai Li
doaj +1 more source
Subduction Zone Effect on the Structure of the Small-Scale Currents at Core-Mantle Boundary [PDF]
arXiv, 2019 The purpose of this work is to compare kinematics of small-scale current vortices located near the core-mantle boundary with high-speed anomalies of seismic wave velocity in the lowest mantle asso-ciated with the subduction zones. The small-scale vortex paths were early obtained by the authors in the frame of the macro model of the main geomagnetic ...
arxiv
The Chamrousse Ophiolite (Western Alps, France): Relict of a Devono‐Carboniferous Ocean
Terra Nova, EarlyView.ABSTRACT The Chamrousse ophiolite (Western Alps, France) is one of the best‐preserved Variscan relicts of Cambro‐Ordovician oceanisation within the northern Gondwana margin. This study presents new in situ U–Pb isotope analyses on zircon grains from that ophiolite, revealing that the oceanic stage in Chamrousse has occurred 150 Ma later than estimated.
Maureen Gunia +6 more
wiley +1 more source
Terra Nova, EarlyView.ABSTRACT Laser ablation U–Pb single zircon geochronology was applied to four peraluminous granite and granodiorite samples from the Bassiès pluton in the Central Pyrenees (France) yielding a wide range of concordant ages from early Carboniferous (Tournaisian, 351 Ma) to early Permian (Artinskian, 285 Ma).
Stephan Schnapperelle +5 more
wiley +1 more source
Subduction of the Nazca plate beneath Peru: evidence from spatial distribution of earthquakes [PDF]
, 1979 Muawia Barazangi, Bryan L. Isacks
openalex +1 more source
Viscous mantle flow under moving lithospheric plates and under subduction zones [PDF]
, 1977 Geoffrey F. Davies
openalex +1 more source
Geothermics of the Apenninic subduction
Annals of Geophysics, 1997 The subduction of the Adriatic microplate is analysed from a geothermal point of view. In particular four main geodynamic units are distinguished: foreland, foredeep and slab, accretionary prism, and back-arc basin. Each of them is examined from a geothermal point of view and the related open question are discussed.
HARABAGLIA, Paolo, F. MONGELLI, G. ZITO
openaire +5 more sources