Results 21 to 30 of about 62,454 (271)

Geophysical characterisation of the ocean–continent transition at magma-poor rifted margins [PDF]

, 2009
Geophysical characterisation of the ocean-continent transition (OCT) at magma-poor riftedmargins has focused primarily on the determination of P wave velocities using wide-angleseismic techniques. Such experiments have shown that the OCT is heterogeneous,
Minshull, Timothy A.
core   +1 more source

Biomineralization of primary carbonate cements: a new biosignature in the fossil record from the Anisian of Southern Italy

Lethaia, EarlyView., 2021
Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido, Matteo Sposato, Giuseppe Palladino, Alessandro Vescogni, Domenico Miriello   +4 more
wiley   +1 more source

MODELING OF MOVING DEFORMABLE CONTINENTS BY ACTIVE TRACERS: CLOSING AND OPENING OF OCEANS, RECIRCULATION OF OCEANIC CRUST

Геодинамика и тектонофизика, 2018
The evolution of the ‘mantle – moving deformable continents’ system has been studied by numerical experiments. The continents move self-consistently with the mantle flows of thermo-compositional convection.
A. M. Bobrov, A. A. Baranov
doaj   +1 more source

Formation of an Al‐Rich Niccolite‐Type Silica in Subducted Oceanic Crust: Implications for Water Transport to the Deep Lower Mantle

Geophysical Research Letters, 2022
Subducted oceanic crust is enriched in free silica. Although being one of the silica polymorphs at lower‐mantle pressures, niccolite‐type phase (Nt‐phase) has not been documented in multicomponent metabasaltic or metasediment compositions relevant to ...
Lu Liu, Hongsheng Yuan, Yao Yao, Ziqiang Yang, Federico Aiace Gorelli, Nico Giordano, Lixin He, Eiji Ohtani, Li Zhang   +8 more
doaj   +1 more source

Continental Growth and Recycling in Convergent Orogens with Large Turbidite Fans on Oceanic Crust

Geosciences, 2013
Convergent plate margins where large turbidite fans with slivers of oceanic basement are accreted to continents represent important sites of continental crustal growth and recycling.
Ben D. Goscombe, David A. Foster
doaj   +1 more source

Deep lithospheric structures along the southern central Chile Margin from wide-angle P-wave modellilng [PDF]

, 2009
Crustal- and upper-mantle structures of the subduction zone in south central Chile, between 42 degrees S and 46 degrees S, are determined from seismic wide-angle reflection and refraction data, using the seismic ray tracing method to calculate minimum ...
A. Krabbenhoeft, Angermann, Bangs, Barrientos, Behrmann, Behrmann, Bialas, Bourgois, Brasse, Bry, C. J. Petersen, C. Papenberg, Cande, Cifuentes, Cisternas, Contreras-Reyes, Contreras-Reyes, Contreras-Reyes, Currie, DeMets, E. Contreras-Reyes, E. R. Flueh, Farr, Fischer, Flueh, Flueh, Gonzalez, Grevemeyer, Grevemeyer, Grevemeyer, Gross, Haberland, Hackney, Heesemann, Hyndman, I. Grevemeyer, Ivandic, Kapinos, Kirby, Krawczyk, Lange, Lefeldt, M. Scherwath, Melnick, Melnick, Mordohovich, Oleskevich, R. W. Weinrebe, Ranero, Ranero, Ranero, Ranero, Rietbrock, Roeser, Scherwath, Scholl, Song, Stein, Takahashi, Tassara, Taylor, Tebbens, Thierer, Tilmann, Voelker, Voelker, von Huene, Wessel, White, Yanez, Zelt, Zelt, Zelt, Zelt   +73 more
core   +1 more source

Sulfur loss from subducted altered oceanic crust and implications for mantle oxidation [PDF]

, 2020
© The Author(s), [year]. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Walters, J. B., Cruz-Uribe, A. M., & Marschall, H. R.
Cruz‐Uribe, Alicia M., Marschall, Horst R., Walters, Jesse B.   +2 more
core   +1 more source

A New Model for the Evolution of Oceanic Transform Faults Based on 3D Broadband Seismic Observations From São Tomé and Príncipe in the Eastern Gulf of Guinea

Geochemistry, Geophysics, Geosystems, 2022
Oceanic Transform Faults are one of manifestations of the three major plate boundaries and a key tectonic feature of oceanic crust. They are broadly considered to accommodate strike‐slip displacement along simple vertical faults and to be largely without
Myron F. H. Thomas, Christian Heine, Jimmy vanItterbeeck, Ilya Ostanin, Andrey Seregin, Michael Spaak, Tamara Morales, Tess Oude Essink   +7 more
doaj   +1 more source

Studying the Earth with Geoneutrinos [PDF]

, 2013
Geo-neutrinos, electron antineutrinos from natural radioactive decays inside the Earth, bring to the surface unique information about our planet. The new techniques in neutrino detection opened a door into a completely new inter-disciplinary field of ...
Ludhova, Livia, Zavatarelli, Sandra
core   +2 more sources

Burying Earth's Primitive Mantle in the Slab Graveyard

Geochemistry, Geophysics, Geosystems, 2021
The evolution of mantle composition can be viewed as a process of destruction whereby the initial chemical state is overprinted and reworked with time.
T. D. Jones, N. Sime, P. E. van Keken
doaj   +1 more source