Results 31 to 40 of about 3,317 (237)
Does depleted mantle form an intrinsic part of the Iceland plume? [PDF]
, 2003 Icelandic basalt ranges in composition from voluminous tholeiite, erupted in the rift zones, to small-volume, mildly alkaline basalt erupted off-axis.
Fitton, J. G. +3 more
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A joint geochemical–geophysical record of time-dependent mantle convection south of Iceland [PDF]
, 2014 The North Atlantic V-Shaped Ridges (VSRs) provide a spatially extensive and clear record of unsteady mantle convective circulation over >40 My>40 My.
Jones, S.M.; id_orcid +16 more
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Scientific Reports, 2021 Rare oceanic diamonds are believed to have a mantle transition zone origin like super-deep continental diamonds. However, oceanic diamonds have a homogeneous and organic-like light carbon isotope signature (δ13C − 28 to − 20‰) instead of the extremely ...
Luc S. Doucet +2 more
doaj +1 more source
Geosciences, 2017 In this study, we conduct numerical simulations of thermochemical mantle convection in a 2D spherical annulus with a highly viscous lid drifting along the top surface, in order to investigate the interrelation between the motion of the surface (super ...
Masanori Kameyama, Akari Harada
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Deep mantle plumes and an increasing Earth radius
Geodesy and Geodynamics, 2019 Recent space geodetic and gravimetric studies have given indications that the Earth's radius is increasing at 0.1–0.4 mm yr−1 at present. Seismic studies have also shown that earthquakes alone could be causing the radius to increase at 0.011–0.06 mm yr−1.
Matthew R. Edwards
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Long‐Distance Asthenospheric Transport of Plume‐Influenced Mantle From Afar to Anatolia
Geochemistry, Geophysics, Geosystems, 2023 The origin of widespread volcanism far from plate boundaries and mantle plumes remains a fundamental unsolved question. An example of this puzzle is the Anatolian region, where abundant intraplate volcanism has occurred since 10 Ma, but a nearby ...
J. Hua +4 more
doaj +1 more source
, 2021 The file is CCP stacking results of receiver function in northeast China. NE1.tar.gz and NE2.tar.gz are raw data used in this study.
openaire +2 more sources
Are Mantle Plumes Periodic? [PDF]
Eos, Transactions American Geophysical Union, 2013 In the past few years, researchers have uncovered evidence that several kinds of geological and biological events seem to show regular cycles of similar lengths. For example, Rohde and Muller [2005] looked at the record of diversity of marine organisms over the past 540 million years and found evidence for two cycles in the data—a roughly 62‐million ...
Michael R. Rampino, Andreas Prokoph
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Earth’s mantle composition revealed by mantle plumes
, 2023 International audienceEarth's mantle is integral to many processes that shape our planet, including convection, crustal formation, crustal recycling, and global heat and volatile budgets.
Rita Parai +21 more
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Komatiites From Mantle Transition Zone Plumes
Frontiers in Earth Science, 2020 During the Archean, episodic volcanism commonly included both plume- and arc-type magmatism, raising the issue of a possible link between “bottom up” and “top down” geodynamic processes.
Derek Wyman
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