Results 191 to 200 of about 3,317 (237)
Influences on the positioning of mantle plumes following supercontinent formation
Journal of Geophysical Research: Solid Earth, 2015 Several mantle convection studies analyzing the effects of supercontinent formation and dispersal show that the genesis of subcontinental plumes results from the formation of subduction zones at the edges of the supercontinent rather than from the effect
Philip J Heron, Julian P Lowman
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On predicting mantle mushroom plumes
Geoscience Frontiers, 2011 This study investigates the mechanism of formation of convection plumes of mushroom shape in sub-solidus mantle and their prediction. The seismic-tomographic images of columnar structures of several hundreds kilometers in diameter have been reported by ...
Rex B Thorpe, Zhidan Zhao
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2005
Verlag. McElhinny MW (1973) Paleomagnetization and Plate Tectonics. Cambridge: Cambridge University Press. McElhinny MWand McFadden PL (2000) Paleomagnetization: Continents and Oceans. San Diego: Academic Press. Opdyke ND and Channell JET (1996) Magnetic Stratigraphy. San Diego: Academic Press. Tarling DH (1983) Paleomagnetization.
Suetsugu, D. +2 more
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Verlag. McElhinny MW (1973) Paleomagnetization and Plate Tectonics. Cambridge: Cambridge University Press. McElhinny MWand McFadden PL (2000) Paleomagnetization: Continents and Oceans. San Diego: Academic Press. Opdyke ND and Channell JET (1996) Magnetic Stratigraphy. San Diego: Academic Press. Tarling DH (1983) Paleomagnetization.
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Mantle Plumes and Continental Tectonics
Science, 1992Mantle plumes and plate tectonics, the result of two distinct modes of convection within the Earth, operate largely independently. Although plumes are secondary in terms of heat transport, they have probably played an important role in continental geology.
R I, Hill +3 more
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Mantle Amphiboles and Mantle Plumes
Mineralogical Magazine, 1998Metasomatic minerals such as clinopyroxene, amphibole, phlogopite or apatite found in many mantle xenoliths provide evidence for fluid migration through mantle rocks and reaction with mantle minerals. The chemical composition of these minerals give us insight into the nature and composition of the percolating fluids, the processes of fluid-melt ...
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Physics Today, 2011
Seismic images of Earth’s interior offer evidence that hot columns of buoyant rock from deep in the mantle are the source of the volcanism at Yellowstone and similar hot spots. Yet mysteries remain.
Eugene Humphreys, Brandon Schmandt
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Seismic images of Earth’s interior offer evidence that hot columns of buoyant rock from deep in the mantle are the source of the volcanism at Yellowstone and similar hot spots. Yet mysteries remain.
Eugene Humphreys, Brandon Schmandt
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Earth and Planetary Science Letters, 2003
Abstract Mantle plumes are hypothetical hot, narrow mantle upwellings that are often invoked to explain hotspot volcanism with unusual geophysical and geochemical characteristics. The mantle plume is a well-established geological structure in computer modeling and laboratory experiments but an undisputed seismic detection of one has yet to be made ...
Jeroen Ritsema, Richard M. Allen
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Abstract Mantle plumes are hypothetical hot, narrow mantle upwellings that are often invoked to explain hotspot volcanism with unusual geophysical and geochemical characteristics. The mantle plume is a well-established geological structure in computer modeling and laboratory experiments but an undisputed seismic detection of one has yet to be made ...
Jeroen Ritsema, Richard M. Allen
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Nature, 1973
O'HARA1 has objected to my interpretation concerning the trace element chemistry of lavas erupted along the Iceland-Reykjanes Ridge System2 on the ground that: (1) Such magmas are not “primary magmas” but residual liquids; (2) instead, such lavas have suffered prior to eruption extensive “gabbro fractionation” at low pressure (olivine-augite ...
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O'HARA1 has objected to my interpretation concerning the trace element chemistry of lavas erupted along the Iceland-Reykjanes Ridge System2 on the ground that: (1) Such magmas are not “primary magmas” but residual liquids; (2) instead, such lavas have suffered prior to eruption extensive “gabbro fractionation” at low pressure (olivine-augite ...
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Nature Geoscience, 2011
The ocean floor is littered with hundreds of thousands of mostly extinct volcanoes. The origin of at least some of these seamounts seems to rest with mantle plumes.
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The ocean floor is littered with hundreds of thousands of mostly extinct volcanoes. The origin of at least some of these seamounts seems to rest with mantle plumes.
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PALEOGEOTHERMS AND MANTLE PLUMES
International Geology Review, 1986Translated from "Paleogeotermy i mantiynyye strui," Izvestiya AN SSSR, seriya geologicheskaya, 1986, No. 7, pp. 16-25. The author is with the Institute of the Lithosphere, USSR Academy of Sciences, Moscow. On the basis of his recalibration of xenolith thermobarometers, he distinguishes convective geothermal gra dients associated with mantle plumes ...
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