Results 161 to 170 of about 27,251 (208)
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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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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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Nature, 2007
Geophysical hotspots have been attributed to partially molten asthenosphere, fertile blobs, small-scale convection and upwellings driven by core heat. Most are short-lived or too close together to be deeply seated, and do not have anomalous heat flow or temperature; many are related to tectonic features. Bourdon et al.
Anderson, Don L., Natland, James H.
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Geophysical hotspots have been attributed to partially molten asthenosphere, fertile blobs, small-scale convection and upwellings driven by core heat. Most are short-lived or too close together to be deeply seated, and do not have anomalous heat flow or temperature; many are related to tectonic features. Bourdon et al.
Anderson, Don L., Natland, James H.
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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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Mantle plumes and their role in Earth processes
Nature Reviews Earth & Environment, 2021Anthony A P Koppers +2 more
exaly
2015
Seismic images under 62 possible hotspots are reviewed for understanding the origin of hotspots and mantle plumes. Plume-like, continuous low-velocity anomalies are visible beneath Hawaii, Tahiti, Louisville, Iceland, Cape Verde, Reunion, Kerguelen, Amsterdam, Afar, Eifel, Hainan, Yellowstone and Cobb hotspots, suggesting that they may be 13 whole ...
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Seismic images under 62 possible hotspots are reviewed for understanding the origin of hotspots and mantle plumes. Plume-like, continuous low-velocity anomalies are visible beneath Hawaii, Tahiti, Louisville, Iceland, Cape Verde, Reunion, Kerguelen, Amsterdam, Afar, Eifel, Hainan, Yellowstone and Cobb hotspots, suggesting that they may be 13 whole ...
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Earth’s mantle composition revealed by mantle plumes
Nature Reviews Earth & Environment, 2023Dominique A Weis +2 more
exaly