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Experimental Definition of Mantle Melting and Implications for Mantle Dynamics
Mineralogical Magazine, 1994The natural sampling of the Earth's Mantle by xenoliths or by magmas gives evidence for the presence of carbon and hydrogen within the upper mantle and extending into the Transition Zone. Models of accretion and studies of subduetion respectively provide arguments for degassing of primitive C-H species from the upper mantle and for re-cycling of ...
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Fluids and Melts in the Upper Mantle
Acta Geologica Sinica - English Edition, 1999AbstractThis paper presents a direct study of the fluids and melts in the upper mantle by examining the fluid inclusions, melt inclusions and glasses trapped in the mantle lherzolite xenoliths entrained by Cenozoic alkali basalts (basanite, olivine‐nephelinite and alkali‐olivine basalt) from eastern China.
XIA Linqi, XIA Zuchun, XU Xueyi
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Partial Melting and Melt Segregation in a Convecting Mantle
2000Various causes for mantle melting (decompression, heating or release of water) combined with current estimates of upper mantle temperatures and the state of stress in the lithosphere suggest that in many regions the asthenosphere might be partially molten, but melts may not always be able to rise to the surface.
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Melting and Mantle Sources in the Azores
2018The Azores archipelago is geochemically distinct amongst the oceanic intraplate volcanoes in that it has trace element and radiogenic Sr–Nd–Pb–Hf isotope signatures that cover much of the global variation observed in Ocean Island Basalts. Thus, it is the prime example of an intraplate melting anomaly preserving the compositional heterogeneity of the ...
Christoph Beier +2 more
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Earth’s Mantle Melting and Volcanism
2014Convection currents inside the Earth’s asthenosphere will cause instability at shallow depths in the mantle. Rising material and subsequent decompression melting will form hot, upwelling mantle plumes or diapirs. This phenomenon is more common on slow spreading ridges (total rate 5 cm/yrs) spreading ridge segments with their extensive fissural ...
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Mantle Convection and Melt Segregation
2001The Earth began to accrete some 4.5 billion years ago by the accumulation of impacting planetesimals of various sizes. The impacting bodies converted their gravitational and kinetic energies into heat which probably produced initially a large-scale melting condition of the planet. Whether or not the primordial Earth consisted of a gigantic magma ocean,
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