Mantle-derived magmas: intraplate, hot-spots and mid-ocean ridges
نویسندگان
چکیده
منابع مشابه
Melt Extraction From The Mantle Beneath Mid-Ocean Ridges
As the oceanic plates move apart at midocean ridges, rocks from Earth’s mantle, far below, rise to fill the void, mostly via slow plastic flow. As the rock approaches the top of its journey, however, partial melting occurs, so that the upper 6 kilometers of oceanic crust are composed of melts, which both erupt on the seafloor as lava and crystallize beneath the surface to form what are known as...
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Hot spots are anomalous areas of surface volcanism that cannot be directly associated with plate tectonic processes. The term hot spot is used rather loosely. It is often applied to any long-lived volcanic center that is not part of the global network of mid-ocean ridges and island arcs. The classic example is Hawaii. Anomalous regions of thick crust on ocean ridges are also considered to be ho...
متن کاملFocused Mantle Upwelling below Mid-ocean Ridges Due to Feedback between Viscosity and Melting
We present the first internally consistent calculation which leads to a narrow 'conduit' of rapid vertical advection and melting of mantle under a spreading center. In this model, mantle flow is driven by plate separation and compositional buoyancy. Melt segregation is described as flow through a permeable media. The major new feature is that the viscosity of the mantle is considered to be a st...
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Citation: Fernández-Méndez M, Olsen LM, Kauko HM, Meyer A, Rösel A, Merkouriadi I, Mundy CJ, Ehn JK, Johansson AM, Wagner PM, Ervik Å, Sorrell BK, Duarte P, Wold A, Hop H and Assmy P (2018) Algal Hot Spots in a Changing Arctic Ocean: Sea-Ice Ridges and the Snow-Ice Interface. Front. Mar. Sci. 5:75. doi: 10.3389/fmars.2018.00075 Algal Hot Spots in a Changing Arctic Ocean: Sea-Ice Ridges and the ...
متن کاملThe Structure of Mid-Ocean Ridges
Mid-ocean ridges provide an important window into the processes of mantle convection and magmatism. The formation, cooling, and eventual subduction of oceanic lithosphere dominate both the large-scale dynamics of the upper mantle and the Earth’s global heat loss. The melt generated during pressure-release melting of the upwelling mantle beneath mid-ocean ridges contributes most of the annual ma...
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ژورنال
عنوان ژورنال: Science Bulletin
سال: 2015
ISSN: 2095-9273
DOI: 10.1007/s11434-015-0920-y