Results 21 to 30 of about 552,470 (226)
Investigation of Petrological Characteristics of The Upper Mantle in Hadji-Abad Ophiolitic Complex (South of Iran): Based on Mineral Chemistry [PDF]
Journal of Sciences, Islamic Republic of Iran, 2021 The mantle peridotites of the Hadji-Abad ultramafic complex in Hormozgan province, show some petrological evolutions of the upper mantle of southern Iran. The complex includes harzburgite, lherzolite, dunite and chromitite.
Mojtaba SoltaniNezhad +4 more
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Nature Communications, 2017 Mantle partial melting produced the volcanic crust of Mercury. Here, the authors numerically model the formation of post-impact melt sheets and find that mantle convection was weak at around 3.7–3.8 Ga and that the melt sheets of Caloris and Rembrandt ...
Sebastiano Padovan +3 more
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Heliyon, 2023 The Kesem-Megezez Section is located on the western escarpment of the main Ethiopian rift, central Ethiopia, part of the northwestern Ethiopia plateau, and hosts both flood basalts (Kesem Oligocene basalts) and shield volcano basalts (Megezez Miocene ...
Birhane Girum +2 more
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Thermal effects of pyroxenites on mantle melting below mid-ocean ridges
Nature Geoscience, 2018 After travelling in Earth’s interior for up to billions of years, recycled material once injected at subduction zones can reach a subridge melting region as pyroxenite dispersed in the host peridotitic mantle.
D. Brunelli, A. Cipriani, E. Bonatti
semanticscholar +1 more source
A subduction and mantle plume origin for Samoan volcanism
Scientific Reports, 2018 The origin of Samoan volcanism in the southwest Pacific remains enigmatic. Whether mantle melting is solely caused by a mantle plume is questionable because some volcanism, here referred to as non-hotspot volcanism, defies the plume model and its linear ...
Vincent Strak, Wouter P. Schellart
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Frontiers in Earth Science, 2021 Platinum-group elements (PGE) and gold are a promising tool to assess the processes of mantle melting beneath the subduction zones. However, fractionation processes in magmas inevitably overwrite the initial metal budgets of magmas, making constraints on
Anton Kutyrev +8 more
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Metallic melt for the mantle [PDF]
Science, 2016 Geophysics Ultralow velocity zones (ULVZs) are distinct and dense patches at the very base of Earth's rocky mantle. Liu et al. suggest that iron carbide may be a vital component of ULVZs on the basis of measurements of iron carbide melting temperatures.
openaire +1 more source
melting of the Siberian Mantle Plume [PDF]
Geophysical Research Letters, 1998 The Putorana basalts, comprising ∼90% of the Siberian Traps (ST), have had their chemistry modified from primary tholeiitic picritic magmas by ∼12% crystallization of olivine. Major‐trace element ratios, and Nd isotopes of these lavas are consistent with their origin from a relatively undepleted plume by 12–16% rapid decompressional melting at ∼50–80 ...
Asish R. Basu +2 more
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Partial melting in the deepest mantle [PDF]
Geophysical Research Letters, 2002 We have compared the travel times of direct (P, S) and core‐reflected (PcP, ScS) phases recorded in southern Africa from earthquakes occurring in the Scotia Arc region. The low‐velocity region beneath the south Atlantic is explored by calculating ScS‐S and PcP‐P travel‐time residuals to determine the correlation and magnitude of Vs and Vp reductions in
N. A. Simmons, S. P. Grand
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Geochemistry, Geophysics, Geosystems, 2014 The Samoan islands of Ta'u and Ofu/Olosega (Ofol hereafter) are single shield volcanoes that have erupted alkali basalt for the past 70 and 440 kyr, respectively.
Stanley R. Hart, Matthew G. Jackson
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