Results 21 to 30 of about 338,697 (184)

Does depleted mantle form an intrinsic part of the Iceland plume? [PDF]

, 2003
Icelandic basalt ranges in composition from voluminous tholeiite, erupted in the rift zones, to small-volume, mildly alkaline basalt erupted off-axis.
Fitton, J. G., Hardarson, B. S., Kempton, P. D., Saunders, A. D.   +3 more
core   +1 more source

A joint geochemical–geophysical record of time-dependent mantle convection south of Iceland [PDF]

, 2014
The North Atlantic V-Shaped Ridges (VSRs) provide a spatially extensive and clear record of unsteady mantle convective circulation over >40 My>40 My.
Jones, S.M.; id_orcid, White, Nicholas J., Murton, Bramley, Maclennan, John, Jones, Steve, Walters, Rachel J., Walters, R.L., White, Nicky, Maclennan, J., Murton, Bramley J., Fitton, J.G., Fitton, J. G., Jones, S.M., Fitton, J. Godfrey, White, N.J., Murton, B.J., Jones, Stephen M.   +16 more
core   +1 more source

Quartz-bearing rhyolitic melts in the Earth’s mantle

Nature Communications, 2022
AbstractThe occurrence of rhyolite melts in the mantle has been predicted by high pressure-high temperature experiments but never observed in nature. Here we report natural quartz-bearing rhyolitic melt inclusions and interstitial glass within peridotite xenoliths.
Dallai L.[1, 2, 3], Bianchini G.[4], Avanzinelli R.[5], Deloule E.[6], Natali C.[5, 7], Gaeta M.[1], Cavallo A.[8], Conticelli S.[5, 7]   +11 more
openaire   +4 more sources

Mineral physics of the mantle [PDF]

, 1995
The last few years have seen intense interest in the global environment and climate change, and with it an increasing appreciation for the interactions between the atmosphere, biosphere, oceans and the solid earth.
Lars Stixrude, Stixrude, L
core   +1 more source

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, Hamid Ahmadipour, Abbas Moradian, Azam Zahedi, Kazuo Nakashima   +4 more
doaj   +1 more source

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

Temperatures in ambient mantle and plumes: Constraints from basalts, picrites, and komatiites [PDF]

, 2006
Several methods have been developed to assess the thermal state of the mantle below oceanic ridges, islands, and plateaus, on the basis of the petrology and geochemistry of erupted lavas. One leads to the conclusion that mantle potential temperature (i.e.
Lesher, C. M., P. D. Asimow (4380079), Niu, Yaoling, A. D. Saunders (7585886), Lesher, C.M., Arndt, N., Herzberg, C., C. Herzberg (10061344), Fitton, J.G., Fitton, J. G., Asimow, Paul D., Y. L. Niu (10061347), C. M. Lesher (7733825), Asimow, P.D., J. G. Fitton (7585871), Saunders, A.D., Saunders, A. D., Arndt, Nicholas, N. Arndt (8870258), Michael Cheadle (10060309), Cheadle, M. J., Cheadle, M.J., Niu, Y. L., Niu, Y., Asimow, P. D., Cheadle, Michael   +25 more
core   +1 more source

Impact-induced changes in source depth and volume of magmatism on Mercury and their observational signatures

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, Nicola Tosi, Ana-Catalina Plesa, Thomas Ruedas   +3 more
doaj   +1 more source

Multiscale modeling of upper mantle plasticity: From single-crystal rheology to multiphase aggregate deformation [PDF]

, 2014
We report a first application of an improved second-order (SO) viscoplastic self-consistent model for multiphase aggregates, applied to an olivine + diopside aggregate as analogue for a dry upper mantle peridotite deformed at 10 15 s 1 shear strain rate ...
CORDIER, Patrick, CASTELNAU, Olivier, RATERON, Paul, MERKEL, Sébastien, RATERRON, Paul, BOLLINGER, Caroline, DETREZ, Fabrice   +6 more
core   +1 more source

Petrological and geochemical characteristics of flood and shield basalts from Kesem-Megezez section, northwestern Ethiopian Plateau: Implication for their mantle source variations

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, Takele Chekol, Daniel Meshesha   +2 more
doaj   +1 more source