Results 101 to 110 of about 59,876 (275)

Mantle-Crust Isotopic Relationships along Mid Ocean Ridges: Constraints from the Analysis of Time Series [PDF]

, 2017
Isotopic relationships between parent mantle and daughter MORBs have been used to reveal the composite nature of the source tracking the missing components in their isotopic fingerprints.
BRUNELLI, Daniele, CIPRIANI, Anna
core  

On the relative importance of thermal and chemical buoyancy in regular and impact-induced melting in a Mars-like planet [PDF]

, 2017
We ran several series of two-dimensional numerical mantle convection simulations representing in idealized form the thermochemical evolution of a Mars-like planet.
, , Abramov, Abramowitz, Agee, Ashcroft, Aubaud, Balog, Balog, Barnett, Belleguic, Berryman, Bertka, Bertka, Bjorkman, Blundy, Blundy, Bolfan-Casanova, Borg, Borg, Borg, Breuer, Brey, Brooker, Chamorro, Chen, Collinet, Corgne, Croft, Debye, Duffy, Dygert, Fernández, Fornberg, Frey, Frey, Gault, Gault, Golabek, Grott, Grüneisen, Grüneisen, Harlow, Hauck, Hauri, Hauri, Head, Hernlund, Hirschmann, Hirschmann, Hirth, Hofmeister, Hofmeister, Ita, Ivanov, Jin, Jing, Jing, Jing, Johnson, Jones, Kaiura, Katz, Keller, Khan, Kiefer, Kiefer, Koga, Konopliv, Landwehr, Leone, Li, Mackwell, Mamedov, Matsukage, Maxwell, McCubbin, McCubbin, McCubbin, McGovern, Mibe, Monteux, Morschhauser, Nimmo, Nishida, Novella, O'Keefe, O'Keefe, O'Leary, Ogawa, Ogawa, Ohtani, Phillips, Pierazzo, Plesa, Plesa, Poirier, Potter, Reese, Reese, Reese, Richardson, Ritzer, Rivoldini, Robbins, Roberts, Roberts, Rolf, Ruedas, Ruedas, Ruedas, Råheim, Sanloup, Sarafian, Schmerr, Schott, Schultz, Shannon, Shaw, Spudis, Stacey, Stacey, Stixrude, Tackley, Tackley, Tauber, Taura, Taylor, Tenner, Tenner, Toplis, Wang, Watters, Werner, Werner, Wieczorek, Wieczorek, Williams, Wood, Wood, Wood, Wänke, Zhao, Zuber   +143 more
core   +2 more sources

Cryogenian Glacial Erosion and Tectonics as Agents of Crustal Recycling

Terra Nova, EarlyView.
ABSTRACT Zircon preserves evidence of recycling processes that link surface environments to the mantle. Combined δ18O‐εHf in zircon fingerprints magmatic sources and tracks how crustal material is reworked over time. We apply statistical analyses to a global compilation that apparently resolves shifts in zircon U–Pb, δ18O, and Lu‐Hf data spanning the ...
M. Seraine, C. J. Spencer, T. M. Gernon, T. Hincks, C. L. Kirkland, E. Rugen, L. DaSilva, H. Shafaii Moghadam, L. P. Soares, G. Fazio   +9 more
wiley   +1 more source

Giant Porphyry Copper Deposits Caused by a Slab Jamming in the Mantle Transition Zone

Terra Nova, EarlyView.
ABSTRACT Two giant porphyry copper deposits in the Southern Central Andes formed during the Miocene–Pliocene transition when a bend in the subducting Juan de Fernández hotspot chain jammed in the mantle transition zone, causing mega‐scale slab‐kinking. This geometry implies mechanical resistance that caused East–West compression and eventually a thrust‐
Nipaporn Nakrong, Marnie Forster, Wim Spakman, Hielke Jelsma, Francois Gaboury, Gordon Lister   +5 more
wiley   +1 more source

Komatiite genesis in the Archaean mantle, with implications for the tectonics of Archaean greenstone belts [PDF]

The presence of ultramafic lavas (komatiites) associated with Archean greenstone belts has been suggested to indicate very high increments (50-80%) of partial melting of the Archean mantle.
Elthon, D.
core   +1 more source

A Rare Glimpse of Paleoproterozoic Sub‐Arc Mantle: The Ussuit Peridotite, West Greenland

Geochemistry, Geophysics, Geosystems
Mantle residues beneath Archean cratonic nuclei have been extensively studied, whereas less attention has been given to the mantle lithosphere beneath Proterozoic mobile belts that link these nuclei.
T. McIntyre, P. Waterton, L. Li, B. Gong, X. Zha, K. Szilas, D. G. Pearson   +6 more
doaj   +1 more source

Ultrafast mantle impregnation by carbonatite melts

Geology, 2000
Carbonatitic melts are often invoked as responsible for metasomatism in the mantle because of their unique chemical and physical properties. Here we report on infiltration experiments demonstrating that such melts can percolate very quickly in polycrystalline olivine.
Hammouda, Tahar, Laporte, Didier
openaire   +4 more sources

A REE Inverse Model From Bulk Distribution Coefficients and Boundary Conditions: Results for Shield and Rejuvenated Stage Hawaiian Volcanoes

Geochemistry, Geophysics, Geosystems
A major challenge in mantle geochemistry is determining the source composition and melt fraction involved in melting. We provide a new Rare‐Earth Element (REE) inverse model that provides source concentration, source and melt mineral modes, and melt ...
M. J. Carr, M. D. Feigenson, E. Gazel
doaj   +1 more source

Lithosphere Modification Beneath the North China Craton: Geochemical Constraints of Water Contents from the Damaping Peridotite Xenoliths

Crystals
The water contents and geochemical evidence of nominally anhydrous minerals in peridotite xenoliths provide critical insights into lithospheric mantle features, offering a deep understanding of cratonic destruction and mantle evolution processes ...
Baoyi Yang, Bo Xu, Yi Zhao, Hui Zhang
doaj   +1 more source

Low-degree mantle melting controls the deep seismicity and explosive volcanism of the Gakkel Ridge. [PDF]

Nat Commun, 2022
Koulakov I, Schlindwein V, Liu M, Gerya T, Jakovlev A, Ivanov A.   +5 more
europepmc   +1 more source