Results 71 to 80 of about 25,858 (276)

Mechanisms and Geochemical Models of Core Formation

, 2015
The formation of the Earth's core is a consequence of planetary accretion and processes in the Earth's interior. The mechanical process of planetary differentiation is likely to occur in large, if not global, magma oceans created by the collisions of ...
Abe, Agnor, Alexander, Asahara, Bagdassarov, Ballhaus, Cameron, Canup, Cerantola, Chambers, Corgne, Dahl, Deguen, Fischer, Frost, Halliday, Hartmann, Hevey, Holzapfel, Holzheid, Holzheid, Hustoft, Jacobson, Kendall, König, Landeau, Li, Li, Liebske, Mann, Mann, McDonough, Minarik, Morbidelli, Nimmo, Nimmo, O'Brien, O'Neill, Olson, Palme, Reese, Ricard, Righter, Rubie, Rubie, Rubie, Rubie, Rubie, Rubie, Rudge, Samuel, Shannon, Shannon, Shi, Siebert, Solomatov, Stevenson, Takafuji, Terasaki, Terasaki, Terasaki, Terasaki, Tonks, Tuff, Urey, von Bargen, Wade, Walsh, Walte, Walte, Wood, Wood, Wänke, Yoshino, Ćuk   +74 more
core   +1 more source

Carbonate alteration of ophiolitic rocks in the Arabian–Nubian Shield of Egypt: sources and compositions of the carbonating fluid and implications for the formation of Au deposits [PDF]

, 2016
Ultramafic portions of ophiolitic fragments in the Arabian–Nubian Shield (ANS) show pervasive carbonate alteration forming various degrees of carbonated serpentinites and listvenitic rocks.
Azer, Mokhles K., Boskabadi, Arman, Boyce, Adrian, Broman, Curt, Cooper, Matthew J., Majka, Jaroslaw, Mohamed, Fathy H., Pitcairn, Iain K., Stern, Robert J., Teagle, Damon A.H.   +9 more
core   +2 more sources

Deformation and exhumation of the Ronda peridotite (Spain) [PDF]

Tectonics, 2013
The Ronda peridotite supplies one of the best objects to document subcontinental mantle deformation, but its internal deformation and exhumation mechanisms remain controversial. Here we provide new structural data and numerical results that constrain the Oligocene‐Miocene deformation history of the Ronda massif. We first describe a mantle shear zone in
Précigout, Jacques, Gueydan, Frédéric, Garrido, Carlos, Cogné, Nathan, Booth-Rea, Guillermo   +4 more
openaire   +5 more sources

Reactive Transport Modeling in Porous Fractured Media: Application to Weathering Processes

Water Resources Research
Complex permeability distribution is frequently encountered in weathered rocks with inherited heterogeneities, such as networks of discontinuities that impact fluid flow and water‐rock interactions.
Sylvain Favier, Yoram Teitler, Fabrice Golfier, Michel Cathelineau   +3 more
doaj   +1 more source

Estimasi Ukuran Bulir Mineral Magnetik pada Batuan Peridotit Berdasarkan Peluruhan Anhysteretic Remanent Magnetization (ARM)

Jurnal Fisika Flux, 2009
A decaying measurement of Anhysteretic Remanent Magnetization (ARM) has been undertaken to estimation the grain size of magnetic mineral which carries remanent on peridotite igneous rocks.
Rina Reida, Sudarningsih Sudarningsih, Totok Wianto   +2 more
doaj   +1 more source

Vertical depletion of ophiolitic mantle reflects melt focusing and interaction in sub-spreading-center asthenosphere

Nature Communications, 2022
Upward depletion of ophiolitic mantle is produced by melt-peridotite reaction with lateral melt/rock ratio variations in an asthenospheric upwelling column, which flows to become the horizontal oceanic lithospheric mantle under spreading centers.
Qing Xiong, Hong-Kun Dai, Jian-Ping Zheng, William L. Griffin, Hong-Da Zheng, Li Wang, Suzanne Y. O’ Reilly   +6 more
doaj   +1 more source

Seismic constraints on the three-dimensional geometry of low-angle intracrustal reflectors in the Southern Iberia Abyssal Plain

, 2008
Several lines of evidence suggest that simple shear rifting of the continental crust, in the formof low-angle detachment faulting, occurred during the final stages of continental breakupbetween West Iberia and the Grand Banks.
Dean, S.M., Minshull, T.A., Whitmarsh, R.B.   +2 more
core   +1 more source

Mapping ultramafic complexes using airborne imaging spectroscopy and spaceborne data in Arctic regions with abundant lichen cover, a case study from the Niaqornarssuit complex in South West Greenland

European Journal of Remote Sensing, 2020
This study investigates the usage of HyMAP airborne hyperspectral and Sentinel-2, ASTER and Landsat-8 OLI spaceborne multispectral data for detailed mapping of mineral resources in the Arctic. The EnMAP Geological Mapper (EnGeoMAP) and Iterative Spectral
Sara Salehi, Christian Mielke, Christian Rogass   +2 more
doaj   +1 more source

Global variations in abyssal peridotite compositions

Lithos, 2016
AbstractAbyssal peridotites are ultramafic rocks collected from mid-ocean ridges that are the residues of adiabatic decompression melting. Their compositions provide information on the degree of melting and melt–rock interaction involved in the formation of oceanic lithosphere, as well as providing constraints on pre-existing mantle heterogeneities ...
openaire   +4 more sources

Lithological structure of the Galápagos Plume

Geochemistry, Geophysics, Geosystems, 2013
We have measured Ni, Ca, and Mn in olivine phenocrysts from volcanoes in the Galápagos Archipelago to infer the mantle source lithologies. Results show that peridotite is the dominant source lithology for Fernandina, Floreana, Genovesa, Wolf Island, and ...
Christopher Vidito, Claude Herzberg, Esteban Gazel, Dennis Geist, Karen Harpp   +4 more
doaj   +1 more source