Results 71 to 80 of about 41,907 (309)

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

Density of Sodium Aluminosilicate Melts Along the NaAlSiO4‐NaAlSi3O8 Join at High Pressure: In‐Situ Measurements and Re‐Calibration of a Modified Hard‐Sphere Equation of State For Silicate Melts

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract Silicate melts play a crucial role in planetary differentiation. The density contrast between silicate melts and the surrounding solid residue exerts a primary control on many magmatic processes. However, direct measurements of the density of silicate melts at high pressure (P) and temperature (T) conditions remain challenging, particularly ...
Man Xu, Zhicheng Jing, James A. Van Orman, Qingyang Hu, Qi Chen, Tony Yu, Yanbin Wang   +6 more
wiley   +1 more source

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

Heat and Tectonics of the Canadian Cordillera From the Seismically Constrained Inversion of Gravity Data

Tectonics, Volume 45, Issue 2, February 2026.
Abstract An updated approach to seismically constrained modeling of gravity data reveals two broad, NW‐trending low‐density zones in the mantle lithosphere beneath the Canadian Cordillera. The low‐density zones coincide with a shallow lithosphere‐asthenosphere boundary (LAB), a shallow Curie‐point depth, and the location of Quaternary volcanoes.
Nathan Hayward, Tark S. Hamilton
wiley   +1 more source

A Seismically Active Shear Zone in the Uppermost Mantle Beneath the Canadian Rockies

Geophysical Research Letters, Volume 53, Issue 1, 16 January 2026.
Abstract Continental mantle earthquakes are uncommon but hold important clues for understanding lithospheric rheology. Few of these earthquakes (<10) have been documented in western North America, though it is likely more exist owing to difficulties in resolving focal depth for small earthquakes.
Sean J. Hutchings, Keith D. Koper, Guanning Pang   +2 more
wiley   +1 more source

A Model for Melt‐Preferred Orientation and Permeabilities in Deformed Partially Molten Peridotites

Geochemistry, Geophysics, Geosystems
In a deforming partially molten rock, melt concentrates into a grain‐scale melt pocket aligned at a preferred orientation (melt‐preferred orientation, or MPO).
Boda Liu, Chao Qi, Ross N. Mitchell, Cin‐Ty A. Lee, Chuan‐Zhou Liu   +4 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

Oxygen Isotope Variations of Basaltic Lavas and Upper Mantle Rocks [PDF]

, 2001
This chapter summarizes the oxygen isotope geochemistry of terrestrial basalts and their mantle sources, including the conceptual framework for interpreting such data and the phenomenology of known variations.
Eiler, John M.
core  

Thermoelastic Properties of Ringwoodite [Fe_x,Mg_(1-x)]_2SiO_4: Its Relationship to the 520 km Seismic Discontinuity

, 2012
We combine density functional theory (DFT) within the local density approximation (LDA), the quasiharmonic approximation (QHA), and a model vibrational density of states (VDoS) to calculate elastic moduli and sound velocities of gamma-[Fe_x,Mg_(1-x ...
Abramson, Akaogi, Bagley, Baroni, Carrier, Ceperley, Chambers, Da Silveira, Deuss, Giannozzi, Higo, Hohenberg, Hsu, Isaak, Isaak, Isaak, Isaak, Jackson, Jaques, Justin Revenaugh, Katsura, Kohn, Lawrence, Li, Li, Li, Li, Li, Liu, Maribel Núñez Valdez, Mayama, Mayama, Núñez Valdez, Núñez Valdez, Putnis, Renata M. Wentzcovitch, Revenaugh, Rigden, Rinwood, Saikia, Shearer, Shearer, Sinogeikin, Sinogeikin, Sinogeikin, Stackhouse, Umemoto, Vanderbilt, Wallace, Watt, Watt, Weidner, Wentzcovitch, Wentzcovitch, Wu, Xu, Yonggang G. Yu, Yu, Zha, Zhongqing Wu   +59 more
core   +1 more source

Mantle melting as a function of water content beneath back-arc basins [PDF]

, 2006
Subduction zone magmas are characterized by high concentrations of H_(2)O, presumably derived from the subducted plate and ultimately responsible for melting at this tectonic setting.
Grove, Timothy L., Hauri, Erik, Kelley, Katherine A., Newman, Sally, Plank, Terry, Stolper, Edward M.   +5 more
core   +1 more source