Results 81 to 90 of about 25,858 (276)

PENENTUAN NILAI SATURASI MAGNETIK BATUAN PERIDOTIT ASAL DESA AWANG BANGKAL BARAT KABUPATEN BANJAR KALIMANTAN SELATAN

open access: yesJurnal Fisika Flux, 2013
Abstrak : Peridotite rocks are ultra-alkaline rocks that igneous rocks which high in mineral content of FeO, and also a magnetic mineral. Each rock type has specific properties and characteristics are manifested in the magnetic field in magnetic ...
Sudarningsih Sudarningsih   +2 more
doaj   +3 more sources

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

open access: yesGeochemistry, 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   +4 more
doaj   +1 more source

“Lab‐Quakes”: Quantifying the Complete Energy Budget of High‐Pressure Laboratory Failure

open access: yesAGU Advances, Volume 6, Issue 5, October 2025.
Abstract Understanding the interplay of various energy sinks during seismic fault slip is essential for advancing earthquake physics and improving hazard assessment. However, quantifying the energy consumed by major dissipative processes remains a challenge.
Daniel Ortega‐Arroyo   +7 more
wiley   +1 more source

Compositional Variation of Chrome Spinels in the Ore-bearing Zones of the Kraka Ophiolite and the Chromitite Origin

open access: yesVestnik Permskogo Universiteta: Seriâ Geologiâ, 2017
The article considers a chemical variation of accessory and ore-forming chrome spinels from the Kraka ultramafic massif at the different scales, from the deposit to the thin section.
D. E. Saveliev, I. A. Blinov
doaj   +1 more source

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

open access: yes, 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

open access: yes, 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   +59 more
core   +1 more source

Elastic properties of silicate melts: Implications for low velocity zones at the lithosphere-asthenosphere boundary. [PDF]

open access: yes, 2017
Low seismic velocity regions in the mantle and crust are commonly attributed to the presence of silicate melts. Determining melt volume and geometric distribution is fundamental to understanding planetary dynamics.
Clark, Alisha N, Lesher, Charles E
core   +2 more sources

Geodynamic Information in Peridotite Petrology [PDF]

open access: yesJournal of Petrology, 2004
Systematic differences are observed in the petrology and major element geochemistry of natural peridotite samples from the sea floor near oceanic ridges and subduction zones, the mantle section of ophiolites, massif peridotites, and xenoliths of cratonic mantle in kimberlite.
openaire   +2 more sources

Phase Relations in the MgSiO3 System Associated With Hot Mantle Upwelling Across the 660 km Depth

open access: yesGeophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract The phase transformations of MgSiO3 bridgmanite control the structure, dynamics and chemistry of the Earth's mantle. Formation of bridgmanite occurs at a depth of about 660 km causing the strong and abrupt seismic discontinuity. Previous experimental studies have revealed that this discontinuity is caused by ringwoodite dissociation in the ...
Artem Chanyshev   +12 more
wiley   +1 more source

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