Results 41 to 50 of about 7,121 (239)

Determination of Rare Earth Elements in Peridotite by Inductively Coupled Plasma-Mass Spectrometry after Alkali Fusion and Mg(OH)2 and Fe(OH)3 Coprecipitation

Yankuang ceshi, 2017
Characteristics of REEs in peridotite is significant for studying petrogenesis and magmatic processes. Due to the serious interference of matrix elements such as Mg and Fe, it is difficult to determine the low contents of REEs in peridotite (∑REEs=0.1-1 ...
LI Wei-liang, CHENG Xiu-hua, LI Zhong-yu, WANG Peng   +3 more
doaj   +1 more source

Experimental study and reaction path modeling of the carbonation of natural serpentinites [PDF]

arXiv, 2021
Mineralization of carbon dioxide is often seen as an attractive alternative to classical Carbon Capture and Storage (CCS) technologies, allowing the sequestration of \ce{CO2} as a solid mineral with no risk of aquifer contamination or leakage back to the atmosphere.
arxiv  

Devolatilization of Subducting Slabs, Part I: Thermodynamic Parameterization and Open System Effects [PDF]

Geochemistry, Geophysics,Geosystems, 20 (2019), 2019
The amount of H$_2$O and CO$_2$ that is carried into deep mantle by subduction beyond subarc depths is of fundamental importance to the deep volatile cycle but remains debated. Given the large uncertainties surrounding the spatio-temporal pattern of fluid flow and the equilibrium state within subducting slabs, a model of H$_2$O and CO$_2$ transport in ...
arxiv   +1 more source

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   +6 more sources

THERMOBAROMETRY OF DEPLETED PERIDOTITES

Geodynamics & Tectonophysics
An assessment was made of the possibility of using olivine thermobarometry for xenoliths of depleted peridotites from the Udachnaya pipe (Yakutia), represented by 76 megacrystalline dunites and 5 megacrystalline harzburgites. Specially developed and tested method of microprobe analysis was used to determine Al and Ca microimpurities in the olivine ...
L. N. Pokhilenko, V. N. Korolyuk, N. P. Pokhilenko   +2 more
openaire   +2 more sources

Ductile deformation during carbonation of serpentinized peridotite

Nature Communications, 2022
Mantle rocks can efficiently bind carbon by reaction with CO2 if fluid pathways remain open. This study of samples from Oman demonstrates that coupling of synchronous reaction and deformation facilitates fluid flow and massive carbon sequestration.
Manuel D. Menzel, Janos L. Urai, Estibalitz Ukar, Greg Hirth, Alexander Schwedt, András Kovács, Lidia Kibkalo, Peter B. Kelemen   +7 more
doaj   +1 more source

Conversion of pyridoxal to pyridoxamine with NH3 and H2 on nickel generates a protometabolic nitrogen shuttle under serpentinizing conditions

The FEBS Journal, EarlyView.
Recent studies show that Ni0 catalyzes amino acid synthesis from 2‐oxoacids via reductive amination. We show that the cofactor pyridoxal is reductively aminated to pyridoxamine, the NH2‐transferring intermediate of transaminations, with NH3 (~ 5 mm) and H2 (5 bar) on Ni0 catalysts within hours in water under serpentinizing hydrothermal vent conditions (
Manon Laura Schlikker, Max Brabender, Loraine Schwander, Carolina Garcia Garcia, Maximillian Burmeister, Sabine Metzger, Joseph Moran, William F. Martin   +7 more
wiley   +1 more source

The Meaning of Pressure for Primary Magmas: New Insights From PRIMELT3‐P

Geochemistry, Geophysics, Geosystems, 2023
This paper reports new software, PRIMELT3‐P, for computing the pressure and temperature range over which a primary basaltic magma was formed by adiabatic decompression and fractional melting of fertile mantle peridotite.
Claude T. Herzberg, Paul D. Asimow, Juan David Hernández‐Montenegro   +2 more
doaj   +1 more source

Experimental determination of ferric iron partitioning between pyroxene and melt at 100KPa [PDF]

arXiv, 2020
Pyroxene is the principal host of Fe$^{3+}$ in basalt source regions, hosting 79 and 81% of the Fe$^{3+}$ in spinel and garnet lherzolite, respectively, with opx and cpx hosting 48% and 31%, respectively, of the total Fe$^{3+}$ in spinel peridotite. To better understand partitioning of Fe$^{3+}$ between pyroxene and melt we conducted experiments at 100
arxiv  

Viscosity of anhydrous and hydrous peridotite melts

Chemical Geology, 2023
The melt viscosity (η) of anhydrous and hydrous peridotite was investigated using a multipronged approach combining micropenetration viscometry, conventional DSC, flash DSC and Brillouin spectroscopy. Raman spectroscopy measurements were used to verify the absence of crystallization and/or degassing during high-temperature measurements of these ...
Di Genova, Danilo, Bondar, Dmitry, Zandonà, Alessio, Valdivia, Pedro, Al-Mukadam, Raschid, Fei, Hongzhan, Withers, Anthony C., Boffa Ballaran, Tiziana, Kurnosov, Alexander, McCammon, Catherine, Deubener, Joachim, Katsura, Tomoo   +11 more
openaire   +2 more sources