Results 11 to 20 of about 2,860,718 (307)

High-Temperature and High-Pressure Phase Transition of Natural Barite Investigated by Raman Spectroscopy and Electrical Conductivity

open access: yesFrontiers in Earth Science, 2022
We investigated the structural, vibrational, and electrical transport properties for natural barite under the conditions of 298–873 K and 1.5–35.0 GPa using a diamond anvil cell by virtue of Raman spectroscopy and electrical conductivity measurements ...
Meiling Hong   +7 more
doaj   +1 more source

Superionic effect and anisotropic texture in Earth’s inner core driven by geomagnetic field

open access: yesNature Communications, 2023
Earth’s inner core is heterogeneous and anisotropic. A new study based on computational simulation reveals the presence of ionic hydrogen flux in iron crystals, driven by the dipole geomagnetic field, which promotes the formation of observed inner core ...
Shichuan Sun   +7 more
doaj   +1 more source

Remediation of Annular Gas Migration along Cemented Wellbores Using Reactive Mineral Fluids: Experimental Assessment of Sodium Bicarbonate and Sodium Silicate-Based Solutions

open access: yesEnergies, 2021
Achieving zonal isolation along wellbores is essential for upholding the containment integrity of subsurface reservoirs and preventing fluid seepage to the environment.
Timotheus K. T. Wolterbeek   +1 more
doaj   +1 more source

The Phase Transition and Dehydration in Epsomite under High Temperature and High Pressure

open access: yesCrystals, 2020
The phase stability of epsomite under a high temperature and high pressure were explored through Raman spectroscopy and electrical conductivity measurements in a diamond anvil cell up to ~623 K and ~12.8 GPa.
Linfei Yang   +5 more
doaj   +1 more source

Influence of Saline Fluids on the Electrical Conductivity of Olivine Aggregates at High Temperature and High Pressure and Its Geological Implications

open access: yesFrontiers in Earth Science, 2021
The electrical conductivities of hydrous olivine (Ol) aggregates and Ol–H2O, Ol–NaCl–H2O (salinity: 1–21 wt%; fluid fraction: 5.1–20.7 vol%), Ol–KCl–H2O (salinity: 5 wt%; fluid fraction: 10.9–14.0 vol%) and Ol–CaCl2–H2O systems (salinity: 5 wt%; fluid ...
Wenqing Sun   +13 more
doaj   +1 more source

Electrical conductivity of siderite and its implication for high conductivity anomaly in the slab-mantle wedge interface

open access: yesFrontiers in Earth Science, 2022
Carbonate minerals as a dominant carbon host can be transported to the Earth’s deep interior via subduction of the oceanic lithosphere, and their physicochemical behavior potentially has a significant influence on the compositional heterogeneity and ...
Haiying Hu   +6 more
doaj   +1 more source

H2-Induced Pressure Broadening and Pressure Shift in the P-Branch of the v3 Band of CH4 from 300 to 700 K [PDF]

open access: yes, 2019
For accurate modelling of observations of exoplanet atmospheres, quantification of the pressure broadening of infrared absorption lines for and by a variety of gases at elevated temperatures is needed.
Bechtel, Hans A.   +3 more
core   +2 more sources

Highly responsive ground state of PbTaSe$_2$: structural phase transition and evolution of superconductivity under pressure [PDF]

open access: yes, 2017
Transport and magnetic studies of PbTaSe$_2$ under pressure suggest existence of two superconducting phases with the low temperature phase boundary at $\sim 0.25$ GPa that is defined by a very sharp, first order, phase transition.
Besser, Matthew   +15 more
core   +5 more sources

Thermal equation of state of the main minerals of eclogite: Constraining the density evolution of eclogite during the delamination process in Tibet [PDF]

open access: yesSolid Earth, 2022
Tibet, which is characterized by collisional orogens, has undergone the process of delamination or convective removal. The lower crust and mantle lithosphere appear to have been removed through delamination during orogenic development.
Z. Ye   +7 more
doaj   +1 more source

An investigation into the role of time-dependent cohesion in interseismic fault restrengthening

open access: yesScientific Reports, 2019
Earthquakes typically exhibit recurrence times that far exceed time-scales attainable in a laboratory setting. To traverse the temporal gap between the laboratory and nature, the slide-hold-slide test is commonly employed as a laboratory analogue for the
M. P. A. van den Ende, A. R. Niemeijer
doaj   +1 more source

Home - About - Disclaimer - Privacy