Results 71 to 80 of about 1,324 (171)

Equations of state of iron sulfide and constraints on the sulfur content of the Earth [PDF]

open access: yes, 1979
New shock and release wave data for pyrrhotite (Fe_(0.9)S) obtained over the pressure range of 3–158 GPa (0.03–1.58 Mbar) suggest that this mineral undergoes a major shock-induced phase change(s) with an onset in the range 2.7–3.8 GPa.
Ahrens, Thomas J.
core   +1 more source

A Hyperactive Geomagnetic Field in the Late Visean (Early Carboniferous) From the Late Asbian Stratotype Section in Northwest England, UK

open access: yesGeochemistry, Geophysics, Geosystems, Volume 25, Issue 4, April 2024.
Abstract The pattern of geomagnetic polarity changes during the Early Carboniferous (Mississippian) is not known in detail. This information sparsity is addressed by determining a magnetostratigraphy from the late Asbian (late Visean at ∼333 Ma) in Trowbarrow Quarry, UK. This is the stratotype section of the late Asbian and has a detailed foraminiferal
Mark W. Hounslow   +5 more
wiley   +1 more source

The solubility of sulphur in hydrous rhyolitic melts.

open access: yes, 2004
Experiments performed at 2 kbar, in the temperature range 800–1000°C, with fO2 between NNO–2·3 and NNO+2·9 (where NNO is the nickel–nickel oxide buffer), and varying amounts of sulphur added to hydrous metaluminous rhyolite bulk compositions, were used ...
Clémente, Béatrice   +2 more
core   +4 more sources

Magnetic properties of hydrothermally synthesized greigite (Fe3S4)- II. High- and low-temperature characteristics [PDF]

open access: yes, 1999
The magnetic behaviour of hydrothermally synthesized greigite was analysed in the temperature range from 4 K to 700 °C. Below room temperature, hysteresis parameters were determined as a function of temperature, with emphasis on the temperature range ...
Dekkers, M.J.   +2 more
core  

Understanding fine magnetic particle systems through use of first-order reversal curve diagrams

open access: yes, 2014
First-order reversal curve (FORC) diagrams are constructed from a class of partial magnetic hysteresis loops known as first-order reversal curves and are used to understand magnetization processes in fine magnetic particle systems.
Heslop, David   +3 more
core   +1 more source

Electronic reconstruction of hexagonal FeS: a view from density functional dynamical mean-field theory [PDF]

open access: yes, 2017
We present a detailed study of correlation- and pressure-induced electronic reconstruction in hexagonal iron monosulfide, a system which is widely found in meteorites and one of the components of Earth's core.
Craco, L.   +2 more
core   +1 more source

Stability and solubility of arsenopyrite, FeAsS, in crustal fluids.

open access: yes, 2002
The stability and solubility of natural arsenopyrite (FeAsS) in pure water and moderately acid to slightly basic aqueous solutions buffered or not with H2 and/or H2S were studied at temperatures from 300 to 450°C and pressures from 100 to 1000 bar.
Kara, Sami   +2 more
core   +3 more sources

Mineral chemistry of In-bearing minerals in the Santa Fe mining district, Bolivia [PDF]

open access: yes, 2018
The Santa Fe mining district is located in the Central Andean tin belt of Bolivia and contains several SnZn-Pb-Ag deposits. From the economic point of view, the most important deposits of the district are Japo, Santa Fe and Morococala.
Alfonso Abella, María Pura   +3 more
core   +3 more sources

Heterogeneous Electro-Fenton-Catalyzed Degradation of Rhodamine B by Nano-Calcined Pyrite. [PDF]

open access: yesInt J Environ Res Public Health, 2023
Tan Y   +7 more
europepmc   +1 more source

The minerals of Tasmania [PDF]

open access: yes, 1900
To the geologist, the fascinating science of mineralogy must always be of the utmost importance, as it defines with remarkable exactitude the chemical constituents and combinations of rock masses, and, thus interpreting their optical and physical ...
Petterd, William Frederick
core  

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