• Corpus ID: 247779357

CaS: A key medium for C-O-S-Ca cycles in Earth

@inproceedings{Liu2022CaSAK,
  title={CaS: A key medium for C-O-S-Ca cycles in Earth},
  author={Yuegao Liu and I‐Ming Chou and Jiangzhi Chen and Nanping Wu and Shenghua Mei and Liping Wang},
  year={2022}
}
Oldhamite (CaS) is a rare mineral, which is only observed naturally in enstatite meteorites. No occurrence of CaS has been documented from other groups of meteorites and terrestrial samples 1 . However, in experiments at 1.5 GPa / 1510 K and 0.5 GPa / 1320 K, when the lg fo 2 is lower than – 10.57 (FMQ – 0.52), CaS was produced in this study by a two-melt mechanism involving the reaction between molten pyrrhotite-pentlandite-bearing orthopyroxenite and molten CaCO 3 . CaS can be easily oxidized… 

Figures from this paper

References

SHOWING 1-10 OF 45 REFERENCES
Experiments on Condensation of Calcium Sulfide Grains To Demarcate Environments for the Formation of Enstatite Chondrites
To achieve a better understanding of material evolution in the early solar system, experiments have been performed to constrain the environments in which many of the dust grains formed. Sulfur is an
The oxidation state of the mantle and the extraction of carbon from Earth’s interior
TLDR
The equilibrium also indicates that the relative oxygen fugacity of garnet-bearing rocks will increase with decreasing depth during adiabatic decompression, which implies that carbon in the asthenospheric mantle will be hosted as graphite or diamond but will be oxidized to produce carbonate melt through the reduction of Fe3+ in silicate minerals during upwelling.
Native iron (–platinum) ores from the Siberian Platform trap intrusions
Native iron occurs in two forms: terrestrial (telluric) and meteoritic. The former was considered to be poor in trace elements, whereas the latter contains varying amounts of Ni–Fe alloys, including
The redox state, FeO content, and origin of sulfur‐rich magmas on Mercury
MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) orbital observations of Mercury have revealed elevated S abundances, Ca‐S and Mg‐S correlations, and a low upper limit for
...
...