Zobrazeno 1 - 10
of 153
pro vyhledávání: '"Barbara Etschmann"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-8 (2024)
Abstract A plutonium-rich carbide, (U,Pu)(Al,Fe)3C3, was discovered in a hot particle from the Maralinga nuclear testing site in South Australia. The particle was produced between 1960 and 1963 and has been exposed to ambient conditions since then. T
Externí odkaz:
https://doaj.org/article/d3af2b2b4f2f4f3d9dfc82555ffcd85c
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-11 (2022)
In-situ X-ray measurements reveal that the formation of rare earth-carbonate complexes in high-temperature alkaline fluids may facilitate their hydrothermal mobilization and contribute to their economic concentration in carbonatitic systems.
Externí odkaz:
https://doaj.org/article/b0660c187941432ea2d0f8a8d5e33b82
Autor:
Owen P. Missen, Ella R. Lausberg, Joël Brugger, Barbara Etschmann, Stuart J. Mills, Koichi Momma, Rahul Ram, Mihoko Maruyama, Xi-Ya Fang, Erik Melchiorre, Christopher G. Ryan, Edgar E. Villalobos-Portillo, Hiram Castillo-Michel, Kiyofumi Nitta, Oki Sekizawa, Jeremiah Shuster, Santonu K. Sanyal, Andrew Frierdich, Steve Hunt, Yuka Tsuri, Yuriko Takahashi, Uta Michibata, Sahil Dwivedi, Maria A.D. Rea
Publikováno v:
Journal of Hazardous Materials Letters, Vol 3, Iss , Pp 100053- (2022)
Tellurium (Te) is a Critical Element that is toxic to microorganisms and humans alike, most notably in its soluble oxyanionic forms. To date, the biogeochemical behaviour of Te in Earth’s surface environment is largely unknown. Here, we report the
Externí odkaz:
https://doaj.org/article/9ab631d3ccf748f7a8cd151b5ba3cc65
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
This paper reveals that potassic alteration can be triggered by Na-rich fluids, indicating that pervasive sequential sodic and potassic alterations associated with mineralization in some of the world’s largest ore deposits may not necessarily refle
Externí odkaz:
https://doaj.org/article/599479136cb8418689f1a63f6975ac22
Autor:
Megan Cook, Barbara Etschmann, Rahul Ram, Konstantin Ignatyev, Gediminas Gervinskas, Steven D. Conradson, Susan Cumberland, Vanessa N. L. Wong, Joёl Brugger
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract The high-energy release of plutonium (Pu) and uranium (U) during the Maralinga nuclear trials (1955–1963) in Australia, designed to simulate high temperature, non-critical nuclear accidents, resulted in wide dispersion µm-sized, radioacti
Externí odkaz:
https://doaj.org/article/dfe3c1f85f764b8f8b9ad13fc0c36cfc
Autor:
Yanlu Xing, Joël Brugger, Barbara Etschmann, Andrew G. Tomkins, Andrew J. Frierdich, Xiya Fang
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)
Trace amounts of Cerium can act as a catalyst by enhancing fluid-mediated magnetite alteration, which preconditions ore systems and could contribute to the large size and metal content of world-class ore deposits.
Externí odkaz:
https://doaj.org/article/75522ef46c0c4d7682c0c390e0506d41
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 21, Iss 5, Pp n/a-n/a (2020)
Abstract The HighPGibbs program is designed to calculate thermodynamic equilibrium of fluid‐rock systems up to depths of lithospheric mantle. It uses the Gibbs free energy minimization function of the HCh package to calculate mineral‐fluid equili
Externí odkaz:
https://doaj.org/article/a0a0624759164896abefafa8c22d8cbc
Publikováno v:
Crystals, Vol 10, Iss 11, p 1032 (2020)
Sulphur is the third most abundant volatile element in deep Earth systems. Analytical methods for accurately and efficiently determining the sulphur content and oxidation state in natural minerals are still lacking. Natural apatite is widely distribu
Externí odkaz:
https://doaj.org/article/76cffc8dbe324aff982f445cb598ccc2
Publikováno v:
Geofluids, Vol 2018 (2018)
Uranium mineralization is commonly accompanied by enrichment of fluorite and other F-bearing minerals, leading to the hypothesis that fluoride may play a key role in the hydrothermal transport of U. In this paper, we review the thermodynamics of U(IV
Externí odkaz:
https://doaj.org/article/68d51257ed9b4ed2be3653f7945f13e9
Publikováno v:
Geosciences, Vol 8, Iss 12, p 480 (2018)
Terraced iron formations (TIFs) are laminated structures that cover square meter-size areas on the surface of weathered bench faces and tailings piles at the Mount Morgan mine, which is a non-operational open pit mine located in Queensland, Australia
Externí odkaz:
https://doaj.org/article/5815d73ceaa34b1c95a9b36662193f13