High temperature evaporation and isotopic fractionation of K and Cu

Neuman, Mason; Holzheid, Astrid; Lodders, K.; Fegley, B.; Jolliff, Bradley L.; Koefoed, Piers; Chen, Heng; Wang, Kun

doi:10.1016/j.gca.2021.09.035

Cited by 12 publications

(2 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The two elements most enriched in the surface glasses of Crater No. 4, namely K (similar to Rb) and Cu, are known from cosmochemistry to be moderately volatile and characterized by significant evaporative loss from material of approximately chondritic composition (e.g., [39,40]). However, no systematic depletion in K of the melts from dozens of terrestrial impact craters (including strongly expanded pumice glasses) can be inferred (e.g., [30,41], and references therein); there are few data on Cu.…”

Section: Composition Of Glassesmentioning

confidence: 99%

Comparison of Melting-Affected Rocks from Presumed Small Impact Craters and Old Limekilns in Bavaria, Germany

Procházka,

Herrmann,

Kalenda

et al. 2024

Preprint

View full text Add to dashboard Cite

Depressions containing partially molten rocks were investigated in Quaternary pebbly sedi-ments in Alpine foreland in Bavaria, Germany. Ruins of limekilns from 18-19th centuries are abundant around Seeshaupt. They are usually associated with earthworks for fuel feeding and protection from wind. Depressions contain partially molten stones from furnace walls, with lime and burnt loam remnants. On the surface of pebbles (typically gneisses), green glass formed with chemical composition possibly affected by moderately volatile components of wood biomass, mainly K and Cu. Thermoplastic deformation of pebbles is limited and the sur-face melt deformation points to slow flow. At Emmerting, on the other hand, two walled circu-lar depressions which lack additional earthworks have been identified as possible impact cra-ters. Thermally affected pebbles show much more intense deformation. Colorless to greenish glass, also K and Cu enriched, usually forms only thin surface coatings, in places covered by younger melt extruded from pebble interior. Burnt loam is missing. At Grabenstätt-Kaltenbach, a depression of unclear origin was investigated. Morphologically, it matches craters rather than limekilns, but anthropogenic contamination (brick-like material) is probable. The rare molten samples do not display extreme deformation features. The thermally affected stones, mainly those from Emmerting, have elevated magnetic susceptibility.

show abstract

Section: Composition Of Glassesmentioning

confidence: 99%

Comparison of Melting-Affected Rocks from Presumed Small Impact Craters and Old Limekilns in Bavaria, Germany

Procházka,

Herrmann,

Kalenda

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…For example, the ongoing debate about nebular versus planetary mechanisms responsible for meteoritic and terrestrial abundances of the moderately volatile elements (MVE) and Earth's volatility trend (e.g., Braukmüller et al 2019, Fegley et al 2020 dates back over 45 years to the MVE condensation calculations of Wai and Wasson (1977) and the discussion of lunar and terrestrial siderophile and volatile elemental abundances by Ringwood and Kesson (1977). Isotopic evidence for MVE depletion during planetary formation, and experimental and theoretical studies of major element and MVE evaporative loss from meteorite parent bodies, the Moon, and Mars after dissipation of the solar nebula are attracting increased attention (Canup et al 2015, Lock et al 2018, Jiang et al 2019, 2020, Ivanov et al 2022, Neuman et al 2022, Tian et al 2021, Zhang et al 2021.…”

Section: Introductionmentioning

confidence: 99%