Results 251 to 260 of about 531,343 (389)

Cosmic ray exposure ages and pre‐atmospheric shielding of Omani meteorites: Implications for 14C and 14C/10Be terrestrial ages of meteorites from hot and cold deserts

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract We present isotope concentrations of the light noble gases He and Ne for samples from five well‐documented strewnfields and two individual meteorites from the Omani desert. Cosmogenic (22Ne/21Ne)cos for the strewnfield samples are low, as expected considering the total known masses.
Mohammad Tauseef   +2 more
wiley   +1 more source

Radioisotopic age constraints of the Cambrian Ritland impact structure, Norway

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Secondary ion mass spectrometry U‐Pb geochronology has been performed on zircon grains separated from impact melt rock from the 2.7 km‐in‐diameter Ritland impact structure, southwestern Norway. Scanning electron microscope‐based imaging techniques, including electron backscatter diffraction analysis, reveal various zircon grain microtextures ...
William R. Hyde   +6 more
wiley   +1 more source

Challenges to the [Formula: see text]CDM cosmology. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci
Efstathiou G.
europepmc   +1 more source

Isotopic analysis of tochilinite (carbonate and magnetite) in Winchcombe: Temperature constraints on early‐stage aqueous alteration in the CM parent body

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract We report the first oxygen isotope measurements of tochilinite (δ17O: 11.0 ± 2.1‰, δ18O: 23.5 ± 4.0‰ and Δ17O: −1.1 ± 1.2‰) in a CM chondrite (Winchcombe, lithology C [CM2.2/2.3]). We analyzed type‐I tochilinite‐cronstedtite intergrowths (TCIs)—formed by pseudomorphic replacement of kamacite.
M. D. Suttle   +7 more
wiley   +1 more source

2025 Jessberger Award to Prof. Vinciane Debaille

open access: yes
Meteoritics &Planetary Science, EarlyView.
Allan Treiman   +4 more
wiley   +1 more source

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