Results 231 to 240 of about 169,014 (352)

Small‐scale elemental abundance variations in Ryugu particles from touchdown 1

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Ryugu materials closely resemble CI chondrites' mineralogical, chemical, and isotopic compositions; yet minor but resolvable differences in certain elemental abundances are evident. In this study, the bulk chemical compositions of eight individual Ryugu particles (1.5–4.3 mg) from the first touchdown site (TD1) were determined using triple ...
Karina López García   +6 more
wiley   +1 more source

Uranium sorption on calcite and degraded portland cement paste [PDF]

open access: gold
Marta López-García   +7 more
openalex   +1 more source

Non‐innocent solvents in meteorite extractions: Evidence for artifact formation

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Solvent extraction is a cornerstone of meteoritic organic and inorganic chemistry, yet the assumption that common solvents act as chemically inert media is becoming increasingly untenable. This study reports that low‐molecular‐weight alcohols, particularly methanol and ethanol, are “non‐innocent” solvents when used to extract soluble sulfur ...
N. Randazzo   +6 more
wiley   +1 more source

Microbially-induced carbonate precipitation in coal-associated environments: opportunities and challenges. [PDF]

open access: yesFront Microbiol
Tastambek K   +10 more
europepmc   +1 more source

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska   +6 more
wiley   +1 more source

Uptake of H<sup>14</sup>CO<sub>3</sub> <sup>-</sup>/<sup>14</sup>CO<sub>3</sub> <sup>2-</sup> by calcite: impact of ISA and chloride. [PDF]

open access: yesRSC Adv
Guidone RE   +8 more
europepmc   +1 more source

Sequential precipitation of a new goethite–calcite nanocomposite and its possible application in the removal of toxic ions from polluted water

open access: green, 2012
German Montes‐Hernandez   +5 more
openalex   +2 more sources

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson   +3 more
wiley   +1 more source

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