Results 41 to 50 of about 13,405 (212)

New evidence on the formation conditions of the Libyan Desert Glass (Western Egypt): Clues from a dendritic zircon inclusion

Meteoritics &Planetary Science, EarlyView.
Abstract Libyan Desert Glass (LDG) is an ~29 million years old, silica‐rich glass found in Western Egypt. Whether this glass formed in an impact cratering context associated with the hypervelocity collision of a cometary/asteroidal body or radiative heating during an airburst is debated. Determination of the formation temperatures and pressures of rare
Niccolò Magnani, Enrico Mugnaioli, Sofia Lorenzon, Lidia Pittarello, Tatiana E. Gorelik, Matteo Masotta, Luigi Folco   +6 more
wiley   +1 more source

The effect of early diagenetic processes on the quantification of fossil micrometeorite abundance and flux in the geological record

Meteoritics &Planetary Science, EarlyView.
Abstract Fossil micrometeorites (MMs) recovered from lithified sedimentary rocks, particularly iron‐rich (I‐type) cosmic spherules (CSs) provide valuable insights into past dust‐forming events. Their abundances, when combined with estimates of local sedimentation rates can be used to reconstruct the flux of extraterrestrial dust.
Isabelle S. Mattia, Matthew J. Genge, Martin D. Suttle   +2 more
wiley   +1 more source

Dynamic evolution of major element chemistry in protoplanetary disks and its implications for Earth-enstatite chondrite connection [PDF]

, 2021
Yoshinori Miyazaki, Jun Korenaga
openalex   +1 more source

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, EarlyView.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source

Exploring the link between molecular cloud ices and chondritic organic matter in laboratory

Nature Communications, 2021
Several scenarios exist to explain the origins of the organic matter found in carbonaceous chondrites. Here, the authors show laboratory experiments confirming that a significant portion of the soluble organic matter can originate from organic ices ...
G. Danger, V. Vinogradoff, M. Matzka, J-C. Viennet, L. Remusat, S. Bernard, A. Ruf, L. Le Sergeant d’Hendecourt, P. Schmitt-Kopplin   +8 more
doaj   +1 more source

Two faces of L-type asteroids

Astronomy & Astrophysics
Context. L-types are a rare class of asteroids whose spectra indicate similarities with CO and CV chondrites, suggesting high abundances of refractory inclusions, particularly with respect to the calcium-aluminium-rich inclusion.
Mahlke M., Marsset M., Devogèle M., Baklouti D., Beck P., Bonal L., Brunetto R., Lantz C., Tanga P.   +8 more
doaj   +1 more source

Multiwall and bamboo-like carbon nanotubes from the Allende chondrite: A probable source of asymmetry.

PLoS ONE, 2019
This study presents multiwall and bamboo-like carbon nanotubes found in samples from the Allende carbonaceous chondrite using high-resolution transmission electron microscopy (HRTEM).
Hugo I Cruz-Rosas, Francisco Riquelme, Patricia Santiago, Luis Rendón, Thomas Buhse, Fernando Ortega-Gutiérrez, Raúl Borja-Urby, Doroteo Mendoza, Carlos Gaona, Pedro Miramontes, Germinal Cocho   +10 more
doaj   +1 more source

TAXONOMIC REVIEW OF CHONDRITES AFFINIS (STERNBERG, 1833) FROM CRETACEOUS-NEOGENE OFFSHORE-DEEP-SEA TETHYAN SEDIMENTS AND RECOMMENDATION FOR ITS FURTHER USE

Rivista Italiana di Paleontologia e Stratigrafia, 2012
The branched trace fossil Chondrites affinis (Sternberg, 1833), synonymised so far with C. targionii (Brongniart, 1828), has been analyzed in an exceptionally well preserved specimen from the Saraceno Formation (?Upper Cretaceous; ?Eocene-Miocene) in the
ALFRED UCHMAN, CLAUDIA CARUSO, MAURIZIO SONNINO   +2 more
doaj   +1 more source

Influence of Rare Earth Elements on Prebiotic Reaction Networks Resembling the Biologically Relevant Krebs Cycle

Angewandte Chemie, Volume 138, Issue 4, 22 January 2026.
Rare earth elements can act as mediators in a prebiotic reaction network, producing various intermediates of the citric acid cycle starting from glyoxylate and pyruvate. The ionic radius and the resulting variation in Lewis acidity has a significant influence on the observed product scope.
Jonathan Gutenthaler‐Tietze, Carolina G. Heßler, Lena J. Daumann   +2 more
wiley   +2 more sources

The effect of terrestrial weathering on the magnetic properties of meteorites from the Atacama Desert

Учёные записки Казанского университета: Серия Естественные науки
Once ordinary chondrites fall on Earth, Fe–Ni minerals and troilite they contain oxidize and transform into iron oxyhydroxides and/or iron oxides, which is expected to modify their magnetic properties.
D. Kuzina, J. Gattacceca, H. Gouilloux, H. Mertens, R. Lacube, F. Demory, C. Lorenz   +6 more
doaj   +1 more source