Results 31 to 40 of about 446 (179)

The Origin and Physico-Chemical Properties of Some Unusual Earth Rock Fragments

Applied Sciences, 2022
In this paper, several researches were undertaken related to a violent phenomenon, characterized by a sonic boom, felt on an area of at least 500 km2, shortly followed by the fall of rock fragments that were then recovered from the ground.
Alexandru Cocean, Cristina Postolachi, Georgiana Cocean, Georgiana Bulai, Bogdanel Silvestru Munteanu, Nicanor Cimpoesu, Iuliana Cocean, Silviu Gurlui   +7 more
doaj   +1 more source

Thermal history of an amoeboid olivine aggregate in the early solar nebula

Meteoritics &Planetary Science, EarlyView.
Abstract Carbonaceous chondrites commonly contain amoeboid olivine aggregates (AOAs). Here, we investigated an AOA in the CR chondrite Y‐793261. This AOA contains an unstable assemblage of forsterite and quartz. We found a rare occurrence of enstatite and quantitatively discuss its formation process.
M. Kimura, N. Imae, M. Komatsu, A. Yamaguchi   +3 more
wiley   +1 more source

High‐pressure phase preservation in ordinary L‐chondrite melt veins: Evidence for control by post‐shock thermal evolution

Meteoritics &Planetary Science, Volume 61, Issue 10, Page 2549-2566, October 2026.
Abstract This study investigates the petrography and mineralogy of three L‐type ordinary chondrite meteorites: Northwest Africa (NWA) 4137 (L6), Homestead (L5), and Kunashak (L6). We studied the shock‐related deformation features in the matrix and the characteristics of the melt veins, including the presence or absence of high‐pressure (HP) phases. Our
S. Effraimidou, I. Baziotis, M. Simopoulou, L. Ferrière, C. Sanchez‐Valle, S. Klemme, J. Berndt, P. D. Asimow   +7 more
wiley   +1 more source

Oxygen isotope thermometry and composition of aqueous fluids within the parent body of asteroid (101955) Bennu

Meteoritics &Planetary Science, Volume 61, Issue 10, Page 2567-2591, October 2026.
Abstract We report on the petrography and oxygen isotopic compositions from in situ analyses of carbonates (Ca‐carbonate, dolomite, and Fe‐rich magnesite), magnetite, and apatite in particles from asteroid Bennu. Using oxygen isotope thermometry of Ca‐carbonate, dolomite, and magnetite, we estimated crystallization temperatures and the oxygen isotopic ...
Gary R. Huss, Kazuhide Nagashima, Elena Dobrică, Alexander N. Krot, Gregory Cane, Zoe E. Wilbur, Timothy J. McCoy, Catherine M. Corrigan, Sara S. Russell, Jessica J. Barnes, Ann N. Nguyen, Harold C. Connolly Jr., Dante S. Lauretta   +12 more
wiley   +1 more source

THE Formation of chondrule-like particles in RF discharge plasma

Physical Sciences and Technology, 2023
Chondrules are fundamental components of chondritic meteorites and play a vital role in understanding the formation of the early solar system. This study focuses on the synthesis of chondrule-like particles in a plasma environment using a radiofrequency
Assan Abdirakhmanov, Madina Dauylbayeva, Baglan Kyrykbay, Akdaulet Baikaliyev, Sagi Orazbayev, Almasbek Utegenov, Maratbek Gabdullin, Tlekkabul Ramazanov, Didar Batryshev   +8 more
doaj   +1 more source

Reproduction Experiments of Radial Pyroxene Chondrules Using a Gas-jet Levitation System under Reduced Conditions

The Astrophysical Journal
Reproduction experiments of radial pyroxene (RP) chondrules were carried out using an Ar–H _2 or Ar gas-jet levitation system in a reducing atmosphere in order to simulate chondrule formation in the protoplanetary disk.
Kana Watanabe, Tomoki Nakamura, Tomoyo Morita   +2 more
doaj   +1 more source

Pattern Formation in Rocks

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract This commentary concerns a two‐part paper by Regenauer‐Lieb et al. (2026a, 2026b) on pattern formation in deforming porous rocks. The theory developed in part I (https://doi.org/10.1029/2025GC012710) uses the general idea of Turing's reaction‐diffusion model of morphogenesis based on interactions between two types of diffusible chemical ...
Jibamitra Ganguly
wiley   +1 more source

Oxygen isotope variability in the IIIAB iron meteorites and their relationship to main group pallasites

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2393-2405, September 2026.
Abstract The light element distribution in planetary cores and the processes driving core evolution in rocky planets are poorly understood. Magmatic iron meteorites are samples from the cores of ancient embryonic planetesimals and therefore provide a window into the processes governing core evolution. We performed high precision oxygen isotope analyses
R. J. Windmill, I. A. Franchi, X. Zhao, R. C. Greenwood, M. Anand   +4 more
wiley   +1 more source

Microstructural evidence for multiple generations of sulfide precipitation and impact‐induced thermal alteration under acidic conditions on Asteroid Ryugu

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2201-2217, September 2026.
Abstract Here we report on the microstructure and chemistry of sulfide minerals returned from asteroid (162173) Ryugu. We identify a unique sulfide population in particle A0016 composed of violarite (FeNi2S4), pyrite (FeS2), chalcopyrite (CuFeS2), pyrrhotite (Fe1‐xS), and pentlandite ([Fe,Ni]9S8).
M. C. Benner, B. S. Prince, D. L. Schrader, T. J. Zega   +3 more
wiley   +1 more source

Chondrule transport in protoplanetary discs [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
Accepted to MNRAS.
Goldberg, Aaron Z., Owen, James E., Jacquet, Emmanuel   +2 more
openaire   +3 more sources