Results 21 to 30 of about 13,015 (272)

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

Fluid evolution in CM carbonaceous chondrites tracked through the oxygen isotopic compositions of carbonates [PDF]

, 2017
The oxygen isotopic compositions of calcite grains in four CM carbonaceous chondrites have been determined by NanoSIMS, and results reveal that aqueous solutions evolved in a similar manner between parent body regions with different intensities of ...
Alexander, Alexander, Barber, Benedix, Bland, Bonal, Bunch, Burbine, Clark, Clayton, Clayton, de Leuw, DuFresne, Emery, Fujiya, Fujiya, Guo, Hewins, Horita, Howard, I.A. Franchi, Jenniskens, Johnson, Kasuga, Lauretta, Lee, Lee, Lee, Lee, Lee, Lee, Lindgren, Lindgren, M.R. Lee, Marrocchi, McSween, McSween, N.A. Starkey, P. Lindgren, Palguta, Rubin, Rubin, Starkey, Tomeoka, Tyra, Tyra, Tyra, Velbel, Young, Young   +49 more
core   +2 more sources

Stellar Outbursts and Chondrite Composition

The Astrophysical Journal, 2023
The temperatures of observed protoplanetary disks are not sufficiently high to produce the accretion rate needed to form stars, nor are they sufficient to explain the volatile depletion patterns in CM, CO, and CV chondrites and terrestrial planets.
Min Li, Zhaohuan Zhu, Shichun Huang, Ning Sui, Michail I. Petaev, Jason H. Steffen   +5 more
doaj   +1 more source

A divergent heritage for complex organics in Isheyevo lithic clasts [PDF]

, 2017
Primitive meteorites are samples of asteroidal bodies that contain a high proportion of chemically complex organic matter (COM) including prebiotic molecules such as amino acids, which are thought to have been delivered to Earth via impacts during the ...
Alexander, Alexander, Alexander, Alexander, Alexander N. Krot, Alt, Altwegg, Aléon, Becker, Belloche, Bergin, Biver, Bizzarro, Bockelée-Morvan, Bollard, Bonal, Bonal, Briani, Brownlee, Bunch, Busemann, Chakraborty, Ciesla, Clayton, Cleeves, Cleeves, Coakley, Cobb, Cody, Cody, Cooper, Daniel P. Wielandt, Davidson, De Gregorio, De Gregorio, De Marcellus, De Marcellus, Deloule, Dodson-Robinson, Doyle, Dworkin, Ehrenfreund, Elishevah M.M.E. van Kooten, Fitzsimons, Floss, Franke, Garenne, Garvie, Grady, Hartogh, Heays, Herbst, Hily-Blant, Hily-Blant, Ian A. Franchi, Injerd, Iqbal, Ishii, Ivanova, Jes K. Jørgensen, Jon P. Ramsey, Jørgensen, Kazuhide Nagashima, Kebukawa, Keller, Kerridge, King, Krot, Kuga, Lajaunie, Larsen, Laurent, Le Guillou, Lis, Lyons, Martin Bizzarro, Martin Schiller, Marty, Marty, Messenger, Millar, Mumma, Mūller, Nakamura-Messenger, Paton, Piani, Pizzarello, Pizzarello, Pizzarello, Remusat, Remusat, Remusat, Robert, Rodgers, Roueff, Schrader, Shinnaka, Starkey, Susanne F. Wampfler, Søren Frimann, Takeshi Kasama, Terzieva, Tomeoka, Van Kooten, Vollmer, Walsh, Wampfler, Wasson, Weisberg, Wirström, Yabuta, Yang, Zega, Zoltan I. Balogh, Zubavichus   +114 more
core   +3 more sources

Distribution of s-, r-, and p-process Nuclides in the Early Solar System Inferred from Sr Isotope Anomalies in Meteorites

The Astrophysical Journal Letters, 2023
Nucleosynthetic isotope anomalies in meteorites allow distinguishing between the noncarbonaceous (NC) and carbonaceous (CC) meteorite reservoirs and show that correlated isotope anomalies exist in both reservoirs.
Jonas M. Schneider, Christoph Burkhardt, Thorsten Kleine   +2 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

Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu

The Astrophysical Journal Letters, 2023
Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites.
Laurette Piani, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ken-ichi Bajo, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Liping Qin, Sara S. Russell, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto   +87 more
doaj   +1 more source

Tetrataenite in carbonaceous chondrites.

Proceedings of the Japan Academy, Series B, 1990
Presence of tetrataenite grains has been recently confirmed in Yamato 791717 carbonaceous (CO3) chondrite. The observed coexistence of tetrataenite fine grains with more abundant magnetite and kamacite in this CO3 chondrite suggests that the tetrataenite grains were directly formed by a coalescence process of Fe and Ni fine particle smokes in the solar
Takesi NAGATA, Barbara J. CARLETON
openaire   +2 more sources

Stability toward High Energy Radiation of Non-Proteinogenic Amino Acids: Implications for the Origins of Life

Life, 2013
A series of non-proteinogenic amino acids, most of them found quite commonly in the meteorites known as carbonaceous chondrites, were subjected to solid state radiolysis in vacuum to a total radiation dose of 3.2 MGy corresponding to 23% of the total ...
Yaser Hafez, Giancarlo Angelini, Franco Cataldo, Susana Iglesias-Groth   +3 more
doaj   +1 more source

The message of oldhamites from enstatite chondrites

Progress in Earth and Planetary Science, 2022
We have determined rare-earth element (REE) abundances in oldhamites (CaS) from 13 unequilibrated and equilibrated enstatite chondrites (5 EH and 8 EL) and in a few enstatites by in situ, laser ablation ICP-MS.
Tahar Hammouda, Maud Boyet, Paul Frossard, Camille Cartier   +3 more
doaj   +1 more source