Results 1 to 10 of about 12,511 (212)

Speciation of organosulfur compounds in carbonaceous chondrites [PDF]

Scientific Reports, 2021
Despite broad application of different analytical techniques for studies on organic matter of chondrite meteorites, information about composition and structure of individual compounds is still very limited due to extreme molecular diversity of ...
Alexander Zherebker, Yury Kostyukevich, Dmitry S. Volkov, Ratibor G. Chumakov, Lukas Friederici, Christopher P. Rüger, Alexey Kononikhin, Oleg Kharybin, Alexander Korochantsev, Ralf Zimmermann, Irina V. Perminova, Eugene Nikolaev   +11 more
doaj   +2 more sources

Impact-induced sublimation drives volatile depletion in carbonaceous meteorites [PDF]

Nature Communications
Carbonaceous chondrites are amongst the most chemically primitive solid materials in the Solar System, yet many are depleted in moderately volatile elements.
Zheng-Yu Long, Frederic Moynier, Tim F. J. Bögels, Linru Fang, Razvan Caracas, Marine Paquet, Fred Jourdan, Tu-Han Luu, Dimitri Rigoussen, Kun-Feng Qiu, Jun Deng, James M. D. Day   +11 more
doaj   +2 more sources

Impact-driven oxidation of organics explains chondrite shock metamorphism dichotomy [PDF]

Nature Communications
Shocked meteorites can be used to probe the dynamics of the early Solar system. Carbonaceous chondrites are less shocked than ordinary chondrites, regardless of the degree of aqueous alteration.
Kosuke Kurosawa, Gareth S. Collins, Thomas M. Davison, Takaya Okamoto, Ko Ishibashi, Takafumi Matsui   +5 more
doaj   +2 more sources

Origin of Earth’s hydrogen and carbon constrained by their core-mantle partitioning and bulk Earth abundance [PDF]

Nature Communications
Hydrogen and carbon concentrations in the Earth’s core are yet known. Here we determined their metal/silicate partition coefficients (D) simultaneously under typical conditions of core formation and found that D H and D C diminish in the presence of ...
Yutaro Tsutsumi, Naoya Sakamoto, Kei Hirose, Shuhei Mita, Shunpei Yokoo, Han Hsu, Hisayoshi Yurimoto   +6 more
doaj   +2 more sources

Evaluating the Effects of Thermal Processing on Nucleosynthetic Zinc Isotope Variations: Insights from Carbonaceous Chondrites Leachates

The Astrophysical Journal
Variations in the nucleosynthetic isotope compositions of meteorites have been suggested to result from variable destruction of some presolar grains through thermal processing.
Rayssa Martins, Elin M. Morton, Alessandro Bragagni, Helen M. Williams, Frank Wombacher, Mark Rehkämper   +5 more
doaj   +2 more sources

Possible Ribose Synthesis in Carbonaceous Planetesimals

Life, 2022
The origin of life might be sparked by the polymerization of the first RNA molecules in Darwinian ponds during wet-dry cycles. The key life-building block ribose was found in carbonaceous chondrites.
Klaus Paschek, Kai Kohler, Ben K. D. Pearce, Kevin Lange, Thomas K. Henning, Oliver Trapp, Ralph E. Pudritz, Dmitry A. Semenov   +7 more
doaj   +1 more source

Iron Isotope Constraints on the Structure of the Early Solar System

The Astrophysical Journal Letters, 2023
The recent advent of nontraditional isotopic systems has revealed that meteorites display a fundamental isotopic dichotomy between noncarbonaceous (NC) and carbonaceous (C) groups, which represent material from the inner and outer solar system ...
Yves Marrocchi, Maxime Piralla, François L. H. Tissot   +2 more
doaj   +1 more source

Clays and the Origin of Life: The Experiments

Life, 2022
There are three groups of scientists dominating the search for the origin of life: the organic chemists (the Soup), the molecular biologists (RNA world), and the inorganic chemists (metabolism and transient-state metal ions), all of which have ...
Jacob Teunis (Theo) Kloprogge, Hyman Hartman   +1 more
doaj   +1 more source

Origin of Isotopic Diversity among Carbonaceous Chondrites

The Astrophysical Journal Letters, 2023
Carbonaceous chondrites are some of the most primitive meteorites and derive from planetesimals that formed a few million years after the beginning of the solar system.
Jan L. Hellmann, Jonas M. Schneider, Elias Wölfer, Joanna Drążkowska, Christian A. Jansen, Timo Hopp, Christoph Burkhardt, Thorsten Kleine   +7 more
doaj   +1 more source

Meteorites and the RNA World: Synthesis of Nucleobases in Carbonaceous Planetesimals and the Role of Initial Volatile Content

The Astrophysical Journal, 2023
Prebiotic molecules, fundamental building blocks for the origin of life, have been found in carbonaceous chondrites. The exogenous delivery of these organic molecules onto the Hadean Earth could have sparked the polymerization of the first RNA molecules ...
Klaus Paschek, Dmitry A. Semenov, Ben K. D. Pearce, Kevin Lange, Thomas K. Henning, Ralph E. Pudritz   +5 more
doaj   +1 more source