Results 21 to 30 of about 45,144 (177)

The Dual Origin of the Terrestrial Atmosphere

, 2003
The origin of the terrestrial atmosphere is one of the most puzzling enigmas in the planetary sciences. It is suggested here that two sources contributed to its formation, fractionated nebular gases and accreted cometary volatiles.
Abe, Anders, Ballentine, Balsiger, Bar-Nun, Bar-Nun, Benz, Bockelée-Morvan, Burnard, Busemann, Caffee, Chen, Chyba, Chyba, Dauphas, Dauphas, Dauphas, Dauphas, Dauphas, Dauphas, Delsemme, Delsemme, Eberhardt, Holland, Honda, Honda, Hunten, Hunten, Ihaka, Iro, Jagoutz, Kerridge, Kimura, Kleine, Kunz, Laufer, Marty, Marty, Marty, Maréchal, Mathew, Mathew, Matsui, Matsumoto, Mazor, Meier, Meisel, Meisel, Morbidelli, Moreira, Moreira, Nicolas Dauphas, Notesco, Notesco, Owen, Owen, Owen, Owen, Ozima, Ozima, Ozima, Pepin, Pepin, Pepin, Pepin, Pepin, Pepin, Podosek, Porcelli, Porcelli, Press, Sagan, Sarda, Sasaki, Schoenberg, Shoemaker, Swindle, Swindle, Tolstikhin, Trieloff, Walker, Wieler, Wieler, Yamamoto, Yin, Yokochi, Zahnle, Zahnle, Zahnle, Zahnle, Zahnle, Zhang   +91 more
core   +1 more source

Annama H chondrite-Mineralogy, physical properties, cosmic ray exposure, and parent body history [PDF]

, 2017
The fall of the Annama meteorite occurred early morning (local time) on April 19, 2014 on the Kola Peninsula (Russia). Based on mineralogy and physical properties, Annama is a typical H chondrite. It has a high Ar-Ar age of 4.4 Ga.
Brusnitsyna, Evgeniia V., Busemann, Henner, Caffee, Marc. W., Chukin, Andrey V., Felner, Israel, Gritsevich, Maria, Grokhovsky, Victor I., Haloda, Jakub, Halodova, Patricie, Hopp, Jens, Ishchenko, Aleksey V., Karabanalov, Maksim S., Kohout, Tomas, Kruglikov, Nikolai A., Laubenstein, Matthias, Lyytinen, Esko, Maden, Colin, Mahajan, Ramakant R., Maksimova, Alevtina A., Meier, Matthias M. M., Moilanen, Jarmo, Moyano-Cambero, Carles E., Naik, Sekhar, Oshtrakh, Michael I., Petrova, Evgeniya V., Semionkin, Vladimir A., Trieloff, Mario, Trigo-Rodriguez, Josep M., Welten, Kees C., Yakovlev, Grigoriy A.   +29 more
core   +3 more sources

Discovery of non-radiogenic tungsten isotopic anomalies in the Allende CV3 chondrite

, 2009
cantly lower than those for other carbonaceous chondrites. Several possible explanations for the deficiency in the 184 W found in the Allende CV3 were explored.
K. Irisawa, Q. Yin, T. Hirata
semanticscholar   +1 more source

New attempts to understand nanodiamond stardust [PDF]

, 2011
We report on a concerted effort aimed at understanding the origin and history of the pre-solar nanodiamonds in meteorites including the astrophysical sources of the observed isotopic abundance signatures.
A. Besmehn, A. Wallner, Arndt, Arndt, Besmehn, Braatz, Dillmann, Heck, Hohenberg, Hoppe, Huss, Huss, K. Farouqi, K. Melber, K.-L. Kratz, Kutschera, Lewis, Lodders, Marhas, Nichols, O. Hallmann, Ott, Ott, Ott, P. Hoppe, Pearson, Priller, Schönbächler, Steier, U. Ott, Wallner, Wallner, Zinner   +32 more
core   +3 more sources

A Novel Soil Chronometer: Uranium Comminution Ages Measure Soil Production Rates in a Deep Granitic Weathering Profile

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Soil production, through bedrock weathering, regulates landscape evolution, biogeochemical cycles, and societal sustainability, yet quantifying soil production rates (SPRs) remains difficult due to limited tools. Here, we present a new framework for measuring SPRs based on uranium comminution ages and validate this approach at a deep granitic ...
Shenghui Ouyang, Le Li, Gaojun Li, Gen K. Li   +3 more
wiley   +1 more source

The effect of pressure on dihedral angle between liquid Fe‐S and orthopyroxene: Implication for percolative core formation in planetesimals and planetary embryos

Meteoritics &Planetary Science, Volume 60, Issue 12, Page 2811-2827, December 2025.
Abstract During precursor stages of planet formation, many planetesimals and planetary embryos are considered to have differentiated, forming an iron‐alloy core and silicate mantle. Percolation of liquid iron‐alloy in solid silicates is one of the major possible differentiation processes in these small bodies.
Takumi Miura, Hidenori Terasaki, Hyu Takaki, Kotaro Kobayashi, Geoffrey David Bromiley, Takashi Yoshino   +5 more
wiley   +1 more source

Sedimentary record of submarine gravity‐flow events in the southern Ryukyu forearc during the last 200 000 years: Archive of mega‐earthquakes and tsunamis

Sedimentology, Volume 72, Issue 7, Page 2323-2360, December 2025.
ABSTRACT Despite high convergence velocity, the southern Ryukyu subduction has relatively low and sparse instrumental seismicity, in contrast with the Yaeyama Islands, hit by huge tsunamis over the last few thousand years. This study explores the potential of deep marine sediments to record past large earthquakes and tsunamis.
Nathalie Babonneau, Gueorgui Ratzov, Charlotte Guerin, Mira Richa, Serge Lallemand, Michel Condomines, Patrick Bachelery, Delphine Bosch, Shu‐Kun Hsu, Chih‐Chieh Su, Ryuichi Shinjo, Andrew Lin, Maria‐Angela Bassetti, Marie Revel, Antonio Cattaneo, the EAGER Scientific Team, M Aizawa, G. Ballas, J.‐H. Chang, Y.‐P. Chang, T.‐T. Chen, Y.‐H. Chen, P. Das, J.‐P. Degeai, J. Déverchère, O. De Raco, N. Gosset, M. Herlédan, S.‐L. Ho, H.‐H. Hsu, Y.‐S. Huang, M. Lanson, C. Letourneau, H.‐S. Lin, L.‐F. Lin, L.‐K. Lin, M. Longo, M. Mérindol, B. Mercier de Lépinay, E. Miramontes, P. Morena, K. Nayak, D. Oregioni, L. Patry, R. K. Pillutla, V. Rigalleau, L. San Pedro, P.‐J. Su, F. Volage, K.‐Y. Wei, B. Whilhelm, N.‐T. Yu, P.‐S. Yu   +52 more
wiley   +1 more source

Drainage Pattern Changes in Southeastern Tibet Inferred from Eocene–Modern Sediment Provenance of the Yanyuan Basin

Basin Research, Volume 37, Issue 6, November/December 2025.
Deep gorges with abrupt river elbows and high‐elevation, low‐relief interfluves containing fluvial sedimentary rocks characterize southeastern Tibet. This transient landscape reflects Eocene to present drainage divide migrations and river captures, reshaping catchment boundaries through episodic exchanges of drainage area between neighboring basins ...
Xilin Sun, Maria Giuditta Fellin, Sean Douglas Willett, Klaudia F. Kuiper, Yuntao Tian, Zengjie Zhang, Rujun Guo, David Chew, Marcel Guillong, Foteini Drakou, Jan R. Wijbrans   +10 more
wiley   +1 more source

Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa [PDF]

, 2014
The knowledge of the production of extinct radioactivities like 92Nb and 146Sm by photodisintegration processes in ccSN and SNIa models is essential for interpreting abundances in meteoritic material and for Galactic Chemical Evolution (GCE).
Gallino, R., Hirschi, R., Nishimura, N., Rauscher, T., Travaglio, C.   +4 more
core   +2 more sources

Cosmic ray exposure and gas retention ages of the shocked angrite Northwest Africa 7203: Implications for a collisional history of angrites' parent body

Meteoritics &Planetary Science, Volume 60, Issue 11, Page 2560-2573, November 2025.
Abstract Angrites and eucrites are among the oldest basaltic rocks in the solar system. However, the shock histories of these meteorite groups differ markedly, as most angrites show little to no evidence of shock metamorphism. While some angrites exhibit weak wavy extinction in olivine, indicative of low‐level shock, only two—Northwest Africa (NWA ...
Atsushi Takenouchi, Hirochika Sumino, Hideyuki Hayashi, Takashi Mikouchi, Martin Bizzarro   +4 more
wiley   +1 more source