Results 31 to 40 of about 3,558 (195)

Statistical tests of chondrule sorting [PDF]

Meteoritics & Planetary Science, 2010
Abstract–The variation in sizes of chondrules from one chondrite to the next is thought to be due to some sorting process in the early solar nebula. Hypotheses for the sorting process include chondrule sorting by mass and sorting by some aerodynamic mechanism; one such aerodynamic mechanism is the process of turbulent concentration (TC). We present the
Teitler, Seth A., Paque, Julie M., Cuzzi, Jeffrey N., Hogan, Robert C.   +3 more
openaire   +3 more sources

Chondrule Formation in Bow Shocks around Eccentric Planetary Embryos

, 2012
Recent isotopic studies of Martian meteorites by Dauphas & Pourmond (2011) have established that large (~ 3000 km radius) planetary embryos existed in the solar nebula at the same time that chondrules - millimeter-sized igneous inclusions found in ...
Athanassiadou, Themis, Boley, Aaron C., Desch, Steven J., Morris, Melissa A.   +3 more
core   +1 more source

Kivesvaara C2 chondrite: silicate petrography and chemical composition [PDF]

Bulletin of the Geological Society of Finland, 1983
Fragments of the Kivesvaara meteorite were said to have been found in Paltamo, northern Finland in 1968. The chemical and mineral composition and the textural features show that this meteorite is a rare C2 carbonaceous chondrite.
K.A. Kinnunen, R. Saikkonen
doaj   +1 more source

Formation of chondrules in radiative shock waves I. First results, spherical dust particles, stationary shocks [PDF]

, 2012
The formation of chondrules in the protoplanetary nebulae causes many questions concerning the formation process, the source of energy for melting the rims, and the composition of the origin material. The aim of this work is to explore the heating of the
Dorfi, E. A., Joham, H.
core   +1 more source

Size-selective concentration of chondrules and other small particles in protoplanetary nebula turbulence

, 2000
Size-selective concentration of particles in a weakly turbulent protoplanetary nebula may be responsible for the initial collection of chondrules and other constituents into primitive body precursors. This paper presents the main elements of this process
Barge P., Chhabra A. B., Dodd R. T., Eisenhour D., Goldman I., Hosogawa I., Hughes D. W., Kato S., Keubler K., H., Lynden-Bell D., MacPherson G. J., Mandelbrot B., Markievicz W. J., Maxey M. R., Meneveau C., Richard D., Rubin A., Shakura N. I., Squires K., Squires K., Sreenivasan K. R., Volk H. J., Wang L, Weidenschilling S. J.   +23 more
core   +1 more source

Spinel in CV chondrules: Investigating precursor legacy and chondrule thermal histories

Meteoritics & Planetary Science, 2022
AbstractIn carbonaceous chondrites, Mg‐spinel (MgAl2O4) grains are ubiquitous in refractory inclusions but rarely reported in chondrules, where they may correspond to minerals either (i) inherited from chondrule precursors or (ii) crystallized from chondrule melts. Here, we report high‐current quantitative electron microprobe measurements and secondary
Nicolas Schnuriger, Camille Cartier, Johan Villeneuve, Valentina Batanova, Maxence Regnault, Yves Marrocchi   +5 more
openaire   +2 more sources

Did a Complex Carbon Cycle Operate in the Inner Solar System?

Life, 2020
Solids in the interstellar medium consist of an intimate mixture of silicate and carbonaceous grains. Because 99% of silicates in meteorites were reprocessed at high temperatures in the inner regions of the Solar Nebula, we propose that similar levels of
Joseph A. Nuth, Frank T. Ferguson, Hugh G. M. Hill, Natasha M. Johnson   +3 more
doaj   +1 more source

Evolution of oxygen isotopic composition in the inner solar nebula

, 2005
Changes in the chemical and isotopic composition of the solar nebula with time are reflected in the properties of different constituents that are preserved in chondritic meteorites. CR carbonaceous chondrites are among the most primitive of all chondrite
Aleon J., Alexander N. Krot, Cassen P., Catanzaro E., Desch S. J., Edward R. D. Scott, Guy Libourel, Hisayoshi Yurimoto, Ian D. Hutcheon, Jeffrey N. Cuzzi, Jerome Aleon, Kevin D. McKeegan, Klerner S., Kobayashi S., Krot A. N., Krot A. N., Krot A. N., Krot A. N., Krot A. N., Krot A. N., Lee T., MacPherson G. J., Marc Chaussidon, Marhas K. K., Marhas K. K., McKeegan K. D., McKeegan K. D., Michael I. Petaev, Scott E. R. D., Weidenschilling S. J., Woolum D. S.   +30 more
core   +1 more source

Microspherules Formed by Lightning Strikes

Meteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

CI chondrite Oued Chebeika 002 links asteroids Bennu and Ryugu to common parent body

Meteoritics &Planetary Science, EarlyView.
Abstract CI chondrites are a compositionally primitive group of meteorites that have undergone extensive aqueous alteration, providing insights into the evolution of primitive planetesimals. Oued Chebeika 002 is the most pristine CI chondrite to date.
Megan Broussard, Katharina Lodders, Paul K. Carpenter, Piers Koefoed, Karen Ziegler, Kunihiko Nishiizumi, Marc W. Caffee, Laurence A. J. Garvie, Ryan C. Ogliore, Anthony J. Irving, Bradley L. Jolliff, Kun Wang   +11 more
wiley   +1 more source