Results 91 to 100 of about 1,937 (173)
Compositional trends in chondrules from unequilibrated enstatite chondrite, Parsa [PDF]
, 1987 Multielemental analysis of chondrules from the unequilibrated E3 chondrite Parsa shows that the lithophile elements, both refractory and volatile, are enriched and siderophiles are depleted relative to C1 abundances.
Shukla, P. N., Bhandari, N.
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Elemental abundances in meteoritic chondrules [PDF]
High-precision instrumental neutron activation analysis has been used to determine Al, Na, Mn, Sc, Cr, Fe, Co, and Ni in a suite of more than 500 chondrules from 26 distinct meteorites.
Osborn, Thomas Ward, III
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Evaporation and recondensation of sodium in Semarkona Type II chondrules [PDF]
, 2012 We have investigated the Na distributions in Semarkona Type II chondrules by electron microprobe, analyzing olivine and melt inclusions in it, mesostasis and bulk chondrule, to see whether they indicate interactions with an ambient gas during chondrule ...
Hewins, Roger H. +2 more
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Geophysical Research Letters, 1979 A new mechanism for primordial melting of chondrules based upon heating by relativistic electrons accelerated by reconnecting magnetic field lines is discussed. This mechanism is free of the creation‐annihilation problem of collisions used for heating.
openaire +1 more source
No cosmic-ray precompaction exposure of chondrules in CR2.7 MIL 090657 [PDF]
, 2018 Cosmogenic nuclides are useful for reconstructing the cosmic‐ray precompaction exposure history of the chondritic components in the early solar system. Here, we present He and Ne isotope data for 22 chondrules and 4 matrix samples from Miller Range (MIL)
Leya, Ingo, Roth, Antoine S. G.
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The use of SEM/EDS method in mineralogical analysis of ordinary chondritic meteorite
Geologija, 2009 The aim of this study was to evaluate the potential of scanning electron microscopy coupled with energy dispersiveX-ray spectroscopy (SEM/EDS) for determination of mineral phases according to their stoichiometry and assessment of mineral composition of ...
Breda Mirtič, Urša Curk, Miloš Miler
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Geosciences, 2015 A comprehensive classification of primitive achondrites is difficult due to the high compositional and textural variability and the low number of samples available.
Vanni Moggi Cecchi, Stefano Caporali
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Petrological Studies on Chondrules in Yamato-74 Meteorites [PDF]
, 1979 P(論文)Crystallization of chondrule is investigated through the study of Yamato-74191,-74155,-74079,-74371,and -74647 meteorites. Bulk compositions of chondrules are calculated from modal analyses and mineral compositions, and are projected in the MgO ...
Kimura, Makoto +2 more
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On the origin of porphyritic chondrules [PDF]
, 1994 A computer program for the complex equilibria in a cooling nebular gas was used to explore a possible origin of porphyritic chondrules, the major class of chondrules in chondritic meteorites.
Unger, L. +3 more
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Trace elements in the silicate minerals of the Borodino Meteorite (Н5)
Записки Горного институтаMajor (EPMA) and trace (SIMS) element geochemistry in olivine, low-Са pyroxene and mesostasis from porphyritic and barred chondrules, as well as the pyroxene-olivine aggregate and matrix of equilibrated ordinary Borodino chondrite (Н5) is discussed. No
Kristina G. Sukhanova
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