Results 31 to 40 of about 40,246 (197)

Partial melting of an enstatite chondrite at 1 GPa: Implications for early planetary differentiation [PDF]

, 2020
We present new time series partial melting experiments performed on a natural enstatite chondrite (EL6), aimed at investigating the textural and geochemical changes induced by silicate-metal equilibration during early planetary differentiation.
Ziberna, Luca, Myhill, Robert, Folco, Luigi, Masotta, Matteo   +3 more
core   +1 more source

New findings for the equilibrated enstatite chondrite Grein 002

, 2004
We report new petrographic and chemical data for the equilibrated EL chondrite Grein 002, including the occurrence of osbornite, metallic copper, abundant taenite, and abundant diopside. As inferred from low Si concentrations in kamacite, the presence of
Patzer, A., Hill, D. H., Boynton, W. V., Schultz, L., Tarkian, M., Schlüter, J.   +5 more
core   +2 more sources

Xenoliths in meteorites: Insights into the dynamics of material exchange between asteroids

Meteoritics &Planetary Science, EarlyView.
Abstract A minor fraction of meteorites contains xenoliths, that is, clasts that were formed on a different parent body than that of the host lithology. The occurrence of xenoliths is direct evidence for the exchange of material between asteroids, including exchanges between asteroids from the carbonaceous (CC) and non‐carbonaceous (NC) reservoirs ...
J. Gattacceca, B. Devouard, L. Bonal, Y. Marrocchi, A. Greshake, R. Tartèse, M. Gounelle, D. AuYang, C. Sonzogni, M. Hutson, A. Irving, C. Agee, T. Shisseh, A. Love, V. Vidal, D. Borschneck, S. A. Eckley, A. Morbidelli   +17 more
wiley   +1 more source

Nuclear track records in the Abee enstatite chondrite

, 1983
Nuclear track records in fourteen samples taken from different locations of a cut-slab of the Abee enstatite chondrite were studied to determine its pre-atmospheric mass and to delineate its cosmic ray exposure history.
Goswami, J. N.
core   +1 more source

Thermal history, collisional history, and structure of the CK‐chondrite parent body

Meteoritics &Planetary Science, EarlyView.
Abstract Major chondrite groups (H, L, LL, R, EH, EL, CK) with some members of petrologic type 5 and 6 also have some members of types 3 and 4; they do not have members of type 1 or 2. Their parent bodies had onion‐shell structures and were internally heated by the decay of 26Al.
Alan E. Rubin
wiley   +1 more source

Variably shock‐compacted chondrites: Deformation–thermal histories, large differences in mineral deformation response, and implications for lithification

Meteoritics &Planetary Science, EarlyView.
Abstract Eight different H, L, and LL chondrites with 11 lithologies were studied and show good evidence for progressive shock effects and compaction. In weakly shocked chondrites (Baszkόwka, Bjurböle, Saratov, NWA 7298 Lithology A and C), silicates were dominantly fractured, troilite and metal were more deformed than olivine and fluidized, and ...
Alex M. Ruzicka, Jon M. Friedrich, Richard C. Hugo, Robert J. Macke, Daniel Sheikh, Melinda Hutson   +5 more
wiley   +1 more source

Hyperspectral Micro-Imaging in the Visible-Infrared Range of Enstatite Chondrite: Preliminary Investigation on Thin Section of Sahara 97072 [PDF]

, 2016
This abstract describe preliminary interpretation of microimaging hyperspectral data collected on a thin section of the enstatite chondrite EH3 Sahara ...
DE ANGELIS, Simone, DE SANCTIS, MARIA CRISTINA, Manzari, P.   +2 more
core  

Thermal history of an amoeboid olivine aggregate in the early solar nebula

Meteoritics &Planetary Science, EarlyView.
Abstract Carbonaceous chondrites commonly contain amoeboid olivine aggregates (AOAs). Here, we investigated an AOA in the CR chondrite Y‐793261. This AOA contains an unstable assemblage of forsterite and quartz. We found a rare occurrence of enstatite and quantitatively discuss its formation process.
M. Kimura, N. Imae, M. Komatsu, A. Yamaguchi   +3 more
wiley   +1 more source

Particle Accretion in Microgravity. I. Particle Sizes and Bulk Densities

The Planetary Science Journal
The precise mechanisms related to the accretion of protoplanetesimals from dust in protoplanetary disks (PPDs) are poorly understood. In order to better understand the early stages of planet formation and the growth of millimeter–centimeter agglomerates,
Akbar D. Whizin, Daniel D. Durda, Constantine C. C. Tsang, Stanley G. Love   +3 more
doaj   +1 more source

Protoplanetary disk evolution inferred from oxygen isotopes in anhydrous interplanetary dust particles

Meteoritics &Planetary Science, EarlyView.
Abstract Eight anhydrous interplanetary dust particles (IDPs) were analyzed for their oxygen isotopic compositions and mineralogy. They show oxygen isotopic compositions from 16O‐rich to 16O‐poor, due to mixing of different reservoirs inherited from the protosolar molecular cloud and the early solar nebula.
Birgit Schulz, Christian Vollmer, Peter Hoppe, Jan Leitner, Lindsay P. Keller   +4 more
wiley   +1 more source