Results 21 to 30 of about 40,246 (197)

Structure, composition, and location of organic matter in the enstatite chondrite Sahara 97096 (EH3) [PDF]

open access: yes, 2012
– The insoluble organic matter (IOM) of an unequilibrated enstatite chondrite Sahara (SAH) 97096 has been investigated using a battery of analytical techniques.
L. Piani   +10 more
semanticscholar   +1 more source

Study of the Extraterrestrial Materials at Antarctica, IV. : On the Yamato Meteorites

open access: yesAntarctic Record, 1974
Additional mineralogical and chemical studies of the Yamato meteorites are under way. The mode analysis and the optical properties in thin sections are examined under a microscope.
Makoto SHIMA   +2 more
doaj   +1 more source

New carbonaceous chondrite Northwest Africa 11781 (CM2)

open access: yesЛитосфера, 2019
Research subject. The article presents the results of a study of a new meteorite Northwest Africa 11781.Material and methods. The material for the study was a fragment of a meteorite weighing 15.56 g, from which 4 transparent polished sections with a ...
K. A. Dugushkina, S. V. Berzin
doaj   +1 more source

Study of the Extraterrestrial Materials at Antarctica, III : On the Yamato Meteorites

open access: yesAntarctic Record, 1973
Antarctica is thought to be the most suitable place for searching extraterrestrial materials. Since 1965, we have been studying microtektite and cosmic dust in Antarctica.
Masako SHIMA   +2 more
doaj   +1 more source

Equilibrium condensation from chondritic porous IDP enriched vapor: Implications for Mercury and enstatite chondrite origins [PDF]

open access: yes, 2011
The origin of Mercury's anomalous core and low FeO surface mineralogy are outstanding questions in planetary science. Mercury's composition may result from cosmochemical controls on the precursor solids that accreted to form Mercury.
D. Ebel, C. M. O.'D Alexander
semanticscholar   +1 more source

Combination of focused ion beam (FIB) and microtome by ultrathin slice preparation for transmission electron microscopy (TEM) observation

open access: yesEarth, Planets and Space, 2018
There are growing demands for integrated study of isotopes, trace elements and crystallography of micron-sized grains observed on polished sections or scattered on surface of sample holders.
Yuchen Xu   +4 more
doaj   +1 more source

Reclassification of four aubrites as enstatite chondrite impact melts: Potential geochemical analogs for Mercury

open access: yesMeteoritics and Planetary Science, 2019
We present petrologic and isotopic data on Northwest Africa (NWA) 4799, NWA 7809, NWA 7214, and NWA 11071 meteorites, which were previously classified as aubrites.
A. Udry   +10 more
semanticscholar   +1 more source

Petrogenesis of ungrouped enstatite meteorite Zakłodzie: Fabric, texture, and nanostructure analysis for identification of mechanisms responsible for chondrite–achondrite transition

open access: yesMeteoritics and Planetary Science, 2019
Zakłodzie is an enstatite meteorite of unknown petrogenesis. Chemically, it resembles enstatite chondrites, but displays an achondrite‐like texture.
A. Krzesińska, R. Wirth, M. Kusiak
semanticscholar   +1 more source

Identification of silicate and carbonaceous presolar grains by SIMS in the type-3 enstatite chondrite ALHA81189 [PDF]

open access: yes, 2008
An isotope ratio imaging technique using the HokuDai isotope microscope system has been applied to in-situ survey for presolar grains in the type-3 enstatite chondrite ALHA81189. Rastered and static ion beam were used for primary beam. Lateral resolution
S. Ebata, T. Fagan, H. Yurimoto
semanticscholar   +2 more sources

Identification of Silicate and Carbonaceous Presolar Grains in the type 3 Enstatite Chondrites [PDF]

open access: yes, 2008
We surveyed presolar grains in primitive enstatite chondrites by isotopography using the HokuDai isotope microscope system. The mineral identification has been conducted by X-ray analysis with scanning electron microscopy.
Ebata, Shingo, Yurimoto, Hisayoshi
core   +1 more source

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