 | Jacquet, Emmanuel, Paulhiac-Pison, Marine, Alard, Olivier, Kearsley, Anton T., Gounelle, Matthieu (2013) Trace element geochemistry of CR chondrite metal. Meteoritics & Planetary Science, 48 (10) 1981-1999 doi:10.1111/maps.12212 | Journal (article/letter/editorial) |
| approximated by the least-melted, fine-grained objects in CR chondrites. This also excludes recondensation...Ni-poorer, amoeboid margin grains, often included in the pyroxene-rich periphery common to type I chondrules...“quenching phase,” in which case dust accreted onto chondrules while they were molten. In the latter case...case, high dust concentrations in the chondrule-forming region (at least three orders of magnitude above... the metal fraction varies between 0 and 70 vol% in chondrites and is one classical petrographic discriminant |
 | | Journal (article/letter/editorial) |
| org/10.1016/j.gca.2020.05.026 GCA 11785 To appear in: Geochimica et Cosmochimica Acta Received Date:...copyediting, typesetting and review before it is published in its final form, but we are providing this version...the Department of Physics, Washington University in St. Louis, St. Louis, MO 63130, USA. Abstract We...organic matter (OM) in 14 xenolithic carbonaceous clasts (C-clasts) identified in the Kapoeta howardite...isotopic imaging data. The 14 Cclasts are ~50−200 μm in size and consisted of one CM-like and 13 CI-like |
 | | Journal (article/letter/editorial) |
| STUDY OF Fe2+-Mg2+ ORDER-DISORDER IN PYROXENE FROM THE CACHARI METEORITE Y. A. Abdu1, R. B. Scorzelli2,...Argentina. Introduction: The Cachari meteorite, found in 1916 in Argentina, is a monomictic eucrite that...indicates that the only Fe-containing mineral present in the Cachari eucrite is pyroxene [3]. The study of...sites M1 and M2 in pyroxenes is useful in tracing the thermal history of a rock. In unshocked and slowly...M1 and M2 sites in orthopyroxene from the Cachari eucrite by Mössbauer spectroscopy in the temperature |
 | | Journal (article/letter/editorial) |
| sub-nanometre scales. This review outlines the ways in which samples of Earth and planetary materials can...STEM work, and highlights the significant advances in site-specific preparation enabled by the focused...specimen interactions. However, recent improvements in technologies for preparing thin samples of rocks...diffraction, and X-ray and electron spectroscopy, hopefully in a manner that is accessible to the non-expert geoscientist...techniques with a geoscience emphasis can also be found in McLaren (1991) and Buseck (1992), and Putnis (1992) |
 | | Journal (article/letter/editorial) |
| group (PMG) and the Eagle Station grouplet (PES). In the meantime, additional pyroxene-bearing pallasites...10019 was purchased by Steve Arnold from Morocco in January 2015 and consisted of one 580 gram fusion...2Wo1.0±0.2, Fe/Mn=23±1, n=6, ~10 vol %), all set in a matrix of taenite (Fe=72.0±4.0, Ni=27.4±2.4, Co=0...analyzed in 11 replicates by laser fluorination) are different from other pyroxene pallasites in that they...significantly elevated in fayalite content relative to PMG and are similar to olivines in Springwater (PMG-an) |
 | | Journal (article/letter/editorial) |
| prior to its selection as a Rosetta flyby target in 2004, a ground-based observational campaign was undertaken...sets of spectra were collected over an ~3 h interval in order to obtain data on each hemisphere of the asteroid...spectral slope at longer wavelengths up through 0.92 µm. In addition, previous investigators have determined...the sulfide instead of Ca2+. In addition, oldhamite is present only in highly reduced mineral assemblages...a plausible similarity between this meteorite and the asteroid in terms of albedo and absorption features |
 | | Journal (article/letter/editorial) |
| Pyroxene is an important rock-forming mineral found in the Earth’s upper mantle and on the surfaces of inner...inferred by remote reflectance spectroscopy (mainly in the near-infrared (NIR) region), thus making the...phases [5]. This anomaly is similar to that observed in Mössbauer spectra of some Ca-rich clinopyroxenes...pyroxenes shows a residual electron density peak in the difference-Fourier synthesis, located at ~ 0...the existence of two different local configurations in the M2 cavity, a hedenbergite-like arrangement and |
 | | Journal (article/letter/editorial) |
| STUDY OF THE MECHANISMS OF FORMATION OF NANOSULFIDES IN COMET WILD 2 N. M. Abreu1, F. J. M. Rietmeijer2 and...FIELD, PATAGONIA, ARGENTINA: THE LARGEST CRATER FIELD IN THE WORLD? R. D. Acevedo, J. Rabassa, M. J. Orgeira...collected its freshly ejected dust, which carved tracks in ultra-low density, silica aerogel collection tiles...by which this occurred has remained unexplained. In this paper we experimentally explore how disequilibrium...Discussion: Samples were produced by vaporizing solid S in a furnace tube into which a H2, Fe-carbonyl, silane |
 | | Journal (article/letter/editorial) |
| classified into petrologic types 1 and 2 [1,2]. However, in recent years, CR samples experiencing thermal metamorphism...heterogeneity is observed even in a single PTS. It is noted that the size of Fe-Ni metal in one of the PTSs are...much larger (~2 mm) than that in the other (~0.8 mm, mostly 0.2 mm). In our Tafassasset PTSs, no relict...compositions of Tafassasset are mostly homogeneous in major elements: olivine (Fa26-28), high-Ca pyroxene...cooling histories. Al and Ti contents in low-Ca pyroxene are homogeneous in NWA 7317 (Al2O3: 0.6-0.9 wt%, TiO2: |
 | | Journal (article/letter/editorial) |
| MÖSSBAUER SPECTROSCOPY OF OLIVINES FROM THE D’ORBIGNY METEORITE Y. A. Abdu1, M. E. Varela2 and F. C. Hawthorne1... 5444 A PRELIMINARY STUDY OF MAGMATIC VOLATILES IN ANGRITES F. A. J. Abernethy1, A. Verchovsky1, I....Olivine is a major basaltic mineral in high-temperature volcanic rocks and in stony meteorites. The D’Orbigny...angrite contains large olivine crystals (up to 1 cm in size) that are present throughout the rock, mimicking...GOl; 856, 824 cm)1 for POl, reflecting variability in composition. Using the x (= j1-j2) – Mg# relation |
 | | Book |
| this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical...storage and retrieval system, without permission in writing from the publisher. Details on how to seek...This book and the individual contributions contained in it are protected under copyright by the Publisher...noted herein). Notices Knowledge and best practice in this field are constantly changing. As new research...and experience broaden our understanding, changes in research methods, professional practices, or medical |
 | | Book (edition) |
| Lecture Notes in Physics Founding Editors: W. Beiglböck, J. Ehlers, K. Hepp, H. Weidenmüller Editorial... The Lecture Notes in Physics The series Lecture Notes in Physics (LNP), founded in 1969, reports new...new developments in physics research and teaching – quickly and informally, but with a high quality and...communicate current knowledge in an accessible way. Books published in this series are conceived as bridging...considered for LNP. Volumes published in LNP are disseminated both in print and in electronic formats, the electronic |
