 | Bland, Philip A., Stadermann, Frank J., Floss, Christine, Rost, Detlef, Vicenzi, Edward P., Kearsley, Anton T., Benedix, Gretchen K. (2007) A cornucopia of presolar and early solar system materials at the micrometer size range in primitive chondrite matrix. Meteoritics & Planetary Science, 42 (7) 1417-1427 doi:10.1111/j.1945-5100.2007.tb00582.x | Journal (article/letter/editorial) | | solar system materials at the micrometer size range in primitive chondrite matrix Philip A. BLAND1, 2*,...and oxygen-isotopic compositions in a 50 × 50 μm area of Acfer 094 matrix. The results reveal the exceptional...contents, and a Cr-Fe alloy (in addition to forsterite, pyroxene, sulfide, ferrihydrite, and amorphous groundmass...isotopic compositions. Unlike the larger CAIs in Acfer 094, which are uniformly 16O-enriched, two of the... this grain has isotopically normal Li. Finally, in our 50 × 50 μm area, we positively identified a presolar |  | Bland, P.A., Sexton, A.S., Jull, A.J.T., Bevan, A.W.R., Berry, F.J., Thornley, D.M., Astin, T.R., Britt, D.T., Pillinger, C.T. (1998) Climate and rock weathering: a study of terrestrial age dated ordinary chondritic meteorites from hot desert regions. Geochimica et Cosmochimica Acta, 62 (18) 3169-3184 doi:10.1016/s0016-7037(98)00199-9 | Journal (article/letter/editorial) | | 1998 Copyright © 1998 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/98 $19.00...Arizona 85721, USA (Received May 1, 1997; accepted in revised form June 4, 1998) Abstract—Ordinary chondrites...subsequently weathered in a range of climatic regimes from the present day to . 44 ka BP. In addition, recently...(principally magnetite and maghemite). OC finds show a range in the percentage of total Fe existing as Fe31 from...meteorites). Our results indicate several features of meteorite weathering that may result from climatic or geomorphologic |  | Nakamura, T. M., Sugiura, N., Kimura, M., Miyazaki, A., Krot, A. N. (2007) Condensation and aggregation of solar corundum and corundum-hibonite grains. Meteoritics & Planetary Science, 42 (7) 1249-1265 doi:10.1111/j.1945-5100.2007.tb00572.x | Journal (article/letter/editorial) | | (1–11 μm in size) and 5 corundum-hibonite grains with corundum overgrown by hibonite (4–7 μm in size),...found in the matrix of the mineralogically pristine, ungrouped carbonaceous chondrite Acfer 094 by using...collisions of grains in the nebula, and critical velocity for sticking, indicates that, in contrast to the...hibonite-free corundum aggregates could not have formed in the slowly cooling nebular region with solar composition...either in a region that stayed above the condensation temperature of hibonite for a long time or in a chemically |  | | 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) |  | | 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 |  | | 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) | | 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 |
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