 | Dreibus, G., Palme, H., Spettel, B., Zipfel, J., Wänke, H. (1995) Sulfur and selenium in chondritic meteorites. Meteoritics, 30 (4) 439-445 doi:10.1111/j.1945-5100.1995.tb01150.x | Journal (article/letter/editorial) | | (:)Meteoritical Society, 1995. Printed in USA Sulfur and selenium in chondritic meteorites G. DREIBus, ...20; accepted in revised farm 1995 May 22) Abstract-We report here new analyses of Sand Se in carbonaceous...acapulcoites, 3 lodranites, and in silicate inclusions of the Landes lAB iron meteorite. To avoid problems from...of falls). The average ratio of all meteorite falls analysed in this study was 2500 ± 270. These data...system abundance of S of 4.62 x 105 (atoms/LO'' Si) is in good agreement with the solar photospheric abundance |  | Nguyen, Ann N., Berger, Eve L., Nakamura‐Messenger, Keiko, Messenger, Scott, Keller, Lindsay P. (2017) Coordinated mineralogical and isotopic analyses of a cosmic symplectite discovered in a comet 81P/Wild 2 sample. Meteoritics & Planetary Science, 52 (9) 2004-2016 doi:10.1111/maps.12905 | Journal (article/letter/editorial) | | isotopic analyses of a cosmic symplectite discovered in a comet 81P/Wild 2 sample Ann N. NGUYEN1,2,*, Eve...accepted 14 May 2017) Abstract–We have discovered in a Stardust mission terminal particle a unique mineralogical...(COS) have only been found in the primitive carbonaceous chondrite Acfer 094 and are believed to have formed...reservoir either inside the snow line, in the Wild 2 comet, or in a larger Kuiper Belt object. Close association...FeO-rich olivine, and albite) that likely originated in the solar nebula suggests the COS precursors also |  | 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 |  | 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) | | 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) | | 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) | | 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...wt%, n=4, ~15 vol %). Minor phases detected are troilite, chromite, and calcium-magnesium phosphates. New...analyzed in 11 replicates by laser fluorination) are different from other pyroxene pallasites in that they |  | | 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 |  | | 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...plagioclase (An45-54Or1-2), Fe-Ni metal, chromite and troilite. Tafassasset has a similar texture and mineral...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 |  | | 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 |  | | 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 |
|
