CATALOG of METEORITE SECTIONS This List Details the Meteorite Sections in the Collections of the Center for Meteorite Studies, Arizona State University
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Disequilibrium Melting and Melt Migration Driven by Impacts: Implications for Rapid Planetesimal Core Formation
Available online at www.sciencedirect.com Geochimica et Cosmochimica Acta 100 (2013) 41–59 www.elsevier.com/locate/gca Disequilibrium melting and melt migration driven by impacts: Implications for rapid planetesimal core formation Andrew G. Tomkins ⇑, Roberto F. Weinberg, Bruce F. Schaefer 1, Andrew Langendam School of Geosciences, P.O. Box 28E, Monash University, Melbourne, Victoria 3800, Australia Received 20 January 2012; accepted in revised form 24 September 2012; available online 12 October 2012 Abstract The e182W ages of magmatic iron meteorites are largely within error of the oldest solar system particles, apparently requir- ing a mechanism for segregation of metals to the cores of planetesimals within 1.5 million years of initial condensation. Cur- rently favoured models involve equilibrium melting and gravitational segregation in a static, quiescent environment, which requires very high early heat production in small bodies via decay of short-lived radionuclides. However, the rapid accretion needed to do this implies a violent early accretionary history, raising the question of whether attainment of equilibrium is a valid assumption. Since our use of the Hf–W isotopic system is predicated on achievement of chemical equilibrium during core formation, our understanding of the timing of this key early solar system process is dependent on our knowledge of the seg- regation mechanism. Here, we investigate impact-related textures and microstructures in chondritic meteorites, and show that impact-generated deformation promoted separation of liquid FeNi into enlarged sulfide-depleted accumulations, and that this happened under conditions of thermochemical disequilibrium. These observations imply that similar enlarged metal accumu- lations developed as the earliest planetesimals grew by rapid collisional accretion. -
Meteorologia
MINISTÉRIO DA DEFESA COMANDO DA AERONÁUTICA METEOROLOGIA ICA 105-1 DIVULGAÇÃO DE INFORMAÇÕES METEOROLÓGICAS 2006 MINISTÉRIO DA DEFESA COMANDO DA AERONÁUTICA DEPARTAMENTO DE CONTROLE DO ESPAÇO AÉREO METEOROLOGIA ICA 105-1 DIVULGAÇÃO DE INFORMAÇÕES METEOROLÓGICAS 2006 MINISTÉRIO DA DEFESA COMANDO DA AERONÁUTICA DEPARTAMENTO DE CONTROLE DO ESPAÇO AÉREO PORTARIA DECEA N° 15/SDOP, DE 25 DE JULHO DE 2006. Aprova a reedição da Instrução sobre Divulgação de Informações Meteorológicas. O CHEFE DO SUBDEPARTAMENTO DE OPERAÇÕES DO DEPARTAMENTO DE CONTROLE DO ESPAÇO AÉREO, no uso das atribuições que lhe confere o Artigo 1°, inciso IV, da Portaria DECEA n°136-T/DGCEA, de 28 de novembro de 2005, RESOLVE: Art. 1o Aprovar a reedição da ICA 105-1 “Divulgação de Informações Meteorológicas”, que com esta baixa. Art. 2o Esta Instrução entra em vigor em 1º de setembro de 2006. Art. 3o Revoga-se a Portaria DECEA nº 131/SDOP, de 1º de julho de 2003, publicada no Boletim Interno do DECEA nº 124, de 08 de julho de 2003. (a) Brig Ar RICARDO DA SILVA SERVAN Chefe do Subdepartamento de Operações do DECEA (Publicada no BCA nº 146, de 07 de agosto de 2006) MINISTÉRIO DA DEFESA COMANDO DA AERONÁUTICA DEPARTAMENTO DE CONTROLE DO ESPAÇO AÉREO PORTARIA DECEA N° 33 /SDOP, DE 13 DE SETEMBRO DE 2007. Aprova a edição da emenda à Instrução sobre Divulgação de Informações Meteorológicas. O CHEFE DO SUBDEPARTAMENTO DE OPERAÇÕES DO DEPARTAMENTO DE CONTROLE DO ESPAÇO AÉREO, no uso das atribuições que lhe confere o Artigo 1°, alínea g, da Portaria DECEA n°34-T/DGCEA, de 15 de março de 2007, RESOLVE: Art. -
Lost Lake by Robert Verish
Meteorite-Times Magazine Contents by Editor Like Sign Up to see what your friends like. Featured Monthly Articles Accretion Desk by Martin Horejsi Jim’s Fragments by Jim Tobin Meteorite Market Trends by Michael Blood Bob’s Findings by Robert Verish IMCA Insights by The IMCA Team Micro Visions by John Kashuba Galactic Lore by Mike Gilmer Meteorite Calendar by Anne Black Meteorite of the Month by Michael Johnson Tektite of the Month by Editor Terms Of Use Materials contained in and linked to from this website do not necessarily reflect the views or opinions of The Meteorite Exchange, Inc., nor those of any person connected therewith. In no event shall The Meteorite Exchange, Inc. be responsible for, nor liable for, exposure to any such material in any form by any person or persons, whether written, graphic, audio or otherwise, presented on this or by any other website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. does not endorse, edit nor hold any copyright interest in any material found on any website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. shall not be held liable for any misinformation by any author, dealer and or seller. In no event will The Meteorite Exchange, Inc. be liable for any damages, including any loss of profits, lost savings, or any other commercial damage, including but not limited to special, consequential, or other damages arising out of this service. © Copyright 2002–2010 The Meteorite Exchange, Inc. All rights reserved. No reproduction of copyrighted material is allowed by any means without prior written permission of the copyright owner. -
Bez Tytu³u-2
BIULETYN MI£ONIKÓW METEORYTÓW METEORYT Nr 1 (25) Marzec 1998 W numerze: Jawor, Baszkówka, Mt Tazerzait, ¯elazo Pallasa Meteoryt Sikhote-Alin (105 g) bêd¹cy w³asnoci¹ miasta Lidzbarka Warmiñskiego. METEORYT 1/98 1 Od redaktora: Meteoryt biuletyn dla mi³o- ników meteorytów wydawany Wydarzeniem numeru jest rozwi¹zanie zagadki meteorytu przez Olsztyñskie Planetarium Jawor. Cudzys³ów podpowiada ju¿, ¿e wynik jest negatywny. Wro- i Obserwatorium Astronomicz- c³awscy naukowcy potrafili jednak dociec, czym jest kawa³ek ska³y ne, Muzeum Miko³aja Koper- le¿¹cy w muzeum w Jaworze z etykietk¹ meteoryt? i sk¹d do nika we Fromborku i Pallasite muzeum trafi³. Meteoryt czuje siê zaszczycony, ¿e to z jego ³amów Press wydawcê kwartalnika mo¿na siê o tym po raz pierwszy dowiedzieæ. Pe³ne opracowanie Meteorite! z którego pochodzi uka¿e siê w jednym z bardziej fachowych czasopism. wiêksza czêæ publikowanych Z nowym rokiem i z 25 numerem Meteoryt znów zmienia materia³ów. wygl¹d, co tradycyjnie jest zas³ug¹ Jacka Dr¹¿kowskiego. Z przy- Redaguje Andrzej S. Pilski jemnoci¹ odnotowujê te¿ powrót Micha³a Kosmulskiego do t³uma- czenia artyku³ów, oraz do³¹czenie siê Marka Muæka do grona t³uma- Sk³ad: Jacek Dr¹¿kowski czy i wspó³pracowników. Ronie te¿ grono czytelników, czyli nowy Druk: Jan, Lidzbark Warm. rok dobrze siê zapowiada. Adres redakcji: Dobrze zapowiada siê te¿ pozyskiwanie meteorytów dla kolekcjo- skr. poczt. 6, nerów, ale idzie to bardzo powoli. W kontaktach z zagranicznymi 14-530 Frombork, dealerami wystêpuje zjawisko znane naszym kolekcjonerom z kontak- tel. 0-55-243-7392. tów z ni¿ej podpisanym: wysy³a siê zamówienie i.. -
The Mineralogical Magazine Journal
THE MINERALOGICAL MAGAZINE AND JOURNAL OF THE MINERALOGICAL SOCIETY. 1~o. 40. OCTOBER 1889. Vol. VIII. On the Meteorites which have been found iu the Desert of Atacama and its neighbourhood. By L. FLETCHER, M.A., F.R.S., Keeper of Minerals in the British Museum. (With a Map of the District, Plate X.) [Read March 12th and May 7th, ]889.J 1. THE immediate object of the present paper is to place on record J- the history and characters of several Atacama meteorites of which no description has yet been published; but incidentally it is con- venient at the same time to consider the relationship of these masses to others from the same region, which either have been already described, or at least are stated to be preserved in one or more of the known Meteo. rite-Collections. 2. The term " Desert of Atacama " is generally applied to that part of western South America which lies between the towns of Copiapo and Cobija, about 330 miles distant from each other, and which extends island as far as the Indian hamlet of Antofagasta, about 180 miles from 224 L. FLETCHER ON THE METEORITES OF ATACAMA. the coast. The Atacama meteorites preserved in the Collections have been found at several places widely separated throughout the Desert. 3. A critical examination of the descriptive literature, and a compari- son of the manuscript and printed meteorite-lists, which have been placed at my service, lead to the conclusion that all the meteoritic frag- ments from Atacama now preserved in the known Collections belong to one or other of at most thirteen meteorites, which, for reasons given below, are referred to in this paper under the following names :-- 1. -
The Weston Meteorite (1807) – Impact Sites in Fairfield County, Connecticut
Lunar and Planetary Science XXXIX (2008) 2163.pdf THE WESTON METEORITE (1807) – IMPACT SITES IN FAIRFIELD COUNTY, CONNECTICUT. D. T. King, Jr.1 and L. W. Petruny2, 1Geology Office, Auburn University, Auburn, AL 36849 [[email protected]], 2Astra-Terra Research, Auburn, AL 36831-3323 [[email protected]]. Introduction: Ernst Chladni’s 1794 book laying within the town of Weston as constituted in 1807, out the arguments that meteorites came from outer hence the name). This primary site is located about space, not volcanoes or storm clouds, marks the theo- 500 m north of a road intersection at the historic 1715 retical origin of the modern science of meteoritics. Burton House. The largest fragment (~ 16 kg) was Criticisms of Chladni’s assertions began to fall away excavated from a shallow (~ 60 cm) pit at this site. At after the witnessed and well-documented meteoritic that time, the property owner was William Prince [3]. falls at Wold Cottage, Yorkshire, England (1795), and This area is today in a heavily wooded, upscale hous- l’Aigle, Normandy, France (1803). On December 14, ing subdivision with a vigilant neighborhood watch. 1807, a widely witnessed meteorite fall over Weston, Fairfield County, Connecticut, brought the new sci- ence of meteoritics to the United States. Recovered, documented, and chemically analyzed by Yale Univer- sity professors Benjamin Silliman and James Kingsley, the Weston meteorite became the first such scientifi- cally verified meteorite fall in the New World. Frag- ments collected by Silliman and Kingsley were the first catalogued objects in the Yale meteorite collec- tion, the oldest such collection in the United States. -
Calcium Isotopes in Natural and Experimental Carbonated Silicate Melts
Western University Scholarship@Western Electronic Thesis and Dissertation Repository 2-27-2018 2:30 PM Calcium Isotopes in Natural and Experimental Carbonated Silicate Melts Matthew Maloney The University of Western Ontario Supervisor Bouvier, Audrey The University of Western Ontario Co-Supervisor Withers, Tony The University of Western Ontario Graduate Program in Geology A thesis submitted in partial fulfillment of the equirr ements for the degree in Master of Science © Matthew Maloney 2018 Follow this and additional works at: https://ir.lib.uwo.ca/etd Part of the Geochemistry Commons Recommended Citation Maloney, Matthew, "Calcium Isotopes in Natural and Experimental Carbonated Silicate Melts" (2018). Electronic Thesis and Dissertation Repository. 5256. https://ir.lib.uwo.ca/etd/5256 This Dissertation/Thesis is brought to you for free and open access by Scholarship@Western. It has been accepted for inclusion in Electronic Thesis and Dissertation Repository by an authorized administrator of Scholarship@Western. For more information, please contact [email protected]. Abstract The calcium stable isotopic compositions of mantle-sourced rocks and minerals were investigated to better understand the carbon cycle in the Earth’s mantle. Bulk carbonatites and kimberlites were analyzed to identify a geochemical signature of carbonatite magmatism, while inter-mineral fractionation was measured in co-existing Ca-bearing carbonate and silicate minerals. Bulk samples show a range of composition deviating from the bulk silicate Earth δ44/40Ca composition indicating signatures of magmatic processes or marine carbonate addition 44/40 to source materials. Δ Cacarbonate-silicate values range from -0.55‰ to +1.82‰ and positively correlate with Ca/Mg ratios in pyroxenes. -
The Thermal Conductivity of Meteorites: New Measurements and Analysis
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier’s archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright Author's personal copy Icarus 208 (2010) 449–454 Contents lists available at ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus The thermal conductivity of meteorites: New measurements and analysis C.P. Opeil a, G.J. Consolmagno b,*, D.T. Britt c a Department of Physics, Boston College, Chestnut Hill, MA 02467-3804, USA b Specola Vaticana, V-00120, Vatican City State c Department of Physics, University of Central Florida, Orlando, FL 32816-2385, USA article info abstract Article history: We have measured the thermal conductivity at low temperatures (5–300 K) of six meteorites represent- Received 6 October 2009 ing a range of compositions, including the ordinary chondrites Cronstad (H5) and Lumpkin (L6), the Revised 21 January 2010 enstatite chondrite Abee (E4), the carbonaceous chondrites NWA 5515 (CK4 find) and Cold Bokkeveld Accepted 23 January 2010 (CM2), and the iron meteorite Campo del Cielo (IAB find). All measurements were made using a Quantum Available online 1 February 2010 Design Physical Properties Measurement System, Thermal Transport Option (TTO) on samples cut into regular parallelepipeds of 2–6 mm dimension. -
ELEMENTAL ABUNDANCES in the SILICATE PHASE of PALLASITIC METEORITES Redacted for Privacy Abstract Approved: Roman A
AN ABSTRACT OF THE THESIS OF THURMAN DALE COOPER for theMASTER OF SCIENCE (Name) (Degree) in CHEMISTRY presented on June 1, 1973 (Major) (Date) Title: ELEMENTAL ABUNDANCES IN THE SILICATE PHASE OF PALLASITIC METEORITES Redacted for privacy Abstract approved: Roman A. Schmitt The silicate phases of 11 pallasites were analyzed instrumen- tally to determine the concentrations of some major, minor, and trace elements.The silicate phases were found to contain about 98% olivine with 1 to 2% accessory minerals such as lawrencite, schreibersite, troilite, chromite, and farringtonite present.The trace element concentrations, except Sc and Mn, were found to be extremely low and were found primarily in the accessory phases rather than in the pure olivine.An unusual bimodal Mn distribution was noted in the pallasites, and Eagle Station had a chondritic nor- malized REE pattern enrichedin the heavy REE. The silicate phases of pallasites and mesosiderites were shown to be sufficiently diverse in origin such that separate classifications are entirely justified. APPROVED: Redacted for privacy Professor of Chemistry in charge of major Redacted for privacy Chairman of Department of Chemistry Redacted for privacy Dean of Graduate School Date thesis is presented June 1,1973 Typed by Opal Grossnicklaus for Thurman Dale Cooper Elemental Abundances in the Silicate Phase of Pallasitic Meteorites by Thurman Dale Cooper A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the degree of Master of Science June 1974 ACKNOWLEDGMENTS The author wishes to express his gratitude to Prof. Roman A. Schmitt for his guidance, suggestions, discussions, and thoughtful- ness which have served as an inspiration. -
N Arieuican%Mllsellm
n ARieuican%Mllsellm PUBLISHED BY THE AMERICAN MUSEUM OF NATURAL HISTORY CENTRAL PARK WEST AT 79TH STREET, NEW YORK 24, N.Y. NUMBER 2I63 DECEMBER I9, I963 The Pallasites BY BRIAN MASON' INTRODUCTION The pallasites are a comparatively rare type of meteorite, but are remarkable in several respects. Historically, it was a pallasite for which an extraterrestrial origin was first postulated because of its unique compositional and structural features. The Krasnoyarsk pallasite was discovered in 1749 about 150 miles south of Krasnoyarsk, and seen by P. S. Pallas in 1772, who recognized these unique features and arranged for its removal to the Academy of Sciences in St. Petersburg. Chladni (1794) examined it and concluded it must have come from beyond the earth, at a time when the scientific community did not accept the reality of stones falling from the sky. Compositionally, the combination of olivine and nickel-iron in subequal amounts clearly distinguishes the pallasites from all other groups of meteorites, and the remarkable juxtaposition of a comparatively light silicate mineral and heavy metal poses a nice problem of origin. Several theories of the internal structure of the earth have postulated the presence of a pallasitic layer to account for the geophysical data. No apology is therefore required for an attempt to provide a comprehensive account of this remarkable group of meteorites. Some 40 pallasites are known, of which only two, Marjalahti and Zaisho, were seen to fall (table 1). Of these, some may be portions of a single meteorite. It has been suggested that the pallasite found in Indian mounds at Anderson, Ohio, may be fragments of the Brenham meteorite, I Chairman, Department of Mineralogy, the American Museum of Natural History. -
Meteorite Collections: Sample List
Meteorite Collections: Sample List Institute of Meteoritics Department of Earth and Planetary Sciences University of New Mexico October 01, 2021 Institute of Meteoritics Meteorite Collection The IOM meteorite collection includes samples from approximately 600 different meteorites, representative of most meteorite types. The last printed copy of the collection's Catalog was published in 1990. We will no longer publish a printed catalog, but instead have produced this web-based Online Catalog, which presents the current catalog in searchable and downloadable forms. The database will be updated periodically. The date on the front page of this version of the catalog is the date that it was downloaded from the worldwide web. The catalog website is: Although we have made every effort to avoid inaccuracies, the database may still contain errors. Please contact the collection's Curator, Dr. Rhian Jones, ([email protected]) if you have any questions or comments. Cover photos: Top left: Thin section photomicrograph of the martian shergottite, Zagami (crossed nicols). Brightly colored crystals are pyroxene; black material is maskelynite (a form of plagioclase feldspar that has been rendered amorphous by high shock pressures). Photo is 1.5 mm across. (Photo by R. Jones.) Top right: The Pasamonte, New Mexico, eucrite (basalt). This individual stone is covered with shiny black fusion crust that formed as the stone fell through the earth's atmosphere. Photo is 8 cm across. (Photo by K. Nicols.) Bottom left: The Dora, New Mexico, pallasite. Orange crystals of olivine are set in a matrix of iron, nickel metal. Photo is 10 cm across. (Photo by K. -
Trace Element Chemistry of Cumulus Ridge 04071 Pallasite with Implications for Main Group Pallasites
Trace element chemistry of Cumulus Ridge 04071 pallasite with implications for main group pallasites Item Type Article; text Authors Danielson, L. R.; Righter, K.; Humayun, M. Citation Danielson, L. R., Righter, K., & Humayun, M. (2009). Trace element chemistry of Cumulus Ridge 04071 pallasite with implications for main group pallasites. Meteoritics & Planetary Science, 44(7), 1019-1032. DOI 10.1111/j.1945-5100.2009.tb00785.x Publisher The Meteoritical Society Journal Meteoritics & Planetary Science Rights Copyright © The Meteoritical Society Download date 23/09/2021 14:17:54 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/656592 Meteoritics & Planetary Science 44, Nr 7, 1019–1032 (2009) Abstract available online at http://meteoritics.org Trace element chemistry of Cumulus Ridge 04071 pallasite with implications for main group pallasites Lisa R. DANIELSON1*, Kevin RIGHTER2, and Munir HUMAYUN3 1Mailcode JE23, NASA Johnson Space Center, 2101 NASA Parkway, Houston, Texas 77058, USA 2Mailcode KT, NASA Johnson Space Center, 2101 NASA Parkway, Houston, Texas 77058, USA 3National High Magnetic Field Laboratory and Department of Geological Sciences, Florida State University, Tallahassee, Florida 32310, USA *Corresponding author. E-mail: [email protected] (Received 06 November 2008; revision accepted 11 May 2009) Abstract–Pallasites have long been thought to represent samples from the metallic core–silicate mantle boundary of a small asteroid-sized body, with as many as ten different parent bodies recognized recently. This report focuses on the description, classification, and petrogenetic history of pallasite Cumulus Ridge (CMS) 04071 using electron microscopy and laser ablation ICP-MS.