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March 21–25, 2016
FORTY-SEVENTH LUNAR AND PLANETARY SCIENCE CONFERENCE PROGRAM OF TECHNICAL SESSIONS MARCH 21–25, 2016 The Woodlands Waterway Marriott Hotel and Convention Center The Woodlands, Texas INSTITUTIONAL SUPPORT Universities Space Research Association Lunar and Planetary Institute National Aeronautics and Space Administration CONFERENCE CO-CHAIRS Stephen Mackwell, Lunar and Planetary Institute Eileen Stansbery, NASA Johnson Space Center PROGRAM COMMITTEE CHAIRS David Draper, NASA Johnson Space Center Walter Kiefer, Lunar and Planetary Institute PROGRAM COMMITTEE P. Doug Archer, NASA Johnson Space Center Nicolas LeCorvec, Lunar and Planetary Institute Katherine Bermingham, University of Maryland Yo Matsubara, Smithsonian Institute Janice Bishop, SETI and NASA Ames Research Center Francis McCubbin, NASA Johnson Space Center Jeremy Boyce, University of California, Los Angeles Andrew Needham, Carnegie Institution of Washington Lisa Danielson, NASA Johnson Space Center Lan-Anh Nguyen, NASA Johnson Space Center Deepak Dhingra, University of Idaho Paul Niles, NASA Johnson Space Center Stephen Elardo, Carnegie Institution of Washington Dorothy Oehler, NASA Johnson Space Center Marc Fries, NASA Johnson Space Center D. Alex Patthoff, Jet Propulsion Laboratory Cyrena Goodrich, Lunar and Planetary Institute Elizabeth Rampe, Aerodyne Industries, Jacobs JETS at John Gruener, NASA Johnson Space Center NASA Johnson Space Center Justin Hagerty, U.S. Geological Survey Carol Raymond, Jet Propulsion Laboratory Lindsay Hays, Jet Propulsion Laboratory Paul Schenk, -
Aluminium-Mg Systematics of Winonaites and Differentiation of the Iab-Winonaite Parent Body
77th Annual Meteoritical Society Meeting (2014) 5155.pdf ALUMINIUM-MG SYSTEMATICS OF WINONAITES AND DIFFERENTIATION OF THE IAB-WINONAITE PARENT BODY. Y. Hidaka1, V. Debaille1 and G. Hublet1. 1Laboratoire G-Time, Université Libre de Bruxelles, Brussels, Belgium. Introduction: Primitive achondrites such as winonaites are important materials to investigate the early differentiation processes of asteroids. Winonaites are considered to originate from the same parent body than IAB non-magmatic iron meteorites [1]. Short-lived radionuclide chronometers are useful to understand the first few million years of the solar system history. The Al-Mg system is one of the most established short- lived systematics that provides a very good time resolution. Previous Hf-W isotopic studies have revealed that IAB- winonaite parent body had accreted ~1 Ma after CAI formation [2] and its magmatic activity ceased ~4 Ma later [3]. However, there is no other chronological data of winonaites from other short-lived radionuclide systems, in particular from fully lithophile systematics, as W is siderophile. Therefore, we consider here additional Al-Mg chronological data of winonaites to investigate the early evolutionary history of the silicate portion of their parent body. Results and Discussion: We have investigated two winonaite meteorites NWA 725 and Y-8005, with a present focus on the first one. NWA 725 is officially classified as an acapulcoite, but oxygen isotopic data of this meteorite indicated that NWA 725 and paired meteorites are actually winonaites [4, 5]. NWA 725 has been reported as chondrule-bearing, the least metamorphosed primitive achondrite [6]. The evolutionary models of IAB-winonaite parent body [1, 2] indicated that this parent body should preserve intact, chondritic areas during partial melting and silicate-metal segregation processes. -
'San Juan', a New Mass of the Campo Del Cielo Meteorite Shower
‘San Juan’, a new mass of the Campo del Cielo meteorite shower Marcela Eliana SAAVEDRA1, María Eugenia VARELA1, Andrew J. CAMPBELL 2 and Dan TOPA 3 1Instituto de Ciencias Astronómicas de la Tierra y del Espacio (ICATE)-CONICET, San Juan, Argentina. 2Deptartment of the Geophysical Sciences, University of Chicago, , Chicago, USA. 3Central Research Laboratories, Natural History Museum, , Vienna, Austria. Email: [email protected] Editor: Diego A. Kietzmann Recibido: 19 de marzo de 2021 Aceptado: 15 de junio de 2021 Disponible online: 15 de junio de 2021 ABSTRACT Petrographic and chemical (major, minor and trace element) studies of silicate inclusions and metal from the San Juan A and B samples revealed that they are new masses belonging to the Campo del Cielo IAB iron meteorite shower. These masses must have being transported from the large strewn field in the Chaco and Santiago del Estero Provinces to the surroundings of San Juan city, where they have being recover in the year 2000. The sizes of the two masses of San Juan, collected 770 km SW from Santiago del Estero, is in agreement with the previously suggested anthropic hypothesis for the transport of Campo del Cielo. Keywords: IAB iron meteorites, Campo del Cielo meteorite, San Juan meteorite. RESUMEN San Juan, una nueva masa de la lluvia de meteoritos de Campo del Cielo Estudios petrográficos y químicos (elementos mayores, menores y trazas) de inclusiones de silicatos y de metal de las muestras A y B de San Juan, reveló que son nuevas masas que pertenecen a la lluvia de meteoritos de Campo del Cielo. -
A New Primitive Achondrite from Northwest Africa
A New Primitive Achondrite from Northwest Africa Kseniya K. Androsova* University of Calgary, Calgary, AB, Canada [email protected] and Alan R. Hildebrand University of Calgary, Calgary, AB, Canada Summary The winonaite and acapulcoite/lodranite meteorites constitute small groups of primitive achondrites that have experienced thermal metamorphism sometimes accompanied by varying degrees of partial melting. Petrographic and elemental abundance studies [optical microscope observations and electron microprobe analysis] have been conducted on several meteorites recovered in Northwest Africa (NWA). One meteorite has fine-grained, granulitic texture, abundant, evenly distributed metal and troilite grains, and highly reduced mineral compositions [Olivine (Fa6.0±0.4), low-Ca pyroxene (Fs7.5±0.4, Wo1.3±0.2), high-Ca pyroxene (Fs3.2±0.2, Wo45.8±0.7)]. Based on these criteria it appears that the data are consistent with the sample being a winonaite. The overall textural resemblance of this meteorite to NWA 1463 and /or NWA 725 (somewhat anomalous) winonaites (both having multiple relict chondrules) may suggest that this meteorite is paired with one or both. Although, until its oxygen isotope composition is obtained the classification of this meteorite as a winonaite (vs. as an acapulcoite) remains uncertain, its primitive achondritic nature is quite evident. Introduction The winonaite meteorites represent a class of rare primitive achondrites (together with the acapulcoite/lodranite association) that have sometimes undergone partial melting but generally have chondritic mineralogy and composition. Winonaites can be characterized by fine- to medium-grained, mostly granulitic textures, highly reduced mineral compositions, and unique oxygen isotope signatures (Benedix et al., 1998). Although most of the winonaites lack chondrules, several have been reported to have regions containing relict chondrules. -
Ensisheim 2001 Ensisheim 2001
BIULETYN MI£ONIKÓW METEORYTÓW METEORYTMETEORYT Nr 3 (39) Wrzesieñ 2001 Ensisheim 2001 2/2001 METEORYT str. 1 Od redaktora: Meteoryt (ISSN 1642-588X) biuletyn dla mi³oników me- Pytanie, dlaczego jedne okazy Gibeona maj¹ wyraziste figury teorytów wydawany przez Widmanstättena, a inne nie, drêczy³o mnie od dawna, szczególnie Olsztyñskie Planetarium i Ob- gdy sprowadza³em okaz z nadziej¹ na uzyskanie efektownych figur serwatorium Astronomiczne, na przekrojach, a okazywa³o siê, ¿e prawie nic nie widaæ. Dlatego Muzeum Miko³aja Kopernika z ogromnym zainteresowaniem przeczyta³em artyku³ Dietricha we Fromborku i Pallasite Press i Königa i polecam go ka¿demu kolekcjonerowi. Gibeona znaj¹ wydawcê kwartalnika Mete- przecie¿ wszyscy, nieprawda¿? orite! z którego pochodzi wiêk- sza czêæ publikowanych mate- Historia poszukiwañ meteorytu Tagish Lake ci¹gnie siê jak ria³ów. brazylijski serial, ale poniewa¿ zacz¹³em j¹ t³umaczyæ, wiêc chcê skoñczyæ. Sk¹d mog³em przypuszczaæ, ¿e zrobi¹ z tego taki tasie- Redaguje Andrzej S. Pilski miec? Na szczêcie w nastêpnym numerze ma byæ koniec. Sk³ad: Jacek Dr¹¿kowski Nasi kolekcjonerzy meteorytów zaczêli pojawiaæ siê na euro- Druk: Jan, Lidzbark Warm. pejskich targach meteorytowych, a dosz³y mnie wieci, ¿e na Adres redakcji: tegorocznych targach w Gifhorn bêdzie tak¿e polskie stoisko. skr. poczt. 6 Tymczasem zapraszam na relacjê z targów w Ensisheim, gdzie 14-530 Frombork warto siê wybraæ, by zobaczyæ najstarszy europejski meteoryt, tel. 0-55-243-7392 którego spadek obserwowano. Tym, którym za daleko na zagra- e-mail: [email protected] niczne targi, proponujê spotkania na gie³dach w £odzi i Gliwi- Biuletyn wydawany jest kwartal- cach. -
Bartoschewitz - Catalogue of Meteorites
BARTOSCHEWITZ - CATALOGUE OF METEORITES *FALL TOTAL BC- BC - NAME COUNTRY FIND WEIGHT TYPE No. SPECIMEN WEIGHT (kg) (gms) 1.1 CHONDRITES - ORDINARY OLIVINE BRONZITE CHONDRITES ACFER 005 Algeria March 1989 0,115 H 3.9/4 613.1 cut endpiece 32,70 ACFER 006 Algeria March 1989 0,561 H 3.9/4 614.1 slice 1,30 ACFER 011 Algeria 1989 3,8 H 5 399.1 cut fragm. 3,00 ACFER 020 Algeria 1989 0,708 H 5 401.1 cut fragm. 2,50 ACFER 028 Algeria 1989 3,13 H 3.8 844.1 part slice 1,70 ACFER 050 Algeria 1989 1,394 H 5-6 443.1 complete slice 105,00 ACFER 084 Algeria Apr. 16, 1990 6,3 H 5 618.1 cut corner piece 12,60 ACFER 089 Algeria 1990 0,682 H 5 437.1 complete slice 62,00 ACFER 098 Algeria 1990 5,5 H 5 615.1 cut fragment 29,20 ACFER 222 Algeria 1991 0,334 H 5-6 536.1 cut fragm. with crust 2,50 ACFER 284 Algeria 1991 0,12 H 5 474.1 slice 11,00 ACHILLES USA, Kansas 1924 recogn. 1950 16 H 5 314.1 slice 3,40 ACME USA, New Mexico 1947 75 H 5 303.1 slice 10,80 AGEN France *Sept. 5, 1815 30 H 5 208.1 fragm. with crust 54,40 ALAMOGORDO USA, New Mexico 1938 13,6 H 5 2.1 fragment 0,80 ALLEGAN USA *July 10, 1899 35 H 5 276.0 5 small fragments 1,52 ALLEGAN USA *July 10, 1899 35 H 5 276.1 5 small fragments 1,50 ALLEGAN USA *July 10, 1899 35 H 5 276.2 chondrules 0,02 ALLEN USA, Texas 1923 recogn. -
Petrologic and Minerochemical Trends of Acapulcoites, Winonaites and Lodranites: New Evidence from Image Analysis and EMPA Investigations †
Geosciences 2015, 5, 222-242; doi:10.3390/geosciences5030222 OPEN ACCESS geosciences ISSN 2076-3263 www.mdpi.com/journal/geosciences Article Petrologic and Minerochemical Trends of Acapulcoites, Winonaites and Lodranites: New Evidence from Image † Analysis and EMPA Investigations Vanni Moggi Cecchi 1,‡,* and Stefano Caporali 2,3,‡ 1 Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Via La Pira 4, 50121 Florence, Italy 2 Dipartimento di Chimica, Università degli Studi di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy 3 Consorzio INSTM, Via Giusti 9, 50121 Florence, Italy; E-Mail: [email protected] † This paper is an extended version of our paper published in the 42nd Lunar and Planetary Science Conference, The Woodlands, TX, USA, 7–11 March 2011. ‡ These authors contributed equally to this work. * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +39-055-275-7456; Fax: +39-055-275-6322. Academic Editor: Jesus Martinez-Frias Received: 1 April 2015 / Accepted: 23 June 2015 / Published: 2 July 2015 Abstract: A comprehensive classification of primitive achondrites is difficult due to the high compositional and textural variability and the low number of samples available. Besides oxygen isotopic analysis, other minerochemical and textural parameters may provide a useful tool to solve taxonomic and genetic problems related to these achondrites. The results of a detailed modal, textural and minerochemical analysis of a set of primitive achondrites are presented and compared with literature data. All the samples show an extremely variable modal composition among both silicate and opaque phases. A general trend of troilite depletion vs. -
Silicate-Bearing Iron Meteorites and Their Implications for the Evolution Of
Chemie der Erde 74 (2014) 3–48 Contents lists available at ScienceDirect Chemie der Erde j ournal homepage: www.elsevier.de/chemer Invited Review Silicate-bearing iron meteorites and their implications for the evolution of asteroidal parent bodies ∗ Alex Ruzicka Cascadia Meteorite Laboratory, Portland State University, 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97207-0751, United States a r t a b i c s t l r e i n f o a c t Article history: Silicate-bearing iron meteorites differ from other iron meteorites in containing variable amounts of sili- Received 17 July 2013 cates, ranging from minor to stony-iron proportions (∼50%). These irons provide important constraints Accepted 15 October 2013 on the evolution of planetesimals and asteroids, especially with regard to the nature of metal–silicate Editorial handling - Prof. Dr. K. Heide separation and mixing. I present a review and synthesis of available data, including a compilation and interpretation of host metal trace-element compositions, oxygen-isotope compositions, textures, miner- Keywords: alogy, phase chemistries, and bulk compositions of silicate portions, ages of silicate and metal portions, Asteroid differentiation and thermal histories. Case studies for the petrogeneses of igneous silicate lithologies from different Iron meteorites groups are provided. Silicate-bearing irons were formed on multiple parent bodies under different con- Silicate inclusions Collisions ditions. The IAB/IIICD irons have silicates that are mainly chondritic in composition, but include some igneous lithologies, and were derived from a volatile-rich asteroid that underwent small amounts of silicate partial melting but larger amounts of metallic melting. A large proportion of IIE irons contain fractionated alkali-silica-rich inclusions formed as partial melts of chondrite, although other IIE irons have silicates of chondritic composition. -
From the President
Supplement to Meteoritics & Planetary Science, vol. 52, no. 11 The Meteoritical Society Newsletter (November 2017) A report of the business carried out by The Society over the past year, edited by Michael K. Weisberg, Secretary. IN THIS ISSUE From the President Important reminders Annual meetings Please renew your membership before Dec From the Treasurer 15 as the society has to pay the costs of From the Endowment Committee mailing late reminders. Members renewing Publications reports after March 31 incur a $15 surcharge and MAPS GCA risk missing issues of MAPS. You can renew Elements online at From the Nomenclature Committee http://metsoc.meteoriticalsociety.net. From the Membership Committee Nominate your colleagues and students for Awards and honors awards. Nominations for Fellows will be Call for nominations New Fellows to be elected considered this year. Deadlines are in From the Secretary January. See the Awards section for details. Election of new Council Proposals to host the 2022 MetSoc meeting are due in March. Please contact the secretary for procedures. FROM THE PRESIDENT President’s Report membership, and increasingly the commitment of an individual to take ownership of running our Meeting. The annual newsletter provides the President an I can say from experience that this is a somewhat opportunity to reflect on matters of interest to Society daunting task, but for those of us who have done it, it Members. First off I would like to thank Past has been a complete privilege and the memories President Mike Zolensky for all his hard work in generated go far beyond science, but are more akin to keeping the Society moving forward. -
Antarctic Meteorite
Antarctic Meteorite NewsletterNewsletter Volume 26, Number 2 August 2003 A periodical issued by the Meteorite Working Group to inform scientists Curator’s Comments of the basic characteristics of speci- Kevin Righter mens recovered in the Antarctic. New Meteorites Edited by Cecilia Satterwhite and This newsletter contains classifications for 443 new meteorites from the Kevin Righter, NASA Johnson Space Center, Houston, Texas 77058 2000, 2001 and 2002 ANSMET collections. They include samples from the MacAlpine Hills, LaPaz Icefields, Pecora Escarpment, Meteorite Hills, and Odell Glacier. Petrographic descriptions are given for 25 of the new meteorites: 1 lunar basalt, 1 lunar basaltic breccia, 3 acapulcoites, 1 aubrite, 1 diogenite, 2 eucrites, 3 Inside this Issue howardites, 1 R chondrite, 8 carbonaceous chondrites, 2 enstatite chondrites, 1 ordinary chondrite impact melt breccia, and 1 mesosiderite. The lunar basalt Curator’s Comments..............................1 (LAP02205) is unbrecciated and unlike any lunar meteorite in our collection. It Upcoming ANSMET Field may have similarities to other mare basalt meteorites such as Y793169 or NWA Season.................................................2 032/479. New Meteorites......................................3 Location Abbreviations and Map.......3 Table 1: Newly Classified Antarctic Meteorites ..................................... 4 Notes to Tables 1 & 2.......................12 Table 2: Newly Classified Meteorites by Type ..................... .13 Table 3: Tentative Pairings ..............14 Petrographic Descriptions ............... 15 Sample Request Guidelines ..............22 Antarctic Meteorite Laboratory Contacts ....................................... 22 Field photo of LAP 02205 Meteorites On-Line ..........................23 Changes to the classification database on the JSC website Changes have been made to the website classification database that will make navigation of our collection easier. First, many of the classifications have been updated. -
Black As Coal . Hard As Rock. Ordinary As a Chondrite
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. -
Compiled Thesis
SPACE ROCKS: a series of papers on METEORITES AND ASTEROIDS by Nina Louise Hooper A thesis submitted to the Department of Astronomy in partial fulfillment of the requirement for the Bachelor’s Degree with Honors Harvard College 8 April 2016 Of all investments into the future, the conquest of space demands the greatest efforts and the longest-term commitment, but it also offers the greatest reward: none less than a universe. — Daniel Christlein !ii Acknowledgements I finished this senior thesis aided by the profound effort and commitment of my thesis advisor, Martin Elvis. I am extremely grateful for him countless hours of discussions and detailed feedback on all stages of this research. I am also grateful for the remarkable people at Harvard-Smithsonian Center for Astrophysics of whom I asked many questions and who took the time to help me. Special thanks go to Warren Brown for his guidance with spectral reduction processes in IRAF, Francesca DeMeo for her assistance in the spectral classification of our Near Earth Asteroids and Samurdha Jayasinghe and for helping me write my data analysis script in python. I thank Dan Holmqvist for being an incredibly helpful and supportive presence throughout this project. I thank David Charbonneau, Alicia Soderberg and the members of my senior thesis class of astrophysics concentrators for their support, guidance and feedback throughout the past year. This research was funded in part by the Harvard Undergraduate Science Research Program. !iii Abstract The subject of this work is the compositions of asteroids and meteorites. Studies of the composition of small Solar System bodies are fundamental to theories of planet formation.