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meteorites tektites impactites meteorites EDITOR: Tadeusz A. Przylibski December Table of Contents 2011 Krzesińska A., High resolution X-ray tomography as a tool for analysis of internal textures in meteorites . 3 Semenenko V.P., Girich A.L., Shkurenko K.O., Kychan N.V., Shyrinbekova S.N., Gorovenko T.M., Nanometer-sized mineral grains and their genetic types in meteorites . 13 Karwowski Ł., Pilski A.S., Muszyński A., Arnold S., Notkin G., Gurdziel A., New finds iin the Morasko meteorite preserve, Poland . 21 Szurgot M., Polański K., Investigations of HaH 286 eucrite by analytical electron microscopy . 29 Vol. 1 www.meteorites.pwr.wroc.pl No. 1 ISSN 2299-0313 www.meteorites.pwr.wroc.pl meteorites Editor: Tadeusz A. Przylibski Associate editors Crew Ulrich Ott Hasnaa Chennaoui Aoudjehane Dominik Hezel University of Cologne Max-Planck-Institut für Chemie Hassan II University Casablanca EDITOR-IN-CHIEF: Köln, Germany Mainz, Germany Casablanca, Morocco Tadeusz A. Przylibski Wrocław University of Technology Philippe Schmitt-Kopplin Arnold Gucsik Faculty of Geoengineering, Mining and Geology Helmholtz Zentrum München Osaka University Institute of Mining Engineering Neuherberg, Germany Osaka, Japan Plac Teatralny 2, 50-051, Wrocław, Poland [email protected] MANAGING EDITOR: Editorial Board Tomasz Jakubowski Łukasz Karwowski Andrzej S. Pilski [email protected] University of Silesia Nicholaus Copernicus Museum Sosnowiec, Poland in Frombork ARTICLES TECHNICAL EDITOR Frombork, Poland Marek J. Battek [email protected] Ryszard Kryza Andrzej Muszyński Wrocław University Adam Mickiewicz University WEB PAGE TECHNICAL EDITOR: Wrocław, Poland Poznań, Poland Tomasz Stawarz [email protected] Anna Karczemska Stanisław Mitura Technical University of Łódź Koszalin University of Technology NATIVE: Łódź, Poland Koszalin, Poland Jason Utas [email protected] LINGUISTIC EDITOR: Jakub Radwan [email protected] Meteorites Publishers Wrocław University of Technology Faculty of Geoengineering, Mining and Geology Wybrzeże S. Wyspiańskiego 27 50-370 Wrocław, Poland Polish Meteorite Society Będzińska 60 41-200 Sosnowiec, Poland Photo on cover: Shear fracture in a radial pyroxene chondrule from the Pułtusk meteorite. Horsetailing structure at the termination of the fracture occurs. Shear sense is sinistral. Photo Agata Krzesińska Meteorites Vol. 1, No. 1, 2011, 1 www.meteorites.pwr.wroc.pl JOURNAL INFORMATION Meteorites provides a coherent international forum newly-discovered extraterrestrial mineral species, but for the publication of research in the field of mete- it also gladly accepts articles covering more common oritics and its related disciplines. The topics of inter- groups of meteorites. Due to their relatively low sci- est range from, but are not limited to, meteorites and entific value in terms of current research trends, many other kinds of extraterrestrial matter and their sources interesting research results are quietly filed away into of origin through the examination of the mineral re- archives instead of being published in leading scien- sources of the Solar System, to tektites, impactites, tific journals. and impact structures. Our intention is not to compete with existing Meteorites invites the submission of articles cover- journals, but to add to the currently limited publi- ing the broadly defined field of meteorites. In addition cation space for researches on meteorites. Meteorites to publication of research results, however, authors are editors will gladly accept any reliable research results, encouraged to share and present astronomical, petro- including submissions that are virtually impossible to logical, mineralogical, geochemical, and isotopic data publish in today’s existing journals due to the appar- on all groups and types of meteorites. Meteorites is ent mediocrity of the specimens studied. At Meteor- intended to serve as a basic reference source for in- ites, we believe that even profoundly studied mete- depth analyses and compilations on particular mete- orites can have a significant and relevant bearing on orite groups and their parent bodies, as well as the our knowledge and understanding of the solar system. genesis and evolution of the Solar System, as well as Meteorites will, in time, develop into a repository of other planetary systems. data and knowledge available for everyone with an in- Considering the progress of human space explo- terest in extraterrestrial matter. ration and conceivable colonization of other planets, Our purpose is to develop a new interdisciplinary this data will likely play an important role in the rec- journal covering the multitude of subject matters in- ognition and exploitation of extraterrestrial mineral volved in meteorite research. Due to an insufficient resources. Therefore, in light of the potential benefits, amount of publication space, the increasing number Meteorites editors have no intention of rejecting paper of specimens available for research, and a growing list submissions pertaining to the research of meteorites of research centers, only a small percentage of valuable with provisional names and pending classifications, submissions is ever brought to publication. esp. prior to their approval by the Committee on Me- Through the Open Access publications, Meteorites teorite Nomenclature of the Meteoritical Society. aims to support academic work and to act as an acces- Meteorites invites the publication of important sible research data center. Meteorites is available free papers intended as reference sources for other re- of charge in print or digital document. Each paper is searchers, as well as compilations and interpretations thoroughly reviewed by experts in the field. Submis- of other works on meteorites of lesser scientific impor- sions should be sent directly to the e-mail address of tance and their parent bodies. Not only does Meteor- the secretary: [email protected]. Authors are ites welcome submissions of research descriptions and required to follow the guidelines available at http:// results regarding ‘rare’ meteorites, and topics such as www.meteorites.pwr.wroc.pl Meteorites Vol. 1, No. 1, 2011, 3–12 www.meteorites.pwr.wroc.pl DOI 10.5277/met110101 HIGH RESOLUTION X-RAY TOMOGRAPHY AS A TOOL FOR ANALYSIS OF INTERNAL TEXTURES IN METEORITES Agata KRZESIŃSKA1 1 Polish Academy of Sciences, Institute of Geological Sciences, ul. Podwale 75, 50-449 Wrocław, Poland. Abstract: A comparison of internal textures of the NWA-5929, Ghubara and Pułtusk chondrites has been carried out using high resolution X-ray tomography. This is a powerful, non-destructive technique that allows one to determine textural andcomposi- tional differences that occur between ordinary chondrites of various groups by means of grey-level scale histograms, first-order statistics, and 3D imaging. Deformational structures in the Pułtusk meteorite such as cataclastic zones, impact melt clasts, melt veins, and melt pockets are observed and studied. Measurements of metal particle size are achieved, giving even deeper insight into textural features of meteorite. My approach shows that as shock deformation occurred, numerous small metal grains became progressively dispersed within the volume of the deformed Pułtusk meteorite rock. Simultaneously, metal was mobilized via frictional or direct impact melting to form scarce large metal nodules or grains arranged along the margins of relict chondritic clasts or as components of irregular injection veining. The possibility of tracing of these impact related processes by using tomography micrograms (without breaking the sample) isvery useful for distinguishing which parts of each meteorite were deformed in different ways in order to make first-order observations regarding the deformational history of these meteorites. Keywords: NWA-5929, Ghubara, Pułtusk, high resolution X-ray computed tomography, deformation INTRODUCTION High resolution X-ray tomography (HR XCT) is At that time, however, few works were dedicated to a non-destructive method of analyzing solid-state studying the internal textures of meteorites (Rubin et bodies. For this reason, it has recently become one of al., 2001; Żbik & Self, 2005) or the potential that HR the important tools for studying extraterrestrial ma- XCT had for refining the classification of meteorites terials like meteorites (Rubin et al., 2001; Ebel et al., (Friedrich, 2008). 2008; Hezel et al., 2010; Kuebler et al., 1999; Nettles Textures of meteorites are still usually studied by & McSween, 2006; Tsuchiyama et al., 2002), Antarc- making thin sections. This necessitates cutting the tic micrometeorites (Okazawa et al., 2002), interplan- meteorite to be studied. However, with help of HR etary dust particles, and material from sample-return XCT, significant data on meteorites’ internal texture missions (Nakamura et al., 2008). HR XCT was first may be collected without (or before) the partitioning utilized by Masuda et al. (1986) to study Antarctic of the sample. This paper shows that, with the aidof meteorites in which silicates, sulphides and metal par- HR XCT, it is possible to demonstrate numerous dif- ticles were distinguished, although no textural infor- ferences between undeformed samples and samples mation was obtained because attainable resolution was that were cataclased or impact-melted with included then insufficient (~0.25 mm). The first real textural metal veins or silicate-melt veins, melt pockets, and observations were carried out by Kondo et al. (1997), metal nodules. Author was also able to make semi- when they resolved porphyritic