Jesenice—A new meteorite fall from Slovenia
Identifieur interne : 000521 ( Main/Exploration ); précédent : 000520; suivant : 000522Jesenice—A new meteorite fall from Slovenia
Auteurs : Addi Bischoff [Allemagne] ; Miha Jersek [Slovénie] ; Thomas Grau [Allemagne] ; Breda Mirtic [Slovénie] ; Ulrich Ott [Allemagne] ; Jan Ku Era [République tchèque] ; Marian Horstmann [Allemagne] ; Matthias Laubenstein [Italie] ; Siegfried Herrmann [Allemagne] ; Zden K Anda [République tchèque] ; Marc Weber [Allemagne] ; Gerd Heusser [Allemagne]Source :
- Meteoritics & Planetary Science [ 1086-9379 ] ; 2011-06.
Abstract
Abstract– On April 9, 2009, at 3:00 CEST, a very bright fireball appeared over Carinthia and the Karavanke Mountains. The meteoroid entered the atmosphere at a very steep angle and disintegrated into a large number of objects. Two main objects were seen as separate fireballs up to an altitude of approximately 5 km, and witnesses reported loud explosions. Three stones were found with a total weight of approximately 3.611 kg. The measured activity of short‐lived cosmogenic radionuclides clearly indicates that two specimens result from a very recent meteorite fall. All cosmogenic radionuclide concentrations suggest a rather small preatmospheric radius of <20 cm; a nominal cosmic‐ray exposure age based on 21Ne is approximately 4 Ma, but the noble gas and radionuclide results in combination indicate a complex irradiation. Jesenice is a highly recrystallized rock with only a few relic chondrules visible in hand specimen and thin section. The texture, the large grain size of plagioclase, and the homogeneous compositions of olivines and pyroxenes clearly indicate that Jesenice is a L6 chondrite. The bulk composition of Jesenice is very close to the published average element concentration for L ordinary chondrites. The chondrite is weakly shocked (S3) as indicated by the undulatory extinction in olivine and plagioclase and the presence of planar fractures in olivine. Being weakly shocked and with gas retention ages of >1.7 Ga (4He) and approximately 4.3 Ga (40Ar), Jesenice seems not to have been strongly affected by the catastrophic disruption of the L‐chondrite parent body approximately 500 Ma ago.
Url:
DOI: 10.1111/j.1945-5100.2011.01191.x
Affiliations:
- Allemagne, Italie, République tchèque, Slovénie
- District de Münster, Rhénanie-Palatinat, Rhénanie-du-Nord-Westphalie
- Mayence, Münster
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Le document en format XML
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to="804">804</biblScope></imprint><idno type="ISSN">1086-9379</idno></series><idno type="istex">DB8113B9614DFC9BE7681347A05B7D98CB2BA5E7</idno><idno type="DOI">10.1111/j.1945-5100.2011.01191.x</idno><idno type="ArticleID">MAPS1191</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1086-9379</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Abstract– On April 9, 2009, at 3:00 CEST, a very bright fireball appeared over Carinthia and the Karavanke Mountains. The meteoroid entered the atmosphere at a very steep angle and disintegrated into a large number of objects. Two main objects were seen as separate fireballs up to an altitude of approximately 5 km, and witnesses reported loud explosions. Three stones were found with a total weight of approximately 3.611 kg. The measured activity of short‐lived cosmogenic radionuclides clearly indicates that two specimens result from a very recent meteorite fall. All cosmogenic radionuclide concentrations suggest a rather small preatmospheric radius of <20 cm; a nominal cosmic‐ray exposure age based on 21Ne is approximately 4 Ma, but the noble gas and radionuclide results in combination indicate a complex irradiation. Jesenice is a highly recrystallized rock with only a few relic chondrules visible in hand specimen and thin section. The texture, the large grain size of plagioclase, and the homogeneous compositions of olivines and pyroxenes clearly indicate that Jesenice is a L6 chondrite. The bulk composition of Jesenice is very close to the published average element concentration for L ordinary chondrites. The chondrite is weakly shocked (S3) as indicated by the undulatory extinction in olivine and plagioclase and the presence of planar fractures in olivine. Being weakly shocked and with gas retention ages of >1.7 Ga (4He) and approximately 4.3 Ga (40Ar), Jesenice seems not to have been strongly affected by the catastrophic disruption of the L‐chondrite parent body approximately 500 Ma ago.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Italie</li><li>République tchèque</li><li>Slovénie</li></country><region><li>District de Münster</li><li>Rhénanie-Palatinat</li><li>Rhénanie-du-Nord-Westphalie</li></region><settlement><li>Mayence</li><li>Münster</li></settlement></list><tree><country name="Allemagne"><region name="Rhénanie-du-Nord-Westphalie"><name sortKey="Bischoff, Addi" sort="Bischoff, Addi" uniqKey="Bischoff A" first="Addi" last="Bischoff">Addi Bischoff</name></region><name sortKey="Grau, Thomas" sort="Grau, Thomas" uniqKey="Grau T" first="Thomas" last="Grau">Thomas Grau</name><name sortKey="Herrmann, Siegfried" sort="Herrmann, Siegfried" uniqKey="Herrmann S" first="Siegfried" last="Herrmann">Siegfried Herrmann</name><name sortKey="Heusser, Gerd" sort="Heusser, Gerd" uniqKey="Heusser G" first="Gerd" last="Heusser">Gerd Heusser</name><name sortKey="Horstmann, Marian" sort="Horstmann, Marian" uniqKey="Horstmann M" first="Marian" last="Horstmann">Marian Horstmann</name><name sortKey="Ott, Ulrich" sort="Ott, Ulrich" uniqKey="Ott U" first="Ulrich" last="Ott">Ulrich Ott</name><name sortKey="Weber, Marc" sort="Weber, Marc" uniqKey="Weber M" first="Marc" last="Weber">Marc Weber</name></country><country name="Slovénie"><noRegion><name sortKey="Jersek, Miha" sort="Jersek, Miha" uniqKey="Jersek M" first="Miha" last="Jersek">Miha Jersek</name></noRegion><name sortKey="Mirtic, Breda" sort="Mirtic, Breda" uniqKey="Mirtic B" first="Breda" last="Mirtic">Breda Mirtic</name></country><country name="République tchèque"><noRegion><name sortKey="Ku Era, Jan" sort="Ku Era, Jan" uniqKey="Ku Era J" first="Jan" last="Ku Era">Jan Ku Era</name></noRegion><name sortKey=" Anda, Zden K" sort=" Anda, Zden K" uniqKey=" Anda Z" first="Zden K" last=" Anda">Zden K Anda</name><name sortKey="Ku Era, Jan" sort="Ku Era, Jan" uniqKey="Ku Era J" first="Jan" last="Ku Era">Jan Ku Era</name></country><country name="Italie"><noRegion><name sortKey="Laubenstein, Matthias" sort="Laubenstein, Matthias" uniqKey="Laubenstein M" first="Matthias" last="Laubenstein">Matthias Laubenstein</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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