Auflistung Alle Publikationen nach Mitwirkenden "Pack, Andreas"
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Blaubeuren, Cloppenburg, and Machtenstein—Three recently recognized H‐group chondrite finds in Germany with distinct terrestrial ages and weathering effects
Bischoff, Addi; Storz, Jakob; Barrat, Jean‐Alix; Heinlein, Dieter; Jull, A. J. Timothy; Merchel, Silke; Pack, Andreas; Rugel, Georg (Meteoritics & Planetary Science, 2022-01-17)In the last 7 years, three meteorites (Blaubeuren, Cloppenburg, and Machtenstein) found in Germany were identified as chondrites. Two of these rocks had been recovered from the impact sites decades ago but were not considered ... -
Description of an aerodynamic levitation apparatus with applications in Earth sciences
Pack, Andreas; Kremer, Katrina; Albrecht, Nina; Simon, Klaus; Kronz, Andreas (Geochemical Transactions, 2010)Background: In aerodynamic levitation, solids and liquids are floated in a vertical gas stream. In combination with CO2-laser heating, containerless melting at high temperature of oxides and silicates is possible. We ... -
Hf-W chronology of a macrochondrule from the L5/6 chondrite Northwest Africa 8192
Hellmann, Jan L.; Kruijer, Thomas S.; Metzler, Knut; Patzek, Markus; Pack, Andreas; Berndt, Jasper; Kleine, Thorsten (Meteoritics & Planetary Science, 2020)A large, igneous-textured, and 2 cm-sized spherical object from the L5/6 chondrite NWA 8192 was investigated for its chemical composition, petrography, O isotopic composition, and Hf-W chronology. The petrography and ... -
Oxygen and Carbon Isotope Variations in a Modern Rodent Community – Implications for Palaeoenvironmental Reconstructions
Background: The oxygen (d18O) and carbon (d13C) isotope compositions of bioapatite from skeletal remains of fossil mammals are well-established proxies for the reconstruction of palaeoenvironmental and palaeoclimatic ... -
The chondrite breccia of Antonin (L4‐5)—A new meteorite fall from Poland with a heterogeneous distribution of metal
Bischoff, Addi; Patzek, Markus; Peters, Stefan T. M.; Barrat, Jean‐Alix; Di Rocco, Tommaso; Pack, Andreas; Ebert, Samuel; Jansen, Christian A.; Kmieciak, Kryspin (Meteoritics & Planetary Science, 2022-08-23)On July 15, 2021, a huge fireball was visible over Poland. After the possible strewn field was calculated, the first and so far only sample, with a mass of 350 g, was discovered 18 days after the fireball event. The Antonin ... -
The polymict carbonaceous breccia Aguas Zarcas: A potential analog to samples being returned by the OSIRIS‐REx and Hayabusa2 missions
Kerraouch, Imene; Bischoff, Addi; Zolensky, Michael E.; Pack, Andreas; Patzek, Markus; Hanna, Romy D.; Fries, Marc D.; Harries, Dennis; Kebukawa, Yoko; Le, Loan; Ito, Motoo; Rahman, Zia (Meteoritics & Planetary Science, 2021-02-02)On April 23, 2019, a meteorite fall occurred in Aguas Zarcas, Costa Rica. According to the Meteoritical Bulletin, Aguas Zarcas is a brecciated CM2 chondrite dominated by two lithologies. Our X‐ray computed tomography (XCT) ... -
Tourmaline Reference Materials for the In Situ Analysis of Oxygen and Lithium Isotope Ratio Compositions
Wiedenbeck, Michael; Trumbull, Robert B.; Rosner, Martin; Boyce, Adrian; Fournelle, John H.; Franchi, Ian A.; Halama, Ralf; Harris, Chris; Lacey, Jack H.; Marschall, Horst; Meixner, Anette; Pack, Andreas; Pogge von Strandmann, Philip A.E.; Spicuzza, Michael J.; Valley, John W.; Wilke, Franziska D.H. (Geostandards and Geoanalytical Research, 2020-11-07)Three tourmaline reference materials sourced from the Harvard Mineralogical and Geological Museum (schorl 112566, dravite 108796 and elbaite 98144), which are already widely used for the calibration of in situ boron isotope ... -
Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules
Pack, Andreas; Höweling, Andres; Hezel, Dominik C.; Stefanak, Maren T.; Beck, Anne-Katrin; Peters, Stefan T. M.; Sengupta, Sukanya; Herwartz, Daniel; Folco, Luigi (Nature communications, 2017-06-01)Molten I-type cosmic spherules formed by heating, oxidation and melting of extraterrestrial Fe,Ni metal alloys. The entire oxygen in these spherules sources from the atmosphere. Therefore, I-type cosmic spherules are ... -
Zhamanshin astrobleme provides evidence for carbonaceous chondrite and post-impact exchange between ejecta and Earth’s atmosphere
Magna, Tomáš; Žák, Karel; Pack, Andreas; Moynier, Frédéric; Mougel, Bérengère; Peters, Stefan; Skála, Roman; Jonášová, Šárka; Mizera, Jiří; Řanda, Zdeněk (Nature Communications, 2017)Chemical fingerprints of impacts are usually compromised by extreme conditions in the impact plume, and the contribution of projectile matter to impactites does not often exceed a fraction of per cent. Here we use chromium ...