A chondrule formation experiment aboard the ISS: microtomography, scanning electron microscopy and Raman spectroscopy on Mg2SiO4 dust aggregates
- We performed an experiment under long-term microgravity conditions aboard the International Space Station (ISS) to obtain information on the energetics and experimental constraints required for the formation of chondrules in the solar nebula by ’nebular lightning’. As a simplified model system, we exposed porous forsterite (Mg2 SiO4) dust particles to high-energetic arc discharges. The characterization of the samples after their return by synchrotron microtomography and scanning electron microscopy revealed that aggregates had formed, consisting of several fused Mg2SiO4 particles. The partial melting and fusing of Mg2SiO4 dust particles under microgravity conditions leads to a strong reduction of their porosity. The experimental outcomes vary strongly in their appearance from small spherical melt-droplets (∅≈90 µm) to bigger and irregularly shaped aggregates (∅≈350 µm). Our results provided new constraints with respect to energetic aspects of chondrule formation and a roadmap for future and more complex experiments on Earth and in microgravity conditions.
Verfasserangaben: | Dominik SpahrORCiDGND, Tamara KochORCiDGND, David MergesGND, Lkhamsuren BayarjargalORCiDGND, Philomena-Theresa GenzelORCiD, Oliver ChristORCiD, Fabian WildeORCiD, Frank E. BrenkerORCiDGND, Björn WinklerORCiDGND |
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URN: | urn:nbn:de:hebis:30:3-695899 |
DOI: | https://doi.org/10.1007/s00269-022-01185-7 |
ISSN: | 1432-2021 |
Titel des übergeordneten Werkes (Englisch): | Physics and chemistry of minerals |
Verlag: | Springer |
Verlagsort: | Berlin ; Heidelberg |
Dokumentart: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Datum der Veröffentlichung (online): | 03.05.2022 |
Datum der Erstveröffentlichung: | 03.05.2022 |
Veröffentlichende Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Datum der Freischaltung: | 16.10.2023 |
Freies Schlagwort / Tag: | Arc discharges; Chondrule formation; International Space Station ISS; Microgravity; Microtomography |
Jahrgang: | 49 |
Ausgabe / Heft: | art. 10 |
Aufsatznummer: | 10 |
Seitenzahl: | 9 |
Erste Seite: | 1 |
Letzte Seite: | 9 |
Bemerkung: | The authors are grateful for financial support by the Dr. Rolf M. Schwiete Stiftung, DFG (Wi1232, BA4020), the BMWi (50JR1704), the German Aerospace Center (DLR), ZEISS, BIOVIA, DreamUp, NanoRacks and Nordlicht. We acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities |
Bemerkung: | Open Access funding enabled and organized by Projekt DEAL |
HeBIS-PPN: | 515131806 |
Institute: | Geowissenschaften / Geographie |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
Sammlungen: | Universitätspublikationen |
Lizenz (Deutsch): | Creative Commons - CC BY - Namensnennung 4.0 International |