Program with Links to Abstracts
Times are listed in
the Europe/Brussels time zone.
Add Time Zone
Presolar Grains, Micrometeorites, and Interplanetary Dust Particles 2
Monday, July 29, 2024, 1:30 PM
Throne Room
Chairs:
Lisa Krämer Ruggiu
Jenny Feige
Jenny Feige
1:30 PM
Riebe M. E. I.*
Allen N. M.
Maden C.
Cody G. D.
Linking Micrometeorite Noble Gases to Atmospheric Entry Temperatures: An Experimental Study
[#6249]
Micrometeorites are altered during atmospheric entry heating. We heated meteorite fragments to study these effects on noble gases and textures and to establish a method for determining peak T during atmospheric entry using He-release curves.
Micrometeorites are altered during atmospheric entry heating. We heated meteorite fragments to study these effects on noble gases and textures and to establish a method for determining peak T during atmospheric entry using He-release curves.
1:45 PM
Allen N. M.*
Riebe M. E.I.
Väisänen S. T.
Kohout T.
Suhonen H.
et al.
Atmospheric Entry Heating in Antarctic Micrometeorites
[#6204]
Antarctic micrometeorites were imaged and classified. Their peak atmospheric entry temperatures were determined (~800°–1600°C) by measuring He release curves and comparing to curves from experimentally heated meteorite samples.
Antarctic micrometeorites were imaged and classified. Their peak atmospheric entry temperatures were determined (~800°–1600°C) by measuring He release curves and comparing to curves from experimentally heated meteorite samples.
2:00 PM
Feige J.*
Airo A.
Berger D.
Brückner D.
Gärtner A.
et al.
Constraints on the Spatial Origins of Individual Micrometeorites: Evidence from Cosmogenic Radionuclides 26Al and 10Be
[#6399]
The study examines cosmogenic radionuclides in micrometeorites to determine their cosmic-ray exposure ages and solar system origins. Results suggest diverse origins, from near-Earth to Kuiper belt, with implications for interplanetary dust transport.
The study examines cosmogenic radionuclides in micrometeorites to determine their cosmic-ray exposure ages and solar system origins. Results suggest diverse origins, from near-Earth to Kuiper belt, with implications for interplanetary dust transport.
2:15 PM
Rojas J.*
Alexander C. M. O'D.
Nittler L. R.
Stroud R. M.
Wang J.
et al.
The Diversity of C and N Isotopes in Organics of Ultracarbonaceous and Fine-Grained Micrometeorites
[#6115]
We investigated the C and N isotopes of organic matter (OM) in ultracarbonaceous and fine-grained micrometeorites (UCAMMs and Fg-MMs). The C and N isotopes indicate that the OM in UCAMMs and Fg-MMs might originate from distinct parent reservoirs.
We investigated the C and N isotopes of organic matter (OM) in ultracarbonaceous and fine-grained micrometeorites (UCAMMs and Fg-MMs). The C and N isotopes indicate that the OM in UCAMMs and Fg-MMs might originate from distinct parent reservoirs.
2:30 PM
Bejach L.*
Mathurin J.
Rojas J.
Engrand C.
Duprat J.
et al.
Cometary-Like Organic Matter in Asteroidal Matrix: Nano-Chemical and Isotopic Composition Insight on the Asteroid-Comet Continuum
[#6268]
Asteoid-comet dichotomy is challenged by a micrometeorite which exhibit asteroidal mineralogy, comparable to Ryugu’s, and cometary-like organic matter according to H, C, and N isotopes. This OM is studied at nanometer scale by AFM-IR and NanoSIMS.
Asteoid-comet dichotomy is challenged by a micrometeorite which exhibit asteroidal mineralogy, comparable to Ryugu’s, and cometary-like organic matter according to H, C, and N isotopes. This OM is studied at nanometer scale by AFM-IR and NanoSIMS.
2:45 PM
Krämer Ruggiu L.*
Goderis S.
Villeneuve J.
Da Silva A.-C.
Percival L.
Tracing Variations in the Flux of Extraterrestrial Material Through Time
[#6028]
We extract micrometeorites from Late Devonian limestones from Chanxhe in Belgium in order to reconstruct a first ET flux at high resolution and identify all potential variations in the ET material across the selected stratigraphic interval.
We extract micrometeorites from Late Devonian limestones from Chanxhe in Belgium in order to reconstruct a first ET flux at high resolution and identify all potential variations in the ET material across the selected stratigraphic interval.
3:00 PM
Mattia I. S.*
Genge M. J.
Suttle M. D.
Blard P. H.
Fenisse G.
et al.
Fossil I-Types as Carrier Phases of Extraterrestrial 3He in the Geological Record
[#6148]
Since extraterrestrial 3He is implanted into cosmic dust by solar wind in interplanetary space, fossil iron-rich micrometeorites could play a significant role as carriers of 3He in sedimentary archives, which is assessed in this study.
Since extraterrestrial 3He is implanted into cosmic dust by solar wind in interplanetary space, fossil iron-rich micrometeorites could play a significant role as carriers of 3He in sedimentary archives, which is assessed in this study.
*presenter
