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Impact Sample Observations

Tuesday, March 12, 2024, 2:15 PM
Montgomery Ballroom

Ania Losiak
Matthew Huber
Amanda Binkley
2:15 PM
Session Introduction
2:20 PM
Moreau J.-G.* Jõeleht A. Losiak A. Zhu M.-H. Ferrière L. Plado J.
Occurrence of Shatter Cones at Kaali Crater, Estonia: A Modeling Approach [#1429]
The main crater of the Kaali crater strewn field was successfully reproduced with 2-D shock simulations. One aspect of the study was to estimate the formation location of shatter cones recently described in our study.
2:30 PM
Hostrawser J. W.* Hayden T. S. Osinski G. R.
Compositional Variability in Inter-Mingled Impact Melts at Kamestastin (Mistastin) Crater, Labrador [#2208]
Samples from Kamestastin (aka Mistastin) crater, Canada, a lunar analogue, contain melt bodies with varying texture and vesicularity. These melt bodies are in contact with impact-melt-bearing breccia. What do these reveal about melt-sheet evolution?
2:40 PM
Davis J. R.* Crow C. A. Osinski G. R.
A Coordinated 40Ar/39Ar Thermochronology and Shock Study from the Kamestastin Lake Impact Structure [#2387]
Big smashed up crater / Did it mess with age dating? / Impactful study.
2:50 PM
Huber M. S.* Kovaleva E. Syczewski M.
Complex Post-Impact Evolution of Impact Melt at the Vredefort Impact Crater [#2437]
Impact melt cools / Crystals grow in many ways / History revealed.
3:00 PM
Panel Q&A
3:20 PM
Schulz T. Koeberl C.*
Spherule-Matrix Complementarity in an Archean Impact Spherule Deposit from Barberton, South Africa [#1357]
Spherule layers are remnants of impact events on the early Earth. Detailed geochemical studies provide information on these early large impact events that certainly also influenced the development of early life on Earth.
3:30 PM
Schultz P. H.* Harris R. S. Tomlinson A. Blanco N.
Formation and Emplacement of Pica Glasses, Atacama, Chile [#2450]
New field studies of the Pica glasses reveal a much broader distribution that requires either a much larger air burst exceeding 2000 sq km or multiple objects that exploded close to the surface less than 11,500 years ago.
3:40 PM
Loeb A. Jacobsen S. B.* Adamson T. Bergstrom S. Cloete R. Cohen S. et al.
Spherules Recovered from the Pacific Ocean Site of the CNEOS 2014-01-08 (IM1) Bolide [#2130]
850 spherules recovered from the path of the bolide CNEOS 2014-01-08. 78% are primitive, not affected by planetary differentiation. 22% reflect planetary igneous differentiation, a few with an excess of Be, La and U, up to ~1000 times CI chondrites.
3:50 PM
Fernando B.* Charalambous C. Desch S. Jackson A. Mialle P. Sansom E. K. et al.
Probably Not Aliens — Seismic Data Analysis from the 2014 'Interstellar Meteor' [#2595]
We reanalyse seismic data from this event, and find the localisation is likely overstated and/or wrong.
4:00 PM
Panel Q&A
4:20 PM
Losiak A.* Plado J. Jõeleht A. Vesconi M. A. Vesconi D. P. Crósta A. P. et al.
Campo del Cielo, Argentina: When Was It Really Formed? [#1499]
We dated Campo del Cielo. It is likely ~2000 years younger than previously thought.
4:30 PM
Soro P.* Rochette P. Baratoux D. Kouamelan A. N.
Cote d'Ivoire Tektite Strewn Field [#1960]
New exploration missions in the Côte d’Ivoire tektite strewn field have extended the boundaries of the known tektite field with 174 new specimens. Their geochemistry seems more varied than previous results based on a much smaller number of specimens.
4:40 PM
Binkley A. P.* Crane K. Potter-McIntyre S. L.
Complex Crater Morphology Reflects Tectonics at Oasis Crater, Libya: Exploring new ways to interpret tectonics on Mars [#1756]
This preliminary study uses Oasis Crater as a terrestrial analog for complex polygonal impact crater formation. Strike orientations suggest the central uplift forms using old, pre-existing tectonic fabrics, while additional rings use newer fabrics.
4:50 PM
Diaz C. A.* Flowers R. M. Crow C. A. Metcalf J. R. Economos R. Erickson T. et al.
Phosphate (U-Th)/He Thermochronology of Apollo 14 Melt Breccia 14311 [#2459]
Low-temperature thermochronology has the potential to decipher thermal histories related to impact events over vast timescales. We present initial results for the first lunar phosphate (U-Th)/He dating on an Apollo 14 melt-breccia.
5:00 PM
Panel Q&A
5:20 PM
Session Closure