Comparison of Australasian Tektites with Australasian Microtektites and BeLaU Spherules Recovered from the Ocean
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2025
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Hyung, E.
Levy, E.
Cook, L.
Jacobsen, S.B.
Loeb, A.
Squire, J.
Farkas, J.
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Research Notes of the American Astronomical Society, 2025; 9(10):283-1-283-4
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Eugenia Hyung, Emma Levy, Loralei Cook, Stein B. Jacobsen, Abraham Loeb, Jayden Squire, Juraj Farkas
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The Australasian strewn field covers more than 15% of Earth’s surface, consisting of tektites and microtektites. Australasian tektites from Southeast Asia and Australia, as well as microtektites recovered from deep sea sediments and Antarctica, are established to be derived from upper continental crust sediments. An expedition to retrieve remnants of bolide CNEOS 2014 January 8 (IM1), held in the Pacific Ocean, was in proximity to the known extent of the Australasian strewn field, and yielded “BeLaU”-spherules, whose compositions did not match most well-studied solar system material. We therefore report precise and comprehensive elemental data for Australasian tektites to compare their elemental abundances to those of Australasian microtektites from deep sea sediments, and BeLaU. Our findings corroborate previous studies that Australasian tektites and microtektites closely resemble the elemental abundance patterns of the upper continental crust. Meanwhile, the elemental patterns of the BeLaU-spherules are distinct from the Australasian tektite/microtektite compositions.
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© 2025 The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Everyone is permitted to use all or part of the original content in this article, provided that they adhere to all the terms of the licence https://creativecommons.org/licences/by/4.0. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permissions may be required.