Please use this identifier to cite or link to this item:
Title: Australasian impact crater buried under the Bolaven volcanic field, Southern Laos
Authors: Sieh, Kerry
Herrin, Jason
Jicha, Brian
Schonwalder Angel, Dayana
Moore, James Daniel Paul
Banerjee, Paramesh
Wiwegwin, Weerachat
Sihavong, Vanpheng
Singer, Brad
Chualaowanich, Tawachai
Charusiri, Punya
Keywords: Science::Geology
Issue Date: 2020
Source: Sieh, K., Herrin, J., Jicha, B., Schonwalder Angel, D., Moore, J. D. P., Banerjee, P., Wiwegwin, W., Sihavong, V., Singer, B., Chualaowanich, T. & Charusiri, P. (2020). Australasian impact crater buried under the Bolaven volcanic field, Southern Laos. Proceedings of the National Academy of Sciences of the United States of America, 117(3), 1346-1353.
Journal: Proceedings of the National Academy of Sciences of the United States of America 
Abstract: The crater and proximal effects of the largest known young meteorite impact on Earth have eluded discovery for nearly a century. We present 4 lines of evidence that the 0.79-Ma impact crater of the Australasian tektites lies buried beneath lavas of a long-lived, 910-km3 volcanic field in Southern Laos: 1) Tektite geochemistry implies the presence of young, weathered basalts at the site at the time of the impact. 2) Geologic mapping and 40Ar-39Ar dates confirm that both pre- and postimpact basaltic lavas exist at the proposed impact site and that postimpact basalts wholly cover it. 3) A gravity anomaly there may also reflect the presence of a buried ∼17 × 13-km crater. 4) The nature of an outcrop of thick, crudely layered, bouldery sandstone and mudstone breccia 10-20 km from the center of the impact and fractured quartz grains within its boulder clasts support its being part of the proximal ejecta blanket.
ISSN: 0027-8424
DOI: 10.1073/pnas.1904368116
DOI (Related Dataset): 10.21979/N9/CTNDZQ
Rights: © 2020 The Author(s). Published by National Academy of Sciences. This open access article is distributed under Creative Commons Attribution-NonCommercialNoDerivatives License 4.0 (CC BY-NC-ND).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

Files in This Item:
File Description SizeFormat 
1346.full.pdf3.59 MBAdobe PDFThumbnail

Citations 20

Updated on Nov 24, 2021

Citations 20

Updated on Nov 24, 2021

Page view(s)

Updated on Jan 19, 2022


Updated on Jan 19, 2022

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.