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DOI | 10.1073/pnas.1904368116 |
Australasian impact crater buried under the Bolaven volcanic field, Southern Laos | |
Sieh, Kerry1; Herrin, Jason1; Jicha, Brian2; Angel, Dayana Schonwalder1; Moore, James D. P.1; Banerjee, Paramesh1; Wiwegwin, Weerachat3; Sihavong, Vanpheng4; Singer, Brad2; Chualaowanich, Tawachai3; Charusiri, Punya5 | |
2020-01-21 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:3页码:1346-1353 |
文章类型 | Article |
语种 | 英语 |
国家 | Singapore; USA; Thailand; Laos |
英文摘要 | 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-km(3) volcanic field in Southern Laos: 1) Tektite geo-chemistry implies the presence of young, weathered basalts at the site at the time of the impact. 2) Geologic mapping and Ar-40-Ar-39 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 similar to 17 x 13-km crater. 4) The nature of an outcrop of thick, crudely layered, bouldery sandstone and mud-stone 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. |
英文关键词 | Australasian impact crater Lao tektite |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000508977600023 |
WOS关键词 | MINERAL INCLUSIONS ; SHOCK METAMORPHISM ; LAYERED TEKTITES ; CHINA SEA ; MICROTEKTITES ; LOCATION ; ORIGIN ; QUARTZ ; CONSTRAINTS ; SIZE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249642 |
专题 | 地球科学 |
作者单位 | 1.Nanyang Technol Univ, Earth Observ Singapore, Singapore 639798, Singapore; 2.Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA; 3.Minist Nat Resources & Environm, Dept Mineral Resources, Bangkok 10400, Thailand; 4.Minist Energy & Mines, Dept Geol & Mines, Viangchan, Laos; 5.Chulalongkorn Univ, Dept Geol, Bangkok 10330, Thailand |
推荐引用方式 GB/T 7714 | Sieh, Kerry,Herrin, Jason,Jicha, Brian,et al. Australasian impact crater buried under the Bolaven volcanic field, Southern Laos[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(3):1346-1353. |
APA | Sieh, Kerry.,Herrin, Jason.,Jicha, Brian.,Angel, Dayana Schonwalder.,Moore, James D. P..,...&Charusiri, Punya.(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. |
MLA | Sieh, Kerry,et al."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(2020):1346-1353. |
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