Identification of the ejecta deposit formed by the Australasian Tektite Event at Huai Om, northeastern Thailand
Identification of the ejecta deposit formed by the Australasian Tektite Event at Huai Om, northeastern Thailand
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泰国东北部怀奥姆澳大利亚玻璃陨石事件形成的喷射物沉积物的鉴定
DOI:
10.1111/maps.13908
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Tajika Eiichi
中科院分区:
文献类型:
--
作者:
Tada Toshihiro;Tada Ryuji;Carling Paul A.;Songtham Wickanet;Chansom Praphas;Kogure Toshihiro;Chang Yu;Tajika Eiichi
The Australasian Tektite Event, approximately 0.8 Ma, is the youngest record of a large impact event on Earth. Although it is estimated that it occurred somewhere in Indochina based on the distribution of tektites, the crater has never been located. Here, we report the discovery and occurrence of shocked quartz with planar deformation features (PDFs) in the Quaternary depositional sequence at Huai Om in northeastern Thailand. Measurements of the orientation of lamellae using a universal stage microscope as well as observation using scanning electron microscopy and transmission electron microscopy were conducted to confirm the presence of PDFs. Together with the occurrence of in situ layered tektite fragments, we identify the depositional sequence as the ejecta deposit formed by the Australasian Tektite Event. We further describe the detailed lithostratigraphy of the ejecta deposit, which will allow the tracing of its distribution and lateral changes in its thickness, grain size, and grain composition. Further investigation of the lateral distribution of the ejecta deposit would provide information about the location, magnitude, and target rocks of the Australasian Tektite Event.
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影响因子:
56.9
作者:
ALVAREZ, LW;ALVAREZ, W;MICHEL, HV
通讯作者:
MICHEL, HV
DOI:
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发表时间:
2003
期刊:
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作者:
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DOI:
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期刊:
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DOI:
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发表时间:
2008
期刊:
Meteoritics & Planetary Science 43
影响因子:
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DOI:
10.1130/0-8137-2307-8.75
发表时间:
1996
期刊:
影响因子:
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作者:
A. Ocampo;K. Pope;A. G. Fischer
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