干旱区生态环境知识资源中心(Arid): A 650 km(2) Miocene strewnfield of splash-form impact glasses in the Atacama Desert, Chile

Arid

DOI	10.1016/j.epsl.2021.117049
	A 650 km(2) Miocene strewnfield of splash-form impact glasses in the Atacama Desert, Chile
	Gattacceca, J.; Devouard, B. A.; Barrat, J-A; Rochette, P.; Balestrieri, M. L.; Bigazzi, G.; Menard, G.; Moustard, F.; Dos Santos, E.; Scorzelli, R.; Valenzuela, M.; Quesnel, Y.; Gounelle, M.; Debaille, V; Beck, P.; Bonal, L.; Reynard, B.; Warner, M.
通讯作者	Gattacceca, J (corresponding author), Aix Marseille Univ, CNRS, IRD, INRAE,CEREGE, F-13545 Aix En Provence, France.
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
ISSN	0012-821X
EISSN	1385-013X
出版年	2021
卷号	569
英文摘要	Glassy ejecta are associatedto a limited number of impact craters, and yet hold key information about hypervelocity impact processes. Here we report on the discovery of a similar to 650 km(2) impact glass strewnfield in the Central Depression of the Atacama Desert. These cm-sized splash-form objects, that we refer to as atacamaites, are essentially composed of a dacitic glass formed by high-temperature melting of local magmatic rocks, with the addition of a variable iron meteorite contamination, 5 wt.% on average. The most likely nature for the impactor is the IIAB iron group. The fission-track plateau method, on two samples, yielded a mean formation age of 7.83 +/- 0.26 Ma. No associated impact crater has been discovered so far, suggesting it may be a relatively small, km-sized crater. The glassy nature, aerodynamic shapes, elevated formation temperature, and low water content are reminiscent of tektites. However, their small size, heterogeneity, oxidation state, significant contamination by the impactor, and likely more proximal provenance distinguish them from tektites. Atacamaites have no equivalent among the few known terrestrial ejected impact glasses, and increase the intriguing diversity of such products that we propose to name tektoids. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	impact glasses Atacama Desert tektites
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000671231800005
WOS关键词	FE-57 MOSSBAUER-SPECTROSCOPY ; FISSION-TRACK AGES ; MAGNETIC-PROPERTIES ; METEORITE FLUX ; TEKTITES ; ORIGIN ; CRATER ; GEOCHEMISTRY ; ELEMENT ; ROCKS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349956
作者单位	[Gattacceca, J.; Devouard, B. A.; Rochette, P.; Menard, G.; Moustard, F.; Quesnel, Y.] Aix Marseille Univ, CNRS, IRD, INRAE,CEREGE, F-13545 Aix En Provence, France; [Barrat, J-A] Univ Brest, CNRS, IRD, IFREMER,LEMAR, F-29280 Plouzane, France; [Balestrieri, M. L.; Bigazzi, G.] CNR, Inst Geosci & Earth Resources, I-56124 Pisa, Italy; [Dos Santos, E.] Univ Fed Vales Jequitinhonha & Mucuri UFVJM, Inst Ciencia & Tecnol, BR-39100000 Diamantina, MG, Brazil; [Scorzelli, R.] Ctr Brasileiro Pesquisas Fis CBPF, BR-22290180 Rio De Janeiro, RJ, Brazil; [Valenzuela, M.] Univ Catolica Norte, Dept Ciencias Geol, Av Angamos 0610, Antofagasta, Chile; [Valenzuela, M.] Millennium Inst Astrophys, Av Vicuna Mackenna 4860, Santiago, Chile; [Gounelle, M.] Sorbonne Univ, Museum Natl Hist Nat, CNRS, IMPMC, F-75005 Paris, France; [Debaille, V] Univ Libre Bruxelles, Lab G Time, B-1050 Brussels, Belgium; [Beck, P.; Bonal, L.] Univ Grenoble Alpes, CNRS, IPAG, F-38400 Grenoble, France; [Reynard, B.] Univ Lyon, ENSL, UCBL, CNRS,LGL TPE,...
推荐引用方式 GB/T 7714	Gattacceca, J.,Devouard, B. A.,Barrat, J-A,et al. A 650 km(2) Miocene strewnfield of splash-form impact glasses in the Atacama Desert, Chile[J]. French National Research Institute for Sustainable Development,2021,569.
APA	Gattacceca, J..,Devouard, B. A..,Barrat, J-A.,Rochette, P..,Balestrieri, M. L..,...&Warner, M..(2021).A 650 km(2) Miocene strewnfield of splash-form impact glasses in the Atacama Desert, Chile.EARTH AND PLANETARY SCIENCE LETTERS,569.
MLA	Gattacceca, J.,et al."A 650 km(2) Miocene strewnfield of splash-form impact glasses in the Atacama Desert, Chile".EARTH AND PLANETARY SCIENCE LETTERS 569(2021).