A two stage impact melting process in an impact glass strewn field from the Atacama Desert

被引：3

作者：

Rochette, P. ^{[1
]}

Di Vincenzo, G. ^{[2
]}

Gattacceca, J. ^{[1
]}

Barrat, J. A. ^{[3
]}

Devouard, B. ^{[1
]}

Folco, L. ^{[4
]}

Musolino, A. ^{[1
]}

Quesnel, Y. ^{[1
]}

机构：

[1] Aix Marseille Univ, CNRS, IRD, INRAE,CEREGE, Aix en Provence, France

[2] CNR, Ist Geoscienze & Georisorse, Via G Moruzzi 1, I-56124 Pisa, Italy

[3] Univ Brest, CNRS, Ifremer, IRD,LEMAR, Plouzane, France

[4] Univ Pisa, Dipartimento Sci Terra, V S Maria 53, I-56126 Pisa, Italy

来源：

GEOCHEMICAL PERSPECTIVES LETTERS | 2024年 / 30卷

关键词：

TARGET ROCKS; TEKTITES; CRATER; GEOCHEMISTRY; MAGMATISM; EJECTA; BE-10;

D O I：

10.7185/geochemlet.2418

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A new type of silica-rich glass has been discovered associated with the known impact glass strewn field of the Atacama Desert. Based on petrography, chemical composition and indistinguishable Ar-40/Ar-39 formation ages at circa 6.6 Ma, we infer that these two glasses were produced by the same impact event, which gave rise to two successive compositionally different melt batches in close succession. The first one is a silicarich melt derived from a mixture of quartz sand and weathered magmatic rocks. It is reduced and devoid of extraterrestrial contamination. The second one, much more abundant and which corresponds to the normal glass, is oxidised, highly contaminated by the iron type impactor and derived from an underlying unweathered dacitic rock. This scheme sheds a new light on the first second of the interaction between the Earth surface and a large metallic asteroid.

引用

页码：28 / 33

页数：6

共 25 条

[1]

Artemieva N, 2002, IMPACT STUD, P257

[2] Atmospheric Interactions of Ejecta on Earth and Mars Including the Effect of Vaporization [J].

Carlson, M. A. ;

Melosh, H. J. ;

Johnson, B. C. .

PLANETARY SCIENCE JOURNAL, 2023, 4 (10)

[3] High precision multi-collector 40Ar/39Ar dating of moldavites (Central European tektites) reconciles geochrological and paleomagnetic data [J].

Di Vincenzo, Gianfranco .

CHEMICAL GEOLOGY, 2022, 608

[4] Geochemical processes between steel projectiles and silica-rich targets in hypervelocity impact experiments [J].

Ebert, Matthias ;

Hecht, Lutz ;

Deutsch, Alexander ;

Kenkmann, Thomas ;

Wirth, Richard ;

Berndt, Jasper .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2014, 133 :257-279

[5] Target-projectile interaction during impact melting at Kamil Crater, Egypt [J].

Fazio, Agnese ;

D'Orazio, Massimo ;

Cordier, Carole ;

Folco, Luigi .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2016, 180 :33-50

[6] The chondritic impactor origin of the Ni-rich component in Australasian tektites and microtektites [J].

Folco, L. ;

Rochette, P. ;

D'Orazio, M. ;

Masotta, M. .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2023, 360 :231-240

[7] Microscopic impactor debris at Kamil Crater (Egypt): The origin of the Fe-Ni oxide spherules [J].

Folco, L. ;

Carone, L. ;

D'Orazio, M. ;

Cordier, C. ;

Suttle, M. D. ;

van Ginneken, M. ;

Masotta, M. .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2022, 335 :297-322

[8] A 650 km2 Miocene strewnfield of splash-form impact glasses in the Atacama Desert, Chile [J].

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. .

EARTH AND PLANETARY SCIENCE LETTERS, 2021, 569

[9]

Glass B.P., 2013, Distal Impact Ejecta Layers: A Record of Large Impacts in Sedimentary Deposits, DOI [10.1007/978-3-540-88262-6, DOI 10.1007/978-3-540-88262-6]

[10] Silicate liquid immiscibility in impact melts [J].

Hamann, Christopher ;

Fazio, Agnese ;

Ebert, Matthias ;

Hecht, Lutz ;

Wirth, Richard ;

Folco, Luigi ;

Deutsch, Alex ;

Reimold, Wolf Uwe .

METEORITICS & PLANETARY SCIENCE, 2018, 53 (08) :1594-1632

← 1 2 3 →