Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia)
Diamond etching in high-temperature ambient-pressure experiments has been performed aimed to assess possible postimpact effects on diamonds in impact craters, for the case of the Popigai crater in Yakutia (Russia). The experiments with different etchants, including various combinations of silicate m...
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2021
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ftdoajarticles:oai:doaj.org/article:c4e393d1159047668b3c985175c17c6e 2023-05-15T18:45:05+02:00 Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia) Valeri Sonin Egor Zhimulev Aleksei Chepurov Ivan Gryaznov Anatoly Chepurov Valentin Afanasiev Nikolai Pokhilenko 2021-11-01T00:00:00Z https://doi.org/10.3390/min11111229 https://doaj.org/article/c4e393d1159047668b3c985175c17c6e EN eng MDPI AG https://www.mdpi.com/2075-163X/11/11/1229 https://doaj.org/toc/2075-163X doi:10.3390/min11111229 2075-163X https://doaj.org/article/c4e393d1159047668b3c985175c17c6e Minerals, Vol 11, Iss 1229, p 1229 (2021) impact diamonds etching experiments crystal morphology oxidation surface graphitization Popigai impact crater Mineralogy QE351-399.2 article 2021 ftdoajarticles https://doi.org/10.3390/min11111229 2022-12-31T08:05:34Z Diamond etching in high-temperature ambient-pressure experiments has been performed aimed to assess possible postimpact effects on diamonds in impact craters, for the case of the Popigai crater in Yakutia (Russia). The experiments with different etchants, including various combinations of silicate melts, air, and inert gases, demonstrated the diversity of microstructures on {111} diamond faces: negative or positive trigons, as well as hexagonal, round, or irregularly shaped etch pits and striation. The surface features obtained after etching experiments with kimberlitic diamonds are similar to those observed on natural impact diamonds with some difference due to the origin of the latter as a result of a martensitic transformation of graphite in target rocks. Extrapolated to natural impact diamonds, the experimental results lead to several inferences: (1) Diamond crystals experienced natural oxidation and surface graphitization during the pressure decrease after the impact event, while the molten target rocks remained at high temperatures. (2) Natural etching of diamonds in silicate melts is possible in a large range of oxidation states controlled by O 2 diffusion. (3) Impact diamonds near the surface of molten target rocks oxidized at the highest rates, whereas those within the melt were shielded from the oxidizing agents and remained unchanged. Article in Journal/Newspaper Yakutia Directory of Open Access Journals: DOAJ Articles Minerals 11 11 1229 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
impact diamonds etching experiments crystal morphology oxidation surface graphitization Popigai impact crater Mineralogy QE351-399.2 |
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impact diamonds etching experiments crystal morphology oxidation surface graphitization Popigai impact crater Mineralogy QE351-399.2 Valeri Sonin Egor Zhimulev Aleksei Chepurov Ivan Gryaznov Anatoly Chepurov Valentin Afanasiev Nikolai Pokhilenko Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia) |
topic_facet |
impact diamonds etching experiments crystal morphology oxidation surface graphitization Popigai impact crater Mineralogy QE351-399.2 |
description |
Diamond etching in high-temperature ambient-pressure experiments has been performed aimed to assess possible postimpact effects on diamonds in impact craters, for the case of the Popigai crater in Yakutia (Russia). The experiments with different etchants, including various combinations of silicate melts, air, and inert gases, demonstrated the diversity of microstructures on {111} diamond faces: negative or positive trigons, as well as hexagonal, round, or irregularly shaped etch pits and striation. The surface features obtained after etching experiments with kimberlitic diamonds are similar to those observed on natural impact diamonds with some difference due to the origin of the latter as a result of a martensitic transformation of graphite in target rocks. Extrapolated to natural impact diamonds, the experimental results lead to several inferences: (1) Diamond crystals experienced natural oxidation and surface graphitization during the pressure decrease after the impact event, while the molten target rocks remained at high temperatures. (2) Natural etching of diamonds in silicate melts is possible in a large range of oxidation states controlled by O 2 diffusion. (3) Impact diamonds near the surface of molten target rocks oxidized at the highest rates, whereas those within the melt were shielded from the oxidizing agents and remained unchanged. |
format |
Article in Journal/Newspaper |
author |
Valeri Sonin Egor Zhimulev Aleksei Chepurov Ivan Gryaznov Anatoly Chepurov Valentin Afanasiev Nikolai Pokhilenko |
author_facet |
Valeri Sonin Egor Zhimulev Aleksei Chepurov Ivan Gryaznov Anatoly Chepurov Valentin Afanasiev Nikolai Pokhilenko |
author_sort |
Valeri Sonin |
title |
Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia) |
title_short |
Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia) |
title_full |
Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia) |
title_fullStr |
Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia) |
title_full_unstemmed |
Experimental Etching of Diamonds: Extrapolation to Impact Diamonds from the Popigai Crater (Russia) |
title_sort |
experimental etching of diamonds: extrapolation to impact diamonds from the popigai crater (russia) |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/min11111229 https://doaj.org/article/c4e393d1159047668b3c985175c17c6e |
genre |
Yakutia |
genre_facet |
Yakutia |
op_source |
Minerals, Vol 11, Iss 1229, p 1229 (2021) |
op_relation |
https://www.mdpi.com/2075-163X/11/11/1229 https://doaj.org/toc/2075-163X doi:10.3390/min11111229 2075-163X https://doaj.org/article/c4e393d1159047668b3c985175c17c6e |
op_doi |
https://doi.org/10.3390/min11111229 |
container_title |
Minerals |
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11 |
container_issue |
11 |
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1229 |
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1766236027896201216 |