Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation

Experimental modeling of ankerite–pyrite interaction was carried out on a multi-anvil high-pressure apparatus of a “split sphere” type (6.3 GPa, 1050–1550 °C, 20–60 h). At T ≤ 1250 °C, the formation of pyrrhotite, dolomite, magnesite, and metastable graphite was established. At higher temperatures,...

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Autores principales:	Yuliya V. Bataleva, Ivan D. Novoselov, Yuri M. Borzdov, Olga V. Furman, Yuri N. Palyanov
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	graphite formation ankerite pyrite sulfidation mantle sulfides high-pressure experiment Mineralogy QE351-399.2
Acceso en línea:	https://doaj.org/article/526bf40c137d4c289a36d27caed33b1a
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spelling	oai:doaj.org-article:526bf40c137d4c289a36d27caed33b1a2021-11-25T18:26:43ZExperimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation10.3390/min111112672075-163Xhttps://doaj.org/article/526bf40c137d4c289a36d27caed33b1a2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1267https://doaj.org/toc/2075-163XExperimental modeling of ankerite–pyrite interaction was carried out on a multi-anvil high-pressure apparatus of a “split sphere” type (6.3 GPa, 1050–1550 °C, 20–60 h). At T ≤ 1250 °C, the formation of pyrrhotite, dolomite, magnesite, and metastable graphite was established. At higher temperatures, the generation of two immiscible melts (carbonate and sulfide ones), as well as graphite crystallization and diamond growth on seeds, occurred. It was established that the decrease in iron concentration in ankerite occurs by extraction of iron by sulfide and leads to the formation of pyrrhotite or sulfide melt, with corresponding ankerite breakdown into dolomite and magnesite. Further redox interaction of Ca,Mg,Fe carbonates with pyrrhotite (or between carbonate and sulfide melts) results in the carbonate reduction to C<sup>0</sup> and metastable graphite formation (±diamond growth on seeds). It was established that the ankerite–pyrite interaction, which can occur in a downgoing slab, involves ankerite sulfidation that triggers further graphite-forming redox reactions and can be one of the scenarios of the elemental carbon formation under subduction settings.Yuliya V. BatalevaIvan D. NovoselovYuri M. BorzdovOlga V. FurmanYuri N. PalyanovMDPI AGarticlegraphite formationankeritepyritesulfidationmantle sulfideshigh-pressure experimentMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1267, p 1267 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	graphite formation ankerite pyrite sulfidation mantle sulfides high-pressure experiment Mineralogy QE351-399.2
spellingShingle	graphite formation ankerite pyrite sulfidation mantle sulfides high-pressure experiment Mineralogy QE351-399.2 Yuliya V. Bataleva Ivan D. Novoselov Yuri M. Borzdov Olga V. Furman Yuri N. Palyanov Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation
description	Experimental modeling of ankerite–pyrite interaction was carried out on a multi-anvil high-pressure apparatus of a “split sphere” type (6.3 GPa, 1050–1550 °C, 20–60 h). At T ≤ 1250 °C, the formation of pyrrhotite, dolomite, magnesite, and metastable graphite was established. At higher temperatures, the generation of two immiscible melts (carbonate and sulfide ones), as well as graphite crystallization and diamond growth on seeds, occurred. It was established that the decrease in iron concentration in ankerite occurs by extraction of iron by sulfide and leads to the formation of pyrrhotite or sulfide melt, with corresponding ankerite breakdown into dolomite and magnesite. Further redox interaction of Ca,Mg,Fe carbonates with pyrrhotite (or between carbonate and sulfide melts) results in the carbonate reduction to C<sup>0</sup> and metastable graphite formation (±diamond growth on seeds). It was established that the ankerite–pyrite interaction, which can occur in a downgoing slab, involves ankerite sulfidation that triggers further graphite-forming redox reactions and can be one of the scenarios of the elemental carbon formation under subduction settings.
format	article
author	Yuliya V. Bataleva Ivan D. Novoselov Yuri M. Borzdov Olga V. Furman Yuri N. Palyanov
author_facet	Yuliya V. Bataleva Ivan D. Novoselov Yuri M. Borzdov Olga V. Furman Yuri N. Palyanov
author_sort	Yuliya V. Bataleva
title	Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation
title_short	Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation
title_full	Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation
title_fullStr	Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation
title_full_unstemmed	Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation
title_sort	experimental modeling of ankerite–pyrite interaction under lithospheric mantle p–t parameters: implications for graphite formation as a result of ankerite sulfidation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/526bf40c137d4c289a36d27caed33b1a
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Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation

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