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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Experimental modeling of ankerite–pyrite interaction under lithospheric mantle p–t parameters: Implications for graphite formation as a result of ankerite sulfidation. / Bataleva, Yuliya V.; Novoselov, Ivan D.; Borzdov, Yuri M. et al.

In: Minerals, Vol. 11, No. 11, 1267, 11.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{99a530dd9aa14ec48b6ac99546201deb,

title = "Experimental modeling of ankerite–pyrite interaction under lithospheric mantle p–t parameters: Implications for graphite formation as a result of ankerite sulfidation",

abstract = "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 С0 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.",

keywords = "Ankerite, Experimental modeling, Graphite formation, High-pressure experiment, Lithospheric mantle, Mantle sulfides, Pyrite, Sulfidation",

author = "Bataleva, {Yuliya V.} and Novoselov, {Ivan D.} and Borzdov, {Yuri M.} and Furman, {Olga V.} and Palyanov, {Yuri N.}",

note = "Funding Information: Funding: This work was supported by the Russian Science Foundation under Grant No. 19-17-00075. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = nov,

doi = "10.3390/min11111267",

language = "English",

volume = "11",

journal = "Minerals",

issn = "2075-163X",

publisher = "MDPI AG",

number = "11",

}

RIS

TY - JOUR

T1 - Experimental modeling of ankerite–pyrite interaction under lithospheric mantle p–t parameters: Implications for graphite formation as a result of ankerite sulfidation

AU - Bataleva, Yuliya V.

AU - Novoselov, Ivan D.

AU - Borzdov, Yuri M.

AU - Furman, Olga V.

AU - Palyanov, Yuri N.

PY - 2021/11

Y1 - 2021/11

N2 - 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 С0 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.

AB - 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 С0 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.

KW - Ankerite

KW - Experimental modeling

KW - Graphite formation

KW - High-pressure experiment

KW - Lithospheric mantle

KW - Mantle sulfides

KW - Pyrite

KW - Sulfidation

UR - http://www.scopus.com/inward/record.url?scp=85118949717&partnerID=8YFLogxK

U2 - 10.3390/min11111267

DO - 10.3390/min11111267

M3 - Article

AN - SCOPUS:85118949717

VL - 11

JO - Minerals

JF - Minerals

SN - 2075-163X

IS - 11

M1 - 1267

ER -

ID: 34643112