Formation of the Fe,Mg-Silicates, Fe-0, and Graphite (Diamond) Assemblage as a Result of Cohenite Oxidation under Lithospheric Mantle Conditions

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Formation of the Fe,Mg-Silicates, Fe-0, and Graphite (Diamond) Assemblage as a Result of Cohenite Oxidation under Lithospheric Mantle Conditions. / Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M. et al.

In: Doklady Earth Sciences, Vol. 479, No. 1, 03.2018, p. 335-338.

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

BibTeX

@article{969ced7496424087b58dc8569c16d8d3,

title = "Formation of the Fe,Mg-Silicates, Fe-0, and Graphite (Diamond) Assemblage as a Result of Cohenite Oxidation under Lithospheric Mantle Conditions",

abstract = "Experimental studies in the Fe 3 C–SiO 2 –MgO system (P = 6.3 GPa, T = 1100–1500°C, t = 20–40 h) have been carried out. It has been established that carbide-oxide interaction resulted in the formation of Fe-orthopyroxene, graphite, wustite, and cohenite (1100 and 1200°C), as well as a Fe–C–O melt (1300–1500°C). The main processes occurring in the system at 1100 and 1200°C are the oxidation of cohenite, the extraction of carbon from carbide, and the crystallization of metastable graphite, as well as the formation of ferrosilicates. At T ≥ 1300°C, graphite crystallization and diamond growth occur as a result of the redox interaction of a predominantly metallic melt (Fe–C–O) with oxides and silicates. The carbide–oxide interaction studied can be considered as the basis for modeling a number of carbon-producing processes in the lithospheric mantle at fO 2 values near the iron–wustite buffer. ",

keywords = "P-T PARAMETERS, IRON CARBIDE, CRYSTAL-GROWTH, INCLUSIONS, CARBON",

author = "Bataleva, {Yu. V.} and Palyanov, {Yu. N.} and Borzdov, {Yu. M.} and Zdrokov, {E. V.} and Novoselov, {I. D.} and Sobolev, {N. V.}",

year = "2018",

month = mar,

doi = "10.1134/S1028334X18030017",

language = "English",

volume = "479",

pages = "335--338",

journal = "Doklady Earth Sciences",

issn = "1028-334X",

publisher = "PLEIADES PUBLISHING INC",

number = "1",

}

RIS

TY - JOUR

T1 - Formation of the Fe,Mg-Silicates, Fe-0, and Graphite (Diamond) Assemblage as a Result of Cohenite Oxidation under Lithospheric Mantle Conditions

AU - Bataleva, Yu. V.

AU - Palyanov, Yu. N.

AU - Borzdov, Yu. M.

AU - Zdrokov, E. V.

AU - Novoselov, I. D.

AU - Sobolev, N. V.

PY - 2018/3

Y1 - 2018/3

N2 - Experimental studies in the Fe 3 C–SiO 2 –MgO system (P = 6.3 GPa, T = 1100–1500°C, t = 20–40 h) have been carried out. It has been established that carbide-oxide interaction resulted in the formation of Fe-orthopyroxene, graphite, wustite, and cohenite (1100 and 1200°C), as well as a Fe–C–O melt (1300–1500°C). The main processes occurring in the system at 1100 and 1200°C are the oxidation of cohenite, the extraction of carbon from carbide, and the crystallization of metastable graphite, as well as the formation of ferrosilicates. At T ≥ 1300°C, graphite crystallization and diamond growth occur as a result of the redox interaction of a predominantly metallic melt (Fe–C–O) with oxides and silicates. The carbide–oxide interaction studied can be considered as the basis for modeling a number of carbon-producing processes in the lithospheric mantle at fO 2 values near the iron–wustite buffer.

AB - Experimental studies in the Fe 3 C–SiO 2 –MgO system (P = 6.3 GPa, T = 1100–1500°C, t = 20–40 h) have been carried out. It has been established that carbide-oxide interaction resulted in the formation of Fe-orthopyroxene, graphite, wustite, and cohenite (1100 and 1200°C), as well as a Fe–C–O melt (1300–1500°C). The main processes occurring in the system at 1100 and 1200°C are the oxidation of cohenite, the extraction of carbon from carbide, and the crystallization of metastable graphite, as well as the formation of ferrosilicates. At T ≥ 1300°C, graphite crystallization and diamond growth occur as a result of the redox interaction of a predominantly metallic melt (Fe–C–O) with oxides and silicates. The carbide–oxide interaction studied can be considered as the basis for modeling a number of carbon-producing processes in the lithospheric mantle at fO 2 values near the iron–wustite buffer.

KW - P-T PARAMETERS

KW - IRON CARBIDE

KW - CRYSTAL-GROWTH

KW - INCLUSIONS

KW - CARBON

UR - http://www.scopus.com/inward/record.url?scp=85063896904&partnerID=8YFLogxK

U2 - 10.1134/S1028334X18030017

DO - 10.1134/S1028334X18030017

M3 - Article

VL - 479

SP - 335

EP - 338

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 1

ER -

ID: 18648202