Formation of the Fe,Mg-Silicates, Fe0, and Graphite (Diamond) Assemblage as a Result of Cohenite Oxidation under Lithospheric Mantle Conditions
- 作者: Bataleva Y.1,2, Palyanov Y.1,2, Borzdov Y.1,2, Zdrokov E.1,2, Novoselov I.1,2, Sobolev N.1,2
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隶属关系:
- Sobolev Institute of Geology and Mineralogy, Siberian Branch
- Novosibirsk State University
- 期: 卷 479, 编号 1 (2018)
- 页面: 335-338
- 栏目: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/192472
- DOI: https://doi.org/10.1134/S1028334X18030017
- ID: 192472
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详细
Experimental studies in the Fe3C–SiO2–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 fO2 values near the iron–wustite buffer.
作者简介
Yu. Bataleva
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University
编辑信件的主要联系方式.
Email: bataleva@igm.nsc.ru
俄罗斯联邦, Novosibirsk, 630090; Novosibirsk
Yu. Palyanov
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University
Email: bataleva@igm.nsc.ru
俄罗斯联邦, Novosibirsk, 630090; Novosibirsk
Yu. Borzdov
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University
Email: bataleva@igm.nsc.ru
俄罗斯联邦, Novosibirsk, 630090; Novosibirsk
E. Zdrokov
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University
Email: bataleva@igm.nsc.ru
俄罗斯联邦, Novosibirsk, 630090; Novosibirsk
I. Novoselov
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University
Email: bataleva@igm.nsc.ru
俄罗斯联邦, Novosibirsk, 630090; Novosibirsk
N. Sobolev
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University
Email: bataleva@igm.nsc.ru
俄罗斯联邦, Novosibirsk, 630090; Novosibirsk