Stability of methane in reduced C–O–H fluid at 6.3 GPa and 1300–1400°C

A. G. Sokol, A. A. Tomilenko, T. A. Bul’bak, G. A. Palyanova, Yu N. Palyanov, N. V. Sobolev

Результат исследования: Научные публикации в периодических изданияхстатья

1 Цитирования (Scopus)

Аннотация

The composition of a reduced C–O–H fluid was studied by the method of chromatography–mass spectrometry under the conditions of 6.3 GPa, 1300–1400°C, and fO2 typical of the base of the subcratonic lithosphere. Fluids containing water (4.4–96.3 rel. %), methane (37.6–0.06 rel. %), and variable concentrations of ethane, propane, and butane were obtained in experiments. With increasing fO2, the proportion of the CH4/C2H6 peak areas on chromatograms first increases and then decreases, whereas the CH4/C3H8 and CH4/C4H10 ratios continually decrease. The new data show that ethane and heavier HCs may be more stable to oxidation, than previously thought. Therefore, when reduced fluids pass the “redox-front,” carbon is not completely released from the fluid and may be involved in diamond formation.

Язык оригиналаанглийский
Страницы (с-по)680-683
Число страниц4
ЖурналDoklady Earth Sciences
Том474
Номер выпуска2
DOI
СостояниеОпубликовано - 1 июн 2017

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