DECARBONATION REACTION OF MAGNESITE IN SUBDUCTING SLABS AT THE LOWER MANTLE

Takafuji N.; Fujino K.; Nagai T.; Seto Y.; Hamane D.

dc.contributor.author	Takafuji N.
dc.contributor.author	Fujino K.
dc.contributor.author	Nagai T.
dc.contributor.author	Seto Y.
dc.contributor.author	Hamane D.
dc.date.accessioned	2025-04-25T03:22:10Z
dc.date.available	2025-04-25T03:22:10Z
dc.date.issued	2006
dc.identifier	https://elibrary.ru/item.asp?id=51460926
dc.identifier.citation	Physics and Chemistry of Minerals, 2006, 33, 10, 651-654
dc.identifier.issn	0342-1791
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/49065
dc.description.abstract	High-pressure and temperature experiments (28–62 GPa, and 1,490–2,000 K, corresponding to approximately 770–1,500 km depth in the mantle) have been conducted on a MgCO3 + SiO2 mixture using a laser-heated diamond anvil cell combined with analytical transmission electron microscope observation of the product phases to constrain the fate of carbonates carried on the subducting basalt into the lower mantle. At these conditions, the decarbonation reaction MgCO3 (magnesite) + SiO2 (stishovite) → MgSiO3 (perovskite) + CO2 (solid) has been recognized. This indicates that above reaction takes place as a candidate for decarbonation of the carbonated subducting mid ocean ridge basalts in the Earth’s lower mantle.
dc.subject	HIGH-PRESSURE SOLID CO2
dc.subject	CARBONATE
dc.subject	SLAB
dc.subject	DIAMOND
dc.title	DECARBONATION REACTION OF MAGNESITE IN SUBDUCTING SLABS AT THE LOWER MANTLE
dc.type	Статья
dc.identifier.doi	10.1007/s00269-006-0119-5