Stability of iron-bearing carbonates in the deep Earth’s interior
Abstract: The presence of carbonates in inclusions in diamonds coming from depths exceeding 670 km are obvious evidence that carbonates exist in the Earth’s lower mantle. However, their range of stability, crystal structures and the thermodynamic conditions of the decarbonation processes remain poorly constrained. Here we investigate the behaviour of pure iron carbonate at pressures over 100 GPa and temperatures over 2,500 K using single-crystal X-ray diffraction and Mössbauer spectroscopy in laser-heated diamond anvil cells. On heating to temperatures of the Earth’s geotherm at pressures to ∼50 GPa FeCO3 partially dissociates to form various iron oxides. At higher pressures FeCO3 forms two new structures—tetrairon(III) orthocarbonate Fe43+C3O12, and diiron(II) diiron(III) tetracarbonate Fe22+Fe23+C4O13, both phases containing CO4 tetrahedra. Fe4C4O13 is stable at conditions along the entire geotherm to depths of at least 2,500 km, thus demonstrating that self-oxidation-reduction reactions can preserve carbonates in the Earth’s lower mantle
- Location
-
Deutsche Nationalbibliothek Frankfurt am Main
- Extent
-
Online-Ressource
- Language
-
Englisch
- Notes
-
ISSN: 2041-1723
- Event
-
Veröffentlichung
- (where)
-
Freiburg
- (who)
-
Universität
- (when)
-
2024
- Creator
-
Cerantola, Valerio
Bykova, Elena
Kupenko, Ilya
Merlini, Marco
Ismailova, Leyla
McCammon, Catherine
Bykov, Maxim
Chumakov, Alexandr I.
Petitgirard, Sylvain
Kantor, Innokenty
Svitlyk, Volodymyr
Jacobs, Jeroen
Hanfland, Michael
Mezouar, Mohamed
Prescher, Clemens
Rüffer, Rudolf
Prakapenka, Vitali B.
Dubrovinsky, Leonid
- DOI
-
10.1038/ncomms15960
- URN
-
urn:nbn:de:bsz:25-freidok-2432370
- Rights
-
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
-
15.08.2025, 7:36 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Cerantola, Valerio
- Bykova, Elena
- Kupenko, Ilya
- Merlini, Marco
- Ismailova, Leyla
- McCammon, Catherine
- Bykov, Maxim
- Chumakov, Alexandr I.
- Petitgirard, Sylvain
- Kantor, Innokenty
- Svitlyk, Volodymyr
- Jacobs, Jeroen
- Hanfland, Michael
- Mezouar, Mohamed
- Prescher, Clemens
- Rüffer, Rudolf
- Prakapenka, Vitali B.
- Dubrovinsky, Leonid
- Universität
Time of origin
- 2024
Other Objects (12)
Quartz-bearing rhyolitic melts in the Earth’s mantle
Crustal carbonate build-up as a driver for Earth’s oxygenation
Iron alloys of volatile elements in the deep Earth’s interior
Special issue “DynamicEarth: Earth’s interior, surface, ocean, atmosphere, and near space interactions”
The Link Between Earth’s Rotation Rate and Earth’s Oxygenation
How lowermost mantle viscosity controls the chemical structure of Earth’s deep interior
Carbonate-silicate reactions at conditions of the Earth’s mantle and the role of carbonates as possible trace-element carriers
Experimental constraints on the compositions of sulphides and aqueous fluids in the Earth’s interior
Silicate solution, cation properties, and mass transfer by aqueous fluid in the Earth’s interior
Earth’s Nitrogen and Carbon Cycles
The fate of Earth’s ocean
Seismic insights into Earth’s core
Quartz-bearing rhyolitic melts in the Earth’s mantle
Crustal carbonate build-up as a driver for Earth’s oxygenation
Iron alloys of volatile elements in the deep Earth’s interior
Special issue “DynamicEarth: Earth’s interior, surface, ocean, atmosphere, and near space interactions”
The Link Between Earth’s Rotation Rate and Earth’s Oxygenation
How lowermost mantle viscosity controls the chemical structure of Earth’s deep interior
Carbonate-silicate reactions at conditions of the Earth’s mantle and the role of carbonates as possible trace-element carriers
Experimental constraints on the compositions of sulphides and aqueous fluids in the Earth’s interior
Silicate solution, cation properties, and mass transfer by aqueous fluid in the Earth’s interior
Earth’s Nitrogen and Carbon Cycles
The fate of Earth’s ocean
Seismic insights into Earth’s core
Quartz-bearing rhyolitic melts in the Earth’s mantle
Crustal carbonate build-up as a driver for Earth’s oxygenation
Iron alloys of volatile elements in the deep Earth’s interior
Special issue “DynamicEarth: Earth’s interior, surface, ocean, atmosphere, and near space interactions”
The Link Between Earth’s Rotation Rate and Earth’s Oxygenation
How lowermost mantle viscosity controls the chemical structure of Earth’s deep interior
Carbonate-silicate reactions at conditions of the Earth’s mantle and the role of carbonates as possible trace-element carriers
Experimental constraints on the compositions of sulphides and aqueous fluids in the Earth’s interior
Silicate solution, cation properties, and mass transfer by aqueous fluid in the Earth’s interior
Earth’s Nitrogen and Carbon Cycles
The fate of Earth’s ocean