Russian Mineralogical Society
200th Anniversary Meeting of the Russian Mineralogical Society
The first finding of CaSiO3 phase with a perovskite crystal structure as an inclusion in a diamond: new data on the lower mantle

RMS-DPI code:  2017-1-162-0
Scientific session:  4. Minerals as indicators of the rock and ore formation.
Author listing:  Korolev N., Nestola F., Kopylova M.
Principal author:  Korolev Nester
Language:  Russian
Abstract - Summary 
(short description):
Here we document the first discovery, to our knowledge, of the perovskite structured polymorph of CaSiO3 in nature, found included within a diamond from the Cullinan kimberlite, South Africa. This finding firmly establishes this phase as a component of Earth’s mantle. Experimental phase equilibria studies of CaSiO3 indicate a minimum depth of origin of the host diamond at ~ 550 km, but more likely below 660 km where its stability field expands in peridotite.

Keywords: CaSi-perovskite, lower mantle, diamond
 
RMS-DPI code:  2017-1-162-0
Pages:  246-247
File of proceedings 
(PDF): 
 101 K
Status:  printed
Recieved:  28/08/2017
Accepted:  16/09/2017
Published on-line:  07/12/2017
Permanent address of publication:  http://www.minsoc.ru/2017-1-162-0/
Contact author(s):  Korolev, Nester

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printed on 10/07/2020