CaltechAUTHORS
  A Caltech Library Service

Calcite and Dolomite without Portlandite at a new Eutectic in CaO-MgO-CO_2-H2_O with Applications to Carbonatites

Fanelli, M. F. and Cava, N. and Wyllie, P. J. (1986) Calcite and Dolomite without Portlandite at a new Eutectic in CaO-MgO-CO_2-H2_O with Applications to Carbonatites. In: Morphology and phase equilibria of minerals. Bulgarian Academy of Sciences , Sofia, Bulgaria, pp. 313-322. http://resolver.caltech.edu/CaltechAUTHORS:20160107-145521255

Full text is not posted in this repository.

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20160107-145521255

Abstract

Bröggers (1921) idea of a carbonatite magma was not widely accepted. Shand (1947, p. 326) concluded that "a carbonate magma…would be a very strange thing indeed". The existence of carbonatite magmas appeared less strange when Wyllie and Tuttle (1960) discovered that melts in the system CaO-CO_2-H_2O precipitate calcite down to temperatures below 650°C at very low pressures. The low-temperature synthetic carbonatite magmas are near a eutectic between calcite and portlandite in the system CaCO_3-Ca(OH)_2. A magmatic origin for most carbonatites was favored by the field evidence summarized in books by Heinrich (1966) and Tuttle and Gittins (1966), although the overprint of the deuteric stage and hydrothermal or carbothermal activity may obscure the interpretation.


Item Type:Book Section
Additional Information:© 1986 Bulgarian Academy of Sciences. This research was supported by the Earth Sciences Section of the National Science Foundation, NSF Grants EAR 76-20410 and EAR 81-08599.
Funders:
Funding AgencyGrant Number
NSFEAR 76-20410
NSFEAR 81-08599
Record Number:CaltechAUTHORS:20160107-145521255
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160107-145521255
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63456
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Jan 2016 23:08
Last Modified:07 Jan 2016 23:08

Repository Staff Only: item control page