CaltechAUTHORS
  A Caltech Library Service

Subsolidus and melting relationships for calcite, magnesite and the join CaCO_3-MgCO_3 to 36 kb

Irving, Anthony J. and Wyllie, Peter J. (1975) Subsolidus and melting relationships for calcite, magnesite and the join CaCO_3-MgCO_3 to 36 kb. Geochimica et Cosmochimica Acta, 39 (1). pp. 35-53. ISSN 0016-7037. http://resolver.caltech.edu/CaltechAUTHORS:20160120-144703664

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20160120-144703664

Abstract

Subsolidus and melting relations for the CaCO_3-MgCO_3 join at 30 kb have been determined using piston-cylinder apparatus. Data are also presented for the melting curve of CaCO_3 to 30 kb, the decomposition and melting curves of MgCO_3 to 36 kb, and the calcite-aragonite transition at 800°C, 950°C and 1100°C. At 30kb, the melting loop for the CaCO_3-MgCO_3 join extends from 1610°C (CaCO_3) to 1585°C (MgCO_3) through a liquidus minimum at 1290°C (near 42 mole% MgCO_3). The dolomite-magnesite solvus barely intersects the 30 kb melting loop to produce a peritectic reaction at 1385°C. Integration of the new experimental data with other published data permits construction of a complete P-T projection and a sequence of isobars for the CaCO_3-MgCO_3 join for pressures between 5 and 30 kb. The phase relations for this join provide part of the essential framework of the model peridotite system CaO-MgO-SiO_8-CO_2-H_2O, which has particular application to the origin of carbonatitic and kimberlitic magmas. In light of the accumulating evidence for CO_2 in various forms within the upper mantle and of its effect on magmatic processes, analysis of the melting relations in this system is of considerable importance.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0016-7037(75)90183-0DOIArticle
http://www.sciencedirect.com/science/article/pii/0016703775901830PublisherArticle
Alternate Title:Subsolidus and melting relationships for calcite, magnesite and the join CaCO3-MgCO3 to 36 kb
Additional Information:© 1975 Elsevier Ltd. This research was supported by the Earth Sciences Section, National Science Foundation, NSF Grant GA-32266X. We would like to acknowledge also the general support of the Materials Research Laboratory by the National Science Foundation. We thank R. C. NETVTON for helpful discussion on experimental techniques, and J. R. GOLDSMITH and D. H. EGGLER for reviews of the manuscript.
Funders:
Funding AgencyGrant Number
NSFGA-32266X
Record Number:CaltechAUTHORS:20160120-144703664
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160120-144703664
Official Citation:Anthony J Irving, Peter J Wyllie, Subsolidus and melting relationships for calcite, magnesite and the join CaCO3-MgCO3 36 kb, Geochimica et Cosmochimica Acta, Volume 39, Issue 1, 1975, Pages 35-53, ISSN 0016-7037, http://dx.doi.org/10.1016/0016-7037(75)90183-0. (http://www.sciencedirect.com/science/article/pii/0016703775901830)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63806
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:21 Jan 2016 19:32
Last Modified:21 Jan 2016 19:32

Repository Staff Only: item control page