Experimentally determined solidi in the Ca-bearing granite system NaAlSi3O8-CaAl2Si2O8-KAlSi3O8-SiO2-H2O-CO2
American Mineralogist
By: S.R. Bohlen, J.O. Eckert Jr., and W.B. Hankins
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Abstract
The phase relationships of melting of synthetic granite in the presence of an H2O-CO2 fluid were determined. These results provide constraints on the maximum temperatures of regional metamorphism attainable in vapor-saturated metapelitic and quartzofeldspathic rocks that escaped widespread melting. At pressures below 10 kbar, a fluid phase of XH2O = 0.75, 0.5, and 0.25 limits temperatures to below ~700-725, ~800-825, and ~850-875??C, respectively. As a consequence, the formation of granulite does not require CO2 concentrations in a coexisting fluid to exceed an XCO2 of 0.25-0.5. -from Authors
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Experimentally determined solidi in the Ca-bearing granite system NaAlSi3O8-CaAl2Si2O8-KAlSi3O8-SiO2-H2O-CO2 |
| Series title | American Mineralogist |
| Volume | 80 |
| Issue | 7-8 |
| Year Published | 1995 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | American Mineralogist |
| First page | 752 |
| Last page | 756 |