Metamorphic conditions during formation of a metapelitic sillimanite-garnet gneiss from Clemence Massif, Prince Charles Mountains, East Antarctica
Open-File Report
2007-1047-SRP-062
By: A.F. Corvino, S.D. Boger, and C.J.L. Wilson
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Abstract
The pressure (P) and temperature (T) conditions during metamorphism of a metapelitic sillimanite-garnet
gneiss from Clemence Massif, Antarctic Prince Charles Mountains, are estimated using mineral abundance information
and petrogenetic P–T pseudosections computed in the chemical system MnO–N2O–CaO–K2O–FeO–MgO–Al2O3–
SiO2–H2O–TiO2–Fe2O3 (MnNCKFMASHTO). Calculated mineral equilibria for the appropriate bulk composition predict that the observed assemblage, of K-feldspar–garnet–quartz–sillimanite–biotite–ilmenite–rutile, stabilised at
approximately 8–9 kbar and 760–790ºC. Reaction microstructures are rare, but the preservation of relic spinel
inclusions in garnet indicates an earlier low-P, high-T component and possible anticlockwise path.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Metamorphic conditions during formation of a metapelitic sillimanite-garnet gneiss from Clemence Massif, Prince Charles Mountains, East Antarctica |
| Series title | Open-File Report |
| Series number | 2007-1047-SRP-062 |
| DOI | 10.3133/ofr20071047SRP062 |
| Year Published | 2007 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 9 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007 |
| Other Geospatial | Antarctica;Prince Charles Mountains |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |