| Reference Type | Journal (article/letter/editorial) |
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| Title | Plagioclase–clinopyroxene–garnet–quartz equilibria and the geobarometry and geothermometry of garnet amphibolites from Mica Creek, British Columbia |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Ghent, Edward D. | Author |
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| Stout, Mavis Z. | Author |
| Raeside, Robert P. | Author |
| Year | 1983 (May 1) | Volume | 20 |
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| Issue | 5 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e83-063Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 477883 | Long-form Identifier | mindat:1:5:477883:1 |
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| GUID | 0 |
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| Full Reference | Ghent, Edward D., Stout, Mavis Z., Raeside, Robert P. (1983) Plagioclase–clinopyroxene–garnet–quartz equilibria and the geobarometry and geothermometry of garnet amphibolites from Mica Creek, British Columbia. Canadian Journal of Earth Sciences, 20 (5) 699-706 doi:10.1139/e83-063 |
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| Plain Text | Ghent, Edward D., Stout, Mavis Z., Raeside, Robert P. (1983) Plagioclase–clinopyroxene–garnet–quartz equilibria and the geobarometry and geothermometry of garnet amphibolites from Mica Creek, British Columbia. Canadian Journal of Earth Sciences, 20 (5) 699-706 doi:10.1139/e83-063 |
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| In | (1983, May) Canadian Journal of Earth Sciences Vol. 20 (5) Canadian Science Publishing |
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| Abstract/Notes | Metabasites form a small but significant volume of the Upper Precambrian Horsethief Creek Group near Mica Creek, British Columbia. Sillimanite zone assemblages in metabasites are: hornblende–plagioclase–ilmenite ± quartz ± garnet ± clinopyroxene ± sphene ± calcite. The incoming of garnet–clinopyroxene in metabasites very nearly coincides with the kyanite–sillimanite isograd. Fe–Mg distributions between coexisting garnet and clinopyroxene suggest a temperature range of 650–705 °C (Ellis and Green calibration). The higher temperature estimates disagree with the upper thermal stability limits of muscovite–plagioclase–quartz–sillimanite from adjacent pelitic rocks. Pressure estimates based upon clinopyroxene–garnet–plagioclase–quartz equilibria are 5.6 ± 0.3 and 7.2 ± 0.3 kbar (560 ± 30 and 720 ± 30 MPa), respectively, using two different calibrations of this geobarometer. These estimates bracket the pressure estimated from garnet–plagioclase–Al2SiO5 equilibria in pelitic rocks. |
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