| Reference Type | Journal (article/letter/editorial) |
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| Title | The Assemblage Quartz–K Feldspar–Biotite–Garnet–Sillimanite as an Indicator of –T Conditions |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Froese, E. | Author |
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| Year | 1973 (October 1) | Volume | 10 |
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| Issue | 10 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e73-149Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 473527 | Long-form Identifier | mindat:1:5:473527:8 |
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| GUID | 0 |
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| Full Reference | Froese, E. (1973) The Assemblage Quartz–K Feldspar–Biotite–Garnet–Sillimanite as an Indicator of –T Conditions. Canadian Journal of Earth Sciences, 10 (10) 1575-1579 doi:10.1139/e73-149 |
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| Plain Text | Froese, E. (1973) The Assemblage Quartz–K Feldspar–Biotite–Garnet–Sillimanite as an Indicator of –T Conditions. Canadian Journal of Earth Sciences, 10 (10) 1575-1579 doi:10.1139/e73-149 |
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| In | (1973, October) Canadian Journal of Earth Sciences Vol. 10 (10) Canadian Science Publishing |
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| Abstract/Notes | The assemblage quartz–K feldspar–biotite–garnet–sillimanite is common in high-grade pelitic rocks. Diverse compositions of biotite and garnet from this assemblage reflect differences in Ptotal, [Formula: see text], and T. For rocks from a small area, Ptotal probably was nearly constant. In order to show the separate effects of [Formula: see text] and of T on mineral composition, a plot of conditions indicated by various rocks with this mineral assemblage on a [Formula: see text]–T diagram is presented. This is accomplished by treating the minerals and the fluid phase as ideal solutions, by assigning reasonable [Formula: see text]–T values to one rock, and by assuming entropies for two dehydration reactions. Rocks from the Thor-Odin gneiss dome in British Columbia reflect a temperature range of about 200 °C and relatively low water pressures. |
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