| Reference Type | Journal (article/letter/editorial) |
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| Title | Rhönite paragenesis in pyroxenite xenoliths, Mount Sidley volcano, Marie Byrd Land, West Antarctica |
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| Journal | Mineralogical Magazine |
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| Authors | Grapes, R. H. | Author |
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| Wysoczanski, R. J. | Author |
| Hoskin, P. W. O. | Author |
| Year | 2003 (August) | Volume | 67 |
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| Page(s) | 639-651 | Issue | 4 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/0026461036740123Search in ResearchGate |
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| Mindat Ref. ID | 243453 | Long-form Identifier | mindat:1:5:243453:1 |
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| GUID | d5032b48-a875-4f71-bbd5-64150d123832 |
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| Full Reference | Grapes, R. H., Wysoczanski, R. J., Hoskin, P. W. O. (2003) Rhönite paragenesis in pyroxenite xenoliths, Mount Sidley volcano, Marie Byrd Land, West Antarctica. Mineralogical Magazine, 67 (4) 639-651 doi:10.1180/0026461036740123 |
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| Plain Text | Grapes, R. H., Wysoczanski, R. J., Hoskin, P. W. O. (2003) Rhönite paragenesis in pyroxenite xenoliths, Mount Sidley volcano, Marie Byrd Land, West Antarctica. Mineralogical Magazine, 67 (4) 639-651 doi:10.1180/0026461036740123 |
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| Abstract/Notes | AbstractRhönite occurs in lower crustal pyroxenite xenoliths erupted in phonolite from the Mount Sidley composite volcano, Marie Byrd Land, Antarctica, as a localized breakdown product, with plagioclase, clinopyroxene, ± olivine ± Ti-magnetite + melt, of kaersutite, and as microphenocrysts (with olivine, plagioclase, clinopyroxene) in pockets of basanitic melt. Rhö nite after kaersutite has a more NaSi-rich/ CaAl-poor composition, lower Ti, and formed at higher oxidation (∼NNO) conditions than rhönite occurring as microphenocrysts in basanite. Comparison with experimentally determined rhönite stability in understaturated alkali basalt and as a reaction product after Ti-amphibole indicates that the Mount Sidley rhönite (and associated minerals) formed between 1090 and 1190°C at <0.5 kbar, presumably during temporary residence of the xenoliths in a shallow magma chamber below the volcanic edifice. |
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