| Reference Type | Journal (article/letter/editorial) |
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| Title | Extrusive carbonatites: their origins reappraised in the light of new experimental data |
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| Journal | Geological Magazine |
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| Authors | Gittins, John | Author |
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| Jago, Bruce C. | Author |
| Year | 1991 (July) | Volume | 128 |
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| Issue | 4 |
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| Publisher | Cambridge University Press (CUP) |
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| DOI | doi:10.1017/s001675680001757xSearch in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 255084 | Long-form Identifier | mindat:1:5:255084:2 |
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| GUID | 0 |
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| Full Reference | Gittins, John, Jago, Bruce C. (1991) Extrusive carbonatites: their origins reappraised in the light of new experimental data. Geological Magazine, 128 (4) 301-305 doi:10.1017/s001675680001757x |
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| Plain Text | Gittins, John, Jago, Bruce C. (1991) Extrusive carbonatites: their origins reappraised in the light of new experimental data. Geological Magazine, 128 (4) 301-305 doi:10.1017/s001675680001757x |
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| In | (1991, July) Geological Magazine Vol. 128 (4) Cambridge University Press (CUP) |
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| Abstract/Notes | AbstractCalcite-rich carbonatites are commonly attributed to calcitization of alkalic carbonatite of Oldoinyo Lengai type. The interpretation arises from the presumption that magmatic crystallization of calcite at atmospheric pressure is not possible. We show that only a small percentage of fluorine, a common element in carbonatite magmas, permits such crystallization, and we argue that most of the calcite in extrusive carbonatites is magmatic. The presence of any more than minor apatite precludes an alkalic carbonatite parentage. While not denying that calcification of alkalic carbonatite can occur, we suggest that it is not generally responsible for the formation of extrusive calcific carbonatites. |
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