| Reference Type | Journal (article/letter/editorial) |
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| Title | Alkali-deficient tourmaline from the Sullivan Pb-Zn-Ag deposit, British Columbia |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Jiang, Shao-Yong | Author |
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| Palmer, Martin R. | Author |
| Slack, John F. | Author |
| Year | 1997 (December) | Volume | 61 |
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| Issue | 409 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_61/61-409-853.pdf+ |
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| DOI | doi:10.1180/minmag.1997.061.409.08Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 231 | Long-form Identifier | mindat:1:5:231:2 |
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| GUID | 0 |
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| Full Reference | Jiang, Shao-Yong, Palmer, Martin R., Slack, John F. (1997) Alkali-deficient tourmaline from the Sullivan Pb-Zn-Ag deposit, British Columbia. Mineralogical Magazine, 61 (409) 853-860 doi:10.1180/minmag.1997.061.409.08 |
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| Plain Text | Jiang, Shao-Yong, Palmer, Martin R., Slack, John F. (1997) Alkali-deficient tourmaline from the Sullivan Pb-Zn-Ag deposit, British Columbia. Mineralogical Magazine, 61 (409) 853-860 doi:10.1180/minmag.1997.061.409.08 |
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| In | (1997, December) Mineralogical Magazine Vol. 61 (409) Mineralogical Society |
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| Abstract/Notes | AbstractAlkali-deficient tourmalines are found in albitized rocks from the hanging-wall of the Sullivan Pb-Zn-Ag deposit (British Columbia, Canada). They approximate the Mg-equivalent of foitite with an idealized formula â–¡(Mg2Al)Al6Si6O18(BO3)3(OH)4. Major chemical substitutions in the tourmalines are the alkali-defect type [Na*(x) + Mg*(Y) = â–¡(x) + Al(Y)] and the uvite type [Na*(x) + Al(Y) = Ca(x) + Mg*(Y)], where Na* = Na + K, Mg* = Mg + Fe + Mn. The occurrence of these alkali-deficient tourmalines reflects a unique geochemical environment that is either alkali-depleted overall or one in which the alkalis preferentially partitioned into coexisting minerals (e.g. albite).Some of the alkali-deficient tourmalines have unusually high Mn contents (up to 1.5 wt.% MnO) compared to other Sullivan tourmalines. Manganese has a strong preference for incorporation into coexisting garnet and carbonate at Sullivan, thus many tourmalines in Mn-rich rocks are poor in Mn (<0.2 wt.% MnO). It appears that the dominant controls over the occurrence of Mn-rich tourmalines at Sullivan are the local availability of Mn and the lack of other coexisting minerals that may preferentially incorporate Mn into their structures. |
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