| Reference Type | Journal (article/letter/editorial) |
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| Title | Narsarsukite from Sage Creek, Sweetgrass Hills, Montana |
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| Journal | American Mineralogist |
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| Authors | Stewart, D. B. | Author |
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| Year | 1959 | Volume | 44 |
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| Issue | 3-4 |
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| Publisher | Mineralogical Society of America |
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| Download URL | http://www.minsocam.org/ammin/AM44/AM44_265.pdf+ |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 523172 | Long-form Identifier | mindat:1:5:523172:4 |
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| GUID | 0 |
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| Full Reference | Stewart, D. B. (1959) Narsarsukite from Sage Creek, Sweetgrass Hills, Montana. American Mineralogist, 44 (3-4) 265-273 |
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| Plain Text | Stewart, D. B. (1959) Narsarsukite from Sage Creek, Sweetgrass Hills, Montana. American Mineralogist, 44 (3-4) 265-273 |
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| In | (1959) American Mineralogist Vol. 44 (3-4) Mineralogical Society of America |
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| Abstract/Notes | Narsarsukite, Na2TiSi4O11, is described from the second of three localities in the Sweetgrass Hills, Montana. Narsarsukite is associated with manganpectolite, quartz, calcite, and galena in veins cutting an orthoclase-albite-aegirine-quartz hybrid rock in a zone adjacent to a syenite stock. Optical properties of the minerals and an indexed r-ray powder-diffraction pattern of narsarsukite are given.
This occurrence of the assemblage aegirine-quartz-narsarsukite is similar to other occurrences of narsarsukite in the Sweetgrass Hills and at Narsarsuk, Greenland. It is concluded that the formation of narsarsukite depends upon the reaction of emanations from alkalic magmas with siliceous wallrock under conditions such that a high partial pressure of oxygen is present. |
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