Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska
Vesuvianite rich in U, Th, and REE occurs in a syenite and nepheline syenite in south-eastern Seward Peninsula, Alaska. The vesuvianite occurs as large (up to 1.5 cm) tabular crystals; in thin section it is brownish-yellow and commonly zoned with an isotropic (meta-mict) core and an anisotropic (non...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.505.3214 2023-05-15T18:19:18+02:00 Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska Gibn R. Hnrauelnnnc U. S. Geological Survey Nno Tnouas P. Miller The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.505.3214 http://rruff.info/doclib/am/vol65/AM65_1020.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.505.3214 http://rruff.info/doclib/am/vol65/AM65_1020.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://rruff.info/doclib/am/vol65/AM65_1020.pdf text ftciteseerx 2016-01-08T09:20:39Z Vesuvianite rich in U, Th, and REE occurs in a syenite and nepheline syenite in south-eastern Seward Peninsula, Alaska. The vesuvianite occurs as large (up to 1.5 cm) tabular crystals; in thin section it is brownish-yellow and commonly zoned with an isotropic (meta-mict) core and an anisotropic (non-metamict) rim. The chemical composition can be approxi-mated by the formula (Ca,Na,La,Ce,Pr,Nd,U,Th)re r(Al,Ti,Fe,Mn,Mg)t2 rSi,6(O,OH,F)t6. UO, content ranges from 0.39 (non-metamict) to 0.84 weight perc€nt (metamict), and ThOt ranges from 0.72 (non-metamict) to 2.70 weight percent. Coexisting allanite has UO, and ThO2 contents that range from 0.29 to 0.40 and 0.77 to 1.30 weight percents, respectively. The vesuvianite probably formed by metasomatic activity prior to intrusion of subsilicic alkaline dikes. Text Seward Peninsula Alaska Unknown |
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English |
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Vesuvianite rich in U, Th, and REE occurs in a syenite and nepheline syenite in south-eastern Seward Peninsula, Alaska. The vesuvianite occurs as large (up to 1.5 cm) tabular crystals; in thin section it is brownish-yellow and commonly zoned with an isotropic (meta-mict) core and an anisotropic (non-metamict) rim. The chemical composition can be approxi-mated by the formula (Ca,Na,La,Ce,Pr,Nd,U,Th)re r(Al,Ti,Fe,Mn,Mg)t2 rSi,6(O,OH,F)t6. UO, content ranges from 0.39 (non-metamict) to 0.84 weight perc€nt (metamict), and ThOt ranges from 0.72 (non-metamict) to 2.70 weight percent. Coexisting allanite has UO, and ThO2 contents that range from 0.29 to 0.40 and 0.77 to 1.30 weight percents, respectively. The vesuvianite probably formed by metasomatic activity prior to intrusion of subsilicic alkaline dikes. |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
author |
Gibn R. Hnrauelnnnc U. S. Geological Survey Nno Tnouas P. Miller |
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Gibn R. Hnrauelnnnc U. S. Geological Survey Nno Tnouas P. Miller Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska |
author_facet |
Gibn R. Hnrauelnnnc U. S. Geological Survey Nno Tnouas P. Miller |
author_sort |
Gibn R. Hnrauelnnnc |
title |
Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska |
title_short |
Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska |
title_full |
Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska |
title_fullStr |
Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska |
title_full_unstemmed |
Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska |
title_sort |
uranium- and thorium-rich vesuvianite from the seward peninsula, alaska |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.505.3214 http://rruff.info/doclib/am/vol65/AM65_1020.pdf |
genre |
Seward Peninsula Alaska |
genre_facet |
Seward Peninsula Alaska |
op_source |
http://rruff.info/doclib/am/vol65/AM65_1020.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.505.3214 http://rruff.info/doclib/am/vol65/AM65_1020.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766196372427505664 |