Bibliographic Citation
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Title | Uranium- and thorium-rich vesuvianite from the Seward Peninsula, Alaska |
Creator/Author | Himmelberg, G.R. (Univ. of Missouri, Columbia) ; Miller, T.P. |
Publication Date | 1980 Sep 01 |
OSTI Identifier | OSTI ID: 6623052 |
Other Number(s) | CODEN: AMMIA |
Resource Type | Journal Article |
Resource Relation | Am. Mineral. ; Vol/Issue: 65:9, 10 |
Subject | 050100 -- Nuclear Fuels-- Reserves, Exploration, & Mining ;580300 -- Mineralogy, Petrology, & Rock Mechanics-- (-1989); ;ALASKA-- URANIUM DEPOSITS;VESUVIANITE-- CHEMICAL COMPOSITION;VESUVIANITE-- PETROGENESIS; GEOLOGY;SYENITES |
Related Subject | GEOLOGIC DEPOSITS;IGNEOUS ROCKS;MATERIALS;MINERAL RESOURCES;MINERALS;NORTH AMERICA;PACIFIC NORTHWEST REGION;PLUTONIC ROCKS;RADIOACTIVE MATERIALS;RADIOACTIVE MINERALS;RESOURCES;ROCKS;URANIUM MINERALS;USA |
Description/Abstract | Vesuvianite rich in U, Th, and REE occurs in a syenite and nepheline syenite in southeastern 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 (metamict) core and an anisotropic (non-metamict) rim.^The chemical composition can be approximated by the formula (Ca,Na,La,Ce,Pr,Nd,U,Th)/sub 18/ /sub 1/(Al, Ti, Fe, Mn, Mg)/sub 12/ /sub 9/Si/sub 18/(O, OH, F)/sub 76/ UO/sub 2/ content ranges from 0.39 (non-metamict) to 0.84 weight percent (metamict), and ThO/sub 2/ ranges from 0.72 (non-metamict) to 2.70 weight percent.^Coexisting allanite has UO/sub 2/ and ThO/sub 2/ 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. |
Country of Publication | United States |
Language | English |
Format | Pages: 1020-1025 |
System Entry Date | 2001 May 13 |
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