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首页> 美国政府科技报告 >Preliminary Report of the Uranium Favorability of Shear Zones in the Crystalline Rocks of the Southern Appalachians
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Preliminary Report of the Uranium Favorability of Shear Zones in the Crystalline Rocks of the Southern Appalachians

机译：阿巴拉契亚南部结晶岩中剪切带铀有利性的初步报告

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Three sheared areas in the crystalline Piedmont and Blue Ridge provinces, from which uranium occurrences or anomalous radioactivity have been reported, were studied to determine their favorability for uranium mineralization. The study, which involved a literature review, geologic reconnaissance, ground radiometric surveys, and sampling of rock outcrops for petrographic and chemical analyses, indicates that more-detailed investigations of these and similar areas are warranted. In each area, surface leaching and deep residual cover make it difficult to assess the potential for uranium mineralization on the basis of results from chemical analyses for U sub 3 O sub 8 and the radiometric surveys. Although anomalous radioactivity and anomalous chemical uranium values were noted in only a few rock exposures and samples from the shear zones, the potential for uranium mineralization at depth could be much greater than indicated by these surface data. The study indicates that shear zones within Precambiran granitic basement complexes (such as the Wilson Creek Gneiss of western North Carolina, the Cranberry Gneiss of eastern Tennessee, and the Toxaway Gneiss of western South Carolina) are favorable as hosts for uranium and may contain subsurface deposits. Mylonitized graphitic schists immediately north of the Towaliga fault in Alabama and Georgia may be favorable host rocks for uranium. (ERA citation 04:012529)

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