Rb-Sr whole-rock age of the Siloam Granite, Georgia: A Permian intrusive in the southern Appalachians

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作者：
Jones, Lois M. [1 ]
Walker, Raymond L. [2 ]
机构：
[1] Department of Geology, University of Georgia, Athens, GA 30602, United States
[2] Oak Ridge National Laboratory, Oak Ridge, TN 37830, United States
来源：
Bulletin of the Geological Society of America | 1973年 / 84卷 / 11期
关键词：
Binary alloys - Granite - Rubidium alloys;
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摘要：
The Siloam granite crops out in the southern half of Greene County, Georgia, within the Outer Piedmont. The granite is similar to the coarsely porphyritic postmetamorphic granites of the Charlotte Belt of North Carolina and South Carolina. The Rb-Sr whole-rock date of the Siloam granite is 269 ± 3 m.y., making this intrusive the youngest of the southern Appalachian region. Its low initial 87Sr/86Sr ratio of 0.7052 ± 0.0001 suggests an upper mantle affinity with no appreciable crustal contamination during emplacement. © 1973 Geological Society of America.
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页码：3653 / 3658
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