| Abstract: | The McAllister Sn-Ta deposit (Alabama) is localized in a complex pegmatite that contains large zones of mineralized late-stage replacement-type saccharoidal albite and nearly monomineralic muscovite ‘greisen-like‘ pipes. The dyke is at least 450 m long and averages approximately 9 m in thickness. At least two ‘greisen-like‘ pipes, as much as 7.6 m by 4.5 m in cross-section and extending at least 76 m down a steep easterly pitch, occur near the center of the dyke. The dyke is hosted by an approximately 300-Ma-old pluton of a group referred to as the Rockford Granite, a mesozonal to epizonal two-mica, peraluminous tin-bearing granite. The pluton is genetically affiliated with a well-defined sequence of simple to complex pegmatite dykes and quartz-casiterite veins that occur near its margin and within the immediately adjacent metasedimentary rocks of the Wedowee Group. |
| Genre: | Article |
| ProdID: | 70015654 |
| Citation Author: | Foord, Eugene, E.; Cook, Robert, B. |
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| Citation End Page: | 105 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Mineralogist |
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| Citation Number Of Pages: | 13 |
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| Citation Search Results Text: | Mineralogy and paragenesis of the McAllister Sn-Ta-bearing pegmatite, Coosa County, Alabama; 1989; Article; Journal; Canadian Mineralogist; Foord, Eugene, E.; Cook, Robert, B. |
| Citation Start Page: | 93 |
| Citation Volume: | 27 pt 1 |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Mineralogy and paragenesis of the McAllister Sn-Ta-bearing pegmatite, Coosa County, Alabama; 1989; Article; Journal; Canadian Mineralogist; Foord, Eugene, E.; Cook, Robert, B. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1989 00:00 -0600 |
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