Granitic Pegmatites as Reflections of Their Sources

Research Article| August 01, 2012 Granitic Pegmatites as Reflections of Their Sources Petr Černý; Petr Černý 1Department of Geological Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, CanadaE-mail: pcerny@umanitoba. ca Search for other works by this author on: GSW Google Scholar David London; David London 2ConocoPhillips School of Geology Granitic Pegmatites as Reflections of Their Sources. Elements 2012;; 8 (4): 289–294. doi: https: //doi. org/10. 2113/gselements. 8. 4. 289 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyElements Search Advanced Search Abstract Pegmatites accentuate the trace element signatures of their granitic sources. Through that signature, the origin of pegmatites can commonly be ascribed to granites whose own source characteristics are known and distinctive. Interactions with host rocks that might modify the composition of pegmatites are limited by the rapid cooling and low heat content of pegmatite-forming magmas. The trace element signatures of most pegmatites clearly align with those of S-type (sedimentary source, mostly postcollisional tectonic environment) and A-type (anorogenic environment, lower continental crust ± mantle source) granites. Pegmatites are not commonly associated with I-type (igneous source) granites. The distinction between granites that spawn pegmatites and those that do not appears to depend on the presence or absence, respectively, of fluxing components, such as B, P, and F, in addition to H2O, at the source. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.