An inner Cordilleran belt of muscovite-bearing plutons

Research Article| September 01, 1980 An inner Cordilleran belt of muscovite-bearing plutons Calvin F. Miller; Calvin F. Miller 1Department of Geology, Vanderbilt University, Nashville, Tennessee 37235 Search for other works by this author on: GSW Google Scholar Larry J. Bradfish Larry J. Bradfish 2Department of Geosciences, University of Arizona, Tucson, Arizona 85719 Search for other works by this author on: GSW Google Scholar Geology (1980) 8 (9): 412–416. https://doi.org/10.1130/0091-7613(1980)8<412:AICBOM>2.0.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Calvin F. Miller, Larry J. Bradfish; An inner Cordilleran belt of muscovite-bearing plutons. Geology 1980;; 8 (9): 412–416. doi: https://doi.org/10.1130/0091-7613(1980)8<412:AICBOM>2.0.CO;2 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 SocietyGeology Search Advanced Search Abstract Muscovite-bearing granitic rocks, rare in the great coastal batholiths of the western margin of North America, are common in an inland belt that stretches from Sonora to British Columbia. Compositional characteristics of these inland plutons (strongly peraluminous, high 87Sr/86Sr) ally them with the S-type granitoids, whereas the coastal batholiths are best described as I-type. Although a simple S-type origin by anatexis of metasediment is not required, compositions of these plutons imply a far greater contribution from ancient crustal material than do those of marginal batholiths. The distinction between margin and inner Cordillera in nature of plutonism suggests important regional differences in magmagenic processes; these differences must have been a function of variations in composition of and/or conditions in the preexisting crust. It is noteworthy that the muscovite-bearing belt is located at the edge of inferred Precambrian crust and generally corresponds to areas of intense deformation and regional metamorphism of Mesozoic through early Cenozoic time. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.