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40Ar/39Ar ages for plutons of the Monteregian Hills, Quebec: Evidence for a single episode of Cretaceous magmatism
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1986
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VolcanologyEngineeringOhio State UniversityEarth ScienceRegional GeologyCretaceous PeriodMonteregian HillsGeological DataGeochronologyOhio 43210Cretaceous MagmatismGeologyMineral DepositSingle EpisodeStructural GeologyHistory Of GeologyExploration GeologyEconomic GeologyEarth SciencesGeochemistryAstrochronologyPetrology
Research Article| August 01, 1986 40Ar/39Ar ages for plutons of the Monteregian Hills, Quebec: Evidence for a single episode of Cretaceous magmatism K. A. FOLAND; K. A. FOLAND 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar LISA A. GILBERT; LISA A. GILBERT 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar CHERYL A. SEBRING; CHERYL A. SEBRING 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar CHEN JIANG-FENG CHEN JIANG-FENG 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar Author and Article Information K. A. FOLAND 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 LISA A. GILBERT 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 CHERYL A. SEBRING 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 CHEN JIANG-FENG 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1986) 97 (8): 966–974. https://doi.org/10.1130/0016-7606(1986)97<966:AAFPOT>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation K. A. FOLAND, LISA A. GILBERT, CHERYL A. SEBRING, CHEN JIANG-FENG; 40Ar/39Ar ages for plutons of the Monteregian Hills, Quebec: Evidence for a single episode of Cretaceous magmatism. GSA Bulletin 1986;; 97 (8): 966–974. doi: https://doi.org/10.1130/0016-7606(1986)97<966:AAFPOT>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 SocietyGSA Bulletin Search Advanced Search Abstract 40Ar/39Ar data for biotite and amphibole from six plutonic complexes of the Monteregian petrographic province in Quebec, Canada, are presented. Generally uncomplicated and concordant incremental heating spectra are observed, although there is evidence for minor excess 40Ar at several localities. Biotites and amphiboles are concordant, consistent with rapid cooling of the high-level complexes. Ages for different phases of individual complexes are analytically indistinguishable and suggest that the various principal lithologies are cogenetic. The 40Ar/39Ar ages of six Monteregian complexes (St. Hilaire, Rougemont, Johnson, Shefford, Brome, Megantic) all fall within the very restricted range of 124 ± 1 m.y. It is suggested that all of the Monteregian plutons, with the exception of Oka, were formed within a short interval (1–2 m.y.) during the Cretaceous, consistent with paleomagmetic results. The new ages, along with geochemical characteristics, support derivation of the alkaline magmas by a fixed mantle hot spot which also produced broadly similar complexes in New England and the chain of New England Seamounts. 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.