Kyanite-garnet-bearing Cambrian rocks and Grenville granulites from the Ayer's Cliff, Quebec, Canada, lamprophyre dike suite: Deep crustal fragments from the northern Appalachians

Research Article| July 01, 1989 Kyanite-garnet-bearing Cambrian rocks and Grenville granulites from the Ayer's Cliff, Quebec, Canada, lamprophyre dike suite: Deep crustal fragments from the northern Appalachians Walter E. Trzcienski, Jr.; Walter E. Trzcienski, Jr. 1Département de Géologie, Université de Montréal, C.P. 6128, Succursale "A," Montréal, Québec H3A 3J7, Canada Search for other works by this author on: GSW Google Scholar Nathalie Marchildon Nathalie Marchildon 1Département de Géologie, Université de Montréal, C.P. 6128, Succursale "A," Montréal, Québec H3A 3J7, Canada Search for other works by this author on: GSW Google Scholar Geology (1989) 17 (7): 637–640. https://doi.org/10.1130/0091-7613(1989)017<0637:KGBCRA>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Walter E. Trzcienski, Nathalie Marchildon; Kyanite-garnet-bearing Cambrian rocks and Grenville granulites from the Ayer's Cliff, Quebec, Canada, lamprophyre dike suite: Deep crustal fragments from the northern Appalachians. Geology 1989;; 17 (7): 637–640. doi: https://doi.org/10.1130/0091-7613(1989)017<0637:KGBCRA>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyGeology Search Advanced Search Abstract Granulite facies metamorphic xenoliths have been found in several Monteregian-age lamprophyric dikes at Ayer's Cliff, Quebec, Canada. From geothermobarometric calculations,it is shown that middle to lower crustal metapelitic assemblages formed at 700-800 °C and 8-10 kbar, whereas mafic assemblages formed near 1200 ±100 °C and 14 ±1 kbar. The metapelitic assemblages are interpreted as Cambrian metasediments similar to those found farther south in Vermont. The mafic assemblages are interpreted as Grenville basement. The occurrence of these lithologies at Ayer's Cliff and in similar dikes in Vermont confirms the seismic interpretation of Grenville basement beneath a large part of the western Appalachians in southern Quebec and northern New England. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not currently have access to this article.