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Crustal structure of the Grenville front and adjacent terranes

1988; Geological Society of America; Volume: 16; Issue: 9 Linguagem: Inglês

10.1130/0091-7613(1988)016 2.3.co;2

1943-2682

A. G. Green, B. Milkereit, A Davidson, Carl Spencer, D. R. Hutchinson, William F. Cannon, M. W. Lee, W.F. Agena, John C. Behrendt, William J. Hinze,

Geology and Paleoclimatology Research

Research Article| September 01, 1988 Crustal structure of the Grenville front and adjacent terranes A. G. Green; A. G. Green 1Geological Survey of Canada, Ottawa, Ontario K1A OY3, Canada Search for other works by this author on: GSW Google Scholar B. Milkereit; B. Milkereit 1Geological Survey of Canada, Ottawa, Ontario K1A OY3, Canada Search for other works by this author on: GSW Google Scholar A. Davidson; A. Davidson 1Geological Survey of Canada, Ottawa, Ontario K1A OY3, Canada Search for other works by this author on: GSW Google Scholar C. Spencer; C. Spencer 1Geological Survey of Canada, Ottawa, Ontario K1A OY3, Canada Search for other works by this author on: GSW Google Scholar D. R. Hutchinson; D. R. Hutchinson 2U.S. Geological Survey, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar W. F. Cannon; W. F. Cannon 3U.S. Geological Survey, Reston, Virginia 22092 Search for other works by this author on: GSW Google Scholar M. W. Lee; M. W. Lee 4U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar W. F. Agena; W. F. Agena 4U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar J. C. Behrendt; J. C. Behrendt 4U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar W. J. Hinze W. J. Hinze 5Purdue University, West Lafayette, Indiana 47906 Search for other works by this author on: GSW Google Scholar Author and Article Information A. G. Green 1Geological Survey of Canada, Ottawa, Ontario K1A OY3, Canada B. Milkereit 1Geological Survey of Canada, Ottawa, Ontario K1A OY3, Canada A. Davidson 1Geological Survey of Canada, Ottawa, Ontario K1A OY3, Canada C. Spencer 1Geological Survey of Canada, Ottawa, Ontario K1A OY3, Canada D. R. Hutchinson 2U.S. Geological Survey, Woods Hole, Massachusetts 02543 W. F. Cannon 3U.S. Geological Survey, Reston, Virginia 22092 M. W. Lee 4U.S. Geological Survey, Denver, Colorado 80225 W. F. Agena 4U.S. Geological Survey, Denver, Colorado 80225 J. C. Behrendt 4U.S. Geological Survey, Denver, Colorado 80225 W. J. Hinze 5Purdue University, West Lafayette, Indiana 47906 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1988) 16 (9): 788–792. https://doi.org/10.1130/0091-7613(1988)016 2.3.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 A. G. Green, B. Milkereit, A. Davidson, C. Spencer, D. R. Hutchinson, W. F. Cannon, M. W. Lee, W. F. Agena, J. C. Behrendt, W. J. Hinze; Crustal structure of the Grenville front and adjacent terranes. Geology 1988;; 16 (9): 788–792. doi: https://doi.org/10.1130/0091-7613(1988)016 2.3.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 Under the auspices of the Great Lakes International Multidisciplinary Program on Crustal Evolution, approximately 320 km of deep seismic reflection data were collected in Lake Huron along a profile that extends east from the Manitoulin terrane across the Grenville front to the interior of the Grenville orogen. The Manitoulin terrane is characterized by a series of gently east-dipping reflections at about 20 km depth that separate a highly reflective lower crustal layer from a markedly less reflective upper layer. Imaged by strong reflections at the western end of a spectacular band of moderately east-dipping reflections, the Grenville front clearly truncates Manitoulin terrane structures to the west. These data are interpreted in terms of a speculative two-stage model involving (1) creation of a major decollement during northward collision of an allochthonous terrane with the southern Superior cratonic margin (1.83-1.89 Ga; Penokean orogeny) and (2) northwest-directed stacking of microterranes at the southeastern margin of the craton, followed by crust-penetrating ductile imbrication under high-pressure-high-temperature conditions leading to the ramping of deeply buried rocks to the near surface (1.0-1.3 Ga; Grenvillian orogeny). This content is PDF only. Please click on the PDF icon to access. 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.