The extent of juvenile crust in the Grenville Province: Nd isotope evidence
Notice bibliographique
Résumé
Research Article| May 01, 2010 The extent of juvenile crust in the Grenville Province: Nd isotope evidence A.P. Dickin; A.P. Dickin † School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4M1, Canada †E-mail: dickin@mcmaster.ca Search for other works by this author on: GSW Google Scholar R.H. McNutt; R.H. McNutt School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4M1, Canada Search for other works by this author on: GSW Google Scholar C. Martin; C. Martin School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4M1, Canada Search for other works by this author on: GSW Google Scholar A. Guo A. Guo * School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4M1, Canada *Present address: State Key Laboratory of Continental Dynamics and Department of Geology, Northwest University, Xian 710069, China Search for other works by this author on: GSW Google Scholar Author and Article Information A.P. Dickin † School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4M1, Canada R.H. McNutt School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4M1, Canada C. Martin School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4M1, Canada A. Guo * School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4M1, Canada †E-mail: dickin@mcmaster.ca *Present address: State Key Laboratory of Continental Dynamics and Department of Geology, Northwest University, Xian 710069, China Publisher: Geological Society of America Received: 02 Dec 2007 Revision Received: 04 May 2009 Accepted: 28 May 2009 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2010 Geological Society of America GSA Bulletin (2010) 122 (5-6): 870–883. https://doi.org/10.1130/B26381.1 Article history Received: 02 Dec 2007 Revision Received: 04 May 2009 Accepted: 28 May 2009 First Online: 08 Mar 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.P. Dickin, R.H. McNutt, C. Martin, A. Guo; The extent of juvenile crust in the Grenville Province: Nd isotope evidence. GSA Bulletin 2010;; 122 (5-6): 870–883. doi: https://doi.org/10.1130/B26381.1 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 A large Nd isotope data set is presented to generate a crustal formation age map for the southwest Grenville Province, placing it in the context of the province as a whole. Previous studies have shown that most crust in the central and eastern parts of the province is pre-Grenvillian, composed largely of juvenile 1.5, 1.7, 1.9, and 2.7 Ga arc terranes, partly reworked by later ensialic arcs and collision zones. In contrast, new Nd data reported here show that juvenile monocyclic crust is restricted to the SW Grenville Province, in part of the Central Metasedimentary Belt interpreted as a failed backarc rift zone. There is a clear isotopic distinction between this rift zone and the pre-Grenvillian crust on the flanks. On the flanks of the rift zone, there is evidence for two crust-forming events, comprising an earlier (1.5 Ga) juvenile Pinwarian event, and a later 1.4–1.3 Ga continental margin arc (the Elzevirian Orogeny). Based on the geographical distribution of Nd model ages in the SW Grenville Province, a revised tectonic model for the Grenville Orogeny is developed. In this model, backarc spreading created a rift zone behind a (pre-Grenvillian) Elzevirian subduction zone that obliquely straddled the edge of a Mesoproterozoic continental margin. As a result of this geometry, the rift zone died out to the north as it propagated into cold Archean crust. Elzevirian subduction was probably halted by the collision of the continental margin with an offshore arc, and later with a major continental block, giving rise respectively to the Shawinigan and the Ottawan orogenic events. These collisional events can be grouped as parts of the Grenville Orogenic Cycle. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,006 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».