Provenance record of Laurentian passive-margin strata in the northern Caledonides: Implications for paleodrainage and paleogeography
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Résumé
Research Article| July 01, 2007 Provenance record of Laurentian passive-margin strata in the northern Caledonides: Implications for paleodrainage and paleogeography Peter A. Cawood; Peter A. Cawood 1Tectonics Special Research Centre, School of Earth and Geographical Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia Search for other works by this author on: GSW Google Scholar Alexander A. Nemchin; Alexander A. Nemchin 2Western Australian School of Mines, Curtin University, Bentley, WA 6102, Australia Search for other works by this author on: GSW Google Scholar Rob Strachan Rob Strachan 3School of Earth & Environmental Sciences, University of Portsmouth, Portsmouth PO1 3QL, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Peter A. Cawood 1Tectonics Special Research Centre, School of Earth and Geographical Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia Alexander A. Nemchin 2Western Australian School of Mines, Curtin University, Bentley, WA 6102, Australia Rob Strachan 3School of Earth & Environmental Sciences, University of Portsmouth, Portsmouth PO1 3QL, UK Publisher: Geological Society of America Received: 16 Nov 2006 Revision Received: 29 Jan 2007 Accepted: 31 Jan 2007 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2007) 119 (7-8): 993–1003. https://doi.org/10.1130/B26152.1 Article history Received: 16 Nov 2006 Revision Received: 29 Jan 2007 Accepted: 31 Jan 2007 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Peter A. Cawood, Alexander A. Nemchin, Rob Strachan; Provenance record of Laurentian passive-margin strata in the northern Caledonides: Implications for paleodrainage and paleogeography. GSA Bulletin 2007;; 119 (7-8): 993–1003. doi: https://doi.org/10.1130/B26152.1 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 Siliciclastic sequences accumulated along the eastern margin of Laurentia during the late Neoproterozoic to early Paleozoic as a result of the breakup of Rodinia and formation of the Iapetus Ocean. Detrital zircon data show considerable variability in provenance of time-equivalent units that has implications for paleodrainage and paleogeography. Samples from northwest Scotland and northeast Greenland show detrital zircon U-Pb age groupings dominated by Archean and Paleoprotero-zoic populations consistent with derivation largely from the West Greenland segment of the North Atlantic craton. In Scotland, time-equivalent outboard sedimentary sequences show contrasting Archean and Proterozoic populations, including a substantial ca. 1.1–1.0 Ga component, indicative of derivation from the Grenville orogen to the southwest. These contrasting paleodrainage patterns, consistent with paleocurrent data, must have developed during the early phase of passive-margin thermal subsidence and may have been accentuated by remnant rift shoulders. In Newfoundland and the U.S. Appalachians, time-equivalent sedimentary sequences are located within the hinterland of the Grenville orogen and are dominated by ca. 1.1–1.0 detritus with very few pre-Mesoproterozoic grains. The Grenville deformation front in these areas may have constituted a drainage divide that limited sediment input from the cratonic interior. 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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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 | 0,000 | 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 | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 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 découle