Secular isotopic variation in lithospheric mantle through the Variscan orogen: Neoproterozoic to Cenozoic magmatism in continental Europe
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Research Article| May 02, 2019 Secular isotopic variation in lithospheric mantle through the Variscan orogen: Neoproterozoic to Cenozoic magmatism in continental Europe Jaroslav Dostal; Jaroslav Dostal 1Department of Geology, Saint Mary's University, 923 Robie Street, Halifax, Nova Scotia B3H 3C3, Canada Search for other works by this author on: GSW Google Scholar J. Brendan Murphy; J. Brendan Murphy 2Department of Earth Sciences, St. Francis Xavier University, Antigonish, Nova Scotia B2G 2W5, Canada3Earth Dynamics Research Group, ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia Search for other works by this author on: GSW Google Scholar J. Gregory Shellnutt J. Gregory Shellnutt 4Department of Earth Sciences, National Taiwan Normal University, 88 Tingzhou Road Section 4, Taipei 11677, Taiwan Search for other works by this author on: GSW Google Scholar Author and Article Information Jaroslav Dostal 1Department of Geology, Saint Mary's University, 923 Robie Street, Halifax, Nova Scotia B3H 3C3, Canada J. Brendan Murphy 2Department of Earth Sciences, St. Francis Xavier University, Antigonish, Nova Scotia B2G 2W5, Canada3Earth Dynamics Research Group, ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia J. Gregory Shellnutt 4Department of Earth Sciences, National Taiwan Normal University, 88 Tingzhou Road Section 4, Taipei 11677, Taiwan Publisher: Geological Society of America Received: 29 Jan 2019 Revision Received: 27 Mar 2019 Accepted: 10 Apr 2019 First Online: 02 May 2019 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2019 Geological Society of America Geology (2019) 47 (7): 637–640. https://doi.org/10.1130/G46067.1 Article history Received: 29 Jan 2019 Revision Received: 27 Mar 2019 Accepted: 10 Apr 2019 First Online: 02 May 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jaroslav Dostal, J. Brendan Murphy, J. Gregory Shellnutt; Secular isotopic variation in lithospheric mantle through the Variscan orogen: Neoproterozoic to Cenozoic magmatism in continental Europe. Geology 2019;; 47 (7): 637–640. doi: https://doi.org/10.1130/G46067.1 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 SocietyGeology Search Advanced Search Abstract The evolution of the mantle source beneath a terrane is recorded by the Sm-Nd isotopic systematics of mafic rocks over extended periods of time. The evolution of the mantle beneath the Variscan massifs of continental Europe is tracked in order to examine the coupling between the crust and underlying continental lithospheric mantle during the late Paleozoic Variscan orogeny. Late Neoproterozoic and early Paleozoic (Cambrian–Devonian) extension-related mafic rocks have εNd(t) values similar to depleted mantle and so were probably derived from juvenile mantle sources. Thus, weak deformation and low-grade metamorphism associated with the ca. 540 Ma Cadomian orogeny did not change the mantle source beneath the Variscan massifs. In contrast, late Carboniferous–Permian mafic magmatism, which erupted in the aftermath of the collision between Gondwana and Laurussia, is characterized by negative εNd(t) values and significantly older depleted mantle model ages (TDM = 1800–800 Ma), suggesting derivation from a lithospheric mantle contaminated by late Paleozoic subduction. This characteristic is shared by most Variscan massifs, and it is consistent with the vast tracts of allochthonous peri-Gondwanan terranes exposed within the orogen, which suggest regional crust-mantle decoupling during Variscan collision. The regionally extensive Cenozoic European Volcanic Province has higher εNd(t) values (+5 to +7) and significantly lower TDM ages (ca. 500–100 Ma), suggesting that the continental lithospheric mantle was refertilized. 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 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| 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) | 0,015 | 0,002 |
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; les deux têtes enseignantes s’accordent sur ce qui est montré ici.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».