Arc-related Ediacaran magmatism along the northern margin of Gondwana: Geochronology and isotopic geochemistry from northern Iberia

Rubio-Ordóñez, A.; Gutiérrez-Alonso, Gabriel; Valverde-Vaquero, Pablo; Cuesta, A.; Gallastegui, G.; Gerdes, Axel; Cárdenes, V.

doi:10.1016/j.gr.2013.09.016

Cited by 50 publications

(26 citation statements)

References 66 publications

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“…There is compelling evidence that a significant part, if not all the Precambrian basement exposed in Iberia formed in close relation to this active belt, as indicated by thick series of Ediacaran turbidites as well as volcanic arc rocks (Fernández-Suárez et al 2000;Bandrés et al 2004;Rodríguez Alonso et al 2004;Rubio-Ordóñez et al 2013). However, some authors consider those series to represent a passive margin sequence with contributions from recycled orogens (Valladares et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Magmatic evolution in the N-Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia-Trás-os-Montes Zone and from the Central Iberian Zone (NW Iberian Massif)

Silva

Fernández

Montes

et al. 2015

Int J Earth Sci (Geol Rundsch)

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Section: Discussionmentioning

confidence: 99%

Magmatic evolution in the N-Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia-Trás-os-Montes Zone and from the Central Iberian Zone (NW Iberian Massif)

Silva

Fernández

Montes

et al. 2015

Int J Earth Sci (Geol Rundsch)

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“…In contrast, Cadomian magmatism is metaluminous to weakly peraluminous (Fernández-Suárez et al, 1998;Rubio-Ordóñez et al, 2015). Therefore, the apparently more peraluminous nature of the ECS (cf.…”

Section: Zircon Inheritance and Zircon Saturation Temperaturesmentioning

confidence: 98%

“…1) includes Neoproterozoic rocks with Gondwanan (North Africa) affinity, which form the basement for late Ediacaran-early Cambrian subduction-related and early Paleozoic passive margin sequences, respectively (e.g., Rodríguez Alonso et al, 2004;Murphy et al, 2008;Fernández-Suárez et al, 2014;Rubio-Ordóñez et al, 2015). In Late Devonian and Carboniferous time, the collision of the passive margin of Gondwana (acting as the lower plate) with Laurussia (upper plate) resulted in the Variscan orogen and ultimately in the amalgamation of Pangea (e.g., Matte, 1986Matte, , 2001Murphy et al, 2009;Kroner and Romer, 2013).…”

Section: Regional Settingmentioning

confidence: 99%

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Exhuming a cold case: The early granodiorites of the northwest Iberian Variscan belt—A Visean magmatic flare-up?

et al. 2018

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In this study we report laser ablation-inductively coupled plasma-mass spectrometer U-Pb ages of granitoids from the so-called early granodiorites of the northwest Iberian Variscan belt. The U-Pb results attest to significant magmatic activity in Visean time (ca. 347-337 Ma) that generated a hitherto poorly constrained granitoid suite in the northwest Iberian tract of the western European Variscan belt realm. This early Carboniferous suite (ECS) is mainly composed of peraluminous cold and hot crustal granodiorites and monzogranites with minor associated mafic rocks that attest to minor involvement of mantle melting. Based on the geochronological and geochemical data, we compare the Visean granitoids with younger Variscan granitoids in northwest Iberia and, in view of the tectonothermal scenarios of the Variscan collision in northwest Iberia, propose a model for the genesis of the ECS in northwest Iberia that involves rapid melting upon fast exhumation of the thickened Gondwanan crust in the course of the protracted Variscan collision.

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“…615-548 Ma; Gasquet et al 2005;Pouclet et al 2007;Walsh et al 2012;Álvaro et al 2014a), the Malcocinado Group of the OssaMorena Zone in SW Iberia (587-540 Ma; Sánchez-García et al 2003, some reworked clasts lining the Narcea/ Herrería contact in the Cantabrian Zone (ca. 575-560 Ma; Rubio-Ordóñez et al 2015), and the Sériès Tuffs of the Axial Zone and the Rivernous Formation of the northern Montagne Noire in the Occitan Domain (ca. 542-539 Ma; Lescuyer and Cocherie 1992;Laumonier et al 2004;Álvaro et al 2014b;Pouclet et al 2017;Padel et al in press).…”

Section: Cadomian Arc-related Events In West Gondwanamentioning

confidence: 99%

Cadomian volcanosedimentary complexes across the Ediacaran–Cambrian transition of the Eastern Pyrenees, southwestern Europe

Padel

Álvaro

Casas

et al. 2017

Int J Earth Sci (Geol Rundsch)

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International audienceThe volcanism hosted by the Ediacaran–Terreneuvian Canaveilles Group of the Eastern Pyrenees displays two distinct geochemical affinities: (1) metabasites of the Nyer and Olette formations reflect the emplacement of a tholeiitic magmatism linked to extensional conditions, whereas (2) subsequent felsic and calc-alkaline magmatic rocks marking the top of the Olette Formation and forming the overlying Fabert and Finestrelles members represent Cadomian magmatic events. Based on U–Pb zircon dating constraints, palaeotopographic relationships linked to onlap geometries and distance from vent sources, three volcanosedimentary edifices can be distinguished, the so-called Tregurà (ca. 565–552 Ma), Cap de Creus (ca. 558 Ma) and Coll d’Ares (ca. 542–532 Ma) edifices. The top of their palaeoreliefs recorded locally the nucleation of centres of microbial carbonate productivity (Puig Sec Member) linked to synsedimentary tilting and karstification. Throughout West Gondwana, the presence of carbonate production across the Ediacaran–Cambrian transition is exclusively located in back-arc settings (Central-Iberian Zone) and areas far from the Cadomian subduction trench and devoid of significant terrigenous input, such as those reported in the Eastern Pyrenees and the neighbouring Montagne Noire

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Arc-related Ediacaran magmatism along the northern margin of Gondwana: Geochronology and isotopic geochemistry from northern Iberia

Cited by 50 publications

References 66 publications

Magmatic evolution in the N-Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia-Trás-os-Montes Zone and from the Central Iberian Zone (NW Iberian Massif)

Magmatic evolution in the N-Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia-Trás-os-Montes Zone and from the Central Iberian Zone (NW Iberian Massif)

Exhuming a cold case: The early granodiorites of the northwest Iberian Variscan belt—A Visean magmatic flare-up?

Cadomian volcanosedimentary complexes across the Ediacaran–Cambrian transition of the Eastern Pyrenees, southwestern Europe

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