Telescoping of three distinct magmatic suites in an orogenic setting: Generation of Hercynian igneous rocks of the Albera Massif (Eastern Pyrenees)

Codina, Miquel; Pin, C.; Enrique, P.; Liesa, Montserrat

doi:10.1016/j.lithos.2005.01.002

Cited by 31 publications

(21 citation statements)

References 32 publications

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“…horizontal magmatic lineation acquired during orogen-parallel extension. The spatial correspondence of U2 plutons with late Carboniferous shear zones dated at about 325-305 Ma in northern Sardinia (Carosi et al, 2012;Di Vincenzo, 2004) supports a model of emplacement through channelized flow within ductile shear zones , as proposed for late Variscan granites in the French Massif Central (Faure et al, 2010), for the Armorican Massif (Bellot, 2007), and for the analogous domain in the Iberian Massif (Vilà et al, 2005). However, the development of horizontal magmatic foliations (Gattacceca et al, 2004) indicates that shear zones represent efficient pathways for melt migration rather than sites of emplacement.…”

Section: Emplacement Mechanisms and Tectonic Settingsupporting

confidence: 70%

Evolution of the Corsica–Sardinia Batholith and late-orogenic shearing of the Variscides

et al. 2015

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Section: Emplacement Mechanisms and Tectonic Settingsupporting

confidence: 70%

Evolution of the Corsica–Sardinia Batholith and late-orogenic shearing of the Variscides

et al. 2015

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“…Figure 11b shows intense interaction between mantle-derived magmas and continental basement with important input of mantle components. Isotopic data for the Chinese Altai orogen are after Hu et al [2000] and Wang et al [2009, and references therein], data for crustal xenoliths are from the Mongolian Altai after Barry et al [2003], and those of European Variscides are after Bickle et al [1988], Roberts et al [2000], and Vilà et al [2005]. Summary of data are presented in Table S5.…”

Section: Crustal Architecture Of the Chinese Altaimentioning

confidence: 99%

Anatexis of accretionary wedge, Pacific-type magmatism, and formation of vertically stratified continental crust in the Altai Orogenic Belt

et al. 2016

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Granitoid magmatism and its role in differentiation and stabilization of the Paleozoic accretionary wedge in the Chinese Altai are evaluated in this study. Voluminous Silurian‐Devonian granitoids intruded a greywacke‐dominated Ordovician sedimentary succession (the Habahe Group) of the accretionary wedge. The close temporal and spatial relationship between the regional anatexis and the formation of granitoids, as well as their geochemical similarities including rather unevolved Nd isotopic signatures and the strong enrichment of large‐ion lithophile elements relative to many of the high field strength elements, may indicate that the granitoids are product of partial melting of the accretionary wedge rocks. Whole‐rock geochemistry and pseudosection modeling show that regional anatexis of fertile sediments could have produced a large amount of melts compositionally similar to the granitoids. Such process could have left a high‐density garnet‐ and/or garnet‐pyroxene granulite residue in the deep crust, which can be the major reason for the gravity high over the Chinese Altai. Our results show that melting and crustal differentiation can transform accretionary wedge sediments into vertically stratified and stable continental crust. This may be a key mechanism contributing to the peripheral continental growth worldwide.

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“…Rocks of the Canigó, Roc de Frausa and Albera massifs have been taken into account in this work, in which volcanic rocks of the Pierrefite and Albera massifs, and the so-called G3 orthogneisses by Guitard (1970) are also included. All subgroups vary compositionally from subalkaline andesite to rhyolite, as illustrated in the Pearce's (1996) diagram of Figure 4 (data compiled from Vilà et al, 2005;Castiñeiras et al, 2008b;Liesa et al, 2011;Navidad et al, 2018).…”

Section: Furongian-to-mid Ordovician Suitementioning

confidence: 99%

Comparative geochemical study on Furongian (Toledanian) and Ordovician (Sardic) felsic magmatic events in south-western Europe

Álvaro¹,

Sánchez-García²,

Puddu³

et al. 2020

Preprint

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Abstract. A geochemical comparison of Early Palaeozoic felsic magmatic episodes throughout the south-western European margin of Gondwana is analysed. The comparison is made between (i) Furongian–Early Ordovician (Toledanian) activies recorded in the Central Iberian and Galicia-Trás-os-Montes Zones of the Iberian Massif, and (ii) Early–Late Ordovician (Sardic) activities in the eastern Pyrenees, Occitan Domain (Albigeois, Montagne Noire and Mouthoumet massifs) and Sardinia. Both phases are related to uplift and denudation of an inherited palaeorelief, and stratigraphically preserved as distinct angular discordances and paraconformities involving gaps of up to 30 m.y. The geochemical features of the Toledanian and Sardic, felsic-dominant activies point to a predominance of byproducts derived from the melting of metasedimentary rocks, rich in SiO2 and K2O and with peraluminous character. Zr / TiO2, Zr / Nb, Nb / Y and Zr vs. Ga / Al ratios, and REE and ƐNd values suggest the contemporaneity, for both phases, of two geochemical scenarios characterized by arc and extensional features evolving to distinct extensional and rifting conditions associated with the final outpouring of mafic tholeiitic-dominant lava flows. The Toledanian and Sardic phases are linked to neither metamorphism nor penetrative deformation; on the contrary, their unconformities are associated with foliation-free open folds subsequently affected by the Variscan deformation. The geochemical and structural framework precludes a subduction scenario reaching the crust in a magmatic arc to back-arc setting, but favours partial melting of sediments and/or granitoids in a continental lower crust triggered by the underplating of hot mafic magmas during extensional events related to the opening of the Rheic Ocean.

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Telescoping of three distinct magmatic suites in an orogenic setting: Generation of Hercynian igneous rocks of the Albera Massif (Eastern Pyrenees)

Cited by 31 publications

References 32 publications

Evolution of the Corsica–Sardinia Batholith and late-orogenic shearing of the Variscides

Evolution of the Corsica–Sardinia Batholith and late-orogenic shearing of the Variscides

Anatexis of accretionary wedge, Pacific-type magmatism, and formation of vertically stratified continental crust in the Altai Orogenic Belt

Comparative geochemical study on Furongian (Toledanian) and Ordovician (Sardic) felsic magmatic events in south-western Europe

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