English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. A geochemical comparison of early Palaeozoic felsic magmatic episodesthroughout the south-western European margin of Gondwana is made andincludes (i) Furongian–Early Ordovician (Toledanian) activities recorded inthe Central Iberian and Galicia–Tras-os-Montes zones of the IberianMassif, and (ii) Early–Late Ordovician (Sardic) activities in the EasternPyrenees, Occitan Domain (Albigeois, Montagne Noire and Mouthoumet massifs)and Sardinia. Both phases are related to uplift and denudation of aninherited palaeorelief, and stratigraphically preserved as distinct angulardiscordances and paraconformities involving gaps of up to 22 million years. Thegeochemical features of the predominantly felsic Toledanian and Sardic activitiespoint to a predominance of magmatic byproducts derived from the melting ofmetasedimentary rocks, rich in SiO 2 and K 2 O and with a peraluminouscharacter. Zr  ∕  TiO 2 , Zr  ∕  Nb, Nb  ∕  Y and Zr vs. Ga  ∕  Al ratios, and rare-earth element (REE) and e Nd (t) values suggest the contemporaneity, for both phases, of twogeochemical scenarios characterized by arc and extensional features evolvingto distinct extensional and rifting conditions associated with the finaloutpouring of mafic tholeiite-dominant lava flows. The Toledanian andSardic magmatic phases are linked to neither metamorphism nor penetrativedeformation; on the contrary, their unconformities are associated withfoliation-free open folds subsequently affected by the Variscan deformation.The geochemical and structural framework precludes subduction-generatedmelts reaching the crust in a magmatic arc-to-back-arc setting and favourspartial melting of sediments and/or granitoids in the lower continental crusttriggered by the underplating of hot mafic magmas related to the opening ofthe Rheic Ocean.

solid earth

Comparative geochemical study on Furongian–earliest Ordovician (Toledanian) and Ordovician (Sardic) felsic magmatic events in south-western Europe: underplating of hot mafic magmas linked to the opening of the Rheic Ocean