@misc{10481/72840,
year = {2022},
month = {6},
url = {http://hdl.handle.net/10481/72840},
abstract = {Cambro–Ordovician silicic magmatism in the Central Iberian Zone of the Iberian Massif (Ollo de Sapo Formation, OSF) constitutes a voluminous and geochemically atypical magmatic event that formed preceding the breakup of the northern margin of Gondwana. To date, and due to uncommon geochemical signatures, such as a high Fe, Mg content compared to anatectic melts and the departing from the calc-alkaline trends, the origin of such magmatic event is not fully understood. Herein, we report a data-analysis of geochemistry linking magmas and source compositions. The analysis of the combined data from multiple studies ascribes the geochemistry of the OSF rocks to a combination of extensive melting of Ediacaran metasiliciclastic rocks and a Ca-rich component. It is hypothesized that fluids released by crystallization of mafic magmas contributed to partial melting of a thick metasedimentary pile represented by Ediacaran siliciclastic rocks. Such melting event gave rise to a mobile nebulite or migma, which was able to extrude and form the super-eruption or “flare-up” that characterizes Cambro-Ordovician silicic magmatism at the Gondwana margin. Fast, catastrophic crustal melting with large-scale restite entrainment, triggered by the influx of mafic magma-derived fluids, are considered the main cause of the unique features of this Cambro-Ordovician atypical silicic large igneous province of Gondwana.},
organization = {Instituto de Ciências da Terra},
organization = {Spanish Research Agency},
organization = {Fundação para a Ciência e a Tecnologia},
organization = {Fundació Catalana de Trasplantament

UIDB/04683/2020},
organization = {Agencia Estatal de Investigación

	PGC2018-096534-B-I00},
publisher = {Elsevier},
keywords = {Cambro-Ordovician magmatism},
keywords = {Ollo de Sapo Formation},
keywords = {Data-analysis},
keywords = {Geochemical modelling},
keywords = {Extensive crustal melting},
title = {The unique Cambro-Ordovician silicic large igneous province of NW Gondwana: Catastrophic melting of a thinned crust},
doi = {10.1016/j.gr.2022.01.011},
author = {Rodriguez Almodóvar, Carmen and Castro, Antonio and Gómez Frutos, Daniel and Gutiérrez Alonso, Gabriel and Pereira, M. Francisco and Fernández, Carlos},
}