Late Neoproterozoic crustal growth in the European Variscides: Nd isotope and geochemical evidence from the Sierra de Córdoba Andesites (Ossa-Morena Zone, Southern Spain)

Detrital zircon ages from a Lower Ordovician quartzite of the İstanbul exotic terrane (NW Turkey): evidence for Amazonian affinity

“…The basement of the _ Istanbul terrane is exposed in the Bolu Massif, whereas basement units of the Zonguldak terrane crop out in small inliers further east in the Quésada 1990, Abramovitz et al 1999, Guterch et al 1999, Miller et al 1999, Unrug et al 1999, Chantraine et al 2001, Savov et al 2001, Bandres et al 2002, Chen et al 2002, Dörr et al 2002, Gubanov 2002, Linnemann and Romer (2002, Murphy et al 2002, Neubauer 2002, Pin et al 2002, Romano et al 2004, Gürsu and Göncüoglu 2005, Okay et al 2008Ustaömer et al 2005Ustaömer et al , 2009. GTZ Gavrovo-Tripolitza-Ionian Zone, P Pindos Zone, VA Vardar-Axios Zone.…”

Potential sources of Ediacaran strata of Iberia: a review

“…This geodynamic setting is confirmed by the calc-alkaline felsic magmatism contemporaneous with deposition of the Narcea Slates and Serie Negra (Fernandez-Suarez et al, 2013;Pin et al, 2002;Sanchez Carretero et al, 1989, 1990. In addition, Ediacaran strata of the OMZ include tholeiitic mafic rocks suggesting involvement of oceanic island arc magmatism (Eguíluz et al, 2000;Pereira, Medina, Chichorro, & Linnemann, 2006).…”

“…In addition, the Série Negra is locally overlain by the São Jerónimo Formation, composed of interbedded andesites, conglomerates, sandstones and shales (Liñán, 1978). This volcanic sequence with a calc-alkaline signature (Pin, Liñan, Pascual, Donaire, & Valenzuela, 2002) is assigned to the Ediacaran based on trace fossil and microfossil content (Quesada, 1990a), and because it is unconformably overlain by Lower Cambrian sandstones (Torrearboles Formation; Gámez Vintaned et al, 2006;Liñán, Perejón, & Sdzuy, 1993). In the same stratigraphic position, i.e.…”

“…The T DM ages estimated for all Edicaran strata of Iberia ages are significantly older than their depositional ages, indicating a source mainly composed of old crustal rocks, with minor contribution of different proportions of juvenile material. The Malcocinado and San Jerónimo formations volcaniclastic rocks show εNd (i = 550) values ranging from +2.1 to −5.1 and T DM ages vary from 1.1 to 1.4 Ga, suggesting a mixed provenance consisting of juvenile and old, recycled crustal components (Lopez-Guijarro et al, 2008;Pin et al, 2002). The San Jerónimo Formation calc-alkaline volcanics (Cordoba andesites) yield εNd(i = 550) positive values ranging from +2.9 to +7.6 and T DM ages vary from 0.6 to 0.9 Ga (Pin et al, 2002).…”

“…The Malcocinado and San Jerónimo formations volcaniclastic rocks show εNd (i = 550) values ranging from +2.1 to −5.1 and T DM ages vary from 1.1 to 1.4 Ga, suggesting a mixed provenance consisting of juvenile and old, recycled crustal components (Lopez-Guijarro et al, 2008;Pin et al, 2002). The San Jerónimo Formation calc-alkaline volcanics (Cordoba andesites) yield εNd(i = 550) positive values ranging from +2.9 to +7.6 and T DM ages vary from 0.6 to 0.9 Ga (Pin et al, 2002). Chichorro et al, 2008;Fernandez-Suarez et al, 2013;Lopez-Guijarro et al, 2008;Nägler et al, 1995;Pereira, Medina, et al, 2006;Sola et al, 2011;Tassinari et al, 1996;Ugidos et al, 2003;2010): A -Chondrite normalised REE plot; B -εNd vs. time plots; εNd(i) calculated for the stratigraphic ages in the interval c. 600-545 Ma.…”