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Villaseca González, Carlos ; Ancochea Soto, Eumenio ; Orejana García, David ; Jeffries, Teresa E. | Geological Society of London | 2010Spinel lherzolite xenoliths from the Cenozoic Calatrava volcanic field provide a sampling of the lithospheric mantle of central Spain. The xenoliths are estimated to originate from depths of 35–50 km. Trace element content of clinopyroxene and C[...]texto impreso
Fernández Suárez, Javier ; Díaz García, Florentino ; Jeffries, Teresa E. ; Arenas Martín, Ricardo ; Abati Gómez, Jacobo | Blackwell Publishing Ltd | 2003Insight into the origin and pre-orogenic palaeogeographical links of terranes involved in the assembly of collisional mountain belts is fundamental to the understanding of orogenic processes. Here we address the provenance and possible tectonic [...]texto impreso
Gutiérrez Alonso, Gabriel ; Fernández Suárez, Javier ; Jeffries, Teresa E. ; Johnston, Stephen T. | American Geophysical Union | 2011U?Pb (zircon) crystallization ages of 52 late?Variscan granitoid intrusions from NW Iberia (19 from new data, 33 from previous studies) constrain the lithospheric evolution of this realm of the Variscan belt of Western Europe and allow assessmen[...]texto impreso
Fernández Suárez, Javier ; Gutiérrez Alonso, Gabriel ; Johnston, Stephen T. ; Jeffries, Teresa E. ; Pastor Galán, Daniel ; Jenner, G.A. ; Murphy, J. Brendam | Elsevier Science B.V., Amsterdam | 2011A suite of post-tectonic granitoids (mostly peraluminous, broadly I-type granodiorites and monzogranites) and mafic rocks from NWIberia with crystallization ages between ca. 309 and 290 Ma has been investigated for Sm–Nd isotopes and inherited z[...]texto impreso
Murphy, J. Brendam ; Fernández Suárez, Javier ; Jeffries, Teresa E. | Geological Society of America | 2004The Silurian–Lower Devonian Arisaig Group, in the Avalon terrane of Nova Scotia, consists of a thick (~1900 m) sequence of unmetamorphosed fossiliferous siliciclastic strata deposited during terrane accretionary events in the Appalachian-Caledon[...]texto impreso
Muñoz García, Mercedes ; Sagredo Ruiz, Juana ; Ignacio San José, Cristina de ; Fernández Suárez, Javier ; Jeffries, Teresa E. | Elsevier Science B.V., Amsterdam | 2005Zircons from a nepheline-syenite of the Fuerteventura Basal Complex were dated by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). The age obtained from a total of 21 U–Th–Pb analyses is 25.4F0.3 Ma (2r) indicating a late[...]texto impreso
A pre-Rodinian ophiolite involved in the Variscan suture of Galicia (Cabo Ortegal Complex, NW Spain)
Sánchez Martínez, Sonia ; Jeffries, Teresa E. ; Arenas Martín, Ricardo ; Fernández Suárez, Javier ; García Sánchez, Raquel | Geological Society of London. | 2006U–Pb dating of zircons from a metagabbro of the Purrido amphibolitic unit (Cabo Ortegal Complex, NW Iberian Massif) yielded an age of 1159 ± 39 Ma, interpreted to approximate the crystallization age of the gabbroic protolith. Considering the arc[...]texto impreso
Martínez Catalán, José R. ; Arenas Martín, Ricardo ; Abati Gómez, Jacobo ; Sánchez Martínez, Sonia ; Díaz García, Florentino ; Fernández Suárez, Javier ; González Cuadra, Pablo ; Castiñeiras García, Pedro ; Gómez Barreiro, Juan ; Díez Montes, Alejandro ; González Clavijo, Emilio ; Rubio Pascual, Francisco J. ; Andonaegui Moreno, Pilar ; Jeffries, Teresa E. ; Alcock, James E. ; Díez Fernández, Rubén ; López Carmona, Alicia | Elsevier Masson, France | 2009Ophiolites of different Paleozoic ages occur in North-West (NW) Iberia in a rootless suture representing the remnants of the Rheic Ocean. Associated allochthonous terranes in the hanging- and foot-walls of the suture derive from the former margi[...]texto impreso
Gutiérrez Alonso, Gabriel ; Fernández Suárez, Javier ; Jeffries, Teresa E. ; Jenner, G.A. ; Tubrett, M.N. ; Cox, R. ; Jackson, S.E. | Elsevier | 2003If reconstruction of major events in ancient orogenic belts is achieved in sufficient detail, the tectonic evolution of these belts can offer valuable information to widen our perspective of processes currently at work in modern orogens. Here, w[...]texto impreso
Arenas Martín, Ricardo ; Sánchez Martínez, Sonia ; Castiñeiras García, Pedro ; Jeffries, Teresa E. ; Díez Fernández, Rubén ; Andonaegui Moreno, Pilar | Universidad Complutense de Madrid | 2009Recent field work and mapping in the lower units of the Cabo Ortegal Complex provided new data about the tectonic mélange that appears in the lowest structural position: the Somozas Mélange. This mélange unit with average thickness of 1800 m is [...]texto impreso
Fernández Suárez, Javier ; Gutiérrez Alonso, Gabriel ; Jeffries, Teresa E. | Elsevier Science B.V., Amsterdam | 2002Detrital zircons from late Neoproterozoic rocks of the peri-Gondwanan Cadomian belt of SW Iberia and north Armorican Domain of Brittany record Neoproterozoic (ca. 860-550 Ma), Palaeoproterozoic (ca. 2300-1800) and Archaean (ca 3300-2600 Ma) U-Pb[...]texto impreso
Villaseca González, Carlos ; Orejana García, David ; Belousova, Elena ; Armstrong, Richard A. ; Pérez-Soba Aguilar, Cecilia ; Jeffries, Teresa E. | Springer Science Business Media | 2011Ion microprobe U–Pb analyses of zircons from three gabbroic intrusions from the Spanish Central System (SCS) (Talavera, La Solanilla and Navahermosa) yield Variscan ages (300 to 305 Ma) in agreement with recent studies. Only two zircon crystals [...]texto impreso
Fernández Suárez, Javier ; Arenas Martín, Ricardo ; Jeffries, Teresa E. ; Whitehouse, Martín J. ; Villaseca González, Carlos | Chicago, University of Chicago Press. | 2006A U-Pb laser ablation inductively coupled plasma mass spectrometry and secondary ion mass spectrometry geochronological study has been performed on zircons from a felsic granulite xenolith from the lower crust under the Variscan belt of Iberia.[...]
