Variscan Suture Zone and Suspect Terranes in the NW Iberian Massif: Allochthonous Complexes of the Galicia-Trás os Montes Zone (NW Iberia)

Catalán, José R. Martı́nez; Barreiro, Juan Gómez; Silva, Í. Dias da; Chichorro, M.; López-Carmona, Alicia; Castiñeiras, Pedro; Abati, Jacobo; Moreno, Pilar Andonaegui; Fernández‐Suárez, Javier; Cuadra, P. González; Benítez-Pérez, José Manuel

doi:10.1007/978-3-030-10519-8_4

Cited by 15 publications

(9 citation statements)

References 92 publications

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“…The latter resulted from the collision of the Laurussia and Gondwana continents during the late Paleozoic, resulting in the closure of the Rheic Ocean (Azor et al, 2008(Azor et al, , 2019Martínez Catalán et al, 2007). During the convergence and collision, several allochtonous terranes were involved, defining a complex suture pattern along the orogen (Ballèvre et al, 2014;Gómez Barreiro et al, 2010;Martínez Catalán et al, 2019;Quesada et al, 2019). Later on, a transpressional tectonic regime is inferred from the structure, variably modified by gravitational re-equilibration in the hinterland and by the formation of orogenic bends (oroclinals; e.g., Azor et al, 2019;Martínez Catalán, 2012).…”

Section: Geological Settingmentioning

confidence: 99%

Mapping and Interpreting the Uppermost Mantle Reflectivity Beneath Central and South‐West Iberia

et al. 2021

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• Two uppermost mantle P-wave reflections observed beneath the SW-Iberian Peninsula at 50-75 (H) km and 90-110 (L) km depth. • 'H' corresponds to an increase in velocity and is likely the Hales discontinuity. 'L' is related to velocity decrease at the LAB. • Full-wavefield modeling shows the Hales discontinuity corresponds to a zone of randomly distributed thin bodies with small Vp variations.

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Section: Geological Settingmentioning

confidence: 99%

Mapping and Interpreting the Uppermost Mantle Reflectivity Beneath Central and South‐West Iberia

et al. 2021

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“…Geochemical data from poorly known acid migmatites exposed in the Cabo Ortegal Complex (Western Variscides, NW Spain) are presented here. The migmatites, previously called granulitic orthogneisses [2] , are part of the high-pressure granulite unit, tectonically placed between the eclogite and ultramafic (peridotite-pyroxenite) units [3] . Except for the so-called felsic gneiss sample and the amphibolitic enclave, all the other samples bear evidence of partial melting.…”

Section: Data Descriptionmentioning

confidence: 99%

Geochemical dataset of high-pressure acid migmatites from the Cabo Ortegal Complex (NW Spain)

et al. 2022

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This brief note presents geochemical data from rock samples from the Cabo Ortegal Complex (NW Spain). The samples belong to acid lithologies within the mainly basic to intermediate granulite unit that have been poorly investigated so far. For this communication, five samples of the migmatites and an amphibolitic enclave within them have been analysed. The whole-rock major and trace-element analyses were accomplished by means of Q-ICPMS. The dataset provides new and useful information relevant to the origin of the acid migmatites and can be used in addition to information from neighbouring lithologies to enhance understanding of the geological evolution of the Western Variscan Belt.

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“…Ria de Vigo lies in the Iberian Variscan orogenic domain, formed during the Paleozoic (Julivert et al 1980;Martínez Catalán et al 2019) in the Galicia-Trás-os-Montes Zone (GTMZ; Fig. 1; Farias et al 2014).…”

Section: Study Areamentioning

confidence: 99%

Factors driving sediment compositional change in the distal area of the Ria de Vigo (NW Spain): oceanographic processes vs. paleopollution

Martins

Cazelli

Yhasnara

et al. 2022

Environ Sci Pollut Res

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We analyze potential Late Holocene metal contamination along a sediment core collected in the distal zone of Ria de Vigo (North Spain). Statistical treatment of the dataset based on a multiproxy approach enabled us to identify and disentangle factors influencing the depositional processes and the preservation of the records of this activity in the area over the last ≈3000 years bp. Some layers of the analyzed core have significant enrichment in Cu and a moderate enrichment in Ag, Mo, As, Sb, S, Zn, Ni, Sn, Cd, Cr, Co, Pb, and Li. The enrichment of these elements in some layers of this core may be related to mining activities that have taken place since classical times in the region. Successive phases of pollution were identified along the core KSGX24 related to the Late Bronze Age (≈3000-2450 years bp), Iron Age (≈2450-1850 years bp), Roman times (≈1850-1550 years bp), Middle Ages (≈1250-500 years bp), and industrial and modern (≈250-0 years bp) anthropic activities. The protection of the Cies Islands, the erosive and transport capacity of the rivers in the region, oscillations of the oceanographic and climatic regime, atmospheric contamination, and diagenetic sedimentary processes might have contributed to the accumulation and preservation of this record in the distal region of the Ria de Vigo. The studied core shows that the industrial and preindustrial anthropic impacts caused an environmental liability and contributed to the presence of moderate to heavy pollution of various metals in surface and subsurface sediment layers in the distal sector of the Ria de Vigo, which could be a hazard to biota.

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Variscan Suture Zone and Suspect Terranes in the NW Iberian Massif: Allochthonous Complexes of the Galicia-Trás os Montes Zone (NW Iberia)

Cited by 15 publications

References 92 publications

Mapping and Interpreting the Uppermost Mantle Reflectivity Beneath Central and South‐West Iberia

Mapping and Interpreting the Uppermost Mantle Reflectivity Beneath Central and South‐West Iberia

Geochemical dataset of high-pressure acid migmatites from the Cabo Ortegal Complex (NW Spain)

Factors driving sediment compositional change in the distal area of the Ria de Vigo (NW Spain): oceanographic processes vs. paleopollution

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