Tracing magma sources of three different S-type peraluminous granitoid series by in situ U–Pb geochronology and Hf isotope zircon composition: The Variscan Montes de Toledo batholith (central Spain)

Metasedimentary and igneous xenoliths from Tallante (Betic Cordillera, Spain): Inferences on crust–mantle interactions and clues for post-collisional volcanism magma sources

“…2a, b) calculated relative to the average meta-sedimentary composition of the Iberian basement (López-Guijarro et al, 2008;Villaseca et al, 2014), which suggest that the upper crust beneath Tallante suffered an important melting episode during the Paleozoic, plausibly between 300 and 320 Ma. These ages correspond to Variscan ages obtained on metasedimentary rocks from sections exposed in the neighboring occurrence of Ronda and Beni Bousera (Montel et al, 2000;Ruiz Cruz and Sanz de Galdeano, 2014) and in general conform to ages obtained on high-grade metamorphic rocks and S-type granitoids from various Iberian occurrences (Esteban et al, 2011;Merino Martínez et al, 2014).…”

Petrographic and geochemical study of the stone warrior stelae from central Iberia: Linking the geological record and archaeological heritage

“…Therefore, the most likely scenario is that the granite material was previously quarried and moved away from the original location until the time when it was reworked as a stele. The high Be and Ta contents and the high U/Th ratios of the ET stele (Figure c) are quite similar to the leucogranites from the Belvís de Monroy pluton (W‐MTB), which also presents aplopegmatitic facies, though the latter occasionally bears Be‐rich minerals (beryl, chrysoberyl and/or gahnite) and scarce phosphates (Merino et al, , Merino Martínez et al, ). Similarly, the Navamorcuende leucogranite contains garnet as an accessory mineral (mainly related to the aplopegmatite facies) and tourmaline is more abundant and greenish under the microscope (Figure g,h).…”

“…Both domains were generated during the Variscan orogeny (317–296 Ma; Orejana, Merino, Villaseca, Pérez‐Soba, & Cuesta, ; Orejana, Villaseca, Valverde‐Vaquero, Belousova, & Armstrong, ; and references therein) and show similar granite rocks, formed by granodiorites and monzogranites with very frequent leucocratic types (Figure b), the latter scarcely bearing dark minerals. They mostly differ in their geochemical features: the MTB granites are characterized by high concentrations of P, Li, Be and U when increasing their silica content, whereas the SCSB granites show higher contents in CaO, FeO, MgO, Y and Nb (Andonaegui & Villaseca, ; Merino Martínez et al, ; Villaseca et al, ). The intrusion of these magmas induced a thermal impact on the surrounding host rocks, modifying their petrographic features in proportion to the degree of influence with this contact metamorphic aureole (Figure b).…”

“…The SCSB, located in the northern part of the Tagus basin, is a voluminous plutonic assemblage emplaced within Proterozoic to Paleozoic metasedimentary and meta-igneous units in the northern part of the CIZ (Figure 2b). (Andonaegui & Villaseca, 1998;Merino Martínez et al, 2014;Villaseca et al, 2008).…”

Mineral chemistry of late Variscan gabbros from central Spain: constraints on crystallisation processes and nature of the parental magmas

“…The last events of the Variscan orogeny are characterised in central Spain (and in many other western Variscan massifs) by a widespread felsic magmatism, with abundant granite intrusions emplaced in the range ~310-298 Ma (e.g., Orejana et al, 2012;Merino Martínez et al, 2014, and references therein). Late Variscan magmatism, including both the felsic magmas and the accompanying scarce basic melts, could have been originated by adiabatic decompression as lithosphere experienced considerable thinning during the orogen collapse (e.g., Orejana et al, 2009;.…”