RT Journal Article
T1 Multiple crustal sources for post-tectonic I-type granitesin the Hercynian Iberian Belt
A1 Villaseca González, Carlos
A1 Bellido Mulas, Félix
A1 Pérez-Soba Aguilar, Cecilia María
A1 Billstrom, Kjell
AB A post-tectonic plutonic array of felsic I-typegranites crops out in the western Hercynian Iberian Belt.Isotope (Sr, N d, Pb) data favour the absence of an importantinput of juvenile magmas in late- to post- tectonicHercynian felsic magmatism in western Iberia, but suggesta reworking of different crustal protoliths, includingoceanic metabasic rocks accreted to mid-to-Iower crustallevels during the early stages of the collision. I-type graniteswere derived from different meta-igneous protoliths rangingfrom metabasic to felsic compositions depending on theirgeographical position from the external (e.g. Galicia-NPortugal, GNP) to the innermost continental areas (SpanishCentral System and Los Pedroches Batholiths). The GNP 1-type pIu tons related to eo-Hercynian accretional terraneshave lower initial 87Sr/86Sr ratios, lower negative εNdvalues, and higher 206PbP04Pb ratios than other I-type granites of the Central Iberian zone. These more isotopicallyprimitive Hercynian I-type granites are important intracking pre-Hercynian accreted oceanic lithosphereterranes.
PB Springer Science Business Media
SN 0930-0708
YR 2009
FD 2009
LK https://hdl.handle.net/20.500.14352/49584
UL https://hdl.handle.net/20.500.14352/49584
LA eng
NO The original publication is available at www.springerlink.com
DS Docta Complutense
RD 8 abr 2025