RT Journal Article
T1 Morfología de circones vs. filiación geoquímica de rocas metavolcánicas en el Antiforme del Narcea (N de España)
T1 Zircon morphology vs. geochemical signature in meta-volcanic rocks of the Narcea Antiform (N Spain)
A1 Rubio Ordóñez, Álvaro
A1 Cuesta, Andrés
A1 Gallastegui, G.
A1 Suárez Hernando, Oier
A1 Pupin, J. P.
A1 Corretgé Castañón, Luis Guillermo
AB In the Narcea Antiform, both Ediacaran upper volcanic series and volcanic clasts in the overlying Cambrianmicro-conglomerates, show geochemistry between those of calc-alkaline and alkaline series in the TAS diagram,and a mainly calc-alkaline trend in the Zr/TiO2-Nb/Y diagram. However, zircons reveal a common hightemperature nature of the crystals and have overall characteristics typical of alkaline magmas. Such anapparent contradiction can be interpreted as a result of a change in the tectonic conditions. This wouldaccount for the mixed characteristics of rocks having a calc-alkaline geochemical signature but with analkaline mineral assemblage. Moreover, zircon morphology has turned out to be an interesting clue toresolve the petrographical and geochemical discrimination in low-grade metamorphosed paleovolcanic rocks
YR 2006
FD 2006
LK http://hdl.handle.net/10272/8584
UL http://hdl.handle.net/10272/8584
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026