INVESTIGADORES
OTAMENDI Juan Enrique
congresos y reuniones científicas
Título:
U- Pb Zircon Geochronology of the Sierra Valle Fértil, Famatinian Arc, Argentina: petrological and geological implications
Autor/es:
OTAMENDI, J.E., DUCEA, M., Y BERGANTZ, G.,
Reunión:
Congreso; Geosur 2010 International Geological Congress on the Southern Hemisphere; 2010
Resumen:
We analyses
the significance of sixteen U-Pb zircon crystallization ages on igneous
plutonic and metasedimenatry rocks from Sierra Valle Fértil that we have
reported elsewhere (Ducea et al., 2010). U-Pb geochronology of zircons was
conducted by laser ablation multicollector inductively coupled plasma mass
spectrometry (LA-MC-ICP-MS) at the Arizona LaserChron Center. These sixteen
plutonic and metasedimentary rocks were collected in an east-west transect
across the plutonic section from the central Sierra Valle Fértil. Sampling encompasses
a plutonic suite from diorites to leucogranites, includes a granulite-facies
metasedimentary rock, and covers all the lithological diversity observed in the
crystalline section from Valle Fértil. This igneous plutonic suite formed at
low- to middle-crustal paleo-depths within the Early Ordovician
subduction-related magmatic belt from central- and northwestern Argentina,
which is known as Famatinian arc.