Sm-Nd and U-Pb Isotopic Evidence of Juvenile Crust in the Adirondack Lowlands and Implications for the Evolution of the Adirondack Mts.

Zircon U-Pb, Hf and O isotope constraints on growth versus reworking of continental crust in the subsurface Grenville orogen, Ohio, USA

“…Daly & McLelland 1991;McLelland et al, 1993;Van Schmus et al, 1996;Rohs & Van Schmus, 2007;Fisher at al, 2010). The Adirondacks have Nd-model ages between 1.55 and 1.0 Ga (the majority between 1.4 and 1.3 Ga; Daly & McLelland 1991;McLelland et al, 1993;Fisher at al, 2010). The Llano Uplift and the Franklin-and Van Horn Mountains yield zircon U-Pb ages between 1.28 and 1.07 Ga and corresponding Nd model ages from 1.44 to 1.11 Ga (Van Schmus et al, 1996;Fisher et al, 2010, and refs.…”

“…More recent work on the evolution of exposed Grenvillian aged rocks have focused on zircon U-Pb and whole-rock Sm-Nd analyses (i.e. Daly & McLelland 1991;McLelland et al, 1993;Van Schmus et al, 1996;Rohs & Van Schmus, 2007;Fisher at al, 2010). The Adirondacks have Nd-model ages between 1.55 and 1.0 Ga (the majority between 1.4 and 1.3 Ga; Daly & McLelland 1991;McLelland et al, 1993;Fisher at al, 2010).…”

“…Recent work on the evolution of rocks affected by Grenvillian orogenesis in the mid-continent have focused on zircon U-Pb and Sm-Nd analyses on the few available exposed outcrops (i.e. Daly & McLelland 1991;McLelland et al, 1993;Van Schmus et al, 1996;Rohs & Van Schmus, 2007;Fisher at al, 2010;Fig. 1).…”

The Las Matras tonalitic–trondhjemitic pluton, central Argentina: Grenvillian-age constraints, geochemical characteristics, and regional implications

“…The general juvenile character of magmas (Daly and McLelland, 1991;McLelland et al, 1993;Rivers, 1997) is a constant feature of the entire province.…”

Topographic architecture and drainage reorganization in Southeast China: Zircon U-Pb chronology and Hf isotope evidence from Taiwan

“…The U-Pb geochronology of detrital zircon grains in sandstones have been widely employed to trace provenance (Gaudette et al, 1981;Miller and Saleeby, 1995;Rainbird et al, 1997;Duan et al, 2011) and offers a better tool than the neodymium isotopes of mudstones, which can only provide an estimate of the mixed components source region (McLelland et al, 1993;McLennan et al, 2001). In this study, we discussed the provenances of Cenozoic rocks exposed in the Western Foothills and Hsuehshan Range using U-Pb age spectra and Hf isotope of detrital zircon grains from Cenozoic sandstones in Taiwan Range, (2) the provenance evolution and its tectonic implication for the Tertiary strata in Taiwan, and (3) the tectonics control on the early evolution of the regional fluvial systems and topography framework.…”