Pan-Continental River System Draining Grenville Orogen Recorded by U-Pb and Sm-Nd Geochronology of Neoproterozoic Quartzarenites and Mudrocks, Northwestern Canada

Maximum depositional age and provenance of the Uinta Mountain Group and Big Cottonwood Formation, northern Utah: Paleogeography of rifting western Laurentia

“…3). The ultimate source for these grains may be from Australia (e.g., Gawler Range Volcanics), but a more proximal and likely source could be reworked lower Belt Supergroup equivalents (e.g., Ross and Villeneuve, 2003;Link et al, 2007) and/or the Pinware terrane in northeastern Canada (Rainbird et al, 1997;Heaman et al, 2004). This grain-age population has thus far only been found in the middle part of the two successions (Uinta Mountain Group and Big Cottonwood Formation) and is associated with very prominent Grenvillian peaks; further analyses could reveal that this is a signifi cant detrital zircon stratigraphic-marker interval, perhaps indicating a regional paleogeographic change.…”

“…The Neoproterozoic Uinta Mountain Group (UMG) and correlative Big Cottonwood Formation (BCF) of northern Utah form a signifi cant part of this margin. These strata are included in Succession B of North America (>720 to <1000 Ma), which is hypothesized to record intracratonic basin development marking the early stages of the breakup of Rodinia (Stewart, 1972;Young et al, 1979Young et al, , 1981Rainbird et al, 1996Rainbird et al, , 1997. Until this study, these km-thick successions have lacked geochronologic control because they contain no known tuffaceous beds or microfossils with calibrated short stratigraphic ranges.…”

“…Maximum depositional ages obtained from the youngest zircon age populations are now known for Proterozoic basins on many continents (e.g., Ross et al, 1992;Rainbird et al, 1997;Evans et al, 2000;Southgate et al, 2000;Smithies et al, 2001;Goodge et al, 2002;Ross and Ville neuve, 2003;Jackson et al, 2005;Maclean et al, 2006;Cawood et al, 2007;Cross and Crispe, 2007;Link et al, 2007;Amato et al, 2008), although they do not always yield an age that represents the timing of deposition. Detrital zircon U-Pb age populations also provide fundamental provenance information toward under standing the paleogeographic development of Laurentia's Proterozoic rift margins, although data are limited for middle Neoproterozoic Laurentia (Rainbird et al, 1997;Stewart et al, 2001;Cawood et al, 2007).…”

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.…”

Early Proterozoic magmatism in Yukon, Canada: constraints on the evolution of northwestern Laurentia

“…Isotopic dating of detrital minerals and igneous rocks have, in recent years, provided first-order constraints on the Paleoproterozoic and Mesoproterozoic evolution of northwestern Laurentia (Ross et al 1992(Ross et al , 2001Anderson and Davis 1995;Sears et al 1998;Rainbird et al 1997;Ross and Villeneuve 1997;Doughty et al 1998). In contrast, the Neoproterozoic history of rifting is relatively well understood, with the Windermere Supergroup and correlative strata providing convincing evidence for extension, rift volcanism, rift-margin glaciation, and continental disunion (Ross 1991;Young 1995).…”