1997) suggested that sandstones of this age exposed on Victoria Island, in the western Arctic, were derived by erosion of the Grenville orogen 3000 km to the east, based on U-Pb and Sm-Nd geochronology of the detrital components.
1997, Pan-continental river system draining Grenville Orogen recorded by U-Pb and Sm-Nd geochronology of Neoproterozoic quartzarenites and mudrocks, northwestern Canada: Journal of Geology, v.
They are located in a back-arc setting to the evolving Grenville Orogen (Rivers et al.
22 Ga events along the Grenville Orogen have not been previously linked to each other and more work is required to assess whether they represent disparate elements of the same event.
Emplacement of the Keweenawan LIP is similar in age to that of terminal collision of the Grenville orogen (Rivers et al.
See Note 1, below) A2 Coexisting with arc magmatism HOTSPOT (OF UNSPECIFIED ORIGIN) H1 Small (sub-LIP scale) region of anomalous intraplate mafic volcanism Note 1: The Keweenawan rift activity is arguably in a back-arc setting with respect to the Grenville orogen, yet it is generally viewed that the Keweenawan magmatism is plume-related (see discussion in text).
The Grenville Province comprises the exposed part of the late Mesoproterozoic Grenville orogen, which extends in the subsurface and in isolated outliers southwest as far as Texas (Fig.
Numerical modelling of tectonic extrusion suggests that hot wide orogens are the sites of massive crustal-scale horizontal displacements and shortening along gently dipping shear zones, compatible with the LITHOPROBE images of the Grenville orogen.
The 600 km wide Grenville orogen extends from Scandinavia to Texas and developed over a 200 Ma time span.
2000, Geologic transect across the Grenville Orogen of Ontario and New York.
1997, Transect across the northwestern Grenville orogen, Georgian Bay, Ontario: polystage convergence and extension in lower orogenic crust: Tectonics, v.