Paleoproterozoic suture zones mark the formation of supercontinent Nuna and provide a record of North America's assembly. Conspicuously young ages (ca. 1.715 Ga) associated with deformation in southeast Wyoming craton argue for a more protracted consolidation of Laurentia, long after peak metamorphism in the Trans-Hudson orogen. Using paleomagnetic data from the newly dated 1899 ± 5 Ma Sourdough mafic dike swarm (Wyoming craton), we compare the relative positions of Wyoming, Superior, and Slave cratons before, during, and after peak metamorphism in the Trans-Hudson orogen. With these constraints, we refine a collisional model for Laurentia that incorporates Wyoming craton after Superior and Slave cratons united, redefining the Paleoproterozoic sutures that bind southern Laurentia.

Additional Metadata
Persistent URL dx.doi.org/10.1130/G38042.1
Journal Geology
Citation
Kilian, T.M. (Taylor M.), Chamberlain, K.R. (Kevin R.), Evans, D.A. (David A.D.), Bleeker, W. (Wouter), & Cousens, B. (2016). Wyoming on the run-Toward final Paleoproterozoic assembly of Laurentia. Geology, 44(10), 863–866. doi:10.1130/G38042.1