Archean detrital zircons in the Proterozoic Vishnu Schist of the Grand Canyon, Arizona : implications for crustal architecture and Nuna reconstructions

• Main Author: Shufeldt, Owen Philip
• Format: Text
• Language: English
• Published: UNM Digital Repository 2010
• Subjects: Precambrian geology; detrital zircons; Chasm; Antarc*; Antarctica
• Online Access: https://digitalrepository.unm.edu/eps_etds/81; https://digitalrepository.unm.edu/cgi/viewcontent.cgi?article=1080&context=eps_etds

U-Pb dating of 1035 detrital zircons from twelve spatially-distributed samples of the Paleoproterozoic Vishnu Schist reveals a bimodal 207Pb/ 206Pb age probability diagram with peaks at 1.8 Ga and 2.5 Ga. Surprisingly, only 13% of detrital zircon ages overlap with the published depositional age rang...