Evidence for prolonged mid-Paleozoic plutonism and ages of crustal sources in east-central Alaska from SHRIMP U-Pb dating of syn-magmatic, inherited, and detrital zircon

• Published in: Canadian Journal of Earth Sciences
• Main Authors: Dusel-Bacon, Cynthia, Williams, Ian
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: N R C Research Press
• Subjects: Keywords: Back arcs; Continental margins; Crustal sources; Detrital zircons; Grain populations; Late devonians; Magmatism; North americans; Orthogneisses; Paleozoic; Potential sources; Sensitive high-resolution ion microprobe; Subduction zones; Tectonic settings; U; Yukon; Quadrangle; Lake George; Tanacross; Alaska
• Online Access: http://hdl.handle.net/1885/49906; https://doi.org/10.1139/E09-005; https://openresearch-repository.anu.edu.au/bitstream/1885/49906/4/Dusel-Bacon_%2526_Williams_Evidence_2009.pdf.jpg; https://openresearch-repository.anu.edu.au/bitstream/1885/49906/5/01_Dusel-Bacon_Evidence_for_prolonged_2009.pdf.jpg

Sensitive high-resolution ion microprobe (SHRIMP) U-Pb analyses of igneous zircons from the Lake George assemblage in the eastern Yukon-Tanana Upland (Tanacross quadrangle) indicate both Late Devonian (∼370 Ma) and Early Mississippian (∼350 Ma) magmat