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 S.
• Other Authors: Davis, Bill
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 2009
• Subjects: General Earth and Planetary Sciences; Yukon; Hayes; Quadrangle; Lake George; Mount Hayes; alaska range; Tanacross; Alaska
• Online Access: http://dx.doi.org/10.1139/e09-005; http://www.nrcresearchpress.com/doi/full-xml/10.1139/E09-005; http://www.nrcresearchpress.com/doi/pdf/10.1139/E09-005

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) magmatic pulses. The zircons occur in four textural var...