Supplemental Material: Geochronology of the Wrangell Arc: Spatial-temporal evolution of slab edge magmatism along a flat slab subduction-transform transition, Alaska-Yukon

• Main Authors: J.M. Trop (11273695), (281964)
• Format: Other Non-Article Part of Journal/Newspaper
• Language: unknown
• Published: 2021
• Subjects: Geochronology; Volcanology; Petrology - Sedimentary; Sedimentary Geology - Siliciclastics; Tectonophysics - Magmatism; Tectonics - Erosion and deposition; Petrology - Igneous; Deformation - Crustal; detrital geochronology; flat-slab subduction; slab-edge upwelling; volcanism; Wrangell Arc; Yakutat microplate; Yukon; Yakutat; Alaska
• Online Access: https://doi.org/10.1130/geos.s.15167367.v1

Item S1: Physiographic aspects of the Wrangell Arc that make bedrock sampling challenging, including scale of eruptive centers and glaciated, rugged, roadless terrain. Item S2: Photomicrographs of representative sand samples from modern rivers showing abundant volcanic lithic grains. Item S3: Modern river sediment sample location information. Item S4: Methods for calculating watershed boundaries, surface area of ice, surficial deposits, and bedrock, and geochronologic samples. Item S5: Summary of surface area of ice, surficial deposits, and bedrock within sampled watersheds. Item S6: 40 Ar/ 39 Ar and U-Pb analytical details. Item S7: New igneous bedrock 40 Ar/ 39 Ar fusion data. Item S8: Previously reported igneous bedrock data. Item S9: Detrital cobble-sized 40 Ar/ 39 Ar (DARL) fusion data. Item S10: Detrital sand-sized 40 Ar/ 39 Ar (DARL) step-heat data. Item S11: Detrital sand-sized volcanic-lithic 40 Ar/ 39 Ar (DARL) fusion data. Item S12: Detrital zircon (DZ) U-Pb age data. Item S13: Examples of differences between detrital zircon (DZ) vs. volcanic lithic (DARL) dates.