Chapter 37 U–Pb SIMS zircon geochronology of Triassic and Jurassic sandstones on northwestern Axel Heiberg Island, northern Sverdrup Basin, Arctic Canada

• Main Authors: J. E. Omma, V. Pease, R. A. Scott
• Format: Other Non-Article Part of Journal/Newspaper
• Language: unknown
• Published: 2016
• Subjects: Geology; source; sediment dispersal patterns; Barents Shelf region; Sverdrup Basin; Arctic; Jurassic sample; zircon; Triassic; Axel Heiberg Island; sandstone; SIMS; Middle Jurassic samples; Arctic Ocean; Canada; Greenland; Heiberg; New Siberian Islands; sverdrup basin; Taimyr
• Online Access: https://doi.org/10.6084/m9.figshare.3452888; https://figshare.com/articles/Chapter_37_U_Pb_SIMS_zircon_geochronology_of_Triassic_and_Jurassic_sandstones_on_northwestern_Axel_Heiberg_Island_northern___Sverdrup_Basin_Arctic_Canada/3452888

Detrital U–Pb zircon age data from five stratigraphically controlled Mesozoic sandstones collected from a relatively continuous section in northwestern Axel Heiberg Island are used to evaluate the sediment dispersal patterns and source areas of the northern Sverdrup Basin. Three distinctive provenance types are identified. Early Triassic, Late Triassic and Middle Jurassic samples are dominated by Permo-Triassic zircons and are inferred to be derived from the Taimyr Peninsula/Polar Urals, the New Siberian Islands or some unexposed source submerged beneath the Arctic Ocean. The presence of chrome spinel in these samples suggests a component of mafic–ultramafic material in the source. An Early Jurassic sample is dominated by late Neoproterozoic–early Silurian zircons, which correlate with the Caledonian and Timanian orogens of the Barents Shelf region. A Late Jurassic sample is dominated by Meso-, Palaeoproterozoic and Archaean zircons interpreted to be sourced from the Canada–Greenland shield.