Provenance of Late Paleozoic-Mesozoic sandstones, Taimyr Peninsula, Arctic

• Main Authors: Zhang, Xiaojing, Omma, Jenny, Pease, Victoria, Scott, Robert
• Format: Report
• Language: English
• Published: Stockholms universitet, Institutionen för geologiska vetenskaper
• Subjects: provenance; heavy minerals; detrital zircons; Uralian orogen; Geology; Geologi; Arctic; Verkhoyansk; Taimyr
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-89450

The sedimentary and provenance characteristics of seven Permo-Carboniferous and two early Cretaceous samples from the Taimyr Peninsula provide information about the latest evolution of Uralian Orogeny. The Permo-Carboniferous samples have a mixed provenance of recycled and first cycle sediment, sourced from metamorphic and igneous terranes. U-Pb detrital zircon ages represent a mixture of Precambrian-Paleozoic grains with euhedral, penecontemporaneous late Carboniferous and Permian grains consistent with derivation from the Uralian and Timanian orogens, plus additional Caledonian material presumably derived from Baltica. There are distinct differences between the late Permian sample and the other Carboniferous and early Permian samples, interpreted to reflect the final collisional stage of Uralian Orogeny. Early Cretaceous sediments deposited when the Amerasian Basin opened preserve a mixed provenance of metamorphic and igneous source material of mainly first cycle detritus, as well as an unstable heavy mineral assemblage dominated by staurolite, suggesting local derivation. Detrital zircon ages fall almost exclusively into one late Permian-early Triassic cluster, indicating no relationship with the Cretaceous Verkhoyansk fold belt.