Detrital zircon populations in Ediacaran Period sediments distinguish active from passive continent margins even when metamorphosed and help resolve the Gondwana-Panotia supercontinent/megacontinent argument

• Autorzy: Crow Michael , Zaw Khin , Thu Kyaw , Belousov Ivan , Goemann Karsten
• Konferencja: Western Tethys meets Eastern Tethys - geodynamical, palaeoceanographical and palaeobiogeographical events : Second Symposium of the International Geoscience Programme IGCP 710 : 28th August - 3rd September, 2023, Kraków, Poland : abstract book
• Języki publikacji: EN

Abstrakty

EN

Great thicknesses of sand and greywacke were deposited on the margins of megacontinents during the Ediacaran Period (620–542 Ma). Zircon age populations in sediments with long deep-time flat profiles distinguish passive margin sedimentation from shorter humped zircon profiles characteristic of sediments derived from volcanic arcs and their feeder zones in active margins. An example of a single hump detrital profile is given by an Ediacaran Period volcano present in the Charnian Supergroup in the Anglo-Brabant Massif of the East Avalonia terrane. This Gondwana fragment was originally part of the West Africa craton and was subsequently accreted to Laurentia. A volcanic complex with sediments carrying an Ediacaran biota is overlain by Triassic sediments. The main phase of eruption at c. 561 Ma provides a single hump zircon age histogram with a few pre-eruption zircon xenocrysts up to 40 Ma older

Słowa kluczowe

EN

sediments; Gondwana; zircon

PL

osady; Gondwana; cyrkon

• Wydawca: Wydawnictwa AGH ; Stowarzyszenie Naukowe im. Stanisława Staszica
• Czasopismo: Geotourism / Geoturystyka
• Rocznik: 2023
• Tom: nr 1-2 (72-73)
• Strony: 16--17
• Opis fizyczny: Bibliogr. 1 poz., rys.

Twórcy

autor

Crow Michael

• 28A Lenton Road, The Park, Nottingham NG7 1DT, United Kingdom

autor

Zaw Khin

• CODES Centre of Ore Deposit and Earth Sciences, University of Tasmania, Private Bag 126, Hobart, Tasmania 7001, Australia

autor

Thu Kyaw

• S Gemmological Institute, No.001-2, 007-8, Ground Floor Condo B, University Avenue Housing, New University Avenue Road, Bahan Township (11201), Yangon, Myanmar

autor

Belousov Ivan

• CODES Centre of Ore Deposit and Earth Sciences, University of Tasmania, Private Bag 126, Hobart, Tasmania 7001, Australia

autor

Goemann Karsten

• Central Science Laboratory, University of Tasmania, Private Bag 74, Hobart, Tasmania 7001, Australia

Bibliografia

• [1] Zoleikhaei Y., Mulder J.A. & Cawood P.A., 2021. Integrated detrital rutile and zircon provenance reveals multiple sources for Cambrian sandstones in North Gondwana. Earth-Science Reviews, 213: 103462. https://doi.org/10.1016/j.earscirev.2020.103462.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).