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Calner in China 2024

Mikael Calner

Professor

Calner in China 2024

Integrated conodont biostratigraphy and carbon isotope chemostratigraphy in the Lower–Middle Ordovician of southern Sweden reveals a complete record of the MDICE

Författare

  • RONGCHANG WU
  • MIKAEL CALNER
  • OLIVER LEHNERT

Summary, in English

One of the few and most complete records of the MDICE (Middle Darriwilian Isotope Carbon Excursion) is herein documented from Baltoscandia. Based on a core section penetrating the condensed Lower–Middle Ordovician succession (~46 m) on the island of Öland, southeastern Sweden, we provide an integrated scheme for carbon isotope chemostratigraphy (313 samples) and conodont biostratigraphy (29 samples) for this period. The carbonate succession in the Tingskullen core records 12 conodont zones and 6 subzones, including the Oepikodus evae, Trapezognathus diprion, Baltoniodus triangularis, B. navis, B. norrlandicus, Lenodus antivariabilis, L. variabilis, Yangtzeplacognathus crassus, Eoplacognathus pseudoplanus (Microzarkodina hagetiana and Microzarkodina ozarkodella subzones), E. suecicus, Pygodus serra (E. foliaceus, E. reclinatus, E. robustus and E. lindstroemi subzones) and Pygodus anserinus zones in ascending order. The δ13Ccarb record reveals an apparently complete record of the MDICE, including a rising limb, a well-defined peak and a falling limb. The anomaly covers a thickness of c. 27 m in the core and spans the Eoplacognathus pseudoplanus, E. suecicus, Pygodus serra and P. anserinus conodont zones. Combined with the new, detailed conodont biostratigraphy, the MDICE in the Tingskullen core can be used for detailed correlation with successions from Baltica, North America, the Argentine Precordillera, South China and North China.

Avdelning/ar

  • Berggrundsgeologi

Publiceringsår

2017-03

Språk

Engelska

Sidor

334-353

Publikation/Tidskrift/Serie

Geological Magazine

Volym

154

Issue

02

Dokumenttyp

Artikel i tidskrift

Förlag

Cambridge University Press

Ämne

  • Geology

Nyckelord

  • biostratigraphy
  • carbon isotope stratigraphy
  • conodonts
  • Ordovician
  • Sweden

Aktiv

Published

ISBN/ISSN/Övrigt

  • ISSN: 0016-7568