The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Sylvain Richoz

Sylvain Richoz

Senior lecturer

Sylvain Richoz

The Buday'ah Formation, Sultanate of Oman : A Middle Permian to Early Triassic oceanic record of the Neotethys and the late Induan microsphere bloom

Author

  • Aymon Baud
  • Sylvain Richoz
  • Benoit Beauchamp
  • Fabrice Cordey
  • Stephen Grasby
  • Charles M. Henderson
  • Leopold Krystyn
  • Alda Nicora

Summary, in English

The Middle Permian to Lower Triassic Buday'ah section, exposed in the Oman Mountains, is the first deep-sea section to be described in the Neotethys. The oceanic sediments were deposited along the southern Tethys margin in the newly formed Hawasina Basin. It is one of the few places where true Tethyan Permian radiolarites are exposed that allow the documentation of CCD evolution through time. The succession begins as oceanic crust pillow basalt with red ammonoid-rich pelagic limestone occurring both above and within inter-pillow cavities; the new occurrence of Clarkina postbitteri hongshuiensis indicates a late Capitanian age for the carbonate. The sharp change to overlying late Capitanian to Changhsingian radiolarite reflects rapid subsidence about 10. Myrs after initial continental breakup that resulted in the formation of the Neotethys Ocean. New conodonts indicate that the Permian-Triassic boundary succession occurs in the first platy lime mudstone beds above a Changhsingian siliceous to calcareous shale unit. The platy lime mudstone beds include an Upper Griesbachian bloom of calcite filled spheres (radiolarians?) that marks a potential world-wide event. New conodonts indicate an early Olenekian age for overlying grey papery limestone that are devoid of both macrofossils and trace fossils indicating that recovery from the Late Permian extinction has not yet progressed within this deep-water environment.δ13Corg, isotope values have not been disturbed and they show a negative shift just below the Permian-Triassic transition and a second one at the parvus zone level above. The Buday'ah succession may represent the most distal and probably deepest Permian and Lower Triassic depositional sequence within the basin.

Publishing year

2012-01-01

Language

English

Pages

130-144

Publication/Series

Journal of Asian Earth Sciences

Volume

43

Issue

1

Document type

Journal article

Publisher

Elsevier

Keywords

  • Chemostratigraphy
  • Chert
  • Conodonts
  • Lower Triassic
  • Permian
  • Platy and papery limestone
  • Radiolaria

Status

Published

ISBN/ISSN/Other

  • ISSN: 1367-9120