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Mid-Norian to Hettangian record and time-specific oolites during the end-Triassic Mass Extinction at Wadi Milaha, Musandam Peninsula, United Arab Emirates

Urban, Ingrid LU orcid ; Demangel, Isaline LU orcid ; Krystyn, Leopold ; Calner, Mikael LU orcid ; Kovács, Zsófia LU ; Gradwohl, Gerit ; Lernpeiss, Simon ; Maurer, Florian and Richoz, Sylvain LU (2023) In Journal of Asian Earth Sciences: X 9.
Abstract

The end-Triassic Mass Extinction (ETME) is generally regarded as a consequence of the environmental changes associated with the emplacement of the Central Atlantic Magmatic Province (CAMP) and ranks among the ‘big five’ mass extinctions in Earth history. A notable feature of the ETME is a halt in marine carbonate deposition followed by the formation of unusual facies such as carbonate cement fans and oolites in the early aftermath of the event. The ETME time interval has been well studied over the last few decades, in contrast to a few minor extinction events that preceded it, among them the extinctions associated with the Norian-Rhaetian boundary (NRB). This study provides new insights into these extinction events with complete... (More)

The end-Triassic Mass Extinction (ETME) is generally regarded as a consequence of the environmental changes associated with the emplacement of the Central Atlantic Magmatic Province (CAMP) and ranks among the ‘big five’ mass extinctions in Earth history. A notable feature of the ETME is a halt in marine carbonate deposition followed by the formation of unusual facies such as carbonate cement fans and oolites in the early aftermath of the event. The ETME time interval has been well studied over the last few decades, in contrast to a few minor extinction events that preceded it, among them the extinctions associated with the Norian-Rhaetian boundary (NRB). This study provides new insights into these extinction events with complete mid-Norian to Hettangian δ18Ocarb and δ13Ccarb record from a key section at Wadi Milaha (Ras Al Khaimah Emirate, United Arab Emirates). Ooids are important proxies for palaeoenvironmental reconstruction. The post ETME oolite horizon is documented providing morphological classification as well as a detailed modal analysis of rock components and different types of coated grains. Through a multi-technique approach, we argue for the stability of the carbon cycle across the NRB extinction event and the existence of a hiatus at the TJB (Triassic-Jurassic Boundary) in Wadi Milaha. Our new morphological classification of post-extinction ooids is compatible with a major role for seawater geochemistry with respect to sedimentological processes, by example in the peculiar way ooids diversify and alternate with other kinds of coated grains.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Arabian Platform, Chemostratigraphy, Modal analysis, Norian-Rhaetian Boundary, Ooids, Triassic-Jurassic Boundary
in
Journal of Asian Earth Sciences: X
volume
9
article number
100138
publisher
Elsevier
external identifiers
  • scopus:85146713509
ISSN
2590-0560
DOI
10.1016/j.jaesx.2023.100138
language
English
LU publication?
yes
id
06725e24-fc00-4e3b-8258-8eee945eb9f3
date added to LUP
2023-02-09 15:51:01
date last changed
2024-03-19 09:38:51
@article{06725e24-fc00-4e3b-8258-8eee945eb9f3,
  abstract     = {{<p>The end-Triassic Mass Extinction (ETME) is generally regarded as a consequence of the environmental changes associated with the emplacement of the Central Atlantic Magmatic Province (CAMP) and ranks among the ‘big five’ mass extinctions in Earth history. A notable feature of the ETME is a halt in marine carbonate deposition followed by the formation of unusual facies such as carbonate cement fans and oolites in the early aftermath of the event. The ETME time interval has been well studied over the last few decades, in contrast to a few minor extinction events that preceded it, among them the extinctions associated with the Norian-Rhaetian boundary (NRB). This study provides new insights into these extinction events with complete mid-Norian to Hettangian δ<sup>18</sup>O<sub>carb</sub> and δ<sup>13</sup>C<sub>carb</sub> record from a key section at Wadi Milaha (Ras Al Khaimah Emirate, United Arab Emirates). Ooids are important proxies for palaeoenvironmental reconstruction. The post ETME oolite horizon is documented providing morphological classification as well as a detailed modal analysis of rock components and different types of coated grains. Through a multi-technique approach, we argue for the stability of the carbon cycle across the NRB extinction event and the existence of a hiatus at the TJB (Triassic-Jurassic Boundary) in Wadi Milaha. Our new morphological classification of post-extinction ooids is compatible with a major role for seawater geochemistry with respect to sedimentological processes, by example in the peculiar way ooids diversify and alternate with other kinds of coated grains.</p>}},
  author       = {{Urban, Ingrid and Demangel, Isaline and Krystyn, Leopold and Calner, Mikael and Kovács, Zsófia and Gradwohl, Gerit and Lernpeiss, Simon and Maurer, Florian and Richoz, Sylvain}},
  issn         = {{2590-0560}},
  keywords     = {{Arabian Platform; Chemostratigraphy; Modal analysis; Norian-Rhaetian Boundary; Ooids; Triassic-Jurassic Boundary}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Asian Earth Sciences: X}},
  title        = {{Mid-Norian to Hettangian record and time-specific oolites during the end-Triassic Mass Extinction at Wadi Milaha, Musandam Peninsula, United Arab Emirates}},
  url          = {{http://dx.doi.org/10.1016/j.jaesx.2023.100138}},
  doi          = {{10.1016/j.jaesx.2023.100138}},
  volume       = {{9}},
  year         = {{2023}},
}