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Communication Dans Un Congrès Année : 2019

The stratigraphic record of the Middle-Late Jurassic Transition events on the Peri-Tethyan carbonate platforms

Raphaël Bourillot
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Mehdi Carmeille
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Pierre Pellenard
Philippe Razin
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Résumé

The Middle and Upper Jurassic peri-Tethyan carbonate platforms host some of the largest hydrocarbon reserves in the world. Over the past decades, extensive research has led to the construction of high-resolution stratigraphic frameworks on the northwestern (e.g., Paris Basin) and southern (e.g., Arabian Platform) Tethyan margins. These studies and others show that although being a period of elevated carbonate production, the Callovian-Oxfordian interval is marked by major changes in carbonate production and platform architecture, stratigraphic gaps and condensed series. These changes have commonly been linked to regional to global climatic and tectonic events associated with the so-called Middle-Late Jurassic Transition (MLJT). The stratigraphy of the northern Tethyan margin (Central Asia) was comparatively less documented. A vast carbonate platform developing on the northern margin of the Amu Darya Basin was recently investigated. A high-resolution stratigraphic framework of the platform was built based on facies analyses, sequence stratigraphy, chemostratigraphy and biostratigraphy. This presentation reviews the key stratigraphic features of the Callovian-Oxfordian carbonate platforms in several areas of the northern, western and southern Tethyan margins. Our comparison shows striking similarities in the stratigraphic records of carbonate platforms which developed at the periphery of the Tethys, several thousands of kilometers apart and reinforce the hypothesis that global-scale events strongly affected the shallow water domain of the Jurassic ocean. The impact of climate, tectonics and major paleoenvironmental events, e.g. the Upper Callovian-Lower Oxfordian cold episode, the sea level fall possibly linked to glacio-eustatism and the tectonic events are finally discussed.
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Dates et versions

hal-03980169 , version 1 (09-02-2023)

Identifiants

  • HAL Id : hal-03980169 , version 1

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Raphaël Bourillot, Mehdi Carmeille, Pierre Pellenard, Marie-Françoise Brunet, Philippe Razin. The stratigraphic record of the Middle-Late Jurassic Transition events on the Peri-Tethyan carbonate platforms. PG Hydrocarbons in Space And Time, Geological Society of London Conference, Apr 2019, Londres, United Kingdom. ⟨hal-03980169⟩
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