Growth and demise episodes of a Middle-Late Jurassic carbonate platform (Ouarsenis Mountains, northwestern Algeria)
Sadji R, Munnecke A, Santantonio M, Ramdane N, Nemra A, Belkhedim S (2025)
Publication Type: Journal article
Publication year: 2025
Journal
DOI: 10.1007/s00531-025-02531-0
Abstract
The Middle-Late Jurassic carbonate succession from the Ouarsenis Mountains (NW Algeria) is characterized by shallow-water to pelagic deposits. During this time span the carbonate platform underwent successive periods of growth and demise of carbonate production within different depositional environments. These phases have been correlated to previously published carbon curves from the Ouarsenis Mountains, seawater temperatures, local tectonics and the global standard sea-level curve. The Callovian deposits indicate a lagoonal environment with oligotrophic conditions documenting a healthy carbonate platform in the Tiaret sector, and a storm-dominated environment in the Tissemsilt sector. The transition to the middle Oxfordian is characterized by a mixture of products of the benthic and pelagic factories, representing the drowning succession phase developed under eutrophic conditions. The appearance of the Ammonitico Rosso can be ascribed to the middle Oxfordian. Increase of detrital input during the late Oxfordian hampered the carbonate production efficiency, consequently this time span represents a period of carbonate production demise, which is concomitant with a negative carbon excursion, mirrored by marl-limestone alternations. This period of carbonate production demise persisted until the Bimammatum Zone. The Kimmeridgian represents another period of carbonate growth documenting inner to mid ramp environments in the Tiaret sector, whereas micritic limestones with Saccocoma and pelagic foraminifera in the Tissemsilt sector were deposited in an open marine environment. This period is accompanied by a minor positive excursion. The lower Tithonian displays another phase of carbonate production demise, mirrored by a lithofacies change, while stable carbon isotopes show the lowest values.
Authors with CRIS profile
Involved external institutions
Université d'Oran 2 Mohamed Ben Ahmed / 2 جامعة وهران
Algeria (DZ)
Università degli studi "La Sapienza"
Italy (IT)
University of Science and Technology Houari Boumediene
Algeria (DZ)
Algeria (DZ)
Università degli studi "La Sapienza"
Italy (IT)
University of Science and Technology Houari Boumediene
Algeria (DZ)
How to cite
APA:
Sadji, R., Munnecke, A., Santantonio, M., Ramdane, N., Nemra, A., & Belkhedim, S. (2025). Growth and demise episodes of a Middle-Late Jurassic carbonate platform (Ouarsenis Mountains, northwestern Algeria). International Journal of Earth Sciences. https://doi.org/10.1007/s00531-025-02531-0
MLA:
Sadji, Radouane, et al. "Growth and demise episodes of a Middle-Late Jurassic carbonate platform (Ouarsenis Mountains, northwestern Algeria)." International Journal of Earth Sciences (2025).
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