Turonian carbonate succession in central-southern Tunisia: Insights into depositional environments, sequence stratigraphy and south Tethyan margin correlations

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research Pub Date : 2024-12-28 DOI:10.1016/j.cretres.2024.106074

Dhouha Jomaa Salmouna , Najeh Ben Chaabane , Ferid Dhahri , Abdellatif Salmouna

{"title":"Turonian carbonate succession in central-southern Tunisia: Insights into depositional environments, sequence stratigraphy and south Tethyan margin correlations","authors":"Dhouha Jomaa Salmouna , Najeh Ben Chaabane , Ferid Dhahri , Abdellatif Salmouna","doi":"10.1016/j.cretres.2024.106074","DOIUrl":null,"url":null,"abstract":"<div><div>New sedimentological studies and sequence stratigraphic framework of the Turonian deposits, in Tunisia, were conducted to facilitate the reading of the local stratigraphic nomenclature by comparing it with the global stratigraphic data. A new sequence stratigraphic subdivision of the Turonian interval has been proposed, based on the lithological and paleontological characteristics from Berda, Chemsi, Orbata and Belkhir sections (Gafsa area).</div><div>A detailed sedimentological investigation of the Bireno carbonates, correlated later on with other sections (northern Chotts, Sidi Bouzid, and Kasserine areas), has allowed to recognize three facies associations. They are distributed along a ramp system, evolving from proximal to distal domain and highlighting a northward deepening, well evidenced by isopach and paleogeographic maps.</div><div>Four 3rd order sequences (S-1 to S-4) have been identified; they correspond to the Bahloul Formation (lowest Turonian), the Gattar and Annaba Members (lower Turonian), the Bireno Member (lower Turonian to upper Turonian), and the Lower Aleg Member (uppermost Turonian). The most transgressive intervals correspond to the Bahloul Formation (mfs1), the Annaba Member (mfs2) and the upper B2 unit (mfs3).</div><div>The regressive ones correspond to the Gattar member, B1, B3 and B4 units. This subdivision has allowed the tracing of reasonable timelines and the correlation of the Tunisian Turonian deposits with their analogues in the southern Tethyan margin.</div><div>This study will significantly help to improve the conception of stratigraphic architecture and the depositional morphology at the scale of the southern Tethyan margin.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"168 ","pages":"Article 106074"},"PeriodicalIF":1.9000,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cretaceous Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0195667124002477","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

New sedimentological studies and sequence stratigraphic framework of the Turonian deposits, in Tunisia, were conducted to facilitate the reading of the local stratigraphic nomenclature by comparing it with the global stratigraphic data. A new sequence stratigraphic subdivision of the Turonian interval has been proposed, based on the lithological and paleontological characteristics from Berda, Chemsi, Orbata and Belkhir sections (Gafsa area).

A detailed sedimentological investigation of the Bireno carbonates, correlated later on with other sections (northern Chotts, Sidi Bouzid, and Kasserine areas), has allowed to recognize three facies associations. They are distributed along a ramp system, evolving from proximal to distal domain and highlighting a northward deepening, well evidenced by isopach and paleogeographic maps.

Four 3rd order sequences (S-1 to S-4) have been identified; they correspond to the Bahloul Formation (lowest Turonian), the Gattar and Annaba Members (lower Turonian), the Bireno Member (lower Turonian to upper Turonian), and the Lower Aleg Member (uppermost Turonian). The most transgressive intervals correspond to the Bahloul Formation (mfs1), the Annaba Member (mfs2) and the upper B2 unit (mfs3).

The regressive ones correspond to the Gattar member, B1, B3 and B4 units. This subdivision has allowed the tracing of reasonable timelines and the correlation of the Tunisian Turonian deposits with their analogues in the southern Tethyan margin.

This study will significantly help to improve the conception of stratigraphic architecture and the depositional morphology at the scale of the southern Tethyan margin.

查看原文本刊更多论文

对突尼斯图伦纪沉积物进行了新的沉积学研究和层序地层学框架，以便通过与全球地层学数据进行比较，解读当地的地层命名法。根据 Berda、Chemsi、Orbata 和 Belkhir 剖面（加夫萨地区）的岩石学和古生物学特征，提出了图伦纪区间新的层序地层划分方法。对 Bireno 碳酸盐岩进行了详细的沉积学调查，并随后与其他剖面（乔特斯北部、西迪布齐德和卡塞林地区）进行了关联，从而确认了三个面系。它们沿着一个斜坡系统分布，从近端向远端演化，并突出向北加深，这一点在等深线和古地理图上得到了很好的证明。已经确定了四个三阶序列（S-1 至 S-4）；它们分别对应于巴赫卢勒地层（最低都龙纪）、加塔尔和安纳巴岩层（下都龙纪）、比雷诺岩层（下都龙纪至上都龙纪）以及下阿雷格岩层（最上都龙纪）。其中，最大的递变层间与巴赫卢尔地层（mfs1）、安纳巴层（mfs2）和上B2单元（mfs3）相对应，递减层间与加塔尔层、B1、B3和B4单元相对应。这项研究将大大有助于改善地层结构的概念和泰特山脉南缘的沉积形态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Cretaceous Research 地学-地质学

CiteScore

4.10

自引率

19.00%

发文量

235

审稿时长

12 weeks

期刊介绍： Cretaceous Research provides a forum for the rapid publication of research on all aspects of the Cretaceous Period, including its boundaries with the Jurassic and Palaeogene. Authoritative papers reporting detailed investigations of Cretaceous stratigraphy and palaeontology, studies of regional geology, and reviews of recently published books are complemented by short communications of significant new findings. Papers submitted to Cretaceous Research should place the research in a broad context, with emphasis placed towards our better understanding of the Cretaceous, that are therefore of interest to the diverse, international readership of the journal. Full length papers that focus solely on a local theme or area will not be accepted for publication; authors of short communications are encouraged to discuss how their findings are of relevance to the Cretaceous on a broad scale. Research Areas include: • Regional geology • Stratigraphy and palaeontology • Palaeobiology • Palaeobiogeography • Palaeoceanography • Palaeoclimatology • Evolutionary Palaeoecology • Geochronology • Global events.