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首页> 外文期刊>Basin research >Jurassic rifting to post-rift subsidence analysis in the Central High Atlas and its relation to salt diapirism
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Jurassic rifting to post-rift subsidence analysis in the Central High Atlas and its relation to salt diapirism

机译：侏罗纪散步到中央高地图集的裂口后沉降分析及其与盐诊断的关系

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摘要

The subsidence evolution of the Tethyan Moroccan Atlas Basin, presently inverted as the Central High Atlas, is characterized by an Early Jurassic rifting episode, synchronous with salt diapirism of the Triassic evaporite-bearing rocks. Two contrasting regions of the rift basin - with and without salt diapirism - are examined to assess the effect of salt tectonics in the evolution of subsidence patterns and stratigraphy. The Djebel Bou Dahar platform to basin system, located in the southern margin of the Atlas Basin, shows a Lower Jurassic record of normal faulting and lacks any evidence of salt diapirism. In contrast, the Tazoult ridge and adjacent Amezra? basin, located in the centre of the Atlas Basin, reveals spectacular Early Jurassic diapirism. In addition, we analyse alternative Central High Atlas post-Middle Jurassic geohistories based on new thermal and burial models (GENEX? 4.0.3 software), constrained by new vitrinite reflectance data from the Amezra? basin. The comparison of the new subsidence curves from the studied areas with published subsidence curves from the Moroccan Atlas, the Saharan Atlas (Algeria) and Tunisian Atlas show that fast subsidence peaks were diachronous along the strike, being younger towards the east from Early-Middle Jurassic to Late Cretaceous. This analysis also evidences a close relationship between these high subsidence rate episodes and salt diapirism.
机译：Tethyan Moroccan地图集盆地的沉降演变，目前倒置为中央高地图集，其特征在于早期的侏罗纪脱脂情节，与三叠层蒸发岩岩石的盐滞下同步。研究了裂谷盆地的两个对比区域 - 有没有盐滞下的 - 被检查，以评估盐构造症在沉降模式和地层的演变中的作用。位于地图集盆地南部边缘的盆地系统的Djebel Bou Dahar平台显示出正常断裂的侏罗纪记录，缺乏​​盐诊断的任何证据。相比之下，Tazoult山脊和邻近的Amezra？盆地位于阿特拉斯盆地中心，揭示了壮观的早期侏罗纪颓废。此外，我们还根据新的热和埋葬模型（Genex 4.0.3软件）分析替代中央高地图集后侏罗纪地质，受到来自Amezra的新vitriinite反射数据的限制？盆地。从摩洛哥地图集的公布地区的新沉降曲线的比较来自摩洛哥地图集，撒哈拉地图集（阿尔及利亚）和突尼斯地图集表明，沿着罢工的快速沉降山峰，从早期侏罗纪朝东上更年轻晚白垩纪。该分析还证明了这些高沉降率发作和盐滞下的密切关系。

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  • 来源
    《Basin research》 |2018年第1期|共27页
  • 作者

    Mar Moragas; Jaume Vergés; Eduard Saura; Juan-Diego Martín-Martín; Grégoire Messager; óscar Merino-Tomé; Isabel Suárez-Ruiz; Philippe Razin; Carine Grélaud; Manon Malaval; Rémi Joussiaume; David William Hunt;

  • 作者单位

    Group of Dynamic of the Lithosphere (GDL) Institute of Earth Sciences Jaume Almera ICTJA-CSIC Barcelona Spain;

    Group of Dynamic of the Lithosphere (GDL) Institute of Earth Sciences Jaume Almera ICTJA-CSIC Barcelona Spain;

    Group of Dynamic of the Lithosphere (GDL) Institute of Earth Sciences Jaume Almera ICTJA-CSIC Barcelona Spain;

    Group of Dynamic of the Lithosphere (GDL) Institute of Earth Sciences Jaume Almera ICTJA-CSIC Barcelona Spain;

    Group of Dynamic of the Lithosphere (GDL) Institute of Earth Sciences Jaume Almera ICTJA-CSIC Barcelona Spain;

    Department of Geology Oviedo University Oviedo Spain;

    Instituto Nacional del Carbón (INCAR-CSIC) Oviedo Spain;

    ENSEGID Bordeaux INP G&

    E EA 4592 Pessac Cedex France;

    ENSEGID Bordeaux INP G&

    E EA 4592 Pessac Cedex France;

    ENSEGID Bordeaux INP G&

    E EA 4592 Pessac Cedex France;

    ENSEGID Bordeaux INP G&

    E EA 4592 Pessac Cedex France;

    Statoil TDP RDI CPR CP Bergen Norway §Department of Geology Oviedo University Oviedo Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 盆地、平原、草原;
  • 关键词

    Tethyan; presently inverted; characterized;

    机译：Tethyan;目前倒立;特征;

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