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首页> 外文期刊>Journal of Asian earth sciences >The Buday'ah Formation, Sultanate of Oman: A Middle Permian to Early Triassic oceanic record of the Neotethys and the late Induan microsphere bloom
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The Buday'ah Formation, Sultanate of Oman: A Middle Permian to Early Triassic oceanic record of the Neotethys and the late Induan microsphere bloom

机译：阿曼苏丹国Buday'ah地层：新特提斯和印支晚期微球开花的中二叠纪至三叠纪早期海洋记录

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摘要

The Middle Permian to Lower Triassic Buday'ah section, exposed in the Oman Mountains, is the first deep sea section to be described in the Neotethys. The oceanic sediments were deposited along the southern Tethys margin in the newly formed Hawasina Basin. It is one of the few places where true Tethyan Permian radiolarites are exposed that allow the documentation of CCD evolution through time. The succession begins as oceanic crust pillow basalt with red ammonoid-rich pelagic limestone occurring both above and within inter-pillow cavities; the new occurrence of Clarkina postbitteri hongshuiensis indicates a late Capitanian age for the carbonate. The sharp change to overlying late Capitanian to Changhsingian radiol arite reflects rapid subsidence about 10 Myrs after initial continental breakup that resulted in the forma tion of the Neotethys Ocean. New conodonts indicate that the Permian-Triassic boundary succession occurs in the first platy lime mudstone beds above a Changhsingian siliceous to calcareous shale unit. The platy lime mudstone beds include an Upper Griesbachian bloom of calcite filled spheres (radiolari ans?) that marks a potential world-wide event. New conodonts indicate an early Olenekian age for over lying grey papery limestone that are devoid of both macrofossils and trace fossils indicating that recovery from the Late Permian extinction has not yet progressed within this deep-water environment. δ13C_(org), isotope values have not been disturbed and they show a negative shift just below the Permian Triassic transition and a second one at the pan/us zone level above. The Buday'ah succession may represent the most distal and probably deepest Permian and Lower Triassic depositional sequence within the basin.
机译：暴露于阿曼山脉的中二叠纪至下三叠纪Buday'ah段是新特提斯描述的第一个深海段。海洋沉积物沿新形成的哈瓦西纳盆地的特提斯南部边缘沉积。这是真正的特提斯二叠纪放射虫暴露的少数几个地方，可以记录随着时间​​的推移CCD演变。演替始于洋壳枕玄武岩，枕间腔的上方和内部都出现了富含红色铵盐的上层石灰岩。新出现的红水克拉克丁藻表明该碳酸盐的Capitanian晚期。上卡皮塔尼亚晚期至昌兴期的放射性芳烃的急剧变化反映了最初的大陆分裂后大约10 Myrs的快速沉降，这导致了新特提斯洋的形成。新的牙形石表明，二叠纪-三叠纪边界演替发生在昌兴期硅质至钙质页岩单元上方的第一片板状灰泥岩床中。片状石灰质泥岩床包括方解石填充球体（Radiolari ans？）的上格里斯巴赫式绽放，标志着潜在的全球性事件。新的牙形石表明，在灰色的纸质石灰石上没有灰石化石和痕迹化石，这表明它处于早奥林尼克时代，这表明在这种深水环境中，尚未从二叠纪灭绝中恢复。 δ13​​C_（org）的同位素值并未受到干扰，它们在二叠纪三叠纪转变以下显示出负向偏移，而在以上泛/我们带水平则显示出第二个偏移。 Buday'ah演替可能代表了盆地内最远端，可能是最深的二叠纪和下三叠纪沉积序列。

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  • 来源
    《Journal of Asian earth sciences》 |2012年第1期|p.130-144|共15页
  • 作者

    Aymon Baud; Sylvain Richoz; Benoit Beauchamp; Fabrice Cordey; Stephen Grasby; Charles M. Henderson; Leopold Krystyn; Alda Nicora;

  • 作者单位

    BGC, Rouvraie 28, CH-1018 Lausanne, Switzerland;

    Commission for the Palaeontological and Stratigraphical Research of Austria, Austrian Academyrs of Sciences c/o Institute of Earth Sciences, University of Graz,Heinrichstrafie 26, 8010 Craz, Austria;

    Department of Ceoscience, University of Calgary, 2500 University Drive, N.W.Calgary, Alberta, Canada T2N 1N4;

    Departement Sciences de la Terre, CNRS UMR 5125 Paleoenvironnements Paleobiosphere, Universite Lyon 1, 69622 Villeurbanne, France;

    Geological Survey of Canada - Calgary, 3303 33rd Street, N.W. Calgary, Alberta, Canada T2L 2A7;

    Department of Ceoscience, University of Calgary, 2500 University Drive, N.W.Calgary, Alberta, Canada T2N 1N4;

    Department of Palaeontology, Vienna University, Althanstrasse 14, 1090 Vienna, Austria;

    Dipartimento di Scienze della Terra, Universita degli Studi di Milano, Via Mangiagalli 34, Milano 20133, Italy;

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  • 正文语种 eng
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  • 关键词

    permian; lower triassic; chert; radiolaria; conodonts; chemostratigraphy; platy and papery limestone;

    机译：二叠纪下三叠纪;燧石;放射虫牙形石化学书画板状和纸质石灰石;

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