A delayed end-Permian extinction in deep-water locations and its relationship to temperature trends (Bianyang, Guizhou Province, South China)

A delayed end-Permian extinction in deep-water locations and its relationship to temperature trends (Bianyang, Guizhou Province, South China)
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深水区二叠纪末期延迟灭绝及其与温度趋势的关系(华南贵州省汴阳市)

DOI:
10.1016/j.palaeo.2015.10.002
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发表时间:
2015-12
期刊:
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子:
--
通讯作者:
Xulong Lai
Xulong Lai
中科院分区:
其他
文献类型:
--
作者:
Michael M. Joachimski;Paul B. Wignall;Muhui Zhang;Xulong Lai

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在中国南部一个生物地层学高度分辨的深水剖面上的新采集,揭示了与同时代的浅水剖面相比,物种灭绝时间的短暂(数万年)但可测量的延迟。卞阳剖面的有孔虫和牙形刺在Hindeodus Changxingens带的顶部表现出急剧的灭绝,而在较浅的剖面,如著名的眉山GSSP位置,这些分类群在先前的Clarina yini带的顶部有一个主要的灭绝脉冲。二叠纪末期的主要灭绝与碳同位素负漂移的开始相吻合,而深水灭绝发生在碳同位素曲线的低点附近。地表水温迅速升高以及深水缺氧的影响在危机期间都很重要,但值得注意的是,退化和灭绝也显示出密切的时间联系。
New collecting at a biostratigraphically highly-resolved deep-water section in South China, reveals a brief (a few tens of thousands of years) but measurable delay in extinction timing relative to contemporaneous, shallower water sections. Foraminifers and conodonts in the Bianyang section show a sharp extinction at the top ofHindeodus changxingensisZone, whilst in shallower sections, such as the well-known Meishan GSSP location, these taxa have a major extinction pulse at the top of the precedingClarkina yiniZone. The main end-Permian extinction coincides with the onset of a negative carbon isotope excursion whilst the deep-water extinctions occur around the lowpoint of the carbon isotope curve. Rapidly increasing surface water temperatures, and the effects of deep-water anoxia were all important during the crisis although it is noteworthy that regression and extinction also show a close temporal link.
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