Devonian events: examples from the eastern Palaeotethys (Si Phai section, NE Vietnam)
Devonian events: examples from the eastern Palaeotethys (Si Phai section, NE Vietnam)
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DOI：
10.1007/s12549-017-0272-5
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发表时间：
2017-03
影响因子：
1.4
通讯作者：
P. Königshof;K. Narkiewicz;P. T. Hoa;S. Carmichael;J. Waters
中科院分区：
文献类型：
--
作者：
P. Königshof;K. Narkiewicz;P. T. Hoa;S. Carmichael;J. Waters
最近对越南东北部东货车地区中上泥盆统沉积物的研究揭示了Si Phai剖面地层记录和全球泥盆纪生物事件的新的、更详细的信息。在越南发现了四个可能的不同规模的著名泥盆纪事件的等价物，这是一个在这方面代表性不足的地区：（？）卡恰克事件（？）pumilio事件、中吉维特晚期Taghanic事件和Frasnian/Famennian Kellwasser事件。Si Phai剖面的地层框架使我们能够识别和评估越南全球泥盆纪生物事件的时间，即使该剖面不连续。简要讨论了Si Phai剖面的沉积学发展概况，该剖面中的碳酸盐岩由泥质石灰岩组成，表明相对较深的离岸条件。由于相背景，大型底栖动物一般是罕见的，牙形石记录同样是有限的，在某些地方。然而，在越南首次有可能确定一些全球事件的间隔。
Recent study of Middle to Upper Devonian deposits in the Dong Van area, northeast Vietnam, has revealed new, more detailed information of both the stratigraphic record of the Si Phai section and global Devonian bioevents. Four possible equivalents of well-known Devonian events of different magnitude were found in Vietnam, an area which is underrepresented in that respect: the (?) Kačák Event, the (?)pumilioEvents, the late Middle Givetian Taghanic Event and the Frasnian/Famennian Kellwasser Event. The stratigraphic framework of the Si Phai section allows us to recognise and assess the timing of global Devonian bioevents in Vietnam even though the section is not continuous. An overview of the sedimentological development of the Si Phai section is discussed briefly where carbonates in the section are composed of argillaceous limestones suggesting relatively deep, off-shore conditions. Due to the facies setting, the macrofauna is generally rare and the conodont record is likewise limited in some parts. Nevertheless, it is possible to pinpoint some global event intervals for the first time in Vietnam.