Trace fossils in Silurian Yimugantaw Formation in Kalpin area, Tarim Basin

BAI Zhongkai; YANG Youxing; HAN Miao; SUN Zhichao; JIAO Yang

2017 Vol. 36, No. 2-3

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BAI Zhongkai, YANG Youxing, HAN Miao, SUN Zhichao, JIAO Yang. Trace fossils in Silurian Yimugantaw Formation in Kalpin area, Tarim Basin[J]. Geological Bulletin of China, 2017, 36(2-3): 285-292.

Citation:

BAI Zhongkai, YANG Youxing, HAN Miao, SUN Zhichao, JIAO Yang. Trace fossils in Silurian Yimugantaw Formation in Kalpin area, Tarim Basin[J]. Geological Bulletin of China, 2017, 36(2-3): 285-292.

Trace fossils in Silurian Yimugantaw Formation in Kalpin area, Tarim Basin

Oil & Gas Survey, CGS, Beijing 100029, China

Received Date: 03 March 2016

Revised Date: 15 December 2016

Publish Date: 25 March 2017

Abstract

Abstract

Based on the analysis of trace fossils collected from the typical outcrop of the Silurian Yimugantaw Formation in the Kalpin area, the authors identified seven ichnospecies of six ichnogenus in Yimugantawu Formation. The ichnospecies mainly consist of such common trace fossils, i.e., Chondrites isp., Gordia.isp., Helminthopsis aff. abeli, Ophiomorpha nodosa, Planolites beverleyensis, Planolites montanus and Thalassinoides isp.. The trace fossils are of high diversity and low abundance. According to their palaeoecological, behavioral and ethological features, these trace fossils belong to three ethological categories: ①Domichnia:Ophiomorpha nodosa, Thalassinoides isp.;②Fodinichnia:Planolites beverleyensis, Planolites montanus, Chondrites isp.;③Repichnia:Gordia isp., Helminthopsis aff. abeli. These trace fossils can be assigned to Planolites-Chondrites ichnoassemblags and can be diagnosed as the Cruziana ichnofacies. According to the composition and distribution characteristics of these fossils in the sedimentary sequences and the characteristics of country rocks, these trace fossils might have formed in a mudflat sedimentary environment.
- trace fossils /
- Yimugantaw Formation /
- Silurian /
- Kalpin area /
- Tarim Basin

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References

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