The discovery of Paleodictyon in Upper Triassic Bagong Formation in Dongqu area of Qiangtang basin and its palaeoenvironment significance
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摘要:
在羌塘盆地东部冬曲地区上三叠统巴贡组地层中发现有Paleodictyon古网迹遗迹化石，通过观测研究确认属于巢网迹遗迹亚属P.(Glenodictyon) Vander Mark，与国内外相关资料对比后认为，羌塘盆地东部冬曲地区在晚三叠世属于深海、贫氧、高盐度的复理石沉积环境，对羌塘盆地古环境分析及岩相古地理格局具有重要的指导意义。
Abstract:Paleodictyon trace fossils were found in Upper Triassic Bagong Formation in Dongqu area of Qiangtang basin. The authors confirmed that they belong to P.(Glenodictyon) Vander Mark. A comparison with relevant information available shows that the palaeoenvironment of Dongqu area in east Qiangtang basin belonged to deep-sea, low oxygen and high salinity flysch sedimentary environment in Late Triassic. The results obtained by the authors are of significance for environmental analysis and lithofacies paleogeographic pattern study.
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Key words:
- Qiangtang basin /
- Upper Triassic /
- paleodictyon /
- palaeoenvironment
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