| 摘要: |
| 西藏定结县、定日县一带的三叠系产大量遗迹化石,可划分为4个遗迹化石组合,对应于Skolithos遗迹相,Cruziana遗迹相和Zoophycos遗迹相。根据遗迹相及其它相标志判别,该区早中三叠世主要为陆棚环境,晚三叠世主要为滨岸环境。对遗迹化石的分析结果表明该区早三叠世存在短暂的缺氧事件。 |
| 关键词: 西藏 定结 三叠系 遗迹化石 |
| DOI： |
| 附件 |
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| 基金项目: |
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| Triassic trace fossils from Dinggye and Tingri,Xizang and their geological significance |
| ZHANG Xiao-bao, ZHANG Xiong-hua, QIE Wen-kun, ZHANG Yang |
(1. Northeast Hubei Geological Party, Xiaogan 432000, Hubei, China;
2. China University of Geosciences, Wuhan 430074, Hubei, China) |
| Abstract: |
| The trace fossils occur in significant quantities in the Triassic strata in Dinggye and Tingri,Xizang,and may be arranged into four trace fossil assemblages roughly corresponding to the Skolithos,Cruziana and Zoophycos ichnofacies.The examination of the above-mentioned trace fossil assemblages mainly from the Qulonggongba Formation in the study areas shows that these regions were once in the continental shelf environment during the Early and Middle Triassic and in the littoral environment during the Late Triassic.In addition,there existed a temporary anoxic event during the Early Triassic, |
| Key words: Xizang Dinggye Triassic trace fossil |
