globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2017.03.028
论文题名:
Euendoliths versus ambient inclusion trails from Early Cambrian Kuanchuanpu Formation, South China
作者: Yang X.-G.; Han J.; Wang X.; Schiffbauer J.D.; Uesugi K.; Sasaki O.; Komiya T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 476
起始页码: 147
结束页码: 157
语种: 英语
英文关键词: Cyanobacteria ; Endoconchia lata ; Microborings ; Phosphatized fossils ; Small skeletal fossils
英文摘要: Abundant microstructures have been discovered in small skeletal fossils (SSFs) and embryo-like fossils collected from the Lower Cambrian Kuanchuanpu Formation (ca. 535 Ma) in Xixiang County, Shaanxi Province, China. These involve two co-occurring structures: (1) long, unbranched cylindrical filaments, which are comparable to phosphatic casts of microborings constructed by euendolithic cyanobacteria (Endoconchia lata) in morphology and preservation pathway; and (2) meandering micro-tubes or grooves on fossil moulds (and steinkerns) of a wide range of sizes and morphological diversities, perceived as ambient inclusion trails (AITs). Herein, we also report a new occurrence of organic carbon spherules as AIT-propelled material, which is rare in comparable fossils. From direct comparison of endolith fossils and AITs, we propose a mechanism to account for their notably different preservation, and further attempt to offer an explanation for their co-occurrence. Their differential preservation suggests a chronological, taphonomic sequence of their formation. We interpret that E. lata microborings formed prior to phosphate sedimentation, whereas AITs are likely generated in a later phase of (or after) phosphorite precipitation but before calcareous re-cementation. Dissecting the sequence of formation of these structures, in conjunction with detailed morphological observations, assists in distinguishing true biologically produced endoliths from otherwise abiogenically produced microstructures. © 2017
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67843
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作者单位: State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, 229 Taibai Road, Xi'an, China; Department of Geological Sciences, University of Missouri, 101 Geology Building, Columbia, MO, United States; Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, Japan; Tohoku University Museum, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Japan; Department of Earth Science and Astronomy, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan

Recommended Citation:
Yang X.-G.,Han J.,Wang X.,et al. Euendoliths versus ambient inclusion trails from Early Cambrian Kuanchuanpu Formation, South China[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,476
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