Pyritized preservation of chancelloriids from the Cambrian Stage 3 of South China and implications for biomineralization
Yun, Hao1,2; Cui, Linhao1,2; Li, Luoyang3; Liu, Wei1,2; Zhang, Xingliang(张兴亮)1,2,4
刊名GEOBIOS
2021-12-01
卷号69页码:77-86
关键词Chancelloriida Scleritome Fossilization Fibrous aragonite Guojiaba Formation
ISSN号0016-6995
DOI10.1016/j.geobios.2021.06.001
英文摘要

The enigmatic Cambrian animal chancelloriids were discovered in a wide range of taphonomic settings; however, preservation of biomineralized sclerite microstructure was solely known from secondarily phosphatized skeletal remains. Here, we investigate a uniquely pyritized chancelloriid from the lower Cambrian Guojiaba Formation in southern Shaanxi Province, China, using a combination of advanced analytic techniques. Results of the energy dispersive spectroscopy (EDS), X-Ray Fluorescence (XRF), and Raman spectrum show that the sclerites and scleritomes are preserved as pyritized internal moulds with a calcitic outer layer. The outer layer enveloping the internal moulds likely represents the recrystallized counterpart of the original biomineralized sclerite wall. Distinctive fibrous microstructures are discovered in the sclerites, which echo the features seen in the phosphatized fossils of chancelloriids. The typical microstructure, along with the recrystallized calcite, corroborate the interpretation that chancelloriid sclerites were originally constructed by fibrous aragonite. The stability of the microstructure and mineral composition in both carbonate and siliciclastic backgrounds indicate that chancelloriids were adapted to exploit aragonitic fibres to build their skeletons regardless of the change of their living environments. (c) 2021 Elsevier Masson SAS. All rights reserved.

资助项目National Key Research and Development Program[2017YFC0603101] ; National Natural Science Foundation of China[41621003] ; National Natural Science Foundation of China[41890840] ; National Natural Science Foundation of China[41930319] ; National Natural Science Foundation of China[42002011] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; 111 Project[D17013] ; China Postdoctoral Science Foundation[2019M663793]
WOS关键词SMALL SHELLY FOSSILS ; SKELETAL FOSSILS ; EASTERN YUNNAN ; NORTH CHINA ; SCLERITOMES ; CHENGJIANG ; LIMESTONES ; MINERALOGY ; ISLAND ; FAUNA
WOS研究方向Paleontology
语种英语
出版者ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
WOS记录号WOS:000729208000001
资助机构National Key Research and Development Program ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; 111 Project ; China Postdoctoral Science Foundation
内容类型期刊论文
源URL[http://ir.nigpas.ac.cn/handle/332004/40225]  
专题中国科学院南京地质古生物研究所
通讯作者Yun, Hao; Zhang, Xingliang(张兴亮)
作者单位1.Northwest Univ, State Key Lab Continental Dynam, Xian 710069, Peoples R China
2.Northwest Univ, Shaanxi Key Lab Early Life & Environm, Dept Geol, Xian 710069, Peoples R China
3.Swedish Museum Nat Hist, Dept Palaeobiol, Box 50007, SE-10405 Stockholm, Sweden
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
推荐引用方式
GB/T 7714
Yun, Hao,Cui, Linhao,Li, Luoyang,et al. Pyritized preservation of chancelloriids from the Cambrian Stage 3 of South China and implications for biomineralization[J]. GEOBIOS,2021,69:77-86.
APA Yun, Hao,Cui, Linhao,Li, Luoyang,Liu, Wei,&Zhang, Xingliang.(2021).Pyritized preservation of chancelloriids from the Cambrian Stage 3 of South China and implications for biomineralization.GEOBIOS,69,77-86.
MLA Yun, Hao,et al."Pyritized preservation of chancelloriids from the Cambrian Stage 3 of South China and implications for biomineralization".GEOBIOS 69(2021):77-86.
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