Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules

doi:10.1016/j.precamres.2023.107045

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	Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules
	Long, Haijun 1,2,3; Yang, Hao 4; Qu, Yuangao 2
	2023-06-15
发表期刊	PRECAMBRIAN RESEARCH
ISSN	0301-9268
卷号	390 页码:15
通讯作者	Qu, Yuangao()
摘要	The Doushantuo Formation (DST) in South China preserved significant bio-and chemostratigraphic records that are critical to the study of Ediacaran life and environment. Abundant microfossils and organic matter (Corg) were preserved in the DST nodules. We investigated the mineralogy, petrography and the structural characteristics of Corg in three different types (Type I: silica-rich; Type II: pyrite-rich; Type III: barite-rich) of DST nodules, in order to better understand the geobiological processes during the formation of nodules and the taphonomic details of Corg preserved therein. According to Raman spectral parameters, the Corg experienced low-grade metamorphism, and represents obvious heterogeneities of structural order and H:C in the center, rim and the host rock, respectively. Furthermore, the structural characteristics of Corg show distinct bias to various mineral matrices (silica, pyrite, goethite and barite) where they were preserved, probably due to differential mineral-organic interactions during the formation of different nodules. These mm-and mu m-scale structural heterogeneities of Corg reflect the nature of precursor organism, which were subsequently affected by various post-depositional processes. Our study proposes the possible formation processes of three types of DST nodule, suggests the geo-biological influences on the Corg preserved therein, and sheds light on the geobiological signatures from the DST using Raman-based approaches.
关键词	Biosignature Organic matter Chert nodule Doushantuo Formation Raman spectroscopy
DOI	10.1016/j.precamres.2023.107045
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41972204] ; Hundred Talents Program of China[2020000053]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000984244300001
出版者	ELSEVIER
WOS关键词	CARBONACEOUS-MATERIAL GEOTHERMOMETER ; YANGTZE GORGES AREA ; DOUSHANTUO FORMATION ; SOUTH CHINA ; STRUCTURAL-CHARACTERIZATION ; ACANTHOMORPHIC ACRITARCHS ; SEQUENCE STRATIGRAPHY ; GRAPHITE FORMATION ; ZAONEGA FORMATION ; BARITE FORMATION
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/182949
专题	中国科学院海洋研究所
通讯作者	Qu, Yuangao
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.China Univ Geosci Wuhan, State Key Lab Biogeol & Environm Geol, Wuhan, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Long, Haijun,Yang, Hao,Qu, Yuangao. Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules[J]. PRECAMBRIAN RESEARCH,2023,390:15.
APA	Long, Haijun,Yang, Hao,&Qu, Yuangao.(2023).Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules.PRECAMBRIAN RESEARCH,390,15.
MLA	Long, Haijun,et al."Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules".PRECAMBRIAN RESEARCH 390(2023):15.