Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules | |
Haijun Long1,2,4; Hao Yang3; Yuangao Qu4 | |
刊名 | Precambrian Research |
2023-04-18 | |
卷号 | 390页码:107045 |
关键词 | Biosignature Organic matter Chert nodule Doushantuo Formation Raman spectroscopy |
DOI | 10.1016/j.precamres.2023.107045 |
通讯作者 | Yuangao Qu |
文献子类 | Research Article |
英文摘要 | 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 μm-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 geobiological influences on the Corg preserved therein, and sheds light on the geobiological signatures from the DST using Raman-based approaches. |
学科主题 | 前寒武纪地质学 |
URL标识 | 查看原文 |
语种 | 英语 |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.idsse.ac.cn/handle/183446/10250] |
专题 | 深海科学研究部_地外海洋系统研究室 |
通讯作者 | Yuangao Qu |
作者单位 | 1.Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China 2.University of Chinese Academy of Sciences, Beijing, China 3.tate Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Wuhan), Wuhan, China 4.Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China |
推荐引用方式 GB/T 7714 | Haijun Long,Hao Yang,Yuangao Qu. Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules[J]. Precambrian Research,2023,390:107045. |
APA | Haijun Long,Hao Yang,&Yuangao Qu.(2023).Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules.Precambrian Research,390,107045. |
MLA | Haijun Long,et al."Distinguishing geobiological signatures from organic matter in the Ediacaran chert nodules".Precambrian Research 390(2023):107045. |
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