Authigenic clay mineral constraints on spatiotemporal evolution of restricted, evaporitic conditions during deposition of the Ediacaran Doushantuo Formation
文献类型:期刊论文
作者 | Han, Shujun10,11,12; Lohr, Stefan9,12; Abbott, April N.8; Baldermann, Andre7; Shields, Graham A.6; Cui, Huan5; Kaufman, Alan J.3,4; Chen, Bo1,2; Yu, Bingsong10 |
刊名 | EARTH AND PLANETARY SCIENCE LETTERS |
出版日期 | 2024-01-15 |
卷号 | 626页码:14 |
ISSN号 | 0012-821X |
关键词 | authigenic clay Ediacaran Doushantuo Formation restricted lagoon evaporitic condition |
DOI | 10.1016/j.epsl.2023.118524 |
英文摘要 | The carbonate-rich shelf facies of the Ediacaran Doushantuo Formation (South China) have produced a broad array of microfossil and isotope proxy records which underpin much of our understanding of environmental change and biospheric evolution during this key time period. Recent reports of locally abundant authigenic, Mgrich saponite clay in the Yangtze Gorges Area hint at potentially widespread evaporitic conditions in a lagoonal setting. Despite the implications for interpretation of proxy records and the environmental setting of early metazoans, the spatiotemporal extent of restricted, evaporitic conditions across the Yangtze Block remains largely unexplored. Here we use mineralogical and petrographic techniques to document the spatial and stratigraphic distribution of authigenic clay minerals across seven sites, representing a transect from shallow proximal shelf to deep basinal settings. Our results demonstrate the widespread and persistent occurrence of authigenic saponite in proximal shelf settings, whereas talc is identified at more distal shelf sites, consistent with Mg-clay authigenesis in an evaporitic lagoon with spatially variable detrital aluminosilicate input. Slope and basinal sites contain no Mg-clays and are instead characterized by abundant authigenic illite, consistent with an open marine setting. Stratigraphically, illite was found in the basal cap carbonate and uppermost Doushantuo Formation, with Mg-clays only present in the interval in-between, suggesting gradual development of an extensive carbonate rimmed lagoon over the Yangtze shelf that restricted seawater exchange, followed by stronger marine influence due to erosion of the carbonate rim and subsequent marine transgression. We conclude that restricted, evaporitic conditions were much more expansive than previously assumed, potentially providing favorable conditions for the Doushantuo Biota. Further, the widespread presence of authigenic clays across the shelf supports the case for enhanced reverse weathering before the advent of biosilicification. |
WOS关键词 | SOUTH CHINA ; GORGES AREA ; OCEAN ; PRESERVATION ; TEMPERATURE ; ENVIRONMENT ; CARBONATES ; INSIGHTS ; ROCKS ; BIOTA |
资助项目 | China Scholarship Council[201906400045] |
WOS研究方向 | Geochemistry & Geophysics |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:001141353000001 |
资助机构 | China Scholarship Council |
源URL | [http://ir.nigpas.ac.cn/handle/332004/42902] |
专题 | 中国科学院南京地质古生物研究所 |
通讯作者 | Han, Shujun |
作者单位 | 1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China 3.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA 4.Univ Maryland, Dept Geol, College Pk, MD 20742 USA 5.Mississippi State Univ, Dept Geosci, Mississippi State, MS 39762 USA 6.UCL, Dept Earth Sci, Gower St, London WC1E 6BT, England 7.Graz Univ Technol, Inst Appl Geosci, NAWI Graz Geoctr, Rechbauerstr 12, A-8010 Graz, Austria 8.Coastal Carolina Univ, Dept Marine Sci, Conway, SC 29526 USA 9.Univ Adelaide, Dept Earth Sci, Adelaide, SA 5005, Australia 10.China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China |
推荐引用方式 GB/T 7714 | Han, Shujun,Lohr, Stefan,Abbott, April N.,et al. Authigenic clay mineral constraints on spatiotemporal evolution of restricted, evaporitic conditions during deposition of the Ediacaran Doushantuo Formation[J]. EARTH AND PLANETARY SCIENCE LETTERS,2024,626:14. |
APA | Han, Shujun.,Lohr, Stefan.,Abbott, April N..,Baldermann, Andre.,Shields, Graham A..,...&Yu, Bingsong.(2024).Authigenic clay mineral constraints on spatiotemporal evolution of restricted, evaporitic conditions during deposition of the Ediacaran Doushantuo Formation.EARTH AND PLANETARY SCIENCE LETTERS,626,14. |
MLA | Han, Shujun,et al."Authigenic clay mineral constraints on spatiotemporal evolution of restricted, evaporitic conditions during deposition of the Ediacaran Doushantuo Formation".EARTH AND PLANETARY SCIENCE LETTERS 626(2024):14. |
入库方式: OAI收割
来源:南京地质古生物研究所
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