Depositional environments, hematite-chamosite differentiation and origins of Middle Ordovician iron ooids in the Upper Yangtze region, South China
文献类型：期刊论文
| 作者 | Luan, Xiaocong3,4,5 ; Sproat, Colin D.3; Jin, Jisuo2; Zhan, Renbin1,4,5
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| 刊名 | SEDIMENTOLOGY
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| 出版日期 | 2024-06-14 |
| 页码 | 38 |
| 关键词 | Chamosite ferruginous ooids hematite microfacies shallow-water mosaic transgression |
| ISSN号 | 0037-0746 |
| DOI | 10.1111/sed.13213 |
| 通讯作者 | Luan, Xiaocong(xcluan@nigpas.ac.cn) |
| 英文摘要 | Middle Ordovician iron ooids in the Upper Yangtze region of South China are composed mainly of hematite and/or chamosite, found in mixed siliciclastic and carbonate successions, with hematitic ooids occurring in the west, and predominantly chamositic ooids in the east of the study area. In the three iron ooid-bearing Middle-Upper Ordovician successions, 19 microfacies are recognized and grouped into eight facies associations, representing a shallow-water mosaic comprising restricted and semi-restricted lagoons, and open marine subtidal deposits interfingering with tidal flat and shoal facies. Hematitic ooids with well-sorted and well-rounded quartz grains formed in the transgressive shoal setting when the depositional environments changed from restricted lagoon to bioclast-quartz shoal and open marine subtidal. Episodic stasis and erosional intervals during transgression controlled the formation of hematite-rich and mixed hematite-chamosite laminae within the cortices of hematitic ooids. In contrast, chamositic ooids formed in a semi-restricted lagoonal environment, under long-term transgressive condensation. Alternating episodes of relatively oxic conditions with thriving organisms and eutrophication-driven anoxia resulted in the alternation of porous and dense laminae consisting mainly of chamosite in chamositic ooids. The stromatolite-like cauliflower structures associated with chamositic ooids suggest microbial activity that promoted iron concentration, similar to the origin of approximately coeval iron-rich oncoids in South China. Various iron ooid types demonstrate that these coated grains could form in a range of depositional setting and palaeooceanographic conditions on a generally shallow-marine platform during the Ordovician. |
| WOS关键词 | PAGODA FORMATION ; IRONSTONES ; BASIN ; PLATFORM ; BIODIVERSIFICATION ; CHEMOSTRATIGRAPHY ; STRATIGRAPHY ; HARDGROUNDS ; BAJOCIAN ; EXAMPLES |
| 资助项目 | National Natural Science Foundation of China[42102130] ; National Natural Science Foundation of China[41972011] ; Chinese Academy of Sciences[XDB26000000] ; China Scholarship Council[202004910207] ; State Key Laboratory of Palaeobiology and Stratigraphy ; Natural Sciences and Engineering Research Council of Canada |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001247854300001 |
| 出版者 | WILEY |
| 资助机构 | National Natural Science Foundation of China ; Chinese Academy of Sciences ; China Scholarship Council ; State Key Laboratory of Palaeobiology and Stratigraphy ; Natural Sciences and Engineering Research Council of Canada |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/43871]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Luan, Xiaocong |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Western Univ, Dept Earth Sci, London, ON N6A 5B7, Canada 3.Univ Saskatchewan, Dept Geol Sci, Saskatoon, SK S7N 5A5, Canada 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China 5.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luan, Xiaocong,Sproat, Colin D.,Jin, Jisuo,et al. Depositional environments, hematite-chamosite differentiation and origins of Middle Ordovician iron ooids in the Upper Yangtze region, South China[J]. SEDIMENTOLOGY,2024:38. |
| APA | Luan, Xiaocong,Sproat, Colin D.,Jin, Jisuo,&Zhan, Renbin.(2024).Depositional environments, hematite-chamosite differentiation and origins of Middle Ordovician iron ooids in the Upper Yangtze region, South China.SEDIMENTOLOGY,38. |
| MLA | Luan, Xiaocong,et al."Depositional environments, hematite-chamosite differentiation and origins of Middle Ordovician iron ooids in the Upper Yangtze region, South China".SEDIMENTOLOGY (2024):38. |
入库方式： OAI收割
来源：南京地质古生物研究所
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