Sedimentary Expressions of the Early Jurassic Jenkyns Event in an Inland Lacustrine System in the Yin'gen-Ejinaqi Basin, North China
文献类型：期刊论文
| 作者 | Yang, Bing1; Xu, Guozhen2; Hui, Guangji1; Wei, Yi3; Zhang, Xinzhi1; Yi, Jinjun1; Sun, Siyuan1; Zhang, Sujiang1 |
| 刊名 | ACTA GEOLOGICA SINICA-ENGLISH EDITION
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 98期号:5页码:1359-1375 |
| 关键词 | spore-pollen assemblages clay minerals pyrite framboids organic carbon isotope Jenkyns event |
| ISSN号 | 1000-9515 |
| DOI | 10.1111/1755-6724.15186 |
| 通讯作者 | Xu, Guozhen(gzxu@nigpas.ac.cn) |
| 英文摘要 | The Jenkyns Event, more widely known as the Toarcian Oceanic Anoxic Event (T-OAE), is marked by globally distributed negative carbon-isotope excursions, widespread oxygen depletion, and large-scale organic carbon burial, which indicate major climate/environmental perturbations in Earth's surface systems during the Early Jurassic. Although extensive research has been conducted in European continental settings, particularly in the western peri-Tethys regions, the impacts of this event beyond Europe remains largely unexplored. Here, a multiapproach study including investigations into the spore-pollen assemblages, pyrite framboids, clay minerals, total organic carbon (TOC) levels, and organic carbon isotope (delta 13Corg) levels in a lacustrine borehole section (MED1) from the Yin'gen-Ejinaqi Basin, North China, provides evidence of the occurrence of the Jenkyns Event and its extensive sedimentary responses in the eastern Tethys terrestrial systems. Two distinct spore-pollen assemblages have been identified in MED1 (drilling depth: 982.4 m to 1267.5 m), with the Cycadopites-Protopinus-Osmundacidites assemblage in the lower part (1267.5 m to 1132.9 m) indicating a middle Early Jurassic age and the Classopollis assemblage in the upper part (1132.9 m to 985.7 m) suggesting a Toarcian age. Framboidal pyrite data suggest more anoxic conditions during the deposition of black mudstone and shale intercalations in the lower part of the Classopollis assemblage (1132.9 m to 1066.9 m), which combined with organic carbon enrichment and negative delta 13Corg excursions, are considered the paleoenvironmental response to the Jenkyns Event in the study area. Furthermore, the evolution of vegetation groups changed from plant groups characterized by bisaccate and cycad pollen, as well as fern spores, to vegetation groups represented by Cheirolepidiaceae pollen across the Jenkyns Event, as evidenced by spore-pollen data, together with the clay mineral assemblage change characterized by a notable increase in illite at the expense of kaolinite, suggests that while a subtropical-temperate climate persisted, a change toward warmer and drier conditions most likely occurred in the early Toarcian in the study area. In contrast to the humidification evidenced in many coastal settings, this aridification trend in the Yin'gen-Ejinaqi Basin aligns with the conditions in many inland areas. It is hypothesized that the underlying cause of these divergent changes may be linked to certain patterns of spatially variable water availability on land, potentially driven by extremified hydrological conditions. |
| WOS关键词 | OCEANIC ANOXIC EVENT ; OSMIUM ISOTOPE EVIDENCE ; TOARCIAN BLACK SHALES ; SIZE DISTRIBUTION ; ATMOSPHERIC CO2 ; CLAY MINERALOGY ; CARBON-CYCLE ; TOYORA AREA ; 2 PULSES ; RECORD |
| 资助项目 | China Geological Survey Project[DD20230138] ; China Geological Survey Project[DD20242504] ; National Natural Science Foundation of China[41702366] ; Sinopec Project[34550000-21-FW2099-0055] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001345393600013 |
| 出版者 | WILEY |
| 资助机构 | China Geological Survey Project ; National Natural Science Foundation of China ; Sinopec Project |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/44494]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Xu, Guozhen |
| 作者单位 | 1.Cores & Samples Ctr Nat Resources, Langfang 065201, Hebei, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 3.North China Inst Sci & Technol, Langfang 065201, Hebei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Bing,Xu, Guozhen,Hui, Guangji,et al. Sedimentary Expressions of the Early Jurassic Jenkyns Event in an Inland Lacustrine System in the Yin'gen-Ejinaqi Basin, North China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2024,98(5):1359-1375. |
| APA | Yang, Bing.,Xu, Guozhen.,Hui, Guangji.,Wei, Yi.,Zhang, Xinzhi.,...&Zhang, Sujiang.(2024).Sedimentary Expressions of the Early Jurassic Jenkyns Event in an Inland Lacustrine System in the Yin'gen-Ejinaqi Basin, North China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,98(5),1359-1375. |
| MLA | Yang, Bing,et al."Sedimentary Expressions of the Early Jurassic Jenkyns Event in an Inland Lacustrine System in the Yin'gen-Ejinaqi Basin, North China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 98.5(2024):1359-1375. |
入库方式： OAI收割
来源：南京地质古生物研究所
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