中国科学院南京地质古生物研究所机构知识库

QQ客服 官方微博 反馈留言

	Sedimentary Expressions of the Early Jurassic Jenkyns Event in an Inland Lacustrine System in the Yin'gen-Ejinaqi Basin, North China
通讯作者	Xu, Guozhen([email protected])
	Yang, Bing1; Xu, Guozhen2; Hui, Guangji1; Wei, Yi3; Zhang, Xinzhi1; Yi, Jinjun1; Sun, Siyuan1; Zhang, Sujiang1
	2024-10-01
发表期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN	1000-9515
卷号	98期号:5页码:1359-1375
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.
关键词	spore-pollen assemblages clay minerals pyrite framboids organic carbon isotope Jenkyns event
DOI	10.1111/1755-6724.15186
收录类别	SCI
语种	英语
关键词[WOS]	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
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001345393600013
项目资助者	China Geological Survey Project ; National Natural Science Foundation of China ; Sinopec Project
出版者	WILEY
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44495
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
通讯作者单位	中国科学院南京地质古生物研究所
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.

条目包含的文件
条目无相关文件。

内 容：

标 题：

内 容：