气候变化领域集成服务门户(CCPortal): Organic matter variations and links to climate across the early Toarcian oceanic anoxic event (T-OAE) in Toyora area; southwest Japan

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DOI	10.1016/j.palaeo.2019.05.040
	Organic matter variations and links to climate across the early Toarcian oceanic anoxic event (T-OAE) in Toyora area; southwest Japan
	Kemp D.B.; Baranyi V.; Izumi K.; Burgess R.D.
发表日期	2019
ISSN	0031-0182
起始页码	90
结束页码	102
卷号	530
英文摘要	Marked climate warming during the early Toarcian oceanic anoxic event (T-OAE, ~182 Ma) has been shown to have had a significant effect on the global carbon cycle and biosphere. There is also emerging evidence that a primary short-term consequence of this warming was a marked increase in hydrological cycling. In this study, we have investigated local environmental responses to T-OAE climate change by conducting a palynofacies analysis through an expanded Panthalassic margin record of the event exposed in southwestern Japan (Nishinakayama Formation, Toyora area). Palynomorphs are poorly preserved and rare in the studied interval. A pronounced increase in terrestrial phytoclast abundance coeval with the peak of the T-OAE can be linked to increased fluvial supply driven by enhanced hydrological cycling that occurred in response to early Toarcian warming. Broader scale trends in phytoclast abundance through the studied interval may be linked to longer-term sea-level changes. Nitrogen-isotopes, commonly used to elucidate basin redox changes, are found to correlate with changes in the relative abundance of phytoclasts. In contrast, carbon-isotope data are probably not significantly influenced by changes in organic matter type through the succession. However, thermal maturity indicators demonstrate that the succession is overmature, and this likely suppresses the magnitude of the well-known T-OAE carbon-isotope excursion in this succession. © 2019
英文关键词	Hydrology; Nitrogen-isotopes; Organic matter; Palynofacies; Phytoclasts; Toarcian
语种	英语
scopus关键词	anoxic conditions; biosphere; carbon cycle; climate change; hydrological cycle; hydrology; nitrogen isotope; organic matter; palynomorph; sea level change; thermal maturity; Toarcian; Japan
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150905
作者单位	State Key Laboratory of Biogeology and Environmental Geology and School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; Hrvatski geološki institut, Sachsova 2, P.O. Box 268, Zagreb, HR-10000, Croatia; Faculty & Graduate School of Education, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba, 263-8522, Japan; School of Geosciences, University of Aberdeen, Old Aberdeen, Aberdeen, AB24 3UE, United Kingdom
推荐引用方式 GB/T 7714	Kemp D.B.,Baranyi V.,Izumi K.,et al. Organic matter variations and links to climate across the early Toarcian oceanic anoxic event (T-OAE) in Toyora area; southwest Japan[J],2019,530.
APA	Kemp D.B.,Baranyi V.,Izumi K.,&Burgess R.D..(2019).Organic matter variations and links to climate across the early Toarcian oceanic anoxic event (T-OAE) in Toyora area; southwest Japan.Palaeogeography, Palaeoclimatology, Palaeoecology,530.
MLA	Kemp D.B.,et al."Organic matter variations and links to climate across the early Toarcian oceanic anoxic event (T-OAE) in Toyora area; southwest Japan".Palaeogeography, Palaeoclimatology, Palaeoecology 530(2019).