A rapid hydroclimate change and its influence on the Songliao Basin during the Santonian-Campanian transition as recorded by compound-specific isotopes

doi:10.1016/j.palaeo.2020.109674

IEECAS OpenIR > 粉尘与环境研究室

	A rapid hydroclimate change and its influence on the Songliao Basin during the Santonian-Campanian transition as recorded by compound-specific isotopes
	Wang, Li 1; Tian, Yankuan 1; Zhao, Jiaju 2
通讯作者	Wang, Li(wangli@gig.ac.cn)
	2020-05-15
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	546 页码:12
摘要	Reconstruction of the paleoclimate and paleoenvironment of the Songliao Basin has important theoretical and practical significance to reveal the regional continental climate characteristics and continental organic matter accumulation under the Cretaceous greenhouse climate conditions. Here, we report the composition of biomarkers and the stable carbon and hydrogen isotope compositions of n-alkanes from Nenjiang Formation sediments in the Songliao Basin, which provide information on the source of organisms, paleoenvironmental conditions, and paleoclimate changes during the Late Cretaceous. Our hydrogen isotope records of n-alkanes displayed a significantly negative shift, indicating that a dramatically wet climate occurred during the Santonian-Campanian transition. A wet climate, such as that during a prolonged rainfall event, had a significant impact on the lake and resulted in the lake level increasing and the salinity decreasing in the surface water during this period. However, the freshwater input increased the salinity difference between the upper and lower water layers, which caused stable water stratification to occur in the lake. In addition, the high total organic carbon (TOC) content indicates high primary productivity because of increased precipitation carrying more terrigenous nutrients into the lake, which resulted in eutrophication during this period. Notably, the increased aryl isoprenoid ratios and the occurrence of isorenieratane indicates that photic zone euxinia (PZE) was enhanced during the Santonian-Campanian transition, which was possibly due to the dramatic change in the hydroclimate. We speculate that the large freshwater input promoted the formation of PZE in the lake. Then, PZE restricted the habitat available for aerobic organisms, which had fatal effects on the lake ecosystem.
关键词	Biomarkers Paleoenvironment Hydrogen isotopes Photic zone euxinia Water salinity change Prolonged rainfall event
DOI	10.1016/j.palaeo.2020.109674
关键词[WOS]	LACUSTRINE SOURCE ROCKS ; DELTA-D VALUES ; N-ALKANES ; CARBON-ISOTOPE ; PALEOENVIRONMENTAL RECONSTRUCTION ; PALEOCLIMATE CHANGE ; LIPID BIOMARKERS ; LAKE-SEDIMENTS ; ORGANIC-CARBON ; STABLE CARBON
收录类别	SCI ; SCI
语种	英语
资助项目	National Science Foundation of China[41502140] ; National Science Foundation of China[41502121] ; [SKLOG 2016-A06] ; [XDA14010103] ; [20172X05008-002-030]
WOS研究方向	Physical Geography ; Geology ; Paleontology
项目资助者	National Science Foundation of China
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000526826100011
出版者	ELSEVIER
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12588
专题	粉尘与环境研究室
通讯作者	Wang, Li
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Xian 710071, Peoples R China
推荐引用方式 GB/T 7714	Wang, Li,Tian, Yankuan,Zhao, Jiaju. A rapid hydroclimate change and its influence on the Songliao Basin during the Santonian-Campanian transition as recorded by compound-specific isotopes[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,546:12.
APA	Wang, Li,Tian, Yankuan,&Zhao, Jiaju.(2020).A rapid hydroclimate change and its influence on the Songliao Basin during the Santonian-Campanian transition as recorded by compound-specific isotopes.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,546,12.
MLA	Wang, Li,et al."A rapid hydroclimate change and its influence on the Songliao Basin during the Santonian-Campanian transition as recorded by compound-specific isotopes".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 546(2020):12.