干旱区生态环境知识资源中心(Arid): Palaeoenvironmental periodisms of middle Eocene terrestrial sediments in Bohai Bay Basin, eastern China, and their implications for organic matter accumulation

Arid

DOI	10.1016/j.marpetgeo.2019.104060
	Palaeoenvironmental periodisms of middle Eocene terrestrial sediments in Bohai Bay Basin, eastern China, and their implications for organic matter accumulation
	Di, Chen 1,2; Pang, Xiongqi 1,2; Wang, Youwei 3; Dong, Yuexia 4; Jiang, Fujie 1,2; Li, Liang 4; Pang, Hong 1,2; Bai, Hua 5; Pang, Bo 1,2; Qin, Ru 1,2; Jiang, Hang 6
通讯作者	Pang, Xiongqi
来源期刊	MARINE AND PETROLEUM GEOLOGY
ISSN	0264-8172
EISSN	1873-4073
出版年	2020
卷号	112
英文摘要	The middle Eocene was a key period of global climate change from a warm greenhouse to a cooling doubthouse. At the middle Eocene, an extensive arid climate in China was recorded in the mudstones and shales interbedded with salinastone which formed good hydrocarbon source rocks, especially in the Bohai Bay Basin. The sedimentary paleoenvironment and its variations affected the source rock quality and distribution. Based on successive and dense sampling of the middle Eocene Shahejie Formation shale (MES shale) in Nanpu Sag of Bohai Bay Basin, petro-mineralogical tests, geochemical methods and spectrum analysis were performed to analyse the palaeoenvironmental fluctuations and the responses to Milankovitch cycles. Element analysis on MES shale shows that the middle Eocene climate was arid and the sediments were deposited under dysmdc/suboxic conditions with relatively high salinity. Based on the Delta log R method, the organic matter (OM) abundance was evaluated and ranged from 0.18 to 3.55 wt % for MES shale. The mean primary productivity of 545 g C m(-2) yr(-1) shows a eutrophic environment in middle Eocene Nanpu paleolake. Wavelet analysis performed on gamma logging and palaeoenvironmental proxies revealed clear Milankovitch cycles for MES shale, and the cyclostratigraphic and palaeoenvironmental fluctuations were effected by astronomical oscillation periods of the short eccentricity cycle (100 k.y.), obliquity cycle (39 k.y.) and precession cycle (19 k.y.). The depositional rate of MES shale was corrected to 0.43 m/k.y. The sedimental process of MES shale was associated with palaeoenvironmental variation, which have been divided into four stages affecting OM accumulation. A hypothesis that the vast carbon of greenhouse gases in the Palaeocene and early Eocene was fixed in organic matters during middle Eocene and enriched in the hydrocarbon source rocks of the sedimentary basins formed at early Eocene was proposed to explain the doubthouse world in the Eocene.
英文关键词	Middle Eocene Palaeoenvironmental evolution Terrestrial shale Mid-latitude region Milankovitch cycles
类型	Article
语种	英语
国家	Peoples R China ; Netherlands
收录类别	SCI-E
WOS记录号	WOS:000509622600064
WOS关键词	SHALE ; PRESERVATION ; PALEOCENE ; MODELS ; ANOXIA ; RECORD ; EARTH
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
EI主题词	2020-02-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312683
作者单位	1.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China; 2.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China; 3.Delft Univ Technol, Dept Geosci & Engn, Stevinweg 1, NL-2628 CN Delft, Netherlands; 4.PetroChina Jidong Oilfield Co, Tangshan 063004, Peoples R China; 5.China ZhenHuaOil Co Ltd, Beijing 100031, Peoples R China; 6.MNR, Strateg Res Ctr Oil & Gas Resources, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Di, Chen,Pang, Xiongqi,Wang, Youwei,et al. Palaeoenvironmental periodisms of middle Eocene terrestrial sediments in Bohai Bay Basin, eastern China, and their implications for organic matter accumulation[J],2020,112.
APA	Di, Chen.,Pang, Xiongqi.,Wang, Youwei.,Dong, Yuexia.,Jiang, Fujie.,...&Jiang, Hang.(2020).Palaeoenvironmental periodisms of middle Eocene terrestrial sediments in Bohai Bay Basin, eastern China, and their implications for organic matter accumulation.MARINE AND PETROLEUM GEOLOGY,112.
MLA	Di, Chen,et al."Palaeoenvironmental periodisms of middle Eocene terrestrial sediments in Bohai Bay Basin, eastern China, and their implications for organic matter accumulation".MARINE AND PETROLEUM GEOLOGY 112(2020).