气候变化领域集成服务门户(CCPortal): Sedimentary environment and organic matter accumulation of Neoproterozoic black shale in the North China Craton: A case study of the Tonian Baishugou Formation in the Luonan area

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DOI	10.1016/j.palaeo.2020.109694
	Sedimentary environment and organic matter accumulation of Neoproterozoic black shale in the North China Craton: A case study of the Tonian Baishugou Formation in the Luonan area
	Hu S.; Wang K.; Wang T.; Yang T.; Luo P.; Shi S.; Wang S.; Su J.
发表日期	2020
ISSN	0031-0182
卷号	547
英文摘要	With acceleration of “oil exploration near the source” in the petroleum industry, black shales (BS) play an increasingly important role in oil and gas exploration. Meso-Neoproterozoic BS are well developed in the North China Craton (NCC), China, many of which are identified as potential hydrocarbon source rocks. Although BS from the Mesoproterozoic Era has been widely investigated, few studies were focused on the Neoproterozoic BS so far. Based on petrology and geochemistry analysis, the sedimentary environment, provenance and organic matter accumulation of two BS layers in the Tonian Baishugou Formation from Sujiacun section, Luonan Area, southern NCC were investigated. It suggests that the lower BS (LB) was deposited in a shallow and non-stratified cratonic-interior sea environment with unstable dysoxic or suboxic conditions. The seawater salinity increased from brackish to marine facies conditions due to the decrease of runoff caused by climate cooling. The Upper BS (UB) was deposited in an open paleomarine environment with stable suboxic conditions and brackish salinity in continuously humid and hot paleoclimate. Both BS were derived from granitoids formed by the ca.2.5 Ga collisional-thermal events in the NCC. The OM accumulation rate of UB is higher than that of UB while LB records lower OM loss rate. On these bases, two developmental modes for the BS from the Baishugou Formation were established. © 2020 Elsevier B.V.
英文关键词	Paleoclimate; Petrology; Provenance; Redox conditions; Source rock; Water salinity
语种	英语
scopus关键词	black shale; geoaccumulation; organic matter; paleoclimate; petrology; Proterozoic; provenance; redox conditions; runoff; salinity; seawater; source rock; suboxic conditions; North China Block
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/150532
作者单位	PetroChina Research Institute of Petroleum Exploration & Development, Xueyuan Str. 20, Beijing, 100083, China
推荐引用方式 GB/T 7714	Hu S.,Wang K.,Wang T.,et al. Sedimentary environment and organic matter accumulation of Neoproterozoic black shale in the North China Craton: A case study of the Tonian Baishugou Formation in the Luonan area[J],2020,547.
APA	Hu S..,Wang K..,Wang T..,Yang T..,Luo P..,...&Su J..(2020).Sedimentary environment and organic matter accumulation of Neoproterozoic black shale in the North China Craton: A case study of the Tonian Baishugou Formation in the Luonan area.Palaeogeography, Palaeoclimatology, Palaeoecology,547.
MLA	Hu S.,et al."Sedimentary environment and organic matter accumulation of Neoproterozoic black shale in the North China Craton: A case study of the Tonian Baishugou Formation in the Luonan area".Palaeogeography, Palaeoclimatology, Palaeoecology 547(2020).