干旱区生态环境知识资源中心(Arid): Early Cretaceous palynology and paleoclimate of the Hanxia-Hongliuxia Area, Jiuxi Basin, China

Arid

DOI	10.1016/j.revpalbo.2020.104259
	Early Cretaceous palynology and paleoclimate of the Hanxia-Hongliuxia Area, Jiuxi Basin, China
	Jin, Peihong; Ji, Liming; Ma, Bo; Yuan, Bochao; Long, Liwen
通讯作者	Ji, LM
来源期刊	REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN	0034-6667
EISSN	1879-0615
出版年	2020
卷号	281
英文摘要	The Jiuxi Basin is the earliest developed petroleum production area in China, and the Lower Cretaceous strata in this area are the main source rocks in this basin. Although the strata in this area are rich in fossils and have been researched for a long period, different interpretations of their geological age have been proposed. In this study, palynological samples collected from the Chijinbao Formation (Hanxia Section) and the Xiagou Formation (Hongliuxia Section) in the Jiuxi Basin were analyzed, and abundant fossil palynomorphs were identified. Based on detailed identification and statistical and comparative analyses, five palynological assemblages can be defined from the bottom to top of these strata. Among these, three assemblages are established in the Chijinbao Formation in the Hanxia Section. Their geological ages are Berriasian-Valanginian in the Early Cretaceous. Two assemblages are established in the Xiagou Formation in the Hongliuxia Section. Their geological ages are Hauterivian-Barremian in the Early Cretaceous. By analyzing the distribution characteristics and ecological environments of the different palynoflora types, we speculate that in the Berriasian-Valanginian, the vegetation of the basin mainly consisted of coniferous forests. During this time, ferns were scarce, and the climate was generally warm and humid. By the Hauterivian-Barremian, the vegetationmainly consisted of coniferous forests, ferns and cycads, and the climate was generally humid. The short-duration increase in Cheirolepidaceae reflects a short and slightly arid period in the early stage of the Hauterivian-Barremian. Furthermore, small-scale arid-humid climate fluctuations occurred during the deposition of both formations. (C) 2020 Published by Elsevier B.V.
英文关键词	Jiuxi Basin Early cretaceous Palynological assemblages Paleoclimate change
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000568892600002
WOS关键词	CICATRICOSE SPORES ; PALYNOMORPH ASSEMBLAGES ; STRATIGRAPHIC REVISION ; YIXIAN FORMATION ; SOUTHEAST ; MONGOLIA ; PROVINCE ; RECORDS ; POLLEN ; MOHRIA
WOS类目	Plant Sciences ; Paleontology
WOS研究方向	Plant Sciences ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326258
作者单位	[Jin, Peihong; Ji, Liming; Ma, Bo] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China; [Jin, Peihong; Ji, Liming; Ma, Bo] Chinese Acad Sci, Nanjing Inst Geol & Paleontol, State Key Lab Paleobiol & Stratig, Nanjing 210008, Peoples R China; [Yuan, Bochao] PetroChina Yumen Oilfield Co, Res Inst Explorat & Dev, Jiuquan 735019, Gansu, Peoples R China; [Long, Liwen] PetroChina Res Inst Petr Explorat & Dev Northwest, Lanzhou 730020, Peoples R China
推荐引用方式 GB/T 7714	Jin, Peihong,Ji, Liming,Ma, Bo,et al. Early Cretaceous palynology and paleoclimate of the Hanxia-Hongliuxia Area, Jiuxi Basin, China[J],2020,281.
APA	Jin, Peihong,Ji, Liming,Ma, Bo,Yuan, Bochao,&Long, Liwen.(2020).Early Cretaceous palynology and paleoclimate of the Hanxia-Hongliuxia Area, Jiuxi Basin, China.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,281.
MLA	Jin, Peihong,et al."Early Cretaceous palynology and paleoclimate of the Hanxia-Hongliuxia Area, Jiuxi Basin, China".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 281(2020).