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Early Cretaceous palynology and paleoclimate of the Hanxia-Hongliuxia Area, Jiuxi Basin, China
Jin, Peihong1,2; Ji, Liming1,2; Ma, Bo1,2; Yuan, Bochao3; Long, Liwen4
2020-10-01
Source PublicationREVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
Volume281Pages:14
Abstract

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.

KeywordJiuxi Basin Early cretaceous Palynological assemblages Paleoclimate change
DOI10.1016/j.revpalbo.2020.104259
Indexed BySCI
Language英语
WOS KeywordCICATRICOSE SPORES ; PALYNOMORPH ASSEMBLAGES ; STRATIGRAPHIC REVISION ; YIXIAN FORMATION ; SOUTHEAST ; MONGOLIA ; PROVINCE ; RECORDS ; POLLEN ; MOHRIA
Funding ProjectNational Natural Science Foundation of China[41672137] ; National Natural Science Foundation of China[41902017] ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing Institute of Geology and Paleontology, CAS)[183111] ; Key Laboratory Project of Gansu Province[1309RTSA041]
WOS Research AreaPlant Sciences ; Paleontology
WOS SubjectPlant Sciences ; Paleontology
WOS IDWOS:000568892600002
Funding OrganizationNational Natural Science Foundation of China ; State Key Laboratory of Paleobiology and Stratigraphy (Nanjing Institute of Geology and Paleontology, CAS) ; Key Laboratory Project of Gansu Province
PublisherELSEVIER
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/32556
Collection中国科学院南京地质古生物研究所
Corresponding AuthorJi, Liming
Affiliation1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, State Key Lab Paleobiol & Stratig, Nanjing 210008, Peoples R China
3.PetroChina Yumen Oilfield Co, Res Inst Explorat & Dev, Jiuquan 735019, Gansu, Peoples R China
4.PetroChina Res Inst Petr Explorat & Dev Northwest, Lanzhou 730020, Peoples R China
Recommended Citation
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]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2020,281:14.
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,281,14.
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):14.
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