Nenjiang Formation, palynological assemblages, paleoclimate,oxides, Lishu fault depression


,"/> Palynological Records and Paleoclimatic Characteristics of Nenjiang Formation in Lishu Fault Depression, Songliao Basin

Journal of Jilin University(Earth Science Edition) ›› 2023, Vol. 53 ›› Issue (5): 1391-1402.doi: 10.13278/j.cnki.jjuese.20220130

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Palynological Records and Paleoclimatic Characteristics of Nenjiang Formation in Lishu Fault Depression, Songliao Basin

Gao Yuan，Qin Tian，Li Ruihong，Zhou Yeze，Liu Hang，Li Mingjun，Zhu Chunguang，Liu Wantao   

  1. Langfang Center for General Survey of Natural Resources, China Geological Survey, Langfang 065000，Hebei，China

  • Online:2023-09-26 Published:2023-10-24
  • Supported by:
    Supported by the Project of China Geological Survey （DD20211590）

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Abstract:

Based on the sporopollen analysis of the strata in the 21.47-38.26 m section of ZK004 borehole in the Lishu fault depression, Songliao basin, and combined with the quantitative analysis results of oxide samples, this stratum is divided into two sporopollen assemblages from bottom to top, of which the ZK004-Ⅰ assemblage is dominated by Classopollis-Cedripites-Schizaeoisporites-Callistopollenites-Borealipollis, reflecting the transition from semi-humid   tropical-subtropical  climate to  humid subtropical climate; the ZK004-Ⅱ assemblage is dominated by Cedripites-Rugubivesiculites-Schizaeoisporites-Deltoidospora-Cyathidites-Borealipollis, reflecting the transition from  humid subtropical climate to semi-humid subtropical climate, which generally displays semi-humid northern subtropical climate, providing new evidence for the recovery of the paleoclimate and paleovegetation of the second member of Nenjiang Formation in the Late Cretaceous.


Key words: Nenjiang Formation')">

Nenjiang Formation, palynological assemblages, paleoclimate, oxides,
')"> Lishu fault depression


CLC Number: 

  • P532
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