ISSN 1006-3021 CN11-3474/P
Published bimonthly started in 1979
关键词:Fushun Basin  Xiloutian Formation  Extreme Hot events  Eocene paleoclimate
基金项目:中国地质调查局地质调查二级项目(编号: DD20221643);中国地质科学院基本科研业务费项目(编号: JKY202012; YWFBC201801)
白悦悦 中国地质调查局中国地质科学院地球深部探测中心 
王灼 吉林大学地球科学学院
孙平昌 吉林大学地球科学学院
李元吉 吉林大学地球科学学院
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Paleoclimate Evolution of the Eocene Xiloutian Formation in the Continental Fushun Basin in the Warm House Background
      Paleogene Palaeocene to Early and Middle Eocene Extreme Hot events and Late Eocene Cooling paleoclimate events are current research hotspots in the fields of sedimentology and paleoclimatology, but there are few studies about it in continental strata. Most research on the Paleogene hyperthermal events were mainly conducted in the marine strata. Predecessors have identified and studied the origins of the Eocene Extreme Hot events in Fushun Basin, but the fluctuations about the late Eocene cooling-trend paleoclimate have not been systematically analyzed. In this study, we first carried out the paleoclimate parameters of magnetic susceptibility and chromaticity data to study the fluctuations and evolution of the paleoclimate of the Eocene Xiloutian Formation (Late Eocene) in the Fushun Basin. Through cluster analysis and vertical evolution comparison of high-precision magnetic susceptibility and chromaticity data, it was found that the sedimentary records of the Xiloutian Formation have high-frequency magnetic susceptibility (12.58%–39.63%), medium-high chromaticity a* value (5.6%) and medium-high chromaticity b* value (9.1%), and these values have good correspondence with paleo-temperature. Given this, these two parameters can be used as effective means to study the evolution of the continental Eocene paleoclimate. From bottom to top in the Eocene Xiloutian Formation of the Fushun Basin, the frequency magnetic susceptibility shows a slow downward trend from high value to low value, and the chroma a* value and b* value generally both show first a increasing and then a decreasing trend. These all show the cooling process in the late Eocene Fushun Basin. This research understanding of the late Eocene paleoclimate evolution, combined with previous research results about the early Eocene paleoclimate evolution, can jointly provide reliable materials for the Eocene complete paleoclimate evolution in East Asia.
BAI Yue-yue,WANG Zhuo,SUN Ping-chang,LI Yuan-ji.2022.Paleoclimate Evolution of the Eocene Xiloutian Formation in the Continental Fushun Basin in the Warm House Background[J].Acta Geoscientica Sinica,43(6):917-924.
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