| 唐山地区晚更新世以来的孢粉组合特征及其与邻区的对比 |
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| 关键词:sporo-pollen assemblages climate changes Late Pleistocene Tangshan area |
| 基金项目:河北省城市活断层探测与地震危险性评价项目(唐山市)(编号: 07-TSZT-05) |
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| Sporopollen Assemblages in Tangshan Area since Late Pleistocene with a Correlation to those in Adjacent Areas |
| Based on a study of 92 samples collected from the 60-meter deep core of an Upper Pleistocene and Holocene deposit at the site of the former 10th Middle School on Fuxing Road of Tangshan City, the authors have established four sporo-pollen complex zones. Plant successions and climate changes in Tangshan area since Late Pleistocene are summarized as follows: (1) Along sporopolen zone I, the vegetation was mainly from mixed coniferous and broad-leaf forest to grassland, and the climate was warm and moist. (2) Along sporopolen zoneⅡ, sparse woods-grassland represented the vegetation at that time, the limate was cold and dry, and this stage was the most terrible period since Late Pleistocene. (3) Along sporopolen zone Ⅲa, it was warm and moist, and the vegetation was from mixed coniferous and broad-leaf forest to grassland. (4) Along sporopolen zone Ⅲb, dark coniferous forest and grassland were eveloped, and the climate was cold and moist. (5) Along sporopolen zone Ⅲc, the vegetation was sparse woods-grassland, and the climate was cold and somewhat dry. (6) Along sporopolen zone Ⅳ, mixed coniferous and broad-leaf forest was developed, the climate was warm and moist, and this stage was a period with the best hydrothermal condition since Late Pleistocene. A comparison is also made with the achievements obtained in adjacent areas, global ice cores and deep sea sediments so as to investigate the characteristics of climate change in North China plain since Late Pleistocene. The hydrothermal condition of MIS3 was much better than that of MIS2 and MIS4 and reached an interglacial climate similar to that of MIS5, with local areas even exceeding that of MIS1. The climate of MIS2 varied from cold-moist to cold-dry instead of being always cold and dry. The results obtained in this paper provide an important basis for the study of Quaternary stratigraphic division and correlation as well as climate changes in North China plain. |
| LI Yu-song,CHEN Jian-qiang,ZHAO Shuo,WANG Hai-ying,LI Xin.2011.Sporopollen Assemblages in Tangshan Area since Late Pleistocene with a Correlation to those in Adjacent Areas[J].Acta Geoscientica Sinica,32(2):178-188. |
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