| 河北平原三河市S9钻孔第四纪孢粉记录及其气候指示意义 |
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| 作者姓名： | 吕可欣 石光耀 张欢 张金龙 李庆喆 张鹏程 |
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| 作者单位： | 1.河北省地球物理勘查院,河北 廊坊 065000; 2.河北省区域地质调查院,河北 廊坊 065000 |
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| 基金项目： | 中国地质调查局“特殊地质地貌区填图试点——河北1∶5万大厂回族自治县等三幅第四系覆盖区地质填图(编号:DD20160060)”“河北1∶5万沙流河等四幅区域地质调查项目(编号:DD20160042-4)”项目联合资助。 |
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| 摘 要： | 为探讨更新世以来河北平原东部植被演化和气候变化特征,研究分析了大厂凹陷S9钻孔的孢粉植物群。根据S9钻孔中孢粉的分布,自下而上划分了6个孢粉组合,组合I和组合II为以针叶树为主的针阔叶混交林,组合Ⅲ—Ⅵ为疏林草原植被,整体为稀树草原型植被环境。根据孢粉组合的变化特征,还原了研究区更新世以来的气候变化规律: 研究区在早更新世气候温暖半干旱; 中更新世早期气候变冷,之后气候总体呈变暖变干旱的趋势; 晚更新世早期气候持续变暖,由湿润向干旱转变。研究区的孢粉演化模式与我国中北部许多地区的植被演化模式相似,同时与东亚、北太平洋以及南半球的气候变化特征表现出了较好的一致性。
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| 关 键 词： | 孢粉组合 第四纪 气候变化 河北省 |
| 收稿时间： | 2020-11-30 |
Quaternary palynological records and climatic signifiance of S9 borehole in Sanhe City of Hebei Plain |
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| Authors: | LV Kexin SHI Guangyao ZHANG Huan ZHANG Jinlong LI Qingzhe ZHANG Pengcheng |
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| Institution: | 1. Geophysical Exploration Academy of Hebei Province, Hebei Langfang 065000, China; 2. Regional Geological Survey Institute of Hebei Province, Hebei Langfang 065000, China |
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| Abstract: | For exploring the evolution characteristics of vegetation and climate in eastern Hebei Plain since Pleistocene period, the authors in this paper studied the palynoflora of the S9 borehole in Dachang Depression. According to sporopollen distribution of S9 borehole, 6 sporopollen assemblages were divided from bottom to up. The assemblage Ⅰ and Ⅱ were broad-leaved mixed forests dominant by the coniferous, with assemblage Ⅲ-Ⅵ were sparsely forested grassland vegetation, the whole area was dominant by savannah-type vegetation environment. Besides, the climate change regularity was restored based on the palynological assemblages. In Early Pleistocene, the climate of the study area was warm and semi-arid, and the climate became cold in the beginning of Middle Pleistocene, with warm and dry trends in general afterwards. In Late Pleistocene, the climate of the study area continued to get warm, with the transition from wet to dry. The evolving pattern of palynoflora in the study area was similar with environment change of other regions in North Central China, and is well consistent with climate change characteristics of East Asia, North Pacific and the Southern Hemisphere. |
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| Keywords: | palynological assemblage Quaternary climate change Hebei Province |
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