| 秦岭太白盆地晚更新世晚期环境变迁 |
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| 引用本文： | 范淑贤,赵景波,吴锡浩,童国榜,张俊牌. 秦岭太白盆地晚更新世晚期环境变迁[J]. 地质力学学报, 1997, 3(4): 46-51 |
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| 作者姓名： | 范淑贤 赵景波 吴锡浩 童国榜 张俊牌 |
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| 作者单位： | 1. 地矿部水文地质工程地质研究所; |
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| 基金项目： | 中国科学院黄土与第四纪地质国家重点实验室资助 |
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| 摘 要： | 本文依据太白盆地拐里村晚更新世晚期沉积物中花粉谱,重建当时主要为含桦树的森林草原或灌丛草原,未见森林。孢粉波动幅度明显,记录了气候的强烈变化。该剖面存在四次孢粉贫乏事件(深度为15.6-15.8m、10.7-10.9m、5.6-5.8m和3.4-3.6m),其特点为木本植物花粉急剧减少,乔本植物花粉几乎为零,草本植物花粉增多。上述孢粉贫乏事件与渭南黄土古风化强度、磁化率以及SPECMAP氧同位素曲线具有较好的可比性,反映气候的冷暖波动基本一致,从而表明该区气候变化与全球气候变化基本同步。
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| 关 键 词： | 太白盆地 晚更新世 孢粉贫乏事件 孢粉植物群 |
ENVIRONMENT CHANGES DURING THE CLOSE OF PLEISTOCENE IN THE TAIBAI BASIN IN THE QINLING MOUNTAIN |
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| Fan Shuxian,Zhao Jingbo,Wu Xihao,Tong Guobang and Zhang Junpai. ENVIRONMENT CHANGES DURING THE CLOSE OF PLEISTOCENE IN THE TAIBAI BASIN IN THE QINLING MOUNTAIN[J]. Journal of Geomechanics, 1997, 3(4): 46-51 |
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| Authors: | Fan Shuxian Zhao Jingbo Wu Xihao Tong Guobang Zhang Junpai |
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| Affiliation: | 1. Institute of Hydrogeology and Engineering Geology, MGMR;2. Xi'an College of Geology;3. Institute of Geomechanics, MGMR |
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| Abstract: | The environment during the close of Pleistocene is reconstructed from the sporopollen spectrum of the Guali Village section.It was a butula-rich forest-steppe or bushveld steppe.The prominent fluctuation of sporopollen content indicates the intense change of climate.The section contained four poor sporopollen events(at depth 15.6-15.8m,10.7-10.9m,5.6-5.8m and 3.4-3.5m).It is characterized by a sharp decrease of woody plant with little or no tree pollen and a increase of herb pollen content.These... More |
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| Keywords: | Taibai basin close of Pleistocene poor sporopollen events sporopollen plant community |
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