| 河西走廊地质记录中的新仙女木事件及其前后古地理环境演变 |
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| 引用本文： | 曹兴山,赫明林,曹炳媛.河西走廊地质记录中的新仙女木事件及其前后古地理环境演变[J].甘肃地质学报,2002(1):8-23. |
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| 作者姓名： | 曹兴山 赫明林 曹炳媛 |
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| 作者单位： | 甘肃省地勘局水文地质勘察院 甘肃张掖734000
(曹兴山，赫明林)，甘肃省地勘局水文地质勘察院 甘肃张掖734000(曹炳媛) |
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| 基金项目： | 国土资源部“西北地区水资源与可持续利用”科技专项计划资助项目 (2 0 0 0 10 30 1) |
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| 摘 要： | 新仙女木事件在河西走廊地区开始于 12 5 8ka·B·P ,结束于 9 4ka·B·P ,极盛期为11 0ka·B·P左右。新仙女木事件使河西走廊地区晚更新世末转温暖湿润的气候在 12 0～ 10 0ka·B·P之间发生间断。降温期间 ,突发性洪水、干旱、风暴、沙暴、尘暴极端事件和突发性火灾频繁发生。降水减少 ,湖泊干涸 ,生态环境恶劣 ,沙漠化日益严重。古地理环境的演变 ,影响和限制了动物群的繁衍和人类文化的发展。
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| 关 键 词： | 新仙女木事件 河西走廊 古地理环境 温暖湿润 寒冷干旱 |
GEOHISTORIC YOUNGER DRYAS EVENT AND PALEOGEOGRAPHIC
ENVIRONMENT EVOLUTION AROUND IT IN HEXI CORRIDOR |
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| CAO Xing shang,HE Ming lin and CAO Bing yuan.GEOHISTORIC YOUNGER DRYAS EVENT AND PALEOGEOGRAPHIC
ENVIRONMENT EVOLUTION AROUND IT IN HEXI CORRIDOR[J].Acta Geologica Gansu,2002(1):8-23. |
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| Authors: | CAO Xing shang HE Ming lin and CAO Bing yuan |
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| Institution: | Institute of Hydrogeology and Engineering Geology, Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Zhangye 734000,China;Institute of Hydrogeology and Engineering Geology, Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Zhangye 734000,China;Institute of Hydrogeology and Engineering Geology, Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Zhangye 734000,China |
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| Abstract: | The Younger Dryas Event in Hexi corridor began at 12·58ka·B·P,and ended at
9·4ka·B·P,during it flourishing period was around 11·0ka·B·P.The event made the end of late
Pleistocene Epoch in Hexi region to turn into warm and moist climate between 12·0~10·0ka·B·
P disconnectly.During falling temperature,flood,dry,tempest, sand and dust storm and unex-
pected fire happened frequently.Because of precipitation decreasing,lakes were dried,ecological
environment worsened and desert spreading.The evolution of Paleogeographic environment,it af-
fected and limited fauna to multiply and human cultural development. |
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| Keywords: | Younger Dryas Event Hexi corridor Paleogeographic environment Warm and moist Cold and arid |
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