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| 长江上源布曲盆地晚更新世湖相沉积的发现及其古植被与古气候 | |
| 引用本文： | 刘琦胜,赵希涛,叶培盛,胡道功,吴珍汉,严富华,马志邦.长江上源布曲盆地晚更新世湖相沉积的发现及其古植被与古气候[J].地质学报,2004,78(4):527-533. |
| 作者姓名： | 刘琦胜 赵希涛 叶培盛 胡道功 吴珍汉 严富华 马志邦 |
| 作者单位： | 1. 中国地质科学院地质力学研究所,北京,100081 2. 中国科学院地质与地球物理研究所,北京,100029 3. 中国地震局地质研究所,北京,100029 |
| 基金项目： | “青藏铁路沿线活动断层与地应力测量”项目 (编号 2 0 0 2 40 13和 12 12 0 10 3 40 3 0 2 )资助成果 |
| 摘 要： | 在青海省西南部青藏公路东南侧的通天河支流——布曲北岸 (33°4 4′4 5 .2″N,92°11′2 8.1″E) ,发现一条拔河 0～ 18m的湖相沉积剖面。湖相沉积物的 U系测年结果为 88.9～ 5 6 .2 ka,确定其沉积时代为晚更新世早中期。结合孢粉分析结果 ,本文探讨了青海省西部地区通天河及布曲流域晚更新世早中期的古植被与古气候。初步研究表明 ,在该剖面的下部和上部沉积期间 ,当地生长松、桦、冷杉等乔木和蒿等草本植物 ,气候比较温暖湿润。剖面中部沉积期间 ,蒿、藜、禾本科和麻黄等草原植被明显增多 ,气候凉爽干燥。剖面沉积期间气候曾经历过温暖湿润和凉爽干燥的波动。植被与气候的变化具有从末次间冰期晚期经末次冰期早冰段到末次冰期间冰段中期的特征 |
| 关 键 词： | 长江上源布曲盆地 晚更新世 湖相沉积 U系年龄 古植被 古气候 |
| 修稿时间： | 2004年2月18日 |
Discovery of Late Pleistocene Lacustrine Deposits in the Buqu Basin of the Yangtze River Source and Its Palaeovegetation and Palaeoclimate |
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| LIU Qisheng ,ZHAO Xitao ,YE Peisheng ,HU Daogong ,WU Zhenhan ,YAN Fuhua ,MA Zhibang Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing, Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing, Institute of Geology,China Seismological Bureau,Beijing.Discovery of Late Pleistocene Lacustrine Deposits in the Buqu Basin of the Yangtze River Source and Its Palaeovegetation and Palaeoclimate[J].Acta Geologica Sinica,2004,78(4):527-533. | |
| Authors: | LIU Qisheng ZHAO Xitao YE Peisheng HU Daogong WU Zhenhan YAN Fuhua MA Zhibang Institute of Geomechanics Chinese Academy of Geological Sciences Beijing Institute of Geology and Geophysics Chinese Academy of Sciences Beijing Institute of Geology China Seismological Bureau Beijing |
| Institution: | LIU Qisheng ,ZHAO Xitao ,YE Peisheng ,HU Daogong ,WU Zhenhan ,YAN Fuhua ,MA Zhibang Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing, Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing, Institute of Geology,China Seismological Bureau,Beijing |
| Abstract: | A section of lacustrine deposits of the Late Pleistocene was discovered in the Buqu Basin of the Changjiang (Yangtze) River source. The lacustrine deposits have U-series ages of 88.9 ka to 56.2 ka. Based on the U-series dating and sporo-pollen analysis, this paper presents a discussion on the paleovegetation and paleoclimate of the Buqu Basin and its adjacent regions during the interval 88.9~56.2 ka BP of the Late Pleistocene. A preliminary study shows that the evolution of vegetation and climate has experienced features of the late stage of the last interglaciation through the early stage of the last glaciation to the middle stage of the interglaciation of the last glaciation. |
| Keywords: | Buqu Basin of the Yangtze River source Late Pleistocene lacustrine deposits U-series age paleovegetation paleoclimate |
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