中国西部MIS<sub>12</sub>冰期研究

周尚哲; 易朝路; 施雅风; 业渝光

中国西部MIS₁₂冰期研究

1. 兰州大学地理科学系, 兰州 730000;

2. 中国科学院武汉测量与地球物理所, 武汉 430077;

3. 中国科学院寒区和旱区环境与工程所, 兰州 730000;

4. 地质矿产部青岛海洋地质研究所, 青岛 266071

基金项目:
国家自然科学基金重点项目(49731010),中国科学院天山冰川站基金项目(9905和9901)

详细信息

作者简介: 周尚哲(1952-),男,教授,从事自然地理学的教学与研究.

中图分类号: P512.4⁺2

收稿日期: 2001-09-04

STUDY ON THE ICE AGE MIS₁₂ IN WESTERN CHINA

1. Department of Geography, Lanzhou Univesity, Lanzhou 730000, China;

2. Department of Environmental Sciene, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China;

3. Lanzhou Institute of Cold & Arid Area and Environment and Engineering, Chinese Academy of Sciences, Lanzhou 730000 China;

4. Qingdao Institute of Marine Geology, Ministry of Geology and Mineral Resources, Qingdao 266071, China

Received Date: 04 September 2001

摘要

摘要: 祁连山摆浪河上游和天山乌鲁木齐河源是现代冰川和第四纪冰川活动的地方。我们运用ESR技术对第四纪冰碛进行测年研究,摆浪河上游最老的中梁赣冰碛为462.9ka BP;乌鲁木齐河源最老的上槽谷高望峰冰碛为477.1ka BP和459.7ka BP,从而确认了中国西部山地冰川对全球化深海氧同位素12阶段(MIS₁₂)冰期的响应。
- 中国西部 /
- MIS₁₂冰期
Abstract: The dating is a very key problem in the study of Quaternary glaciation. Recent years, many technologies,for example,OSL (optically simulated luminescence),AMS (accelerating mass spectrometry), ESR (electron spin resonance) and so on, were used to date glacial deposits. Qilian Shan mounatains is the northeastern marginal mountains of the Qinghai-Tibetan Plateau and Tian Shan mountains is the big mountains in the center of Asia. The two mountains lie in the temperate arid region of Asia. However, because of appropriate precipitation in high attitude, there are a lot of contemporary glaciers in the two mountains. The glacial deposits and geomorphologies indicate that those glaciers occurred early and advanced for several times during Quaternary period. ESR technology was undertaken to define the timing of the glaciations and associated sediment deposition of the two mountains. The oldest moraine on the top of Zhonglianggan (2997m asl and 500m above the contemporary river level) in Bailang River Basin of Qilian Shan mountains was dated 462.9 ka BP. The oldest high Wafeng till (3450m asl and 250m above contemporary river level) of Urumqi River Basin, Tian Shan, was dated 477.1ka BP and 459.7ka BP.These datings show that the glaciers of the two mountains extended during marine isotopic stage 12(MIS₁₂) and implicate a response of the uplifted mountains to the global climatic deterioration.
- Western China /
- glaciation of MIS₁₂

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中国西部MIS12冰期研究

1. 兰州大学地理科学系, 兰州 730000; 2. 中国科学院武汉测量与地球物理所, 武汉 430077; 3. 中国科学院寒区和旱区环境与工程所, 兰州 730000; 4. 地质矿产部青岛海洋地质研究所, 青岛 266071

作者简介: 周尚哲(1952-),男,教授,从事自然地理学的教学与研究.

STUDY ON THE ICE AGE MIS12 IN WESTERN CHINA

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中国西部MIS₁₂冰期研究

1. 兰州大学地理科学系, 兰州 730000;

2. 中国科学院武汉测量与地球物理所, 武汉 430077;

3. 中国科学院寒区和旱区环境与工程所, 兰州 730000;

4. 地质矿产部青岛海洋地质研究所, 青岛 266071

STUDY ON THE ICE AGE MIS₁₂ IN WESTERN CHINA