西秦岭迭山西北部冰川地貌分布及其特征

doi:10.7522/j.issn.1000-0240.2013.0095

冰川冻土 ›› 2013, Vol. 35 ›› Issue (4): 841-847.doi: 10.7522/j.issn.1000-0240.2013.0095

西秦岭迭山西北部冰川地貌分布及其特征

赵井东¹, 王杰², 沈永平¹, 殷秀峰¹, 伍云飞¹

1. 中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室, 甘肃兰州 730000;
2. 兰州大学西部环境教育部重点实验室, 甘肃兰州 730000

收稿日期:2013-03-18 修回日期:2013-05-16 出版日期:2013-08-25 发布日期:2013-09-11
作者简介:赵井东(1976-),男,江苏沭阳人,副研究员,2007年在中国科学院寒区旱区环境与工程研究所获博士学位,现主要从事第四纪冰川与全球变化研究.E-mail:jdzhao@lzb.ac.cn
基金资助:
全球变化研究国家重大科学研究计划项目(2010CB951401);国家自然科学基金项目(41071010;41230743;41171063);中国科学院知识创新工程重要方向性项目(KZCX2-EW-QN304);冰冻圈科学国家重点实验室自主课题(SKLCS-ZZ-20120003);中国科学院青藏高原研究所环境变化与地表过程重点实验室开放基金项目资助

Distribution and Features of Glacial Landforms in the Northwest of the Die Shan, West Qinling Mountains

ZHAO Jing-dong¹, WANG Jie², SHEN Yong-ping¹, YIN Xiu-feng¹, WU Yun-fei¹

1. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China;
2. Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, Lanzhou Gansu 730000, China

Received:2013-03-18 Revised:2013-05-16 Online:2013-08-25 Published:2013-09-11

摘要/Abstract

摘要： 迭山西北部位于青藏高原的东缘, 属西秦岭山脉的西段. 在海拔3 700 m以上保存有类型较为齐全的冰蚀地形(冰斗、刃脊、U形谷、悬谷、粒雪盆、鲸背岩与基岩磨光面等)与冰碛地形(侧碛垄与终碛垄). 采用野外考察、遥感影像解译与填图等方法对该区的冰川地貌分布及其特征进行了探讨. 基于研究区冰川地形分布与特征, 结合青藏高原现代的抬升速率、邻近山地冰川地形的年代学资料以及其他古环境研究成果进行综合分析得出: 该区的古冰川发育于末次冰期, 末次冰期最盛期是其最主要的形成期. 冰川最盛时面积约38 km², 为具有暖底性质的冰帽冰川.

关键词: 冰川地貌, 末次冰期, 冰帽, 青藏高原东缘

Abstract: The northwest of the Die shan, as the western segment of the Qinling Mountains, is located in the eastern margin of the Qinghai-Xizang Plateau. Glacial erosional and depositional landforms, including cirques, U-shaped valleys, hanging valleys, palaeo-firn basins, whaleback rocks, polished bedrocks, and lateral and end moraines are well preserved in this mountainous area above 3 700 m a.s.l. Remote-sensing techniques and field mapping were applied to study the distribution and features of glacial landforms in this area. Based on the distribution and features of glacial landforms, considering the present uplift speed of the Qinghai-Xizang Plateau, the available dating data of the glacial landforms in the Dalijia Mountain and the data of the palaeoenvironment in the neighboring areas, the glacial landforms are considered to be formed in the last glacial cycle, especially during the Last Glacial Maximum. The ancient glacier was an ice cap with a maximum area of about 38 km². Abundant whaleback rocks that present at about 4 200 m a.s.l. indicate that the ancient ice cap had a warm bottom.

Key words: glacial landforms, last glacial cycle, ice cap, eastern margin of the Qinghai-Xizang Plateau

中图分类号:

P931.4

赵井东, 王杰, 沈永平, 殷秀峰, 伍云飞. 西秦岭迭山西北部冰川地貌分布及其特征[J]. 冰川冻土, 2013, 35(4): 841-847.

ZHAO Jing-dong, WANG Jie, SHEN Yong-ping, YIN Xiu-feng, WU Yun-fei. Distribution and Features of Glacial Landforms in the Northwest of the Die Shan, West Qinling Mountains[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2013, 35(4): 841-847.

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西秦岭迭山西北部冰川地貌分布及其特征

Distribution and Features of Glacial Landforms in the Northwest of the Die Shan, West Qinling Mountains

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