| 河套盆地西山咀凸起区湖相地层的发现及其测年 |
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| 引用本文： | 范天来,范育新,魏国孝.河套盆地西山咀凸起区湖相地层的发现及其测年[J].地理学报,2011,66(5):698-708. |
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| 作者姓名： | 范天来 范育新 魏国孝 |
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| 作者单位： | 兰州大学西部环境教育部重点实验室,兰州,730000 |
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| 基金项目： | 973项目，国家自然科学基金项目 |
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| 摘 要： | 在位于河套盆地内部的西山咀凸起区发现了典型的湖滩岩、湖蚀平台和一套较完整的湖相沉积地层.基于海拔高程的推断,地貌和地层沉积记录指示西山咀地区曾经存在过一个海拔达到1080m上下的古湖面.完整的沉积地层反映西山咀凸起区经历了深湖相-滨湖相-冲洪积相-风成堆积的演变过程.光释光测年结果表明,在距今65ka前后,"吉兰泰-河...
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| 关 键 词： | 湖相沉积 光释光年代 西山咀凸起区 河套盆地 第四纪 |
New Findings and Dating of Lacustrine Sediments in the Xishanzui Subuplift, Hetao Basin |
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| FAN Tianlai,FAN Yuxin,WEI Guoxiao.New Findings and Dating of Lacustrine Sediments in the Xishanzui Subuplift, Hetao Basin[J].Acta Geographica Sinica,2011,66(5):698-708. |
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| Authors: | FAN Tianlai FAN Yuxin WEI Guoxiao |
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| Institution: | FAN Tianlai,FAN Yuxin,WEI Guoxiao (MOE Key Laboratory of West China's Environmental Systems,Lanzhou Universsity,Lanzhou 730000,China) |
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| Abstract: | A complete sedimentary profile composed mainly of typical lacustrine sediments including beachrock and cut-and-built platform located in the Xishanzui subuplift, Hetao Basin, has been found. The geomorphological and stratigraphic evidence indicates that there was a paleolake with its highest lake up to 1080 m a.s.l. Stratigraphic analysis of the profile indicates that this subuplift experienced an environmental change from a deep lake to a shallow lake and then to non-lake environment (suggested by alluvial... |
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| Keywords: | lacustrine sediments optical dating Xishanzui subuplift Hetao Basin Quaternary |
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