| 一个晚元古代水下冰足刻蚀作用的记录——水下冰推垄 |
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| 引用本文： | 张启锐.一个晚元古代水下冰足刻蚀作用的记录——水下冰推垄[J].地质科学,1991,0(4):396-398. |
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| 作者姓名： | 张启锐 |
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| 作者单位： | 中国科学院地质研究所, 北京100029 |
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| 摘 要： | 在现代高纬陆棚冰海区的海底底床上,有大量由海冰形成的水下冰足机械刻蚀迹,但在古代冰期地层中却极少报道。笔者在湖南省石门县中岭乡杨家坪的震旦系剖面上发现一丘状构造,经分析,推断为一水下冰足刻蚀记录(图1)。该构造出露于南华大冰期的下冰期地层东山峰组底界以下约60m,在渫水河组上部。
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| 关 键 词： | 晚元古代 冰川作用 扬子地台 水下冰足刻蚀迹 |
| 收稿时间： | 1990-05-01 |
| 修稿时间： | 1990-05-01; |
A LATE PROTEROZOIC ICE-KEEL SCOUR RECORDED IN SOUTH CHINA |
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| Zhang Qirui.A LATE PROTEROZOIC ICE-KEEL SCOUR RECORDED IN SOUTH CHINA[J].Chinese Journal of Geology,1991,0(4):396-398. |
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| Authors: | Zhang Qirui |
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| Institution: | Institute of Geology, Academia Sinica, Beijing 100029 |
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| Abstract: | Ice-keel scouring is popular in recent periglacial marine environment. In ancient gla-ciation records, however, few scour marks have been reported and none in China. Recently the author discovered one of the structure from the Sinian section in Yangjiaping area, Shi-men Country, Hunan Province. The mechanism for its formation is discussed in detail. Furthermore, it is argued that the scour mark resulted from sea-ice. |
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| Keywords: | Late Proterozoic glaciation Yangtze Platform Ice-keel scour mark Pe-riglacial environment |
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