| 晚更新世末期的陆架沙漠化环境 |
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| 引用本文： | 赵松龄,于洪军,严理.晚更新世末期的陆架沙漠化环境[J].海洋科学,1992,16(1):30-33. |
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| 作者姓名： | 赵松龄 于洪军 严理 |
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| 作者单位： | 中国科学院海洋研究所，中国科学院海洋研究所，中国科学院海洋研究所 青岛 266071，青岛 266071，青岛 266071 |
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| 摘 要： | 根据黄、渤、东海的浅地层剖面仪记录,作者发现晚更新世末期中国黄、渤、东海陆架曾发生过沙漠化。据目前所知,渤海的辽东浅滩、黄海的苏北浅滩、东海的台湾浅滩,都可能为独立的沙漠体,全新世海侵后将其淹没。衍生沉积可划分为3种类型,其一为完全埋藏型,构成南黄海北部的厚层泥质沉积区;其二为半埋藏性,如庙岛列岛一带的黄土沉积;其三为完全出露型,以南京附近的黄土沉积为典型。古季风的吹扬作用是海退后陆架发生沙漠化和产生一系列衍生沉积的基本动力。
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| 关 键 词： | 晚更新世 末期 陆架 沙漠化 |
| 收稿时间： | 1990/10/9 0:00:00 |
THE DESERTIZATION ENVIRONMENT OF SHELF REGION OF EAST CHINA SEA DURING THE LAST STAGE OF LATE PLEISTOCENE |
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| Zhao Songling,Yu Hongjun and Yan Li.THE DESERTIZATION ENVIRONMENT OF SHELF REGION OF EAST CHINA SEA DURING THE LAST STAGE OF LATE PLEISTOCENE[J].Marine Sciences,1992,16(1):30-33. |
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| Authors: | Zhao Songling Yu Hongjun and Yan Li |
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| Abstract: | The climax stage of the last glacial period began from about 25 000 a BP. The Mongolian High Pressure became much stronger conducing to the particular monsoon climate in Eastern Asia. The drainage system degenerated under cold climate condition at that time, rivers becoming shorter and narrower and even dried up or disappeared. Therefore, fluvial process gave way to wind process. The exposed shelf areas of loose sediments with sparse plants were subject to strong deflation, this turned to be desertized.Eolation was the major exogenetic force not only on land but also on shelf region in the ice age.'At the climax stage of last ice-age, northern part of China developed a thick layer of loose deposit. The shelf region at that time had the same sediment under a similar climatic condition. Because the shelf region was unprotected by vegetation in the ice-age, primary deposited strata were naturally remoulded under the intensive effect of wind storm into a new series of land sediment. |
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| Keywords: | Shelf desertization Derivative sediment |
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