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| 引用本文: | 赵焕庭,孙宗勋,宋朝景,朱袁智,陈欣树,沙庆安.南沙群岛永暑礁90多万年以来的海平面变化.海洋与湖沼,1996,27(3):264-270. |
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| 南沙群岛永暑礁90多万年以来的海平面变化 |
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赵焕庭1, 孙宗勋1, 宋朝景1, 朱袁智1, 陈欣树1, 沙庆安2
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1.中国科学院南海海洋研究所 广州 510301;2.中国科学院地质研究所 北京 100029
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| 摘要: |
| 于1990年5－6月在永暑礁礁坪上打一全采芯的地质研究钻井，编号为南永1井，总进尺为152.07m，对岩芯详细的地质年代学、地层学、相学和岩石学等进行多学科的分析研究。结果表明，永暑礁地区的海平面目早更新世晚期以来经历了4次上升和间隔的3次下降，形成了4个沉积旋回及其间的3个沉积间断。海平面呈波动式上升趋势。 |
| 关键词: 南沙群岛 永暑礁 海平面变化 古气候 新构造运动 |
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| 基金项目:中国科学院南沙综合科学考察队调查研究报告D-00042号 |
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| THE CHANGE OF SEA-LEVEL OF YONGSHU REEF IN NANSHA ISLANDS SINCE 900000 YEARS B.P. |
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Zhao Huanting1, Sun Zongxun1, Song Chaojing1, Zhu Yuanzhi1, Chen Xinshu1, Sha Qingan2
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1.South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301;2.Geological Institute, Chinese Academy of Sciences, Beijing 100029
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| Abstract: |
| During May and June, 1990, a geological research core at Yongshu Reef flat named core Nanyong-1 (l52.07m deep) was drilled. According to the detailed and multidisciplinary data of geochronology, stratigraphy, facies and petrology of core Nanyong-1, the changing curve of sea-level of Yongshu areas since 900000 years B.P. was drewed; Analytical result showed that the sea-level had 4 rises and 3 falls intermediately since late stage of Early Pleistocene, and formed 4 sedimentary cycles and 3 sedimentary interrupted surfaces. Generally, the sea-level rose fluctuatedly. |
| Key words: Nansha Islands, Yongshu Reef, Change of sea-level, Palaeoclimate, Neotectonic movement |
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