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南沙群岛永暑礁90多万年以来的海平面变化
赵焕庭1, 孙宗勋1, 宋朝景1, 朱袁智1, 陈欣树1, 沙庆安2
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
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
DOI：
分类号:
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
THE CHANGE OF SEA-LEVEL OF YONGSHU REEF IN NANSHA ISLANDS SINCE 900000 YEARS B.P.
Zhao Huanting1, Sun Zongxun1, Song Chaojing1, Zhu Yuanzhi1, Chen Xinshu1, Sha Qingan2
1.South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301;2.Geological Institute, Chinese Academy of Sciences, Beijing 100029
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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