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| 海南岛1605年历史地震的海岸沉积记录 | |
| 引用本文： | 张振克,孟红明,王万芳,李彦明,尤坤元,余克服.海南岛1605年历史地震的海岸沉积记录[J].海洋地质与第四纪地质,2008,28(3). |
| 作者姓名： | 张振克 孟红明 王万芳 李彦明 尤坤元 余克服 |
| 作者单位： | 1. 南京大学,海洋科学系,海岸与海岛开发教育部重点实验室,南京,210093;中国科学院,南海海洋研究所边缘海地质重点实验室,广州,510640 2. 南京大学,海洋科学系,海岸与海岛开发教育部重点实验室,南京,210093 3. 中国科学院,南海海洋研究所边缘海地质重点实验室,广州,510640 |
| 基金项目： | 国家自然科学基金项目 , 中国科学院边缘海重点实验室开放课题 |
| 摘 要： | 海南岛铺前港湾地区1605年发生了华南历史记录的最强烈的地震,地震强度为M7.5,地震造成陆地沉陷成海。根据野外海岸地貌调查和海岸钻孔沉积物岩性特征与粒度、元素比值分析结果,对历史地震的海岸沉积记录进行了初步的研究,4个钻孔位于铺前港湾西岸博度村附近的小型古海湾,昌德、演丰附近的野菠萝岛和道学附近的红树林区潮间带,钻孔沉积记录显示铺前港湾内湾沉陷幅度为2 m,存在明显的差异性,东寨港道学和野菠萝岛附近的钻孔岩心下部为泥状红土,属于成土的风化壳顶部,根据曲口半岛下山村附近的海岸调查,强海洋动力事件形成了高出现代高潮位3.0 m的高位海岸混杂沉积体,可能与1605年地震下沉引发的类似海啸的沉积事件相关。 |
| 关 键 词： | 历史地震 海岸沉积 地震陷落 海南岛 |
PRELIMINARY STUDY ON THE COASTAL SEDIMENTS RECORDS ABOUT THE HISTORICAL EARTHQUAKE IN THE YEAR OF 1605,HAINAN ISLAND, CHINA |
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| ZHANG Zhen-ke,MENG Hong-ming,WANG Wan-fang,LI Yan-ming,YOU Kun-yuan,YU Ke-fu.PRELIMINARY STUDY ON THE COASTAL SEDIMENTS RECORDS ABOUT THE HISTORICAL EARTHQUAKE IN THE YEAR OF 1605,HAINAN ISLAND, CHINA[J].Marine Geology & Quaternary Geology,2008,28(3). | |
| Authors: | ZHANG Zhen-ke MENG Hong-ming WANG Wan-fang LI Yan-ming YOU Kun-yuan YU Ke-fu |
| Institution: | ZHANG Zhen-ke~ |
| Abstract: | The serious earthquake in the year of 1605 occurred at Qiongshan in the region around Puqian Bay,northeastern Hainan Island,which was the most extensive earthquake recorded in the historical docu- ments in South China with the seismic intensity of M7.5.This historical earthquake resulted in the land subsidence and the formation of the Puqian Bay.According to the recent investigation of coastal land- forms,sedimentary characteristics of the boreholes and the analysis results about the grain size and ele- ment ratios,a preliminary study on the coastal sedimentary records about the historical earthquake was presented in this paper.Four boreholes were located at the abandoned bay close to Bodu village and in the mangrove tidal flat near Changde village,Yeboluo Island and Daoxue respectively.The comprehensive a- nalysis indicated the 2.0 m subsidence occurred at the inner part of the Puqian Bay.The boreholes at Daoxue and Yeboluo Island penetrated to the buried red soil,which was the terrestrial environment before the earthquake subsidence.The most interesting finding of coastal landform investigation along the Qukou Peninsula,mid-western Puqian Bay was the coastal gravel-sand deposit 3 m higher than the present high sea level,which was formed in the strong coastal dynamics and may be related to the influence of tsunami- like wave during the earthquake subsidence in the year of 1605.Further detailed study is needed for the a- nalysis about the sediment chronology, |
| Keywords: | historical earthquake coastal sediments earthquake subsidence Hainan Island |
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