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| 海南岛北西部新构造特征及其演化研究 | |
| 引用本文： | 张军龙,田勤俭,李峰,高站武,苏刚.海南岛北西部新构造特征及其演化研究[J].地震,2008,28(3). |
| 作者姓名： | 张军龙 田勤俭 李峰 高站武 苏刚 |
| 作者单位： | 1. 中国地震局地质研究所,北京,100036;中国地震灾害防御中心,北京,100029 2. 中国地震灾害防御中心,北京,100029;中国地震局地震预测研究所,北京,100036 3. 中国地震灾害防御中心,北京,100029 4. 中国地震局地震预测研究所,北京,100036 |
| 基金项目： | 基本科研业务专项资金 |
| 摘 要： | 利用DGPS系统测量海南岛西部阶地,绘制地质地貌综合剖面,将西部阶地分为海成阶地和河流阶地两种。其中海成地貌包括一条砂堤和四级阶地:砂堤宽2~10m,高程约10m,形成于5ka以来;海成一级阶地发育较好,阶地面高程21~22m,形成于晚更新世至全新世之间;海成二级阶地顶面高程约32m左右,形成于晚更新世晚期;海成三级阶地较为发育,阶地面高程40~42m,形成于121.8ka;海成四级阶地零星分布,阶地面高程约57m,形成于中更新世晚期。河流阶地也可分出四级:一级阶地高程约20m,局部发育,形成于11.4ka;二级阶地高程约34m,形成于47.2ka;三级阶地高约50m,其基座顶面标高约41m,形成于晚更新世早期;四级阶地高程约71m,基座面标高约60m,形成于中更新世晚期。这些阶地中均以二级最为发育。晚更新世以来全区处于整体加速抬升的状态。依据阶地面的综合剖面特征,认为王五-文教断裂晚更新世以来的活动性较弱。 |
| 关 键 词： | 海南岛 新构造 阶地 王五—文教断裂 |
Study on neotectonic characteristics and its evolution in northwestern Hainan Island |
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| ZHANG Jun-long,TIAN Qin-jian,LI Feng,GAO Zhan-wu,SU Gang.Study on neotectonic characteristics and its evolution in northwestern Hainan Island[J].Earthquake,2008,28(3). | |
| Authors: | ZHANG Jun-long TIAN Qin-jian LI Feng GAO Zhan-wu SU Gang |
| Abstract: | The terraces in western Hainan Island have been measured by using DGPS system. Based on their geomorphic feature, two type terraces are divided. One is marine landform including a sand bank and four terraces. The sand bank is 10 meters high and formed since 5000a. The first terrace is 20 meters high and formed nearly in Holocene. The second terrace is 32~34 meters high and formed in late Pleistocene. The third terrace is 40~42 meters high and formed since nearly 121.8 ka. The fourth terrace is 57~62 meters high and only occurred in a few counties and formed in late mid-Pleistocene. The other is fluvial landform, including four terraces. The first terrace is 20 meters high and formed since 11.4 ka. The second terrace is 34 meters high and formed since 47.2ka. The third terrace is 50 meters high, but the elevation of surface of terrace base is 41 meters, which formed in the early stage of late Pleistocene. The fourth terrace is 71 meters high, but the elevation of surface of terrace base is 60 meters, which formed in the late stage of middle Pleistocene. The second terrace is well developed. Since Late Pleistocene, the whole region accelerates uplifting. Furthermore, the activity of Wangwu-Wengjiao fault may be weaker. |
| Keywords: | Hainan Island Neotectonic Terrace Wangwu-wengjiao fault |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |