| 辽东湾北部晚更新世中期以来的地层结构及环境演化 |
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| 引用本文： | 吴建政,孙洪光,亓发庆,许振强.辽东湾北部晚更新世中期以来的地层结构及环境演化[J].海洋科学进展,2005,23(4):452-459. |
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| 作者姓名： | 吴建政 孙洪光 亓发庆 许振强 |
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| 作者单位： | 1. 中国海洋大学,海洋地球科学学院,山东,青岛,266003
2. 国家海洋局,第一海洋研究所,山东,青岛,266061 |
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| 摘 要： | 晚更新世中期以来，辽东湾是一个在海侵一海退旋回中连续接受沉积的沉降盆地。在对岩心和高分辨率地层剖面记录分析的基础上，得到了本地区的地层结构和地震反射资料。从海底往下120．4m的岩芯可划分为16个沉积层，沉积物以粗粒物质为主。根据地震反射资料，本区地层可分为6个地震单元，分别属于3个海相层和3个陆相层。与Bcl孔相同，研究区沉积地层与冰期旋回具有明显的对应关系，冰期时形成陆相地层，间冰期时形成海相地层。冰期时河流作用较为发育。并且绝大多数河流沉积被风力作用所改造。
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| 关 键 词： | 辽东湾北部 晚更新世 地层结构 环境演化 |
| 文章编号： | 1671-6647(2005)04-0452-08 |
| 收稿时间： | 2005-01-24 |
| 修稿时间： | 2005年1月24日 |
Stratigraphic Structure and Environmental Evolution in the Northern Liaodong Bay Since the Middle Stage of Late Pleistocene |
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| WU Jian-zheng,SUN Hong-guang,QI Fa-qing,XU zheng-qiang.Stratigraphic Structure and Environmental Evolution in the Northern Liaodong Bay Since the Middle Stage of Late Pleistocene[J].Advances in Marine Science,2005,23(4):452-459. |
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| Authors: | WU Jian-zheng SUN Hong-guang QI Fa-qing XU zheng-qiang |
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| Institution: | 1. College of Marine Geosciences , Ocean Uniwersit y of China, Qingdao 266003, China; 2. Fist Institute of Oceanography, SOA, Qingdao 266061, China |
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| Abstract: | Since the middle stage of Late Pleistocene, the Liaodong Bay has been a subsiding basin to continuously receive sediments during regression-transgression cycles. Based on the analysis of core and high resolution stratigrapbic profile records, the stratigrapbic structure and seismic reflection data in the area are obtained. The core 120. 4 m long shows 16 depositional strata, and its sediments are mainly coarse-grained components. According to the seismic reflection data, the strata in the area can be divided into 6 seismic units, and belong to 3 marine focies strata and 3 continental facies strata, respectively. Similar to those in Core Bc-1, the depositional strata in the area have obvious corresponding relation to the glacial-interglacial cycles, that is, the continental facies strata were formed during the glacial periods, and the marine facies strata were formed during the interglacial periods. The riverine actions were more developed during the glacial periods, and most of riverine deposits were rebuilt by the wind actions. |
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| Keywords: | northern Liaodong Bay Late Pleistocene stratigraphic structure environmental evolution |
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