仇建东^1,2,,
刘健^1,2,,,
张勇¹,
陈彬¹,
张欣¹,
岳娜娜³
1. 中国地质调查局青岛海洋地质研究所, 山东 青岛 266071
2. 青岛海洋科学与技术试点国家实验室, 海洋地质过程与环境功能实验室, 山东 青岛 266237
3. 自然资源部第一海洋地质研究所, 山东 青岛 266061

基金项目: 青岛海洋科学与技术试点国家实验室海洋地质过程与环境功能实验室开放基金资助项目（批准号：MGQNLM201801）和中国地质调查局地质调查大项目（批准号：GZH200900501和DD20190276）共同资助


详细信息

作者简介: 仇建东, 男, 36岁, 高级工程师, 海洋地质专业, E-mail:jiandongqiu@163.com

通讯作者: 刘健, E-mail:liujian0550@vip.sina.com

中图分类号: P722.5;P532

收稿日期:2019-12-08
修回日期:2020-03-06
刊出日期:2020-05-30

Sedimentary environment evolution in the northwestern South Yellow Sea since the Late Pleistocene

Qiu Jiandong^1,2,,
Liu Jian^1,2,,,
Zhang Yong¹,
Chen Bin¹,
Zhang Xin¹,
Yue Nana³
1. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, Shandong
2. Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, Shandong
3. First Institute of Oceanography, Ministry of Natural Resource, Qingdao 266061, Shandong


More Information

Corresponding author: Liu Jian,E-mail:liujian0550@vip.sina.com

MSC: P722.5;P532

--> Received Date: 08 December 2019
Revised Date: 06 March 2020
Publish Date: 30 May 2020


摘要
摘要:利用在南黄海西北部陆架获得的3500 km高分辨率浅地层剖面资料，结合3口地质钻孔的岩芯资料，建立了研究区晚更新世以来的沉积地层格架，厘定了地层地质年代。研究表明，过孔的浅地层剖面与钻孔岩芯的沉积地层有很好的对应关系。浅地层剖面可划分出5个主要不整合面（T5~T1）和6个主要地震单元（SU6~SU1），相应的钻孔岩芯可划分出6个主要的沉积单元（DU6~DU1），反映了大约128 ka以来的地层结构和沉积环境演化。钻孔沉积物岩性相特征、测年数据和地层反射特征表明研究区氧同位素5期（MIS 5）发育了滨浅海相和三角洲相沉积，MIS 4发育了河流湖泊相沉积，MIS 3发育了三角洲相沉积，MIS 2发育了河流和河口相沉积，MIS 1发育了近岸水下楔形沉积。晚更新世以来，南黄海构造相对稳定，影响沉积环境演化的主要因素是海平面变化和沉积物物源。本文的研究对于深入了解南黄海西北部陆海相互作用过程、地质环境演化以及揭示全球变化的区域响应具有重要的科学意义。
关键词: 沉积环境/
晚更新世/
南黄海

Abstract:Based on the 3500 km high-resolution shallow seismic profiles acquired in the northwestern South Yellow Sea and lithological data of three boreholes, the stratigraphic framework of the study area was established with ages since the Late Pleistocene. The shallow seismic profile data fit well with the stratigraphic pattern disclosed by drilling cores, upon which 5 major reflective interfaces(T5~T1)were identified and 6 major seismic units(SU6~SU1), 6 depositional units(DU6~DU1)were divided for seismic and core data, which mainly revealed the stratigraphic structure and sedimentary environment evolution since about 128 ka. The lithologic characteristics, dating data of core sediments and strata reflection characteristics indicated that it formed marina neritic facies and deltaic facies deposits in MIS 5, lacustrine facies deposit in MIS 4, deltaic facies deposit in MIS 3, fluvial-estuary facies deposit in MIS 2 and nearshore subaqueous clinoform deposit in MIS 1. Due to the stable tectonics of South Yellow Sea since Late Pleistocene, the main factors influencing the sedimentary environment evolution are sea level change and sediment sources. Our results will scientifically significance to better understanding land-sea interaction process, sedimentary environment evolution in the northwestern South Yellow Sea and to probe into the regional response of the global changes.
Key words:sedimentary environment/
Late Pleistocene/
South Yellow Sea



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