南海北部东沙隆起西侧陆坡坡折处浊流沉积  

Turbidites at the continental slope on the west side of Dongsha uplift in the northern South China Sea

作　　者：周杨锐[1] 朱友生 周松望[1] 刘剑涛[1] 王世龙[1] 庄丽华[2,3,4] ZHOU Yang-rui;ZHU You-sheng;ZHOU Song-wang;LIU Jian-tao;WANG Shi-long;ZHUANG Li-hua(China Oilfield Services Limited,Tianjin 300451,China;Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Key Laboratory of Marine Geology and Environment,Chinese Academy of Sciences,Qingdao 266071,China;Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China)

机构地区：[1]中海油田服务股份有限公司,天津300451 [2]中国科学院海洋研究所,山东青岛266071 [3]中国科学院海洋地质与环境重点实验室,山东青岛266071 [4]中国科学院海洋大科学研究中心,山东青岛266071

出　　处：《海洋科学》2018年第2期23-33,共11页Marine Sciences

基　　金：南海深水油气开发示范工程(2011ZX05056);国家自然基金面上项目(41576056);南海北部陆坡区深水浅层沉积物沉积环境与沉积规律(G1417CS-B12C046)~~

摘　　要：为了分析南海北部上陆坡东沙隆起西侧海域海底稳定性,对A和B两个岩芯进行了AMS14C测年、浮游有孔虫氧同位素分析、粉色红拟抱球虫Globigerinoides ruber鉴定、粒度分析等工作。综合研究表明,A、B岩芯分别发育了距今920 ka BP、960 ka BP以来的更新世、全新世地层。A岩芯3.3~14.08 m层位地层发生了倒转,这与3.3m、6.12~6.18 m发育的两个浊积层有关。在71.5~71.63 m(冰期370 ka BP左右)也发育一浊积层。B岩芯在9.2 m、25.2~28.6 m等层位发育了浊积层。同样位于陆坡坡折,水深较大的A岩芯,由于滑坡导致的浊流活动略强一些。To analyze the seabed stability in the paleoenvironmental evolution of the west side of Dongsha uplift area in the northern South China Sea slope, two sample cores A and B were analyzed by AMS radiocarbon-14 dating analysis, planktonic foraminifer oxygen isotope analysis, pink Globigerinoides ruber identification, organic analysis, and granularity analysis. The comprehensive study showed that layers in cores A and B were respectively developed in the Pleistocene and Holocene layers since about 920 kaBP and 960 kaBP. A stratigraphic reversal was found in the layer from 3.3 m to 14.08 m in core A, which was related to the turbidite at 3.3 m and 6.12–6.18 m. There was a turbidite at 71.5–71.63 m that was about 370 ka BP in core A and two turbidites at 9.2 m and 25.2–28.6 m in core B. Although the two cores are located at the same slope break, the landslide activity caused by turbidity was slightly stronger in core A than that in core B.

关 键 词：南海北部 层倒转 粉色Globigerinoides ruber 浊流沉积 沉积速率 

分 类 号：P756[天文地球—海洋科学]