| 东海北部陆架柱样中底栖有孔虫组合及其古环境研究 |
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| 引用本文： | 石丰登,程振波,石学法,吴永华,李小艳,刘东生,鞠小华.东海北部陆架柱样中底栖有孔虫组合及其古环境研究[J].海洋科学进展,2007,25(4):428-435. |
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| 作者姓名： | 石丰登 程振波 石学法 吴永华 李小艳 刘东生 鞠小华 |
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| 作者单位： | 1. 国家海洋局,第一海洋研究所,山东,青岛,266061;海洋沉积与环境地质国家海洋局重点实验室,山东,青岛,266061
2. 中国海洋大学,海洋地球科学学院,山东,青岛,266100 |
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| 基金项目： | 国家自然科学基金重点项目——末次冰期以来西北太平洋中高纬度边缘海关键断面古环境演化记录(40431002)，青岛市科技将才专项计划项目——西北太平洋中、高纬度边缘海古环境演化及其对青岛近海黄海海域矿产资源的影响(05-2-JC-79) |
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| 摘 要： | 东海北部陆架区D-46C和D-74C柱样底栖有孔虫分析结果表明,D-46C柱样自下而上为压扁卷转虫(Am-moniacompressiuscula)组合,并可以进一步划分出压扁卷转虫—花朵虫(A.compressiuscula-Florilusspp.)亚组合、压扁卷转虫—叶状串珠虫(A.compressiuscula-Textularia foliacea)亚组合和压扁卷转虫—强壮箭头虫(A.compressiuscula-Bolivina robusta)亚组合;D-74C柱样自下而上可以划分出三个组合:叶状串珠虫—压扁卷转虫(Textularia foliacea-Ammonia compressiuscula)组合、大西洋花朵虫—异地希望虫(Florilus atlanticus-Elphidium advenum)组合和大西洋花朵虫—结缘寺卷转虫(Florilus atlanticus-Ammonia ketienziensis)组合。两个柱样中底栖有孔虫组合垂向变化明显,结合AMS14C测年结果,初步认为两个柱样均为全新世以来的沉积。其中,D-74C柱样为全新世中期(相当于亚北方期)以来的沉积,在全新世晚期一直受到陆地冲淡水的强烈影响;D-46C柱样为全新世早期(相当于前北方期和北方期)以来的沉积,受到陆地冲淡水流的影响较D-74C柱样小。
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| 关 键 词： | 东海北部陆架 柱样 古环境 底栖有孔虫组合 |
| 文章编号： | 1671-6647（2007）04-0428-08 |
| 修稿时间： | 2006-12-26 |
Study on Benthic Foraminiferal Assemblages in Core Samples and Their Paleoenvironment on the Northern East China Sea Continental Shelf |
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| SHI Feng-deng,CHENG Zhen-bo,SHI Xue-fa,WU Yong-hua,LI Xiao-yan,LIU Dong-sheng,JU Xiao-hua.Study on Benthic Foraminiferal Assemblages in Core Samples and Their Paleoenvironment on the Northern East China Sea Continental Shelf[J].Advances in Marine Science,2007,25(4):428-435. |
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| Authors: | SHI Feng-deng CHENG Zhen-bo SHI Xue-fa WU Yong-hua LI Xiao-yan LIU Dong-sheng JU Xiao-hua |
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| Institution: | 1. First Institute of Oceanography, SOA, Qingdao 266061, China; 2. Key Lab of Marine Sedimentary and Environmental Geology, SOA, Qingdao 266061, China; 3. College of Marine Geoseciences, Ocean University of China, Qingdao 266100, China |
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| Abstract: | It is shown from the analysis results of bentic forminifera in Cores D-46C and D-74C on the East China Sea continental shelf that there is only an Ammonia compressiuscula assemblage in Core D-46C from bottom to top,and this assemblage can be further divided into 3 subassemblages,Ammonia compressiuscula-Florilus spp.subassemblage,A.Compressiuscula-Textularia foliacea subassemblage and A.compressiuscula-Boliuina robusta subassemblage;there are 3 assemblages in Core D-74C from bottom to top,and they are Textulania foliacea-Ammonia compressiuscula assemblage,Floriuls atlanticus-Elphidium advenum assemblage and Florilus atlanticus-Ammonia ketienziensis assemblage.The vertical variations in benthic foraminiferal assemblages in the two cores are obvious,and it is shown from the AMS 14C dating results that the sediments in the two cores were formed since the Holocene,among them,the sediments in Core D-74C were formed since the Middle Holocene(Subboreal stage) and were strongly affected by the diluted water from the land since the late stage of Holocene;the sediments in Core D-46C were formed since the early stage of Holocene(Preboreal stage and Boreal stage) and were less affected by the diluted water from the land compared with the sediments in Core D-74C. |
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| Keywords: | northern East China Sea continental shelf core sample paleoenvironment benthic foraminiferal assemblage |
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