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东海陆架

东海陆架的相关文献在1989年到2022年内共计88篇,主要集中在海洋学、石油、天然气工业、地质学 等领域,其中期刊论文69篇、会议论文19篇、专利文献356777篇;相关期刊30种,包括华东师范大学学报(自然科学版)、中国海洋大学学报(自然科学版)、沉积学报等; 相关会议2种,包括东海陆架盆地油气勘探战略研讨会、我国专属经济区和大陆架勘测研究专项学术交流会等;东海陆架的相关文献由254位作者贡献,包括李安春、李双林、杨作升等。

东海陆架—发文量

期刊论文>

论文:69 占比:0.02%

会议论文>

论文:19 占比:0.01%

专利文献>

论文:356777 占比:99.98%

总计:356865篇

东海陆架—发文趋势图

东海陆架

-研究学者

  • 李安春
  • 李双林
  • 杨作升
  • 郭志刚
  • 宋金明
  • 王中波
  • 蓝先洪
  • 刘振夏
  • 周晓静
  • 孟庆勇
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 赵俐红; 李一泉; 刘欣悦; 郑彦鹏; 赵强; 刘凯; 支鹏遥
    • 摘要: 东海因其特殊的构造位置而成为海洋科学研究的焦点,是海陆地质对比和深部地壳结构研究的理想场所。为此,本文基于在东海陆架地区布设的NW-SE向主动源广角深地震剖面,通过13个站位的震相分析,识别出丰富的Ps、PsP、Pg、PcP和PmP震相。利用射线追踪和走时拟合得到P波速度结构模型。模型表明,中、新生代沉积层埋深东高西低,测线西侧隆起处埋深约1.5~3.5 km,速度1.7~3.6 km/s;测线东侧凹陷处埋深约3.5~9.0 km,速度1.7~5.4 km/s;深部地壳分为上、下2层,其中上地壳底界面埋深13.0~14.5 km,界面起伏不明显,速度5.6~6.2 km/s,下地壳速度6.3~6.9 km/s,底部无明显速度扰动,推测未发育大规模的岩浆底侵及地幔上涌活动;莫霍面埋深26.5~28.5 km,具有凸-凹-凸的起伏形态;地壳厚度17.5~27.0 km,为有所减薄的陆壳,具有西厚东薄的特征,其中西侧隆起处拉张因子1.2,东侧凹陷处拉张因子1.3~1.8,表明东海陆架东部较西部经历了更加强烈的地壳拉伸减薄活动。
    • 宁泽; 徐磊; 林学辉; 密蓓蓓; 丛静艺; 张勇; 毕世普
    • 摘要: 为深入了解东海外陆架表层沉积物物质来源及沉积环境特征,运用粒度和矿物学研究手段,对济州岛西南海域180个表层沉积物样品进行沉积物类型和碎屑矿物组成分析,探讨了矿物分布特征与沉积环境的相互关系,进一步明确表层沉积物的输运模式、物质来源及环流系统对其分布的影响。结果表明,研究区重矿物共34种,以普通角闪石、绿帘石和钛铁氧化物类矿物为主,橄榄石和变质岩矿物是区别内陆架沉积的标志性矿物。轻矿物共13种,以普遍发育的海绿石为特征。根据碎屑矿物组合分布特征,将研究区分为Ⅰ、Ⅱ两个矿物组合区,并进一步将Ⅱ区划分为两个矿物组合亚区。中部现代沉积区(Ⅰ区)矿物组合为普通角闪石-绿帘石-自生黄铁矿-钛铁氧化物类矿物-片状矿物,表现为现代陆源沉积特征,物质来源以黄河为主,生物沉积和自生沉积也是该区重要的沉积方式。外围残留沉积区(Ⅱ区)为沉积作用缓慢的弱还原环境,Ⅱ-1亚区矿物组合为普通角闪石-绿帘石-钛铁氧化物类矿物-石榴石-橄榄石,认为是以古长江的残留前积沉积为基底,受到Ⅰ区影响,接受了少量悬浮再悬浮的现代陆源沉积,同时又具有区域独特性。Ⅱ-2亚区矿物组合为绿帘石-普通角闪石-钛铁氧化物类矿物-石榴石,认为是古长江的残留沉积,在中部冷涡作用下,很少有现代物质的加入,区内不排除在当地环境生长的生物体作用下与Ⅰ区互相调整的物质。本研究为今后在东海外陆架深入开展沉积学、矿物学及环境演化研究提供了新的参考。
    • 葛灿; 张卫国
    • 摘要: 在粒级分离的基础上,对长江河口及邻近陆架22个表层沉积物进行了磁学表征,探讨了磁性特征对物源、输运、沉积动力等环境信息的指示意义.研究结果表明,长江入海泥沙、残留砂及废黄河物质是长江口外水下三角洲及邻近陆架沉积物磁性特征的主要物源影响因素,但3者的空间分布不同.沉积物磁化率(x)、饱和等温剩磁(SIRM)、硬剩磁(HIRM)及非磁滞剩磁磁化率(xARM)的空间变化指示了长江入海泥沙出口门后向南及东南方向输运.SIRM与x及退磁参数(S-100)与SIRM关系图表明,大于63μm粒级沉积物来自残留砂与现代长江粗颗粒,其分布大致以30 m等深线为界;小于16μm粒级沉积物受长江和废黄河物质的影响,口内为长江源,口外北部贴岸以废黄河源为主,口外其他区域则表现为以长江物质占主导的混合源.沉积物粒度和磁学特征的空间变化反映了动力的粒度和密度分选作用,并体现在沉积环境分区磁性特征差异及分粒级组分对全样SIRM贡献的空间变化上.粒级分离减小了粒度效应对全样磁性特征的干扰,提高了沉积物物源判别的准确性,在反映三角洲地貌变化及物源定量识别上具有重要意义.
    • 张桃; 李君益; 谢玲玲; 郑少军; 郑慧源
    • 摘要: 基于1993—2017年卫星高度计海面高度异常中尺度涡旋追踪数据集,对东海陆架区及从西北太平洋入侵东海的涡旋进行路径分类、季节变化及特征参量统计分析,并结合再分析流场资料,进行背景流场、涡度场分析.研究结果显示,近25 a,在东海追踪到318个气旋涡和276个反气旋涡.根据涡旋运动路径将其分为:东海陆架浅海生成往深海传播型(148个)、深海生成向东海陆架浅海传播型(35个)、沿等深线运动型(180个)、徘徊型(121个)、外来入侵到达东海陆架型(25个)及外来入侵到达东海深海型(85个).6类涡旋的数量存在明显的季节分布,各个类型气旋与反气旋涡数量的季节分布也各不相同.其中,沿等深线运动型涡在春、夏季的数量高于秋、冬季.陆架浅海区生成往深海运动型涡的季节分布较为平均,气旋式涡在夏季数量最少,在春季和冬季数量较多.黑潮与涡旋数量的季节分布有关.徘徊型涡的平均生命周期最长,约为44 d;陆架浅海生成往深海运动型及外来入侵到达东海陆架的中尺度涡具有最大的平均振幅,为13.2 cm;外来入侵到达东海陆架型涡具有最大的直径,为122 km;外来入侵到达东海深海型涡在进入东海后的生命周期、振幅、直径在数值上均为最小.
    • 邓凯; 杨守业; 黄湘通; 徐娟
    • 摘要: 碎屑锆石年代学常被用于示踪物源、重建源区古地理以及揭示区域构造-沉积演化历史。分析和收集了台湾山溪性河流及大陆东南部中小河流的碎屑锆石U-Pb年龄,探究了山溪性中小河流碎屑锆石年代学的主要控制因素,及对东部海区沉积物源的示踪意义。河流碎屑锆石年龄组成与流域基岩性质比较研究揭示,大陆东南部中小河流碎屑锆石年代学与流域基岩所经历的构造-岩浆活动对应,而台湾山溪性小河流的碎屑锆石年代学与流域沉积岩的构造-沉积演化历史密切相关。中国东南部山溪性中小河流的碎屑锆石年龄组成揭示出三类不同的物源端元:(1)东南沿岸的小河流具有极高的燕山期锆石峰值;(2)东南部中等流域规模的河流以明显的加里东期锆石峰值为特征;(3)台湾西部山溪小河具有较高比例的前寒武纪锆石以及明显的晋宁期和吕梁期峰值年龄。这些物源端元特征的确立为今后示踪末次冰期阶段东海内陆架和台湾海峡的粗粒沉积物来源提供重要参考。
    • 张凯棣; 李安春; 卢健; 张晋
    • 摘要: To identify the provenance of sediments in the East China Sea continental shelf,multiple magnetic parameters,sediment grain size,and detrital mineral compositions were measured from surface sediments collected in 69 sites.The susceptibility (2),saturation isothermal remanent magnetization (SIRM),S ratio,and κ-T curve of typical samples show that the magnetic mineralogy is dominated by magnetite with a small amount of hematite and ilmenite,which is consistent with the results of detrital minerals identification under the microscope.Magnetic parameters (frequency-dependent magnetic susceptibility (xfd%),xARM/x,xARM/x and xARM/SIRM) suggested that the magnetic mineral particles are finer in the west of the study area.In the southwest Jeju Island sediments are dominated by single-domain and pseudo-single-domain particle with relatively high concentration of super-paramagnetic particles.While in the middle-outer continental shelf the magnetic mineral particles are dominated by pseudo-single-domain and multi-domain particles.In terms of magnetic parameters S-300,SIRM/x,and SIRM,the surface sediments can be divided into three types.Type 1 sediments are mainly distributed in the western part of the continental shelf and the northeastern part of the study area.It mainly consists of modern fine grained sediments with high magnetic mineral content,and the magnetic mineral content is positively correlated with silt and clay content.Type 2 sediments are distributed in the middle-outer continental shelf and dominated by coarse relict sediments in low magnetic mineral content and show no significant correlation between the magnetic mineral content and grain size.Sediments in Type 3 are distributed in the eastern part of the study area with high magnetic mineral content and coarse grain size.To a certain extent,the grain size of the magnetic mineral particles is controlled by sediment particles,and the correlation between the content of magnetic minerals and the grain size is different among the three types.The magnetic properties of the samples reflect three major provenances as discriminated in S-100 vs.SIRM diagrams in comparison with available studies concerned:the Changjiang (Yangtze) River for most sites,Huanghe (Yellow) River for the northeastern sites,transported by the Yellow Sea coastal current,and Zhejiang-Fujian coastal area in some sites affected by human activities and Oujiang River input.%对东海陆架69个表层沉积物样品进行了环境磁学测试,并结合重矿物鉴定和粒度分析数据讨论了其磁学特征、影响因素和物源指示意义.结果表明研究区表层沉积物中磁性矿物以磁铁矿为主,同时含有少量的磁赤铁矿和赤铁矿.这一结果与碎屑矿物镜下鉴定结果一致.根据磁学参数S-300 (-300mT磁场下饱和等温剩磁的矫顽参数)、SIRM/x(饱和等温剩磁与磁化率之比)及SIRM(饱和等温剩磁),将东海陆架表层沉积物分为三类.第一类沉积物主要分布在西部内陆架及研究区东北部的细粒沉积区,磁性矿物含量较高,亚铁磁性矿物所占比例较小,磁性矿物颗粒细;第二类分布在中外陆架,磁性矿物含量低,亚铁磁性矿物比例相对较高,磁性矿物颗粒粗;第三类沉积物分布在研究区东部部分站位,磁性矿物含量高,亚铁磁性矿物含量也高,磁性矿物颗粒粗.沉积物整体的粒度粗细控制了磁性矿物颗粒的大小,且在以现代细粒沉积物为主的第一类沉积物中,磁性矿物含量与粉砂、黏土含量成正相关关系.S-100-SIRM (-l00mT磁场下饱和等温剩磁的矫顽参数-饱和等温剩磁)散点图显示,东海陆架大部分区域沉积物磁学特征与长江沉积物一致,表明物质来源于长江;研究区东北部受到黄海沿岸流搬运来的黄河物质的影响磁学性质呈现出黄河物质特征;闽浙沿岸部分站位受到人类活动及瓯江物质的影响.
    • 杨德周; 于仁成; 袁华茂; 李新正; 袁涌铨; 尹宝树; 侯一筠; 孙松; 俞志明; 宋金明; 许灵静; 于非; 宋秀贤
    • 摘要: 基于中国科学院战略性先导科技专项(A类)“热带西太平洋海洋系统物质能量交换及其影响”的项目二“黑潮及其变异对中国近海生态系统的影响”的航次调查资料、历史资料和数值模拟结果,对黑潮入侵东海的途径、机理和影响研究取得了重要进展,主要认识和成果如下.在长江口邻近海域的赤潮高发区,多学科研究结果证实存在黑潮入侵东海陆架近岸的底部分支,该分支是黑潮影响近海生态过程的主要途径.进一步的研究发现该底部分支存在季节变化:通常情况下,在春季开始出现,在夏季7月份达到最强,可以入侵到近岸50m等深线位置,向北可到达30.5°N附近,然后在秋、冬季其入侵主轴位置逐渐远离岸线向外海偏移,不会入侵到50m等深线以西的近岸区域,该底部分支出现和赤潮发生具有一定的同步性.数值模拟和观测结果表明黑潮入侵底部分支还存在年际变化.基于地球动力学理论,提出了地形β-spiral理论,并为模拟结果和观测资料所验证,该理论可以很好的解释为什么黑潮入侵分支会存在,并且该理论预测出凡是黑潮路径与等深线不平行的地方都会发生入侵流的垂向偏转,底层流的方向和地形梯度的角度决定了入侵主要发生在底层还是表层,且该理论在世界大洋具有普适性.此外,研究还表明,黑潮入侵底部分支可以把具有高磷酸盐、高盐、溶解氧含量相对较低等特征的黑潮次表层水及热带藻种等物质输送到长江口邻近海域,从而对东海陆架生态系统产生重要影响.%Based on abundant data collected in the cruise under Project 2 (The Ecosystem in the Chinese Coastal Seas under the Influence of Kuroshio and Its Variation) of the Strategic Priority Research Program of the Chinese Academy of Sciences (Class A) (Material and Energy Exchange and Its Influence between Ocean Systems in Key Domains of Tropical Westem Pacific Ocean),we studied the Kuroshio invasion into the East China Sea:the path,force,and impact,and achieved with good results.Our multiple-disciplinary observations confirm the existence of Kuroshio branch currents off Zhejiang coasts,the frequent algal bloom region.The Kuroshio branch current is the key current affecting the coastal ecosystem,and shows significant seasonal variation.It appears in spring and peaks in July reaching the nearshore area within the 50m-isobath near 30.5°N,and then gradually weakens and withdraws from the 50m-isobath zone in autumn and winter.It nearly co-occurs with algal blooming.Moreover,both observation and modeling show an inter-annual variation of the branch current.To explain the dynamical mechanism of this branch current,we proposed a theory of topographic beta spiral in geophysical fluid dynamics,and well explained the existence of Kuroshio branch current,which has been approved by model results and observations.Furthermore,the theory predicts that the intrusion could occur whenever the mainstream of Kuroshio is not parallel to the isobaths.The surface or bottom intrusion could take place when the angle between the Kuroshio path and the topographic gradient is greater than 90°,which has been proved applicable for the world oceans.The branch can carry phosphate,salinity,low oxygen water,and algal cysts into coastal areas off Changjiang (Yangtze) River estuary and the adjacency,and then significantly influence the local coastal ecosystems.
    • 王启栋; 宋金明; 袁华茂; 李学刚; 李宁
    • 摘要: 根据2014年5-6月对台湾以东黑潮主流以及东海陆架海域的调查,研究了海水中放射性核素K-40、Ra-226和U-238的分布特征,并以放射性核素为指标定量评估了黑潮入侵东海的程度和范围.结果表明,黑潮主体放射性核素的含量有明显的层次差异,整体上看从表层至深层逐渐减小,K-40、Ra-226和U-238的含量范围分别为13.47-26.11、5.08-9.51和7.38-14.72mBq/L.在台湾东部河流带来的陆源物质输入影响下,黑潮主流下游的放射性核素含量略高于上游.从水平分布上看,近岸海域放射性核素含量明显高于黑潮主流区,而长江口和杭州湾外也存在K-40和Ra-226的低值区,并且底层海水中更明显.海水的物理化学参数对放射性核素分布的影响不大,不同水团放射性核素的含量差异主要由陆源物质输入的不同引起.以放射性核素K-40、Ra-226以及温盐为指标,根据端元混合模型的计算结果显示,黑潮在台湾东北部涌升后,继续沿东北方向流动,并可入侵至长江口和杭州湾外,而福建近岸海域基本不受黑潮水的影响.放射性核素指标K-40和Ra-226可作为温盐参数的补充,用于指示黑潮入侵东海的程度和范围,并可结合温盐参数,用于多水团混合的半定量研究.%We studied the distribution of K-40,Ra-226,and U-238 in the Kuroshio mainstream (KM) and East China Sea (ECS) using radionuclide as a tracer to assess the extent of Kuroshio intrusion into the ECS.We found that radionuclide concentrations were different in different layers of the KM,and in general,the concentrate decreased downwards in the ranges of 13.47-26.11,5.08-9.51,and 7.38-14.72mBq/L for K-40,Ra-226,and U-238,respectively.As the KM flows through the east of Taiwan Island,the radionuclide concentration increased slightly,mainly because of the terrestrial material input brought by rivers of eastern Taiwan.In overall,the radionuclide concentration in the coastal sea was higher than in the KM as well as in the sea off the Changjiang (Yangtze) River mouth and Hangzhou Bay (CJM-HZB).Physical and chemical parameters of seawater had litter influence on the distribution of radionuclide,and the difference in radionuclide concentration in different water masses was due mainly to terrestrial material input.Based on K-40,Ra-226,temperature,and salinity data,we calculated the proportion of KM to the ECS using an end-member mixing model.The results show that the KM flows northeastward after it upwells in the northeastern Taiwan,and reaches in the area of CJM-HZB but Fujian coastal regions.Therefore,K-40 and Ra-226 could be used as supplementary parameters of temperature and salinity to indicate the extent and scope of Kuroshio intrusion into the ECS,and as a tracer to estimate the mixing of water masses along the Kuroshio path.
    • 宋金明; 袁华茂
    • 摘要: The exchange of biogenic elements between Kuroshio and the East China Sea has a significant impact on the ecological environment of the East China Sea.The exchange takes place as water goes into the East China Sea shelf from the northeastern coast of Taiwan and goes out of the East China Sea through Kyushu southwestern waters.Some new insights have been achieved by the observations of chemical properties in both the Kuroshio and the adjacent East China Sea.In the northeastern region off Taiwan,the input of carbon is mainly from the surface water and subsurface water with the flux higher in autumn than that in summer,while the nutrient fluxes which almost in dissolved forms are mainly originated from subsurface water and intermediate water and with the higher flux in spring than that in summer and in autumn,which would favor spring bloom in the East China Sea.The Kuroshio intrusion features by its N/P ratio that nearly the same to the Redfield ratio and can alleviate the extremely high N/P ratio in nearshore the East China Sea.Based on the geochemical characteristics of dissolved barium (Ba) and salinity in both Kuroshio and East China Sea waters,the Kuroshio subsurface water intrusion can be traced with the current northwest along the bottom of the middle shelf from the break shelf northeast of Taiwan to the Qiantang River estuary,where the proportion of Kuroshio subsurface water was nearly 65%.In vertical,the influence of Kuroshio subsurface water was more significant in the outer shelf water and its proportion in TW0-1 surface water could reach 50%,but the influence was relatively smaller in bottom water and within the middle of the shelf.%黑潮与东海生源要素的交换对东海的生态环境有重大影响,交换主要是经台湾东北部海域输送至东海陆架和通过日本九州西南海域由东海陆架向外海的黑潮输出两个通道.中国科学院海洋先导专项对黑潮与邻近东海生源要素的交换特征进行了系统的调查和研究,获得了一些新的认识:(1)在台湾东北部区域,碳主要以表层水-次表层水为载体输入,秋季的输入量高于夏季;黑潮溶解态营养盐的输入占据绝对主导地位,且以黑潮次表层热带水-中层水的输入为主,输入通量春季高于夏、秋季,可为东海春季水华提供一定的物质基础,但输入到东海的黑潮水其氮磷比与Redfield比值(16∶1)接近,这些“正常水”——黑潮的输入显然对调和东海异常高的氮磷比有重要的作用,从而对东海的生态环境起到“稳定和缓冲”作用.所以,黑潮水对东海的输入不仅维持补充了东海生态系统运转所需的生源要素,更为重要的是缓冲了受人为影响强烈的东海海水的高氮磷比,使东海本已失常的营养盐结构向合适的氮磷比方向转变.因此,黑潮与东海生源要素的输入在一定程度上起着稳定和缓和东海生态环境的作用.(2)通过构建的海水Ba-盐度新指标体系,定量细致刻画了黑潮对东海生源物质在台湾东北部区域的输入范围和程度,黑潮次表层水从台湾东北陆架坡折处沿底部向北偏西方向入侵东海,其近岸分支可以入侵到浙江近岸,其黑潮次表层水占比仍可达到65%左右.垂直方向上,陆架外侧站位受黑潮次表层水的影响范围更大,黑潮水占50%比例位置可延伸至外侧TW0-1站位(122.59°E,25.49°N)表层,而内侧靠近大陆的站位则只限于陆架中部位置底层.
    • 刘伟123; 宋金明124; 袁华茂124; 李宁124; 李学刚124; 段丽琴124
    • 摘要: 通过对台湾以东黑潮主流径及邻近东海海域2014年5~6月期间的调查,研究了海水中溶解钡(Ba)的地球化学分布特征,评估了黑潮对东海海水Ba的影响和输入通量,将Ba作为指示指标定量刻画了黑潮入侵东海的范围与程度.黑潮主流径各站位海水中溶解Ba垂直分布上从表层至深层浓度逐渐增高,浓度范围为4.91~19.2μgL-1.东海海域表层海水Ba浓度分布以近岸海域为最高,向外海逐渐降低;底层则出现近岸和外侧海域Ba浓度高,陆架中间海域Ba浓度低的现象.水交换模型估算得出黑潮水在5~10月间向东海的Ba输入通量共计为2.19×108kg,并以次表层水的输入通量为最大.调查海域Ba的分布特征指示黑潮在台湾东北部海域涌升,台湾海峡北向出水抑制黑潮表层水向东海陆架入侵,黑潮次表层水从陆架底层外侧逐渐影响东海.以溶解钡(Bal作为端元估算参数计算得出,在调查期间,黑潮表层水对东海陆架区域影响不大,黑潮次表层水沿陆架底层向上爬升,从台湾东北海域沿陆架中部向西北方向侵入,形成一支黑潮入侵流,至钱塘江口附近黑潮水占比仍可达到65%左右.东海陆架底层外侧大部被黑潮水所控制,100m等深线以深处黑潮水能够占95%以上的比例.在台湾东北部DH9断面,黑潮次表层水从陆架坡折处沿底部向西侵入,黑潮水占比95%的位置可达122°E左右,垂直向上黑潮水所占比例越小.海水溶解Ba可以细致地刻画黑潮入侵东海的情景,其地球化学特性使其成为指示黑潮入侵东海的有效指标,为定量揭示黑潮与东海的相互作用提供了新的手段.
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