北黄海盆地区域地质特征   总被引：6，自引：1，他引：6  

田振兴  张训华  薛荣俊 《海洋地质前沿》2004,20(2):8-10

北黄海盆地位于黄海的北部，由于勘探程度低，研究投入少，使得它成为我国迄今为止尚未发现油气的惟一海区。随着我国在南黄海盆地和朝鲜在北黄海盆地东部发现油气，如何实现北黄海盆地油气突破，成为我们研究的焦点。结合该区现有资料和前人研究成果，对北黄海盆地的地球物理场和地质构造特征进行了全面的论述，并在此基础上，对该区油气资源远景作了初步评价。  相似文献   

Experiments on the discrimination of fish and seabed echoes     

MacLennan  D.N.; Copland  P.J.; Armstrong  E.; Simmonds  E.J. 《ICES Journal of Marine Science》2004,61(2):201-210

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Nature of the connection between the Northern and Southern Zechstein Basins across the Mid North Sea High     

M.K. Jenyon  P.M. Cresswell  J.C.M. Taylor 《Marine and Petroleum Geology》1984,1(4):355-363

The seismic expression of a salt-filled channel which cuts across the Mid North Sea High in Quadrant 37 is described, with features interpreted as being produced by salt-edge dissolution forming both eastern and western margins of the channel. The apparent half-graben nature of the channel is shown to be only superficial, and due to complex faulting associated with, but not defining, its western margin. The shallower faulting here is a Mesozoic to early Tertiary growth fault related to local dissolution of Zechstein salt. The dissolution effect appears in turn to have been localized by the presence of a deeper fault that was already downthrown to the east in Zechstein times, when it seems to have limited the eastward progradation of Zechstein shelf carbonates and anhydrites, and had probably ceased to move significantly before the onset of the Late Cimmerian erosional phase. The origin of this arcuate fault is tentatively ascribed to subsidence around a granite batholith. Zechstein salt originally spread some distance to the east and west of the channel; it was dissolved from the edges inwards, mainly before the Late Cretaceous, giving rise to a thicker Mesozoic sequence on parts of the flanks of the channel than in the middle. Besides providing an interesting structural case history, the features described have implications regarding Zechstein sedimentation, reservoir potential, the tectonic history of the North Sea, and the nature of the Mid North Sea High itself.  相似文献   

动态基准实时测量系统的开发与应用   总被引：3，自引：0，他引：3  

卫建东  徐忠阳  张良琚 《海洋测绘》2005,25(1):31-35

介绍了动态基准实时测量系统的硬件组成、站点上全站仪棱镜组合安装与检测方法、系统软件的开发及特点，最后对系统在广州地铁某地铁站结构变形自动监测中的应用情况进行了阐述。通过实际应用表明该系统能应用在自动化、高精度的变形监测领域。  相似文献   

东海陆架外缘隆起带地质构造特征   总被引：1，自引：0，他引：1  

李桂群  李学伦 《中国海洋大学学报(自然科学版)》1995,(2)

根据地质、地球物理及钻探资料，结合周边区域地质资料，论证东海外缘隆起带前中中新世基底岩系组成及地质构造特征。  相似文献   

断阶型潜山带地质模型的建立及储层预测--以CG20潜山为例     

姜素华  王永诗  张家震  王军 《中国海洋大学学报(自然科学版)》2004,34(3):437-445

以 CG2 0潜山为例 ,从建立地质模型入手 ,包括地层模型、构造模型、储集模型、储盖组合模型、速度模型等 ,认识到各套地层分布和储层物性的差异均与地震响应密切相关 ,因此可以利用地震波的信息 ,预测潜山储层的发育及分布情况。在对 CG2 0潜山进行精细全三维构造解释的基础上 ,探讨性地应用了测井约束反演、吸收系数、相干分析及三维模式识别等技术 ,对潜山储层进行了预测 ,从而提高了潜山勘探的效益 ,并为类似断阶型潜山带的勘探提供了成功的经验 ,具有一定的指导意义。  相似文献   

长江河口横沙东滩自然演变及工程影响   总被引：5，自引：0，他引：5  

桑永尧  虞志英  金镠 《海洋学研究》2003,21(3):14-23

横沙东滩(含横沙浅滩)是长江河口主要浅滩之一,在浅滩两侧(北港和北槽主槽)水流控制下,受浅滩横比降形成的过滩水流和较强的风浪作用影响,滩面长期以来少有淤涨。通过对1995～2002年的地形资料(吴淞基面)进行研究分析表明:从总体上看随着北港主槽向南岸进逼,造成横沙东滩窜沟西部到白条子沙之间的滩区北沿明显内凹;随着长江口深水航道治理双导堤工程的实施,在北导堤产生的堵汊、导流和拦沙的作用下,白条子沙至横沙东滩沟滩面出现微淤;而横沙东滩窜沟以东滩面难以淤高。采用促淤工程和就近吹泥上滩方式,增加横沙东滩的滩面高程以加快造地,从而达到既疏浚航道又增加湿地面积的双赢效果。  相似文献   

底部浮泥表层推移速度分布的ADCP—GPS估测方法   总被引：3，自引：0，他引：3  

吴中  陈力平等 《海洋工程》2002,20(4):85-88

ADCP对底跟踪走航观测的流速数据中包含水体底部浮泥、底沙运动信息,对比GPS定位方法算出的水体流速数据可以分离出浮泥相对于GPS定位的运动信号,从而达到对底质推移观测的目的。  相似文献   

TSDV: A GIS tool for inspecting trawl survey data     

Fortunati  L.; Garofalo  G.; Demontis  R. 《ICES Journal of Marine Science》2002,59(1):168-178

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Seasonal dynamics in pelagic fish abundance in a Baltic Sea coastal area     

T. Axenrot  S. Hansson 《Estuarine, Coastal and Shelf Science》2004,60(4):541-547

The spring-spawning Baltic Sea herring spawn in coastal areas that also serve as nursery areas for the young fish during their first summer. In a bay known as a herring spawning and nursery area, the pelagic fish abundance was quantified using hydroacoustics every second week from late spring to autumn in 2000 and 2001. A dense system of survey transects allowed determination of the acoustic index (the nautical area scattering coefficient) for fish abundance with high precision. The variation, expressed as the geostatistical coefficient of variation, was on average 5% both years and ranged from 3–11% (2000) and 3–8% (2001). Through the hydroacoustic data intra-annual dynamics in acoustic fish abundance, densities and size composition could be followed, which showed similar trends in both years. In spring and early summer acoustic fish densities were low, followed by a drastic, 20-fold increase in late summer. Hydroacoustic data and biological samples suggest that the increase was caused mainly by the recruitment of young-of-the-year herring to the acoustically assessable pelagic fish community. This age class is commonly not well represented in catches when using traditional sampling gears such as gill nets and trawls, and hydroacoustics may help to improve quantitative estimates of small juvenile fish in order to increase the understanding of biological processes in coastal nursery areas.  相似文献