环渤海地区海洋经济增长质量空间溢出效应研究   总被引：4，自引：2，他引：2  

李博  田闯  金翠  史钊源 《地理科学》2020,40(8):1266-1275

海洋经济向质量效益型转变是建设海洋强国的新要求。通过构建海洋经济?地理距离空间权重矩阵对2000—2014年环渤海地区17个沿海地级市海洋经济增长质量主体的空间交互作用及空间效应进行研究；借助空间计量模型对海洋经济增长质量空间效应影响因素进行甄别。研究表明：① 环渤海地区海洋经济增长质量主体呈显著空间相关性，存在空间交互作用；② 海洋经济增长质量存在空间溢出的正反馈效应。影响因素中对环渤海地区海洋经济增长质量的直接贡献强度排序为：海洋环境>海洋产业>海洋人才>海洋资本>海洋科技，对其他地区溢出效应影响的排序为：海洋基建>海洋人才>海洋资本。研究为环渤海地区海洋政策制定提供一定参考依据。  相似文献   

渤海湾表层沉积物元素地球化学分布特征与影响因素     

张连杰  朱龙海  张盼  赵博  王鹏 《海洋科学》2019,43(6):78-87

对取自渤海湾的307个表层沉积物进行了元素测试和粒度分析。渤海湾表层沉积物的常微量元素呈现4种组合:富集于粗粒沉积区的SiO_2、Na_2O亲碎屑元素组合;富集于细粒沉积区的以Al_2O_3和重金属元素为代表的亲黏土元素组合;与缺氧环境有关的MnO、V、TOC元素组合和与河流输入有关的陆源CaO、TiO_2元素组合。粒度粗细主导了渤海湾元素含量分布的整体格局;海域河流物源供应不同较大影响了渤海湾南部(富Na_2O、CaO和SiO_2)和北部(富Ba和P_2O_5)在元素含量上的差异;高流速潮流对海底的冲刷再分配导致曹妃甸南侧Sr、Ca元素的条带状富集异常;有机质在细粒沉积区的富集导致缺氧环境的形成和K_2O、Mn、V、自生黄铁矿的海洋自生化学沉积;人类活动导致以Pb为代表的重金属污染在河流入海口、港口及沿岸海域的元素分布异常;曹妃甸沙坝内侧的泻湖(海洋钙质生物沉积)与沙坝外侧水下岸坡(陆源碎屑沉积)的截然不同的物源,导致了独特地貌沉积环境下元素分布的局部差异。  相似文献   

Numerical Study on Tidal Mixing in the Bohai Sea     

Yifei Zhao  Ting Yu  Hu Wang 《Marine Geodesy》2019,42(1):46-63

The spatial and temporal variability of tidal mixing in Bohai Sea is studied using a numerical approach. In calculating tidal mixing, accurate barotropic tidal current is obtained via a harmonic analysis package utilizing the simulated current output from a high-resolution regional ocean model. And a “small-scale” roughness map is adopted to describe the detailed topographic features of Bohai Sea. It is shown that the tidal mixing estimated in Bohai Sea is much higher than the level of global background, and fluctuates considerably at some regions within a single day. In Liaodong Bay, Bohai Bay and Bohai Strait, the mixing varies greatly, with the peak value of O (10^?2) m² s^?1. The order of magnitude of mixing in Laizhou Bay is about O (10^?5～10^?3) m² s^?1. Mixing with background level of O (10^?5) m² s^?1 only appears in central area. Result also shows that rough topography plays relatively a more important role than tidal current in enhancing diapycnal mixing in Bohai Sea. The distributions of tidal mixing in selected sections reveal that the vertical stratification in Bohai Sea is not obvious, generally renders a barotropic structure.  相似文献   

断层附近地应力扰动带宽度及其影响因素   总被引：3，自引：3，他引：0  

翁剑桥  曾联波  吕文雅  刘奇  祖克威 《地质力学学报》2020,26(1):39-47

在建立正断层模型的基础上，利用三维有限元数值模拟方法研究了断层附近地层中的地应力变化规律。其结果表明，由于断层活动，在断层附近普遍发育应力扰动带；在应力扰动带范围内，地应力方向和大小发生明显的变化，断层中部附近应力值普遍较低，而断层端部的应力值通常异常增大。应力扰动带的分布范围主要受断层规模的控制，与断裂带的岩石力学性质、断层走向、断层面形态和边界应力条件等因素也密切相关。随断层长度和断距逐步增大，应力扰动带的宽度相应增加。断裂带的岩石越破碎，其岩石弹性模量越低，断层对地应力的影响宽度越大。断层走向与区域最大水平主应力方向越接近垂直、断距与断层长度的比值越大，区域内的差应力越大，则扰动带宽度与断层规模的比值也越大。选择渤海湾盆地BZ-X油田进行验证，在建立油田实际三维地质模型基础上，根据边界应力条件，利用三维有限元方法对沙河街组二段的地应力分布进行了数值模拟计算。根据断层周围的地应力变化，确定了应力扰动带的分布范围，断层附近应力扰动带宽度的分布规律与正断层模型分析结果相一致。   相似文献   

渤海湾盆地北塘凹陷古近系湖相白云岩 地质特征及古环境意义          下载免费PDF全文

林春明  王兵杰  张霞  张妮  江凯禧  黄舒雅  蔡明俊 《高校地质学报》2019,25(3):377

湖相白云岩是渤海湾盆地北塘凹陷古近系沙河街组三段发现的一种特殊油气储层类型。根据钻井岩心、古生物、薄 片、扫描电镜及电子探针等分析，确定了该套白云岩的主要岩石类型及矿物特征，并通过地球化学特征分析，对白云岩的 形成环境进行了探讨。北塘凹陷白云岩常与泥岩和方沸石岩呈互层状产出，其次为均匀块状；矿物成分主要有白云石、方 沸石、粘土矿物等。通过X射线衍射、主微量元素地球化学分析，对白云岩形成时的古盐度、古温度、水深、氧化还原条 件等进行了研究，认为研究区白云岩沉积于高盐度、较高水体温度和较高PH值的半咸水湖湾还原环境。海水的侵入使湖水 的含盐度增大，提供了有利的物理化学条件，促进了白云岩的形成。  相似文献   

渤海湾盆地歧口凹陷地层压力结构特征     

姜文亚  宋泽章  周立宏  蒲秀刚  王娜  代昆  万伟超  刘祥柏 《吉林大学学报(地球科学版)》2020,50(1):52-69

深化含油气沉积盆地的压力结构研究，厘清异常压力的空间展布，对划分含油气系统、评价有利输导体系与明确勘探甜点区带具有重要的理论和实践意义。为深化渤海湾盆地富油凹陷的油气二次勘探，本文以歧口凹陷为研究对象，对其压力结构进行重点刻画。在实测地层压力的校正下，综合单井、连井和二维地震地层压力结构分析，厘清了歧口凹陷的压力结构特征，识别出4类纵向压力结构：①单超压带结构；②双超压带结构；③多超压带结构；④静水压力结构。纵向上，歧口地区存在3类纵向压力系统样式——单超压系统、双超压系统、静水常压系统。双超压系统是歧口凹陷的主要压力系统样式，广泛发育于主凹和各大次凹；从凹陷中心向盆地边缘，双超压系统逐渐向单超压系统、静水常压系统过渡。单超压系统主要分布于盆地边缘的斜坡和潜山区，如歧北高斜坡、羊三木-扣村潜山等。静水常压系统则主要分布在离深凹区更远的沈青庄潜山和埕北斜坡区域。上部超压系统和下部超压系统的顶板分别位于东营组和沙三段内部，侧向上受盆地边缘和深大断裂控制。上部超压系统的形成主要受欠压实作用控制，以歧口主凹为中心呈环带分布；而下部超压系统的形成主要受生烃作用控制，以主凹和几大次凹为中心分布。未来，下部超压系统中保存的天然气将成为歧口地区超深层天然气勘探的重点对象。  相似文献   

OCEANOGRAPHY & MARINE GEOLOGY     

《Abstract of Chinese Geological Literature》2014,(4)

正20141900Lan Xianhong(Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,Ministry of Land and Resources,Qingdao 266071,China);Zhang Zhixun Geochemical Characteristics of Trace Elements of Sediments from Drillhole SFK-1  相似文献   

Perfluoroalkyl and polyfluoroalkyl substances in sediments from South Bohai coastal watersheds,China     

Zhaoyun Zhu  Tieyu Wang  Pei Wang  Yonglong Lu  John P. Giesy 《Marine pollution bulletin》2014

This study investigated the concentrations and distribution of Perfluoroalkyl and polyfluoroalkyl substances (PFAS) in sediments of 12 rivers from South Bohai coastal watersheds. The highest concentrations of ΣPFAS (31.920 ng g⁻¹ dw) and PFOA (29.021 ng g⁻¹ dw) were found in sediments from the Xiaoqing River, which was indicative of local point sources in this region. As for other rivers, concentrations of ΣPFAS ranged from 0.218 to 1.583 ng g⁻¹ dw were found in the coastal sediments and from 0.167 to 1.953 ng g⁻¹ dw in the riverine sediments. Predominant PFAS from coastal and riverine areas were PFOA and PFBS, with percentages of 30% and 35%, respectively. Partitioning analysis showed the concentrations of PFNA, PFDA and PFHxS were significantly correlated with organic carbon. The results of a preliminary environmental hazard assessment showed that PFOS posed the highest hazard in the Mi River, while PFOA posed a relative higher hazard in the Xiaoqing River.  相似文献   

Distribution Characteristics and Accumulation Model for the Coal-formed Gas Generated from Permo-Carboniferous Coal Measures in Bohai Bay Basin, China: A Review     

JIANG Youlu  HU Hongjin  Jon GLUYAS  ZHAO Kai 《《地质学报》英文版》2019,93(6):1869-1884

Coal-formed gas generated from the Permo-Carboniferous coal measures has become one of the most important targets for deep hydrocarbon exploration in the Bohai Bay Basin, offshore eastern China. However, the proven gas reserves from this source rock remain low to date, and the distribution characteristics and accumulation model for the coal-formed gas are not clear. Here we review the coal-formed gas deposits formed from the Permo-Carboniferous coal measures in the Bohai Bay Basin. The accumulations are scattered, and dominated by middle-small sized gas fields, of which the proven reserves ranging from 0.002 to 149.4×108 m3 with an average of 44.30×108 m3 and a mid-point of 8.16×108 m3. The commercially valuable gas fields are mainly found in the central and southern parts of the basin. Vertically, the coal-formed gas is accumulated at multiple stratigraphic levels from Paleogene to Archaeozoic, among which the Paleogene and PermoCarboniferous are the main reservoir strata. According to the transporting pathway, filling mechanism and the relationship between source rocks and reservoir, the coal-formed gas accumulation model can be defined into three types: "Upward migrated, fault transported gas" accumulation model, "Laterally migrated, sandbody transported gas" accumulation model, and "Downward migrated, sub-source, fracture transported gas" accumulation model. Source rock distribution, thermal evolution and hydrocarbon generation capacity are the fundamental controlling factors for the macro distribution and enrichment of the coal-formed gas. The fault activity and the configuration of fault and caprock control the vertical enrichment pattern.  相似文献   

渤、黄海生态环境模拟的参数敏感度空间差异分析     

罗辰奕  聂红涛  张海彦 《海洋学报》2019,41(8):85-96

随着海洋生态系统模型的发展，生态变量增多，众多生物过程参数量值的确定成为制约生态环境模拟的瓶颈问题，生态系统结构区域性要求模型中的生态参数具有区域差异。为探究不同海区的关键参数及参数敏感度的空间差异，本研究在渤、黄海建立了ROMS-CoSiNE物理–生物耦合的高分辨率生态系统模型，并对13种生态参数的敏感度空间分布进行分析。结果表明:南黄海中部与渤海及近岸海域的敏感度差异较大。渤海敏感度最大的参数为决定光合速率的浮游植物P-I曲线初始斜率，其次为浮游动物捕食半饱和常数和浮游动物最大捕食率。而南黄海中部敏感度最大的参数为浮游动物最大捕食率，其次为浮游植物死亡率和浮游植物P-I曲线初始斜率。结合敏感度分布及浮游植物生物量收支得出，渤海水体透明度较南黄海偏低、浮游植物生长光限制较强，是引起浮游植物P-I曲线初始斜率敏感度在渤海高于黄海的主要原因。浮游动物最大捕食率及浮游植物死亡率的敏感度空间差异，受渤、黄海浮游植物生物量差异的影响，与生态系统中的高度非线性特征有关。  相似文献