长山群岛和辽东半岛南部的海岸阶地及新构造运动特征

为了排除水动型海平面升降影响,本文根据1981—1987年所获得的资料,应用大海岸阶地综合纵剖面分析法,讨论了长山群岛和辽东半岛南部海岸阶地及其所反映的新构造运动性质。结果表明:第四纪期间,研究区经历了强烈的整体性断块上升运动,区内未发现明显的隆起、凹陷或断层的垂直错动,而是显示了由东南向西北轻微掀斜式的继承性整体构造上升特点。此外,依据第四纪、近代和现代的构造上升速率,认为本区仍保持着新构造上升的总趋势,地震危险程度不大。     

挪威斯瓦尔巴群岛西部天然气水合物高分辨地震研究

在斯瓦尔巴群岛西部的高分辨率地震剖面上可识别出强似海底反射（BSR）（振幅变化大）。据高频海底水听器（HF－OBH）资料计算，在BSR之上速度达1840m/s，暗示沉积物含气体水合物；BSR之下出现低速层，认为含气沉积物所致，厚度12－25m。另外，在经典的水合物稳定带（HSZ）之内。可识别出含游离气的两个低速层，而理论上这里不存在游离气。     

长山群岛海区表层沉积物特征与物源分析

本文以现场调查的粒度、粘土矿物资料为基础，结合区域水动力条件，系统分析了长山群岛海区的表层沉积物类型和特征，探讨了沉积环境和物质来源。     

宫古群岛外陆架和陆坡上受潮流影响的高能环境和与红藻石有关的碳酸盐沉积

宫古群岛外陆架和陆坡上受潮流影响的高能环境和与红藻石有关的碳酸盐沉积ＹｏｓｈｉｈｉｒｏＴｓｕｊｉ宫古群岛位于日本琉球岛弧南部。沉积在开阔陆架和水深９００ｍ陆坡上的沉积物泥质含量低（＜５％），而沉积在潮流受阻水深２０ｍ的浅部陆架区的沉积物泥质含量高（＞...     

Crustal thickening in an active margin setting （Philippines）： The whys and the hows

A synthesis of crustal thickness estimates was made recently utilizing available field, geochemical, seismicity, shear wave velocity and gravity data in the Philippines. The results show that a significant portion of the Philippine archipelago is generally characterized by crust with a thickness of around 25 to 30 kilometers. However, two zones, which are made up of a thicker crust (from 30 to 65 km) have also been delineated. The Luzon Central Cordillera region is characterized by thick crust. Another belt of thickened crust is observed in the Bicol-Negros-Panay-Central Mindanao region. This paper examines the interplay of tectonic and magmatic processes and their role in modifying Philippine arc crust. The processes, which could account for the observed crustal thicknesses, are presented. The contributions of magmatic arcs as compared to the contribution of the emplacement and accretion of ophiolite complexes to crustal thickness are also discussed.     

Neoproterozoic basin evolution in Fennoscandia, East Greenland and Svalbard

Neoproterozoic successions of Fennoscandia, East Greenland and Svalbard are related to crustal extension and formation of sedimentary basins along the margins of northern Baltica （ Fennoscandia ） and eastern Laurentia （East Greenland and Svalbard）, preceding final break-up of Rodinia. The early rift stage （late Tonian-Cryogenian） is characterized by up to 16 km thick sedimentary successions of deep-marine sandstones and conglomerates linked to rift and strike-slip basins. Pericratonic basins expanded during Cryogenian-Cambrian coastal onlap. Cryogenian tropical climate is reflected by carbonate and evaporitic formations, most of which predate Cryogenian-Ediacaran glaciations. Glacial units, collectively referred to the Varanger Ice Age, may be equivalent to the Marinoan （c. 630 Ma） and the Gaskiers （c. 580 Ma） glacial periods. The final stage in break-up of Rodinia commenced with the emplacement of dolerite dyke swarms along the Baltoscandian margin at c. 600 Ma and the opening of the lapetus Ocean and other sea ways. No such dyke swarms have been recorded along the East Greenland segment of the Laurentian margin. Several Tonian-Cambrian tectonic and magmatic events recorded within the Kalak Nappe Complex in northern Finnmark make this unit an exotic terrane relative to the autochthonous Baltoscandian platform.     

东加勒比群岛的概率地震危险性评估

完成了北边包括背凤群岛（从安圭拉到多米尼加）和南边包括向风群岛（从马提尼克到格林纳达）、巴巴多斯、特立尼达和多巴哥的东加勒比地区（10°N～19°N,59°w～64°w）的地震危险性概率分析,计算了概率地震危险性图。该分析是用能够系统考虑基于模型（即,认识的）不确定性及其对计算地震动参数影响的标准逻辑树方法进行的。我们使用0．025。空间分辨率的场点网格对研究岛屿的区域完成了地震危险性计算。采用了两种不同的计算方法：基于适当潜在发震区（SZ）定义的标准Cornell—McGuire方法（Cornell,1968;McGuire,1976）和由WOO（1996）提出的克服了与震源定义有关的模糊的区域自由方法。我们认真仔细地研究了加勒比地区的浅地壳、板内和界面俯冲地震活动之间的相互作用和复杂性。通过合并所有可用的数据库,为这个地区编辑了一个更新综合目录。而且为确定在分析中使用最适宜的地震动预测方程也进行了认真仔细的调查研究。计算了4个重现期（RP）（95年、475年、975年和2475年）的地震动水平分量的统一危险谱和结构周期从0s到3s的22个谱加速度（SA）值。计算出2475年重现期0．2s和1．0s的谱加速度值后可以根据国际建筑规范确定研究区域的地震危险性（IBC,International Code Council[ICC],2009）。     

黄岩岛本无事

2012年4月8日,12艘中国渔船若往常般在南海中沙群岛的黄岩岛附近捕鱼作业。菲律宾的巡逻飞机有点"看不过去",遂出动了该国最大的军舰"德尔皮拉尔"号,将中国渔船非法堵在黄岩岛!湖内,并试图抓扣在黄岩岛附近作业的中国渔民。菲海军士兵登上中国渔船检查,并声称在一艘船上查获了"非法"捕捞的水产品。如果中国渔船逾越了中国国境并且进入了菲律宾国境内,毫无疑问,菲律宾的上述行为无可争辩。但事实恰恰相反,中国渔船一直在中国境内作业,而黄岩岛则是中国     

The adaptation of Arctic phytoplankton to low light and salinity in Kongsfjorden （Spitsbergen）

The basic environmental variables and adaptability ofphytoplankton communities to low light and salinity were stud- ied using incubation experiments in Kongsfjorden, a high Arctic fjord of Spitsbergen, in late summer 2006. Chlorophyll a concentrations were steady or decreased slightly in darkness after one day or one week incubation. Chlorophyll a concentrations showed an initial decline when exposed to natural light after one week incubation in darkness, and then increased significantly. In a salinity experiment, the maximal growth rate was observed at a dilution ratio of 10%, however, higher dilution ratios （≥0%） had an obvious negative effect on phytoplankton growth. We suggest that the phytoplankton communities in fjords in late summer are dark- ness adapted, and the inflow of glacial melt water is favorable for phytoplankton growth in the outer fiords where the influence of freshwater is limited.