吉尔伯特群岛海域大眼金枪鱼(Thunnus obesus) 栖息环境综合指数

根据2010年10月—2011年1月在吉尔伯特群岛海域利用金枪鱼延绳钓调查所取得的32个站点的大眼金枪鱼渔获数据,以及测得的温度、盐度、叶绿素、溶解氧浓度、水平海流及垂直海流数据,采用分位数回归的方法研究了各水层(80—240m,每40m为一层)中各环境因子与大眼金枪鱼渔获率的关系,建立"栖息环境综合指数(integrated habitat index,IHI)模型",并利用另外8个站点的数据验证研究结果。结果表明,(1)IHI模型的预测能力较好;(2)不同的水层影响大眼金枪鱼分布的环境因子不同,在较浅的水层(80—200m),大眼金枪鱼的渔获率与溶解氧浓度和海流相关,而在较深水层(>200m)则仅与温度相关;(3)大眼金枪鱼较适宜的栖息水层为120—160m;(4)大眼金枪鱼IHI指数分布较高的两个海域分别为2—3°S,169—175°E与1—3°S,178—180°E,建议在上述两个海域作业时,尽可能使钓具沉降到120—160m的水层,以达到减少兼捕渔获物,同时提高生产效率。     

深海——海下声呐探索深海珊瑚礁

2006年5月22日到30日，美国港口海洋学研究所和迈阿密大学的科学家将使用“约翰逊海洋链接二号深潜器”首次探测佛罗里达州和巴哈马群岛之间新近发现的深海珊瑚礁。这些珊瑚礁生长在水下610米至884米处，是去年12月被迈阿密大学科学小组使用尖端声呐技术发现的。这次探测的主要目的是寻找含有某些化学元素的海洋有机物，科学家期望这些化学成分能够治愈癌症和阿尔茨海默病等疾病。     

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.