俄罗斯沿岸更新世盆地类型

俄罗斯沿岸地区受到分别属于大西洋、北冰洋和太平洋的14个海的海水冲刷，海岸线的总长度超过60000km。在更新世，这些盆地经历过不止一次的幅度不同的海平面的升降作用。在海退时期，广阔的陆架地区变干了，而在海侵时期，沿岸平原和低山岸区被海水淹没。在东北     

海上石油钻探,采油及其溢油事故的回顾

海上石油钻井平台乃是２０世纪末的技术奇迹，仅波斯湾，墨西哥湾，北海三个海域就有钻井平台１０００多座，目前钻探深度可达到１２ｋｍ，能够沉入海底或水中的钻井平台已经投入使用，８０年代海上石油，天然气的勘探和开采总投资已达７５００亿美元，海上石油开采总量已超过同期世界石油总开采量的１／３。重要的是海上石油开采比陆上石油开采更经济，可为人们提供更廉的石油，但是海上石油设施增多，钻井平台，油井等造成的石油泛     

青藏高原东部全新世冬夏季风变化的高分辨率泥炭记录

在建立了全新世泥炭沉积物高分辨率冬夏季风代用指标时间序列的基础上, 发现青藏高原若尔盖地区全新世冬夏季风的变化具有此消彼长和同时消长两种基本的模式, 冬季风与夏季风在不同时间尺度上两种模式又相互嵌套. 由冬夏季风指标叠加效应合成的气候状况却有与全球同步的规律性, 表现出千年-百年尺度的不稳定性, 6.2 ka的季风突然减弱事件要比8.0 ka的事件更显著, 反映了亚洲季风的区域特点或它本身就是全球气候的一个窗口.     

http://www.sciencedirect.com/science/article/pii/S1674987114000255

Geophysical studies point to a complex tectonic and geodynamic evolution of the Alboran Basin and Gulf of Cadiz.Tomographic images show strong seismic waves velocity contrasts in the upper mantle.The high velocity anomaly beneath the Alboran Sea recovered by a number of studies is now a well established feature.Several geodynamic reconstructions have been proposed also on the base of these images.We present and elaborate on results coming from a recent tomography study which concentrates on both the Alboran and the adjacent Atlantic region.These new results,while they confirm the existence of the fast anomaly below the Alboran region,also show interesting features of the lithosphere-asthenosphere system below the Atlantic.A high velocity body is imaged roughly below the Horseshoe Abyssal plain down to sub-lithospheric depths.This feature suggests either a possible initiation or relic subduction.Pronounced low velocity anomalies pervade the upper mantle below the Atlantic region and separate the lithospheres of the two regions.We also notice a strong change of the upper mantle velocity structure going from south to north across the Gorringe Bank.This variation in structure could be related to the different evolution in the opening of the central and northern Atlantic oceans.     

大功率低频可控震源在主动源地震学中的应用

过去的20年里,俄罗斯在主动源地震学中一直使用大功率(40吨和10吨)低频可控震源。这种震源可产生频带为1.5～3Hz,3～6Hz,5～10Hz,出力高达100吨的可控震源。该震源的可移动类型出力为40吨,频带宽度为6～12Hz。100吨级可控震源激发地震波的传播距离可达到350km,折射波向下可穿透达50km深度。震源运行过程具有高度可重复性,其产生的信号频谱有"夏季"与"冬季"两种不同模式。在长地震剖面上可以通过地震频谱的变化来估计断层带的埋深,其他的应用主要有深地震剖面、地震危险性区划、结构检测、各向异性导致的应力变化研究、地震事件定位、大型建筑的完整性检测。附录中给出了大功率低频可控震源的理论描述和数值实例。     

Mineralization of pegmatites in parts of the Oban Massif, Southeastern Nigeria： A preliminary analysis

The Oban Basement Massif of southeastern Nigeria is composed of metamorphosed rocks including phyllites, schists, gneisses and amphibolites cut by pegmatitic dykes of varying length and thickness, which intruded the metamorphic rocks. Preliminary geochemical study and analysis of these pegmatites from western Oban Massif at Uyanga, Akwa Ibami, Iwuru I, Iwuru Ⅱ and Igbofia showed that the pegmatites are highly albitized. This is incon-sistent with earlier postulations that the pegmatites in this part of Nige...     

The possible influences of the increasing anthropogenic emissions in India on tropospheric ozone and OH

A 3-D chemical transport model (OSLO CTM2) is used to investigate the influences of the increasing anthropogenic emission in India. The model is capable of reproducing the observational results of the INDOEX experiment and the measurements in summer over India well. The model results show that when NOx and CO emissions in India are doubled, ozone concentration increases, and global average OH decreases a little. Under the effects of the Indian summer monsoon, NOx and CO in India are efficiently transported into the middle and upper troposphere by the upward current and the convective activities so that the NOx, CO, and ozone in the middle and upper troposphere significantly increase with the increasing NOx and CO emissions. These increases extensively influence a part of Asia, Africa, and Europe, and persist from June to September.     

烟台海胆体内的纤毛虫和太平洋海胆体内纤毛虫的地理分布

1957年夏,中苏海洋动物综合考察队在黄海沿岸烟台地区工作时,参加考察队的阿·阿·斯特列科夫教授采集了海胆肠内的纤毛虫,并以此作为这篇文章的材料。在本文内将提出所见到的纤毛虫名称,并分析它们在太平洋地理分布的情况。