黄骅虾池中叶绿素a浓度及其与赤潮的关系

本文通过１９９０～１９９２年对黄骅沿海虾池中叶绿素ａ含量的监测及其变化的研究，反映了３ａ来虾池中叶绿素ａ含量的变化及其特征，揭示了叶绿素ａ含量与赤潮的关系。本文提出了虾池中使用叶绿素ａ富营养化阈值含量对研究我国沿海虾池赤潮具有重要的参考价值。     

斑头鱼Agrammus agrammus(Temminck et Schlegel)和铠平鱼由Sebastes hubbsi(Matsubara)核型研究

采用ＰＨＡ、秋水仙素活体注射，取肾细胞空气干燥法制片，研究斑头鱼（）和铠平鱼由（♀）的核型。其核型分别为２ｎ＝４８，７ｍ＋３３ｓｍ＋８ｓｔ，ＮＦ＝８８和２ｎ＝４８，３ｍ＋２ｓｔ＋４３ｔ，ＮＦ＝５１。并且这两种鱼的核型中均有１条具次缢痕的染色体，因此形成异形染色体对。这是黄渤海鱼类染色体研究首次发现     

http://www.sciencedirect.com/science/article/pii/S1674987110000319

The 3-D geometry of the seismicity in Hindu Kush–Pamir–western China region has been defined by seismic records for 1975–1999 from the National Earthquake Information Center, the U.S. Geological Survey, and over 16,000 relocated earthquakes since 1975 recorded by the Xinjiang seismic network of China. The results show that most Ms ≥ 5.0 hypocenters in the area are confined to a major intracontinental seismic shear zone (MSSZ). The MSSZ, which dips southwards in Pamir has a north-dipping counterpart in the Hindu Kush to the west; the two tectonic realms are separated by the sinistral Chaman transform fault of the India–Asia collisional zone. We demonstrate that the MSSZ constitutes the upper boundary of a south-dipping, actively subducting Pamir continental plate. Three seismic concentrations are recognized just above the Pamir MSSZ at depths between 45–65 km, 95–120 km, and 180–220 km, suggesting different structural relationships where each occurs. Results from focal mechanism solutions in all three seismological concentrations show orientations of the principal maximum stress to be nearly horizontal in an NNW–SSE direction. The south-dipping Pamir subduction slab is wedge-shaped with a wide upper top and a narrow deeper bottom; the slab has a gentle angle of dip in the upper part and steeper dips in the lower part below an elbow depth of ca. 80–120 km. Most of the deformation related to the earthquakes occurs within the hanging wall of the subducting Pamir slab. Published geologic data and repeated GPS measurements in the Pamir document a broad supra-subduction, upper crustal zone of evolving antithetic (i.e. north-dipping) back-thrusts that contribute to north-south crustal shortening and are responsible for exhumation of some ultrahigh-pressure rocks formed during earlier Tethyan plate convergence. An alternating occurrence in activity of Pamir and Chaman seismic zones indicates that there is interaction between strike-slip movement of the Chaman transform fault system and deep-subduction of the Pamir earthquake zone. Pamir subduction-related seismicity becomes shallower in depth with increasing distance east of the transform fault. Therefore, sinistral movement of the Chaman transform fault appears to be influencing continental deep-subduction in the Pamir region and may provide an explanation for the unusual south-dipping geometry of the intracontinental Pamir plate.     

模糊综合评判在临沂城区岩溶塌陷危险性评价中的应用

岩溶塌陷是山东省临沂市区最重要的地质灾害类型,该文首次采用基于层次分析的模糊综合评判法对岩溶塌陷进行了危险性现状评价,综合得出了危险性评价分级图,为当地岩溶塌陷防治工作提供了基础数据,也为同类地质灾害预防提供了借鉴模式。     

基于场强模型的南沙岛礁战略地位评价

南沙岛礁及附近海域蕴含丰富的资源,是中国海洋权益的重要组成部分。在南海主权争端日益激烈的形式下,根据岛礁自然特征和所处空间的资源条件,对南沙诸岛进行战略地位评价,有利于量化各岛礁价值,有重点地维护中国海洋权益。研究选取131 座符合评价条件的南沙岛礁,结合其自然属性以及南海空间的资源、航道等因素,使用场强模型,量化其在空间中的主权法律意义、军事价值和资源条件,获得了各岛礁的战略地位得分,可为研判南海局势提供参考。评价结果表明：部分具有显著战略地位和区域重要意义的南沙岛礁至今无人驻守,需重点关注;人工建设可明显提升岛礁的战略地位;在现有格局下,加大岛礁建设力度有助于维护中国南海的海洋权益。     

黄土古气候变化趋势与青藏高原隆升关系初探

粒度和磁化率是两个研究黄土古气候最常用的古环境变化指示参数,它们随着黄土古土壤地层变化而出现峰和谷的对应已经被证明是反映了天文轨道要素的周期变化。文章试图忽略这些受控于轨道要素的气候周期变化,而主要侧重考察黄土地层这两个参数的平均值(或背景值)所反映的长期变化趋势。对兰州九州台黄土进行了系统采样和测量,发现兰州九州台黄土剖面粒度和磁化率曲线显示出两个明显的趋势,粒度从剖面底部向上有明显逐渐变粗趋势,指示着冬季风增强,与此同时,磁化率自下而上却逐渐增大,指示着夏季风增强的趋势。与黄土高原其他黄土剖面磁化率和粒度曲线对比发现,这是两个普遍存在的趋势。地理位置靠近青藏高原的剖面,这两个增大的趋势更明显。冬、夏季风同时逐渐增强是海陆热力差异增大所引起,反映了青藏高原第四纪时期的逐渐不断的隆升过程。因此,根据粒度和磁化率曲线变化趋势线的变化特点可以帮助分析和反推第四纪以来青藏高原隆升的过程。兰州九州台以及黄土高原各剖面粒度和磁化率曲线的线性变化趋势则可能指示着第四纪以来青藏高原是逐渐均匀缓慢的变化过程。我们对22Ma以来风积地层记录的变化趋势也做了分析。前人过去普遍认识的第四纪以来跳跃式或间歇式剧烈隆升在我们的数据中没有得到反映。黄土高原西部西宁、兰州、靖远等剖面磁化率显著的增长趋势可能与青藏高原隆升到一定高度后高原季风加强所致。     

新疆乌恰县吾合沙鲁地区水系沉积物地球化学特征与找矿远景

新疆乌恰县吾合沙鲁地区位于塔里木盆地西缘,该区及周边已发现金属矿床(点)20余处,具有良好的铜、铅、锌矿找矿前景。通过1∶5万水系沉积物的地球化学测量,对吾合沙鲁地区Cu、Pb、Zn、Ag等15种元素的地球化学特征进行了初步分析,综合元素分异程度、富集程度、叠加强度,发现Cu、Pb、Zn、Ag、Sb、Sn、Sr、W在研究区内有富集成矿的可能,是研究区主要成矿元素。根据异常特征与成矿地质条件,共圈出15处地球化学综合异常,优选出3处找矿远景区,即吾合沙鲁铜、银、铅、锶多金属找矿远景区、硝尔布拉克套铜多金属找矿远景区和阿克套铜、锶多金属找矿远景区,为下一步找矿工作指明了方向。     

Silurian Seismites in Hanxia, Yumen, North Qilian Mountains, and Their Tectonic Significance

The Caledonian erogenic belt of the North Qilian Mountains is an intensely active structure belt. In the process of the Late Caledonian syn-orogeny, the North Qilian-Hexi Corridor area was situated on the tectonic background of a syn-orogenic basin. In response to the orogenic process of the North Qilian Mountains, typical earthquake event deposits-seismites of the Silurian were widely distributed around Hanxia of Yumen City, the Liyuan River of Sunan County and Biandukou of Minle County. In the Hanxia area, where seismites are typically developed, clastic deposits of tidal-flat facies are the background deposits of the Hanxia Formation. The earthquake event deposits are characterized by sandy mudstone veins, synsedimentary microfractures, micro-corrugated laminations and earthquake breccias, which in turn constitute complex seismites, featuring seismic corrugation, shattering and liquefied sandy mudstone veins, auto-clastic breccias and intraclastic parabreccias. The seismites and tidal flat deposits f     

西昆仑—西南天山地区断裂活动性研究

利用多时相、多波段卫星图像，对西昆仑-西南天山地区大约500000km^2范围的断裂活动性进行分析判读。根据卫星图像上显示的地貌、微地貌特征，构造组合形态，将所判读的断裂分为全新世活动、晚更新世活动以及活动不明显的3类，结合地震活动性，对该地区强震危险性进行了分析，提出西昆仑布伦口组合构造带活动，可能是形成20世纪南天山前缘乌恰、阿图什、伽师一系列强烈地震的原因。     

Aeolian Facies Belts in the Taklimakan Desert

At least at the beginning of the last glacial epoch, the facies belts of dune sand, sandy loam and loess formed by winds had existed in the Taklimakan desert and areas south of it. There were no appreciable changes in the NE and NW wind systems and their wind fqrces that deposited dune sand, sandy loam and loess in the global cold stage since the last glacial epoch (accordingly no marked shifts of the boundaries of these aeolian facies belts took place. In the global warm stage since then, the climate in the Taklimakan desert and areas south of it became warm and dry, resulting in ablation of substantial volumes of ice and snow in their surrounding mountains and thus forming alluvial and diluvial deposits in the region. The alluvial-diluvial actions, however, failed to change the general framework of aeolian facies belts.