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黄河口滨外区矿物分布特征及其控制因素探讨 总被引：1，自引：0，他引：1
In winter, 1983, forty surface sediment samples were collected from the area off the Huanghe River Estuary, Huanghe and Luanhe Rivers,and the rivers in Northwestern Shandong Peninsula. The sediments off the Huanghe River Estuary are composed of biotite, hornblende, epidote,actinolite, tremolite, garnet, zircon, sphene, diopside, magnetite, ilmenite, hematite, apatite, hypersthene, schorl, monazite, topaz, muscovite,leucoxene, rutile, zoisite, clinozoisite, vesuvianite, kynite, wollastoite,enstatite, bronzite, xenotime, anatase, pyrrhotine, glauconite, quartz,orthoclase, plagioclase, calcite and authigenic pyrite. On the basis of their mineral assemblages, the investigated area may be divided into three mineral provinces. Huanghe River, Luanhe River and Longkuo mineral provinces. The materials were derived from the Huanghe River, Luanhe Delta and Northwestern Shandong Coastal Region respectively. The sands from the Huanghe River are different from other sources, and are characterized by high contents of biotite, muscovite, plagioclase and calcite, and but low contents of pyroxene, epidote, Zircon, garnet and orthoclase. During the flood periods the materials from the Huanghe River fall into the Laichau Bay and are transported towards NE direction, which has been formed main outline of the distribution minerals in the sediment off the Huanghe River Estuary. However, Rmode cluster analysis shows that the sorting of the detrital minerals in this area is not strong. The data of the measurement current and nutrient salt in the water support the conclusions which are obtained from mineralogy study. 相似文献
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INTRODUCTIONTheHuanghaiSeaisrichwithfisheryspecies.Apartfromfishes,thereisagreatnumberofinvertebrates,ofwhichmanyareofcommercialimportance,playinganimportantroleintheHuanghaiSeafishery.Twogroupsofinvertebrates,CrustaceaandCephalopodawerelandedduringthetrawlsurveysintheHuanghaiSea.CrustaceaincludedPenaeusorientalis,Trachypenaeuscurvirostris,Crangonaffinis,Mitatynaeopsisdalei,Palaemongravieri,Portunustrituberculatus,Charybdisbimaculata,Oratosquillaoratoria,etc.andCephalopodainclucded… 相似文献
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Uplift Pressure of Waves on A Horizontal Plate 总被引：4，自引：0，他引：4
1 .IntroductionOwingtotheneedfordevelopingoffshoreresources,moreandmorehollow trussedstructuresareconstructed ,suchasalongshorequays ,islandquays,artificialislands ,bollards ,maritimeplatforms ,etc .Thelargeentitypartofthosemaritimestructuresusuallyconsistsofahorizontalplateabovethestillwaterlevel,anditusuallysuffersfromwaveattacksandthuscaneasilybedestroyed .Toavoidsuchakindofaccidents ,themostimportantistoaccuratelyevaluatetheupliftpressuresofwavesontheplateundervariouswaveconditionsandbound… 相似文献
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1 .IntroductionOffshoreplatformsarelargescalesteelorconcretestructures.Theyexperiencevariouskindsofdamagessuchasdents ,corrosionpits ,cracks ,deformation ,etc .,afteryearsofenvironmentalimpactofwinds ,waves ,currents ,soilreactions ,earthquakesandice (DuanandLiu ,1 995) .Thesafetyofthestructureshasalwaysbeenthemostimportantissueconcerned ,anditdependsontheassessmentoftheintegrityofthestructures,orspecificallyontheassessmentofthedamagesinthestructures .Riclesetal.( 1 994)experimentallyinvestig… 相似文献
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低云在不同季节对东海黑潮海洋锋响应的个例研究 总被引：2，自引：0，他引：2
《中国海洋大学学报(自然科学版)》2015,(10)
本文采用高分辨率的CALIPSO(Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations)卫星资料,结合欧洲中心的再分析资料,在东海黑潮区域分别选取冬、春、夏季的典型个例,对比分析层积云、层云、海雾3种边界层云。分析结果显示,层积云发生在高空槽后,云顶1.2~2.5km,云底0.7~2km,云顶平滑度差,海气界面不稳定,地表偏北风,边界层不稳定,底层混合均匀,云层上方有逆温层存在;层云发生在高空槽前,伴有强烈冷平流,位于地面低压前部,云顶高度300~700m,较平滑,云底不接地,海气界面稳定,地表南风,边界层稳定,有不接地逆温,云区无下沉运动;海雾发生在高空槽后,低层有暖平流,地面位于高压中心,雾顶小于700m,底部接地,雾顶最为平滑,海气界面稳定,地表南风,风速很小,边界层稳定,逆温层很低,并伴有强烈下沉运动,地表相对湿度大于90%。黑潮锋通过影响海气边界层,进而影响低云的高度、形态等特性,三种低云高度自南向北均逐渐下降,在SST大梯度区有突变,海雾与低云性质相似,在一定条件下可以相互转化。 相似文献
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《海洋学报(英文版)》2005,(6)
Number1Page 1 14 31 39 46 60 76 86 95 101 107 115 125 134 CurrentsintheLuzonStraitduringthespringof2002:observationandcomputationbymodified inversemodel YUANYaochu,LOURuyun,LIUYonggang,SUJilan,WANGKangshan,CHENHong CalculationofcirculationintheSouthChinaSeaduringsummerof2000bythemodifiedinverse method YUANYaochu,LIUYonggang,LIAOGuanghong,LOURuyun,SUJilan,WANGKangshan NumericalstudyonthesummercirculationoftheupperSouthChinaSeaanditsestablishment CAIShuqun,SUJilan,LON… 相似文献
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从样品制备、仪器操作参数最佳化、内标补偿等几方面着手,利用两个标准物质(GSPN-2,GSPN-3)发展了大洋多金属结核中27种元素的等离子体质谱(ICP-MS)测定方法.这27种元素包括Ba,Ce,Co,Cu,Dy,Er,Eu,Gd,Ho,La,Li,Lu,Mo,Nd,Pr,Sb,Sc,Sm,Tb,Th,Tm,U,V,W,Y,Yb和Zn.各元素测定值与保证值相当吻合.对GSPN-2和GSPN-3,Ba,Sb,Sc,Y,Zn等5种元素可用外标校准法准确测定,其平均回收率(n=3)在91.4%～106.9%之间;可用内标(103Rh)校准法准确测定其他22种元素,其平均回收率(n=3)在89.4%～110.2%之间;各元素3次测定的相对标准偏差(RSD)为0.0%～11.0%. 相似文献
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缢蛏微卫星序列分离及特性分析 总被引：4，自引：0，他引：4
分析了缢蛏(Sinonovacula constricta)基因组文库中微卫星序列的特性及微卫星引物的遗传特征.采用磁珠富集珐和PCR 筛选法,以CA15为探针,快速分离含有微卫星序列的阳性克隆.结果表明,在筛选的210个白色菌落中,得到58个微卫星序列,阳性克隆率为27.6%,核心重复序列为两碱基和三碱基的微卫星居多,其中完美型占39.7%,非完美型39.7%,复合型占10.3%,非完美型与复合型共存的占10.3%.微卫星重复次数主要集中在20～40次之间,占66%,最高为63次.除探针中使用的CA重复单元外,还观察到AG/TC,AT/TA,AAC/TTG,CAA/GTT,TGA,AAT,AGAA,GTTT/CAAA,AAAT/TTTA,TTTC,CCTA,TCTA,TCCC,TGCC,GTTTCT,CTGTT,CACACC,TATACA,TTTTG的重复序列.利用Primer Premier5.0设计引物24对,经过初步筛选得到适合的微卫星引物18对,为今后未知微卫星标记的开发,群体遗传结构的分析,优良品种的选育提供基础. 相似文献
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山本五十六是日本法西斯在第二次世界大战中的一名海军大将,他身材矮小,身高1.53米,体重不足50千克,娇小如女子,神情忧郁,文质彬彬,外表根本不像军人。但他性格内向,倔强刚健,不善客套,胆大心细,深谋远虑,多才多艺,好发奇想,创建了日本海军的航空兵部队、使日本海军一跃成为世界上一支 相似文献
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PROPOSALOFPROBLEMTheequatorialoceanicdynamicsintightconnectionwiththeEINinoeventshasbeenthefocusoftheoceanographer'sattention.Asabasisofequatorialoceanicdynamics,theconventionaltheoryoftheequatoriallytrappedwaves,whichwerefertothetrappedwavetheoryinextensiveliteratureuptodate(Matsuno,1966;Blandford,1966;MunkandMoors,1968;WunschandGill,1976;MoorsandPhilandet,1977;Eriksen,1985;Pedlosky,1987),hasbeenprogressivelydevelopedandemployed.However,thedetailedinvestigationsrevealthattheproper… 相似文献
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万安盆地位于我国南海西南端,印支半岛的东南海域,它是一个新生代走滑－拉张盆地,沉积了逾万米厚的地层,根据地震,钻井资料分析,把万安盆地新生代地层自上而下划分为第四系,广雅组,昆仑组,李准组,万安组及西卫群和人骏群,探讨了各组,群的时代属性和特征,认为它们分别对应于第四纪,上新世,晚中新世,中中新世,早中新世渐新世－晚始新世和早,中始新世,缺失古新世地层,同时认为西卫群和万安组是万安盆地的主力烃源岩 相似文献
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对1983年采集的样品进行Si, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn的含量测定表明,大部分元素在泥质沉积物中富集,在砂粒级沉积物中含量较低。元素含量区域分布的总趋势是调查区北部闽江口附近高,南部低。元素以陆源为主。本调查区南部中央的水深40—60m,该处水动力较强,元素含量均较低。Al, Ti, Fe, Mn, V元素含量之间存在一定的相关性,表明这些元素伴生共存。 相似文献
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青岛近海琼胶降解细菌的筛选和多样性分析 总被引：5，自引：0，他引：5
对青岛近海海水中琼胶降解细菌进行系统的分离,筛选得到87株海洋琼胶降解细菌。从中选出15株有代表性的菌株,克隆其16SrDNA序列,进行分子鉴定。结果表明,这些细菌主要分布在Cellulophaga,Cytophaga,Microbulbifer,Glaciecola,Pseudoalteromonas,Pseudomonas,Alteromonas和Agarivorans共8个属中。其中QM5,QM21,QM36鉴定为Cellulophaga lytica,QM15和QM28鉴定为Glaciecola mesophila,QM11,QM35,QM47,QM65分别鉴定为Cytophaga fuci-cola,Pseudoalteromonas atlantica,Pseudoalteromonas haloplanktis,Alteromonas addita。其余5株菌能够鉴定到属的水平。其中1株细菌QM42还不能确立分类地位。 相似文献