A SULPHIDES-BEARING TERIDOTTTE FROM SZECHUAN

A. GENERAL DESCRIPTION This peridotite is collected from Ching Kuang Shan (青矿山), Hui Li Hsien (会理县), Szechuan Province Its colour is greenish black The texture is medium coarse grained. The cleavage surfaces of the amphibole     

GEOLOGY OF THE GORGE DISTRICT OF THE YANGTZE (FROM ICHANG TO TZEKUEI) WITH SPECIAL REFERENCE TO THE DEVELOPMENT OF THE GORGES.

As the Gorge District of the Yangtze is one of the few areas in China that can deservedly boast before the world its scenic grandeur as well as beauty, it has been long felt that a systematic account of its geological conditions would open another aspect of interest to the scientific travellers. There are already on the record the observations of Pumpelly, Richthofen, Abendanon, Willis and Blackwelder, Noda and others; but the results of their work, important as they are in certain respects, seem to ind...     

Study of Bed Friction Factor for the Wu River Estuary

1 .IntroductionThe Wu River systemis the most important estuary river in central Taiwan.Its tidal wave canrange over 5 meters .Itis considered as one of the most magnificent scenesin Taiwan.The understand-ing of the tidal flowof the estuaryis essential to…     

南海西南次海盆广角地震探测

2010年12月—2011年3月在南海西南次海盆开展了海底地震仪(Ocean Bottom Seismometer,OBS)探测,采用Sedis IV型、I-4C型和MicrOBS3种不同型号的OBS,以4×24.5L的大容量气枪为震源,获得了覆盖西南次海盆残留扩张脊的3D人工地震数据。从处理的地震数据可知,此次试验是一次比较成功的地震实验,OBS地震记录清晰、震相丰富,所使用的气枪有足够的能量输出,显示了其良好的工作能力。选取剖面1中的7台OBS进行了2D剖面处理。初步建模结果表明,南海西南次海盆地壳结构为普通洋壳,海山顶部沉积层很薄,莫霍面埋深较浅。     

光降解-过硫酸钾方法分析水中溶解有机磷

对紫外(UV)光降解-过硫酸钾方法分析溶解有机磷的条件进行比较分析,在UV/加热条件下溶解有机磷的氧化率最高.进一步考察氧化剂的酸碱性和浓度对溶解有机磷氧化率的影响.Cl-和海水介质可以使溶解有机磷的氧化率显著降低.可以通过改变UV灯的功率、反应时间、反应温度、氧化剂等条件提高溶解有机磷的氧化率.     

Characterization and significance of shocked quartz from the Woodleigh mpact structure,Western Australia

Abstract— We re‐examined the buried Woodleigh structure in Western Australia, which has been inferred to be a multi‐ringed, 120 km diameter impact crater, because the proposed size and possible synchronicity with one of the pre‐Mesozoic mass extinction events has attracted controversy. We undertook a detailed study of the petrology and mineralogy of a number of samples of core from the Woodleigh‐1 borehole that was drilled into the central uplift of the structure. Crystalline Proterozoic basement rocks comprising granites and gneisses in the Woodleigh‐1 core contain minor brecciation in discrete veins and reveal clear evidence of shock metamorphism over the full extent of the core. Imaging of laboratory‐etched quartz showed that a large number of grains contain shock deformation lamellae. Microstructural and crystallographic analysis of these lamellae by TEM showed that they are planar deformation features (PDFs) that have subsequently undergone annealing and water assisted recrystallization. The available geological, petrographic, and mineralogical evidence suggest that Woodleigh is an eroded impact crater that is nearer to 60 km than 120 km in diameter. Future drilling projects should better constrain the level of erosion, and may reveal any preserved impact lithologies.     

Characteristics and Nonlinear Growth of the Singular Vector Related to a Heavy Rainfall Case over the Korean Peninsula

In this study,singular vectors related to a heavy rainfall case over the Korean Peninsula were calculated using the fifth-generation Pennsylvania State University-National Center for Atmospheric Research Mesoscale Model (MM5) adjoint modeling system.Tangent linear and adjoint models include moist physical processes,and a moist basic state and a moist total energy norm were used for the singular-vector calculations.The characteristics and nonlinear growth of the first singular vector were analyzed,focusing on the relationship between the basic state and the singular vector.The horizontal distribution of the initial singular vector was closely related to the baroclinicity index and the moisture availability of the basic state.The temperature-component energy at a lower level was dominant at the initial time,and the kinetic energy at upper levels became dominant at the final time in the energy profile of the singular vector.The nonlinear growth of the singular vector appropriately reflects the temporal variations in the basic state.The moisture-component energy at lower levels was dominant at earlier times,indicating continuous moisture transport in the basic state.There were a large amount of precipitation and corresponding latent heat release after that period because the continuous moisture transport created favorable conditions for both convective and nonconvective precipitation.The vertical propagation of the singular-vector energy was caused by precipitation and the corresponding latent heating in the basic state.     

土工织物加筋黏性土坡坡顶加载的离心模型试验研究

土工织物加筋技术在工程中得到了广泛的应用,取得了良好的加固效果。但对于土工织物加筋机制尚缺乏明确和统一地认识,加筋理论研究落后于工程实践。为此,进行了坡顶加载条件下土工织物加固黏性土坡和素土边坡的离心模型试验,记录和再现了素土边坡和加筋土坡在坡顶加载条件下的变形破坏过程。主要基于变形分析探讨了黏性土坡在土工织物简单加固条件下的加固效果和加筋机制。结果表明,土工织物加筋可以有效地提高黏性土坡的极限承载力,加筋带的存在改变了土体的位移场,扩大了坡顶加载的影响区域,加筋后滑裂面明显后移。加筋带对土体的局部作用和作用范围,随着土体变形的增大而增大和扩展     

地球表面的主要断裂带

地球上满布着大大小小、各式各样的断裂,其中一部分,断到了地壳深处乃至地肉(Mantle)中,这类断裂通常被称为深断裂或主要断裂。关于这类断裂的研究,早在本世纪初,W.H.霍布斯就已推想到某些地形特征可能与地壳裂缝有关。R.A.松德尔着重研究了线形构造(Lineament),强调了北东—南西向和北西—南东向线形构造的重要性,并认为沿它们进行的平移剪切运动(Rhegmagertese)是地壳的主导运动之一。深断裂这一术语是A.B.裴伟首先提出来的,在1956午,他又发表了两篇有关深断裂的总结性论文。 F.A.维宁.迈勒慈研究了星球性剪切网络及它与极位移、壳下对流的关系。     

浮游生物来源溶解有机物的三维荧光特征研究

应用三维激发-发射荧光光谱技术,研究了中肋骨条藻和采集水样中浮游植物在光照和避光条件下培养实验过程中产生的溶解有机物,分析了三维荧光光谱中荧光峰数目、位置和荧光强度的变化,探讨了浮游植物和细菌在有机物产生中的作用.结果表明,光照条件下浮游植物生长产生类蛋白和类腐殖质荧光有机物,在衰亡期2类有机物的荧光强度迅速增加;而在避光条件下,类蛋白有机物荧光强度明显降低,类腐殖质有机物的荧光强度保持不变.2类有机物的荧光峰位置和荧光强度变化与初始有机物的性质及光照环境有关.