柴达木盆地西部第三系油田卤水资源可利用性分析   总被引：5，自引：11，他引：5       下载免费PDF全文

付建龙  于升松  李世金  任海燕 《盐湖研究》2005,13(3):17-21

通过对柴达木盆地油气钻孔资料的整理分析发现,对第三系地层中进行油气勘探时,经常伴有自井中喷出矿化度较高的卤水———油田水。通过对柴达木盆地构造演化分析,早期残留的古湖水经干旱蒸发条件,发生浓缩,将导致有用物质组分的富集;在此基础上,2002年对柴达木盆地西部第三系地层分布区的油井新取了水样,证实该卤水中含有较高的钾硼锂碘组分。通过盐田蒸发试验,可以得到质量较好的钾石盐、硼钾混盐、含锂碘的母液。  相似文献   

新显色剂5-Br-PAH与钴显色反应的研究     

李永忠  康文  陈焕文  李洪刚  张燮 《华东地质学院学报》2001,24(1):60-63

研究了新显色剂 5 Br PAH与钴 (Ⅱ )的最佳显色反应条件。在pH为 10 .0的条件下 ,Co(Ⅱ )与 5 Br PAH形成稳定的蓝紫色络合物 ,络合比为 1∶1,最大吸收波长为 6 86nm ,最大摩尔吸光系数达 1.6 6× 10 4L·mol- 1 ·cm- 1 。钴量在 0～ 2 0 μg/2 5mL范围内遵守比尔定律。该体系显色速度快 ,稳定性好 ,并有较好的选择性 ,样品分析结果令人满意。  相似文献   

安徽省矿山地质灾害综述   总被引：2，自引：0，他引：2  

宁丰平 《上海国土资源》2001,(4):45-48

该文在分类的基础上主要对安徽省几种主要的矿山地质灾害的分布、规模、特点进行一般性的介绍，其中，对几处规模及灾害程度都较大的灾害个案如铜陵小街地区的岩溶塌陷等进行较为详细的叙述，并加简要的分析，并依此提出（1）建立矿山地质环境与灾害监测体系；（2）尽快立项调查，划定矿山地质灾害易发区和危险区的建议。  相似文献   

Identification of Anomalous Aluminium Contents in Surface and Ground Water in the Alba Territory (NW Italy)     

Massimo Civita  Adriano Fiorucci  Roberta Miè 《Geostandards and Geoanalytical Research》2001,25(2-3):431-439

Aluminium was determined in surface and ground waters in the Alba region of NW Italy to provide information on natural and anthropogenic sources of contamination. Determinations were made by a spectrophotometric method based on the aluminium-pyrocatechol complex. The total aluminium content of waters was determined as well as the toxic form of monomeric aluminium, obtained from samples that had been passed through 0.20 μm cellulose filters to remove colloidal and particulate material. Results were correlated with mortality data associated with Alzheimer's disease. There appeared to be a correlation between mortality data and areas having the highest aluminium content of water.  相似文献   

Boron K-edge XANES of boron oxides: tetrahedral B–O distances and near-surface alteration     

M. E. Fleet  X. Liu 《Physics and Chemistry of Minerals》2001,28(6):421-427

Synchrotron radiation boron K-edge XANES spectra collected in fluorescence yield mode are reported for monoclinic metaboric acid [HBO₂(II)], sinhalite (MgAlBO₄), and a selection of boron oxides in which B is exclusively in trigonal coordination (^[3]B). The anomalously high divergence of tetrahedral (^[4]B–O) bond lengths in HBO₂(II) and sinhalite is used to resolve fine structure at the ^[4]B K edge due to splitting of σ*(t₂) antibonding orbitals. For HBO₂(II), XANES peaks at 196.9 and 199.3?eV are assigned to ^[4]B–O distances of 1.564 and ～1.440 (×3) Å, respectively, and, for sinhalite, peaks at 196.8, 197.9, and 199.6?eV are assigned to distances of 1.586, 1.483 (×2), and 1.442?Å, respectively. A correlation between peak splitting at the ^[4]B K edge and divergence of tetrahedral bond length is established for borates and borosilicates using data for sinhalite, HBO₂(II), ferroaxinite, danburite, datolite, and BPO₄. B K-edge XANES spectra collected in total electron yield mode, which probes to <60?Å, show that almost all ^[4]B in HBO₂(II) and about one-third of the ^[4]B in sinhalite are converted to ^[3]B in the near-surface structure. Moreover, HBO₂(II), HBO₂(III), sassolite (boric acid; H₃BO₃), and v-B₂O₃, which have markedly different bulk structures, have a similar near-surface layer composed of a relaxed anhydrous network of BO₃ groups.  相似文献   

CASE STUDIES OF THREE-DIMENSIONAL NUMERICAL SIMULATION FOR TOTAL SEDIMENT TRANSPORT     

Hongwei FANG 《国际泥沙研究》2003,18(2)

1 INTRODUCTION With advances in computer technology and numerical methods, three-dimensional (3D) mathematical models for sediment transport are gradually applied more often and for more practical projects of hydraulic engineering. Three-dimensional mathematical river models can describe not only the secondary flow, but also the transport, deposition, and erosion of sediment in the river channel and the flood plain. However, at present the theories of sediment transport are not as well de…  相似文献   

一种基于UML的集中式监控系统     

王海彬  傅德胜 《南京气象学院学报》2003,26(3):414-418

主要阐述如何利用UML(Unified Modeling Language)建模过程描述集中监控系统。文中给出了监控系统的结构、功能和运用UML技术描述系统的方法和实现过程，并列出了描述实例。  相似文献   

遗传算法在边坡地震稳定性分析中的应用   总被引：1，自引：0，他引：1  

周圆π  李守巨  刘迎曦  何翔 《岩土力学》2003,(Z2)

基于遗传算法和拟静力简化毕肖普法提出搜索地震作用下最危险滑动面及相应的最小安全系数的方法。阐述了应用遗传算法搜索最危险滑动面的计算过程和原理。开发了基于遗传算法的拟静力简化毕肖普数值法的计算和数据处理程序。在固定一个出逸点的情况下,分别绘制了有地震作用及没有地震作用下的安全系数分布图。数值算例表明,所建立的基于遗传算法的岩土边坡地震稳定性分析方法,是一种全局优化搜索算法,能够有效克服经典搜索方法易陷入局部极小值的缺点。从安全系数分布图可以看出,地震对安全系数分布情况影响很小,但扩大了安全系数低值区。  相似文献   

二类水体水色遥感的主要进展与发展前景   总被引：18，自引：3，他引：18  

任敬萍  赵进平 《地球科学进展》2002,17(3):363-371

Ⅱ类水体水色遥感是海洋水色遥感的难点和热点。针对Ⅱ类水体的光谱特性和海洋现象的特点，综述了水色卫星传感器在光谱波段配置、辐射探测性能和时空分辨率等方面的设计要求与技术进步。从水色遥感资料反演的两大关键技术——大气校正和生物光学算法两个方面，概述了Ⅱ类水体水色反演算法的研究现状和发展方向。根据我国近海的水体特点，提出了我国水色遥感研究需要解决的关键问题。  相似文献   

Defining phases of bedload transport using piecewise regression     

Sandra E. Ryan  Laurie S. Porth  C. A. Troendle 《地球表面变化过程与地形》2002,27(9):971-990

Differences in the transport rate and size of bedload exist for varying levels of flow in coarse‐grained channels. For gravel‐bed rivers, at least two phases of bedload transport, with notably differing qualities, have been described in the literature. Phase I consists primarily of sand and small gravel moving at relatively low rates over a stable channel surface. Transport rates during Phase II are considerably greater than Phase I and more coarse grains are moved, including material from both the channel surface and subsurface. Transition from Phase I to Phase II indicates initiation and transport of grains comprising the coarse surface layer common in steep mountain channels. While the existence of different phases of transport is generally acknowledged, the threshold between them is often poorly defined. We present the results of the application of a piecewise regression analysis to data on bedload transport collected at 12 gravel‐bed channels in Colorado and Wyoming, USA. The piecewise regression recognizes the existence of different linear relationships over different ranges of discharge. The inflection, where the fitted functions intersect, is interpreted as the point of transition from Phase I to Phase II transport; this is termed breakpoint. A comparison of grain sizes moved during the two phases shows that coarse gravel is rarely trapped in the samplers during Phase I transport, indicating negligible movement of grains in this size range. Gravel larger than about D₁₆ of the channel surface is more consistently trapped during Phase II transport. The persistence of coarse gravel in bedload samples provides good evidence that conditions suitable for coarse grain transport have been reached, even though the size of the sediment approaches the size limits of the sampler (76 mm in all cases). A relative breakpoint (R_br) was defined by the ratio between the discharge at the breakpoint and the 1·5‐year flow (a surrogate for bankfull discharge) expressed as a percentage. The median value of R_br was about 80 percent, suggesting that Phase II begins at about 80 percent of the bankfull discharge, though the observed values of R_br ranged from about 60 to 100 percent. Variation in this value appears to be independent of drainage area, median grain size, sorting of bed materials, and channel gradient, at least for the range of parameters measured in 12 gravel‐bed channels. Published in 2002 by John Wiley & Sons, Ltd.  相似文献