不同类型岩土对六价铬的抗污染性分析     

高宗军  高洪阁  李白英  张路明 《中国地质灾害与防治学报》2003,14(4):108-111

对已经受铬污染的、未受铬污染的以及受造纸厂废水污染的不同岩土样，分别用蒸馏水和铬污染水作为淋液进行淋滤试验。受铬污染的岩土会发生二次溶解，导致淋滤液受Cr^6 污染。受造纸废液污染的土样对污染水中的Cr^6 具有较强的吸附截留作用，其去除Cr^6 效果远优于一般岩土，即对Cr^6 的抗污染性较好。  相似文献   

大炮检距优化6次NMO校正   总被引：1，自引：0，他引：1  

张栋  杜清怀  许孝坤 《西北地质》2004,37(4):117-120

常规2次NMO动校是假定炮检距与深度比值小，并且射线为直线。计算的旅行时精度随着炮检距与深度比值的增加而大大降低，NMO校正能通过高次(4次、6次)项逼近得到改善。因此，在大炮检距情况下，若直接忽略高次项，则计算旅行时会产生很大误差。所以在大炮检距条件下进行2次NMO近似不利于速度分析、AVO研究和CMP道集动校叠加。笔者引入了一个更精确的旅行时近似计算，称为优化6次NMO动校方程式，因为截断误差较小，故其精确度高于泰勒6次展开式。通过模型和实际数据的试验，证明大炮检距优化6次NMO方程精度高，更具有实际应用意义。  相似文献   

Photoshop 6在翡翠雕件成像中的应用     

蒋琪 《云南地质》2004,23(1):113-119

Photoshop软件具有较强的图像编辑能力，而且仍在不断升级。笔者尝试使用该软件中诸如色阶、直方图、曲线等工具，把从数码相机中摄取的图像信息，经过对比度、色调、色彩等校正，打印出能真实反映翡翠雕件的相片，实际运用中效果较佳。  相似文献   

1996年南黄海6.1级地震构造背景及异常特征     

郭爱香  刁守中  马玉香  王红卫  冯志军 《高原地震》1998,(1)

利用黄海与东海海底地貌、海底活动构造研究成果,对1996年11月9日南黄海6．1级地震地质构造背景做了初步分析。根据震前对南黄海地区的震情追踪表明,这次地震前震中100～200km范围内无明显的测震学异常现象,而异常主要分布于南黄海中、北部地区,认为南黄海6．1级一类地震的地点预测是十分困难的。  相似文献   

陕甘宁盆地川口油田低渗透油藏长6油层裂缝特征   总被引：7，自引：4，他引：7  

张莉  杨亚娟  张玉玲  赵阳  孟志学  严云奎  岳乐平 《西北地质》2002,35(2):41-45

通过对野外野头观测，岩心观察，薄片鉴定、地层倾角测井解释等方法，对川口油田长6油层裂缝进行了研究，川口油田长6油层主层裂缝方向为近EW向，天然显裂缝规模小且不发育，裂缝在原始地层条件下多为闭合状态，只有在人工激发后才会表现出明显的裂缝特征，川口油田储层类型为孔隙型储集层，该区油层埋深500－700m，垂向应力为最小主应力，压裂后理论上应产生水平缝，但受到天然垂直（闭合）缝的影响，在裂缝发育区可能会形成垂直压裂缝，在目前注水条件下，注水实验区储层裂缝的作用还未表现出来。  相似文献   

Effects of volcanic eruptions on the CO₂ content of the atmosphere and the oceans: the 1996 eruption and flood within the Vatnajökull Glacier, Iceland     

S. R. Gí  slason    . Snorrason  H. K. Kristmannsd  ttir    . E. Sveinbj  rnsd  ttir  P. Torsander  J.   lafsson  S. Castet  B. Dupr 《Chemical Geology》2002,190(1-4):181-205

The October 1996 eruption within the Vatnajökull Glacier, Iceland, provides a unique opportunity to study the net effect of volcanic eruptions on atmospheric and oceanic CO₂. Volatile elements dissolved in the meltwater that enclosed the eruption site were eventually discharged into the ocean in a dramatic flood 35 days after the beginning of the eruption, enabling measurement of 50 dissolved element fluxes. The minimum concentration of exsolved CO₂ in the 1×10¹² kg of erupted magma was 516 mg/kg, S was 98 mg/kg, Cl was 14 mg/kg, and F was 2 mg/kg. The pH of the meltwater at the eruption site ranged from about 3 to 8. Volatile and dissolved element release to the meltwater in less than 35 days amounted to more than one million tonnes, equal to 0.1% of the mass of erupted magma. The total dissolved solid concentration in the floodwater was close to 500 mg/kg, pH ranged from 6.88 to 7.95, and suspended solid concentration ranged from 1% to 10%. According to H, O, C and S isotopes, most of the water was meteoric whereas the C and S were of magmatic origin. Both C and S went through isotopic fractionation due to precipitation at the eruption site, creating “short cuts” in their global cycles. The dissolved fluxes of C, Ca, Na, Si, S and Mg were greatest ranging from 1.4×10¹⁰ to 1.4×10⁹ mol. The dissolved C flux equaled 0.6 million tonnes of CO₂. The heavy metals Ni, Mn, Cu, Pb and Zn were relatively mobile during condensation and water–rock interactions at the eruption site. About half of the measured total carbon flood flux from the 1996 Vatnajökull eruption will be added to the long-term CO₂ budget of the oceans and the atmosphere. The other half will eventually precipitate with the Ca and Mg released. Thus, for eruptions on the ocean floor, one can expect a net long-term C release to the ocean of less than half that of the exsolved gas. This is a considerably higher net C release than suggested for the oceanic crust by Staudigel et al. [Geochim. Cosmochim. Acta, 53 (1989) 3091]. In fact, they suggested a net loss of C. Therefore, magma degassed at the ocean floor contributes more C to the oceans and the atmosphere than magma degassed deep in the oceanic crust. The results of this study show that subglacial eruptions affecting the surface layer of the ocean where either Mn, Fe, Si or Cu are rate-determining for the growth of oceanic biomass have a potential for a transient net CO₂ removal from the ocean and the atmosphere. For eruptions at high latitudes, timing is crucial for the effect of oceanic biota. Eruptions occurring in the wintertime when light is rate-determining for the growth of biota have much less potential for bringing about a transient net negative CO₂ flux from the ocean atmosphere reservoir.  相似文献   

缅甸7．6级地震前水化异常分析     

杨杰英 《高原地震》1995,(2)

本文分析了１９９１年１月５日缅甸７．６级大震前，云南省西部水化网观测到的水化异常，这些异常不仅有水氡，还有水汞、ＣＯ２、Ｃａ（＋＋）、Ｍｇ（＋＋）和Ｃｌ－等，异常的时间不仅有中长期，还有短临异常。文中根据观测事实指出，一次强烈地震发生之前，水化学的异常范围不仅仅在距震中２００公里的范围之内，甚至在距震中５００公里的范围内也有分布。  相似文献   

桂阳大溪岭锑矿6号矿脉的断裂控矿特征     

曾志方 《湖南地质》2001,20(1):25-28

桂阳大溪岭锑矿６号主矿脉受断裂控制明显，矿体主要赋存子断裂走向５°－２０°方向区段及倾角８０°～８８°的陡立部位。其资源量约占全矿区锑总资源量的６０％．  相似文献   

IAEA和中国的硫同位素参考物质的δ~(33)S、δ~(34)S值与~(32)S/~(33)S、~(32)S/~(34)S绝对比值     

丁悌平  S.Valkiers  万德芳  白瑞梅  邹晓秋  李延河  张青莲  P.DeBievre 《矿物岩石地球化学通报》2001,(4)

用六氟化硫法对IAEA S 1、IAEA S 2、IAEA S 3、IAEA SO 5、IAEA SO 6、GBW 0 44 14和GBW 0 44 15的δ3 3 S、δ3 4 S值进行了测定。用人工配制的同位素混合物和六氟化硫法对IAEA S 1、IAEA S 2、IAEA S 3和GBW 0 44 14、GBW 0 44 15的3 2 S 3 3 S、3 2 S 3 4 S绝对值进行了标定。其结果对IAEA硫同位素系列参考物质的定值起到了关键作用。  相似文献   

Wasserqualität durch höhere Wasserpflanzen. — Übersicht zur ökotechnologischen Anwendung —     

G. Weise  L. Paul  I. Bahr 《洁净——土壤、空气、水》1992,20(3):150-156

Improving Water Quality by submerged and emergent Macrophytes. — A Review of Ecotechnological Application. Measures of ecotechnology using submerged and emergent macrophytes in native stands or planted littoral stands on the one hand, ingenious swimming plant mats on the other, may be assessed to be successful if applied in combination with additional measures, for instance — reorganization (sanition) of all the area collecting water — biomanipulation of pelagic food chains. Plantation of submerged macrophytes as oxygenators in standing and impounded waters to improve water quality should be avoided. To the contrary, the strategy should be taking measures in order to maximize the light penetrated euphotic zone (z_eu) and simultaneously minimize the mixed zone (z_mix) in order to improve spontaneous settlements of submerged macrophyte stands.  相似文献