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1.
傅里叶变换拉曼探针测定九种气体的定量因子 总被引：2，自引：0，他引：2
采用傅里叶变换拉曼探针测定出９种与地球化学有关的气体拉曼定量因子;Ｈ２２．２５,ＳＯ２１．０６,ＣＯ２１．１３,Ｏ２０．９１,ＣＯ０．８７,Ｎ２１．００,Ｈ２Ｓ３．１１,ＣＨ４８．４２,Ｃ２Ｈ６３．３０。 相似文献
2.
异常查证是加速矿产普查的进程,是发现新矿产地的一条捷径。新一轮国土资源大调查对异常查证提出了新的更高的要求。本文总结了物探、化探异常查证找矿效果,分析了目前异常查证中存在的主要问题,强调了异常查证的重要性和必要性,提出了强化异常查证思考要点及主要途径。 相似文献
3.
《Geochimica et cosmochimica acta》1994,58(1):365-375
The hydrogen isotopic measurement (δD) of the non-exchangeable hydrogens in herbivore bone collagen has potential for paleoclimate research. We have developed the methodology for extracting the hydrogen from collagen for isotopic analysis and for correcting the δD results for hydrogen exchange. Preparations of whole bone powders, demineralized bone, or gelatin extracts from fresh bone samples all give reliable δD results and have isotopic results, yields, and proportions of exchangeable hydrogens consistent with that expected for collagen. Gelatin extraction for removal of contaminants remains a valuable option for the study of fossil bone samples.Vacuum preheating under good vacuum at 150°C for two days for whole bone powders and at 100°C for one day for gelatins is an important step to remove all adsorbed water before samples are oxidized for isotopic analysis. Of the remaining hydrogens released following oxidation, 20.5% in whole bone powders and 23.1% in gelatin extracts exchange with laboratory atmospheric water vapor within 48 hours. The δD results can be corrected for this exchange and for minor effects of sample preparation by using a calibration bone standard to determine the δD value of laboratory water vapor. 相似文献
4.
The influence of salts in the pore water in freezing soils is examined from the experimental viewpoint, using the differential scanning calorimetry technique for generation of multiple endotherms of the frozen test samples. The experimental values obtained for montmorillonite, kaolinite and grundite, are evaluated in terms of unfrozen water contents for the respective soils at various subfreezing temperatures for various concentrations of NaCl. Comparison of experimental values with theoretical predictions using a combined salt exclusion and diffuse double-layer model shows excellent quantitative agreement for the montmorillonite soil samples, but only qualitative agreement for the kaolinite and grundite soils. The reasons for this lie in the theoretical model requirement for interlamellar migration of water in soil freezing for suitable application of the diffuse double-layer part of the model. 相似文献
5.
X射线荧光光谱法测定土壤样品中碳氮硫氯等31种组分 总被引：3，自引：3，他引：3
利用新型的ZSX Primus Ⅱ型X射线荧光光谱仪采用粉末压片法直接测定土壤样品中的C、N、S、Cl等31种元素。各元素分析晶体为N采用RX45，C采用RX61，Na、Mg采用RX25，C1、S、P采用Ge，Si、Al采用PET，其余元素均采用LiF200。结果表明，方法的检出限、精密度和准确度对绝大多数元素而言，均可满足多目标地球化学调查样品分析的质量要求： 相似文献
6.
T. M. Rachkovskaya 《Astronomy Reports》2000,44(4):227-234
Using high-resolution spectra, we have determined the abundances of carbon (logε(C)), nitrogen (logε(N)), oxygen (logε(O)), silicon (logε(Si)), sulphur (logε(S)), and some other elements for three δ Scuti stars. Logε(C) for all three stars and logε(N) for δ Sct and HD 127986 are close to the solar values, while there appears to be a slight (0.15 dex) nitrogen deficiency for 14 Aur. The logε(O) values correspond to a 0.30-dex deficiency for 14 Aur and δ Sct and a 0.20-dex deficiency for HD 127986. The values of logε(Si) for the three stars are close to solar, and the logε(S) values indicate a slight deficiency (0.10 dex) for 14 Aur and HD 127986 and a 0.20-dex excess for δ Sct. Comparison of the elemental abundances for seven δ Scuti stars with those for Am stars shows that the mean deficiencies of C, N, and O are smaller for pulsating δ Scuti stars than for Am stars with similar effective temperatures. The sulphur abundances are virtually the same for both types of stars. 相似文献
7.
针对川东北地区通南巴构造带海相碳酸盐岩储层的双孔特征,基于嘉二段、飞三段取芯及测试资料,利用岩心刻度测井的方法,确定储层下限参数,建立适合川东北地区通南巴构造带及邻近地区海相碳酸盐岩储层参数计算模型与评价标准.结果表明:川东北地区通南巴构造带碳酸盐岩储层下限值标准为孔隙度1.6%,裂缝孔隙度0.05%,含气饱和度50%.该成果为川东北地区通南巴构造带海相碳酸盐岩气藏内部参数分布描述与最终形成气藏三维数据体提供了可靠的资料,在实际生产中取得了良好的应用效果,为油田进一步勘探、开发和增产措施提供可靠的依据. 相似文献
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9.
This paper sets forth the theoretical background and basic numerical expressions for the incorporation of elastic-plastic constitutive equations for ductile rock into a finite element computer code. The derivation of an expression for the total strain rate is performed both for a total stress formulation and for a formulation that employs the concept of effective stress for inelastic behaviour. Specific expressions for the incremental strain rate are presented for the case of a porous material having a quadratic initial yield surface and observing the associated flow rule with a special hardening law for subsequent plastic deformation. A final section of the paper summarizes the expressions required to insert the quadratic yield surface model into a finite element code. 相似文献
10.
Kyungik Gil Haeyeon Rho Daeik Kim Michael K. Stenstrom 《Environmental Earth Sciences》2012,65(3):929-936
The Modified Bio-P module was evaluated in terms of the kinetic rate expression and engineering parameters, comparing the
measured data of full-scale plant with simulated data. To simulate step-feed BNR (Biological Nutrient Removal), the ASM3 (Activated
Sludge Model 3) with the EAWAG Bio-P Module (The Swiss Federal Institute for Environmental Science and Technology) and the
ASM3+Modified Bio-P module were used. The RMSEs (root mean square error) of the T-N (total nitrogen) concentration of the
effluent levels of measured and simulated examples were 2.29 for ASM3+Bio-P and 1.28 for ASM3+Modified Bio-P. In the case
of T-P (total phosphorus), the RMSEs were 0.28 for ASM3+Bio-P and 0.25 for ASM3+Modified Bio-P. The annual removal rates for
T-N were 0.77 for the measured, 0.69 for the Bio-P, and 0.74 for the Modified Bio-P samples, while the annual removal rates
for T-P were 0.64 for the measured, 0.72 for the Bio-P, and 0.60 for the Modified Bio-P cases. With simulated data, the Modified
Bio-P model was a better fit for the field data compared to Bio-P. The Modified Bio-P module reproduced the step-feed process
more effectively than the Bio-P module. 相似文献
11.
《International Geology Review》2012,54(4):425-432
A review of the various geophysical methods used in prospecting for various mineral deposits, and recommendations for the improvement of known methods and the need for more precision. Methods of prospecting for various metals are discussed as well as means for raising their effective ness in exploration for ore deposits. The need for close cooperation between qualified members of geophysical departments and members of exploration organizations and the geophysical engineer is stressed.- -C. E. Sears, Jr. 相似文献
12.
Landslides are one of the most damaging and threatening hazards associated with seismically induced slope movements. Estimations of support conditions for slope displacements are important for taking preventive measures to avoid landslide events in future. California's Division of Mines and Geology (DMG) procedure is utilised in the present paper for estimating the slope failure mechanism under seismic conditions. In this study, the DMG procedure has been explained and has also been incorporated in a Geographic Information System (GIS) using Arc-GIS software from Environmental Systems Research Institute. Further, it is utilised for establishing a seismically induced slope displacement map for the Skien municipality area of Telemark County in Norway. The motivation for selecting this site was the availability of geotechnical parameters for the site. Three different displacement maps have been produced for earthquake scenarios of magnitude 5, 6 and 7, respectively. The maximum displacement of 133 cm is estimated for earthquake scenario of magnitude 7. It is noticed that the sensitive areas for slope failure remain the same under different earthquake scenarios. A displacement tool based on the DMG procedure has been created in the Arc-tool box in Arc-GIS software. This tool minimises the efforts for inserting formulas for making raster displacement maps. By using the displacement tool one can generate final products like displacement maps automatically at high accuracy and in quick time. The prepared slope displacement maps of study area are used for landslide susceptibility zonation (LSZ) map preparation. The LSZ maps are useful for landslide hazard assessment and further can be utilised by planners, civil engineers and local administrators for town planning and policy-making. 相似文献
13.
应用多光谱ASTER数据对ETM遥感异常的定性判别研究——以东昆仑五龙沟为例 总被引：5，自引：0，他引：5
文中讨论了新的找矿参数——蚀变遥感异常的地质基础和光谱前提,在矿床地质学和蚀变矿物光谱参数特征的基础上,编制了一张用于遥感异常提取及对其地质解释的表格。ETM遥感异常提取技术已在全国推广,ASTER数据可以在三个方面对已推广的ETM起到重要的补充作用：1.利用短波红外增设的波段,对某些矿致异常区分其矿化（矿床）类型;2.利用增设的热红外波段区分某些岩性;3.可有助于解决ETM因第7波段太宽而产生的许多疑难问题。本文以东昆仑五龙沟为例讨论了ASTER对于解决ETM遥感异常性质判别困难方面的作用。 相似文献
14.
基于GIS技术的江西德兴地区水系沉积物重金属污染的潜在生态危害研究 总被引：2，自引：0，他引：2
矿山开发必然对矿区及周边地区的生态环境造成危害。对矿山及其周边地区的生态环境进行现状调查和评价,为生态环境治理客观依据,显得极为重要。在江西德兴地区,系统采集该区域330个水系沉积物样品,并采用X荧光光谱仪和电感耦合等离子原子发射光谱仪为主体的分析配套方案分析样品中重金属的含量基础上,采用潜在生态危害指数法和GIS空间分析技术研究该地区的水系沉积物重金属污染的潜在生态危害。研究结果表明,德兴地区水系沉积物重金属污染的潜在生态危害范围较大,强—很强的生态危害区主要集中德兴铜钼和铅锌矿区、德兴河与大坞河流域及其周边地区,而乐安河下游沿岸以及乐平附近与西北部景德镇附近的少数煤矿区、婺源县城附近和东南角玉山县北西的铜钼矿点附近地区主要为零星中等生态危害。 相似文献
15.
H. Cynn A. M. Hofmeister P. C. Burnley A. Navrotsky 《Physics and Chemistry of Minerals》1996,23(6):361-376
Infrared absorption measurements were taken from 100 to 5000 cm?1 of a natural chondrodite and three dense hydrous magnesium silicates: phase A, phase B, and superhydrous phase B (shy-B). Raman spectra were also acquired from phase B and the chondrodite. Roughly half of the lattice modes are represented and our data are the first report of the low frequency modes. Comparison of our new spectra to symmetry analyses suggests that multiple sites for hydrogen exist for all the phases. The shy-B we examined crystallizes in P21 nm with two OH sites. Models for the density of states are constructed based on band assignments for the lattice modes and for the OH stretching vibrations. Heat capacity CP and entropy S calculated using Kieffer's formulation should be accurate within 3% from 200 to 800 K. Model values for CP at 298 K are 299.6 J/mol-K for chondrodite, 421.5 J/mol-K for phase A, 529.4 J/mol-K for shy-B, and 618.9 J/mol-K for phase B. Model values for S298 0 are 234.2 J/mol-K for chondrodite, 303.5 J/ mol-K for phase A, 377.9 J/mol-K for shy-B, and 473.3 J/mol-K for phase B. Debye temperatures are near 1000 K. 相似文献
16.
Naomi AOTA Yutaka MIYAMOTO Sakae KOSANDA Yasuji OURA Koh SAKAMOTO 《Geostandards and Geoanalytical Research》1994,18(1):65-84
Fifteen rock reference samples "Igneous rock series" issued by the Geological Survey of Japan were analysed for up to 31 elements by neutron activation analysis (NAA); 14 MeV-NAA for Si and Al, fission track method for U, radiochemical and instrumental NAA for rare-earth elements, and instrumental NAA for the remaining elements, with reactor neutrons for the latter three. The present results are compared with published values. 相似文献
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18.
松辽盆地白垩系营城组埋藏火山机构岩相定量模型及储层流动单元特征 总被引：7，自引：1，他引：6
松辽盆地营城组火山机构类型划分为碎屑岩火山机构、熔岩火山机构和复合火山机构3种。碎屑岩火山机构中火山通道相占9.3%,爆发相占55.3%,喷溢相占29.2%,侵出相占1.4%,火山沉积相占4.8%;火山机构半径为0.5～1.5 km,高度为50～220 m。熔岩火山机构中火山通道相占8.1%,爆发相占23.4%,喷溢相占62.6%,侵出相占5.1%,火山沉积相占0.8%;火山机构半径为1～2 km,高度为200～300 m。复合火山机构中火山通道相占4.9%,爆发相占34.4%,喷溢相占56.8%,侵出相占2.6%,火山沉积相占1.3%;火山机构半径为2～4 km,厚度为300～450 m。亚相控制储层流动单元的规模,碎屑岩火山机构的储层流动单元范围为0.3～1.5 km,厚度小于60 m。熔岩火山机构的储层流动单元范围为1～2 km,厚度小于80 m。复合火山机构的储层流动单元范围为1.5～3.0 km,厚度小于100 m。各类火山机构气藏开发时的井距和压裂方案均存在差异。 相似文献
19.
电感耦合等离子体质谱法同时测定地下水中硼溴碘 总被引：6，自引：4，他引：2
建立了电感耦合等离子体质谱法同时测定地下水中B、Br、I的方法。选定φ=2%(体积分数)的稀NH3.H2O介质消除碘的记忆效应。采用干扰较少的10B和79Br同位素。B、Br、I在0~10 000 ng/mL呈良好的线性关系。方法的检出限为10B 0.176 ng/mL,79Br 0.876ng/mL,127I 0.132 ng/mL;精密度(RSD,n=12)为10B 2.86%,79Br 3.36%,127I 2.69%;10B的阶梯加标回收率为94.6%~101.5%,79Br为98.3%~104.9%,127I为96.5%~102.0%。 相似文献
20.
项目国家审计是一种执法监督活动,设计方满足审计要求是必不可少的义务和职责。通过铁路建设项目国家审计,初步分析国家审计对设计方要求,提出设计方满足项目国家审计要求的措施,为设计方适应国家投资市场规则及其变化趋势,规避设计风险,拓展设计方生存空间提供思路。 相似文献