河南省农业气象情报资料处理系统

根据实际业务工作的需要,使用C++Builder可视化开发工具,开发了Windows环境下的河南省农业气象情报资料处理系统,该系统具有报码分析、文本生成和图形显示等功能.     

羌塘盆地那底岗日地区中侏罗世层序地层与碳、氧、锶同位素响应

羌塘盆地那底岗日地区中侏罗世沉积了一套稳定的滨浅海相碳酸盐岩与碎屑岩地层,通过层序地层研究划分出五个三级层序。对其中四个层序内碳酸盐岩碳、氧、锶稳定同位素测试分析得出,不同层序、层序界面及层序内不同体系域的δ13 C、δ180、N(87Sr/86Sr)值均有明显的差异,并具规律性变化,整体上反映出研究区中侏罗世发生了多次海平面升降变化和气候、构造活动的演变,为层序地层研究提供了定量的地质地球化学依据。     

八面河地区原油、烃源岩中甾类化合物的分布特征及其应用

对渤海湾盆地八面河地区31个分别形成于还原性咸化水体和淡水环境的页岩和泥岩样、20个油样中甾类化合物进行了剖析。结果表明该区烃源岩、原油中的甾类化合物异常丰富，主要包括C27－29规则甾烷、C28－304－甲基甾烷、甲藻甾烷以及芳香甾类；不同层段烃源岩中甾类化合物的分布各具特色，发育于牛庄洼陷南斜坡咸化水体的富藻类沙四段页岩富含4－甲基甾烷及甲藻甾烷，形成于淡水环境的沙三段泥岩中甲藻甾烷不太发育。烃源岩、原油中规则甾烷的分布型式明显有别于甲基甾烷，指示两类化合物可能来源于不同的藻类属种。甾类化合物的分布特征受控于古环境、生物先质种类及热成熟度等多种因素。不同层段甾类化合物的特征性分布使其成为该区油源岩确认的关键指标。结果还表明，甲基甾烷在油源岩识别中比规则甾烷具有更好的应用效果。依据甾类化合物，可判断埋深超过2700m的Es4烃源岩与原油具有较好的相关性，发育于牛洼洼陷南斜坡的未熟－低熟特殊烃源岩－富藻类页岩与原油没有可比性，该结论是对近期油源调查结果的进一步确认。     

华北地层大区寒武纪早期地层统一划分与对比问题

基于华北地层大区数百条寒武纪早期地层剖面与安徽淮南地区基准层序(2组2亚组15段1个亚段)和带序(6个三叶虫带)的确切对比,编制了新的沉积分区图;依据有无猴家山组和馒头组下亚组是否完整,划分出5个沉积区;讨论了各区与基准层序-带序的对比;明确了各地方性岩石地层单位(五山组、李官组、碱厂组、辛集组、朱砂洞组、苏峪口组、五道淌组、昌平组、府君山组、老庄户组、水洞组、黑沟组等)的层位归属(具体至段),确认与寒武纪早期地层有关的3个沉积间断(皖北上升、豫陕上升和燕辽上升),归属于重新厘定的蓟县运动的3个期次.     

Neoproterozoic to Early Cambrian history of an active plate margin in the Teplá–Barrandian unit—a correlation of U–Pb isotopic-dilution-TIMS ages (Bohemia, Czech Republic)

The Teplá–Barrandian unit (TBU) of the Bohemian Massif shared a common geological history throughout the Neoproterozoic and Cambrian with the Avalonian–Cadomian terranes. The Neoproterozoic evolution of an active plate margin in the Teplá–Barrandian is similar to Avalonian rocks in Newfoundland, whereas the Cambrian transtension and related calc-alkaline plutons are reminiscent of the Cadomian Ossa–Morena Zone and the Armorican Massif in western Europe. The Neoproterozoic evolution of the Teplá–Barrandian unit fits well with that of the Lausitz area (Saxothuringian unit), but is significantly distinct from the history of the Moravo–Silesian unit.The oldest volcanic activity in the Bohemian Massif is dated at 609+17/−19 Ma (U–Pb upper intercept). Subduction-related volcanic rocks have been dated from 585±7 to 568±3 Ma (lower intercept, rhyolite boulders), which pre-dates the age of sedimentation of the Cadomian flysch ( t chovice Group). Accretion, uplift and erosion of the volcanic arc is documented by the Neoproterozoic Dob í conglomerate of the upper part of the flysch. The intrusion age of 541+7/−8 Ma from the Zgorzelec granodiorite is interpreted as a minimum age of the Neoproterozoic sequence. The Neoproterozoic crust was tilted and subsequently early Cambrian intrusions dated at 522±2 Ma (T ovice granite), 524±3 Ma (V epadly granodiorite), 523±3 Ma (Smr ovice tonalite), 523±1 Ma (Smr ovice gabbro) and 524±0.8 Ma (Orlovice gabbro) were emplaced into transtensive shear zones.     

Hydration and refractive indices of Holocene tephra glass in Hokkaido, Northern Japan

Refractive indices of incompletely hydrated tephra glasses vary widely. Thus, glass refractive index is not a practical indicator for identifying Holocene tephras. Hydration near the surface of tephra glass shards can be removed by either hydrofluoric acid treatment or annealing for 12 h at 400°C. The annealing procedure is a particularly reliable and simple way to dehydrate tephra glasses. Standard deviations (s) of refractive indices for glasses after 12 h annealing are small (s=0.0014–0.0018), in contrast with untreated glasses (s=0.0034–0.0405). The refractive indices of dehydrated tephra glasses are 0.006–0.014 lower than those of the untreated (hydrated) glasses. Using the 400°C 12-h annealing procedure, values for the refractive indices of eight Holocene tephras in Hokkaido were obtained. These refractive indices are useful indicators for identification and correlation of Holocene tephras.     

河南省农业气象情报资料处理系统

根据实际业务工作的需要，使用C＋＋Builder可视化开发工具，开发了Windows环境下的河南省农业气象情报资料处理系统，该系统具有报码分析、文本生成和图形显示等功能。     

Total N,total P and organic matters content in floodplain soils of Xianghai Nature Reserve

Soil sediment samples of 10 layers with a spacing of 10 cm each were collected in different floodplain zones adjacent to Huolin River in the Xianghai Nature Reserve, and contents of total N, total P and organic matters were analyzed. The results showed that contents of total N, total P and organic matters were generally decreasing with the increase of distance from sample locations to the river channel, and contents of the three items were generally higher in the upper soil layer than that in the lower soil layer. The content variations displayed how flooding functions influenced nutrient matter content variations in floodplain soils since the flood inundation frequencies of the sample locations varied. The correlation analysis displayed that there were remarkable relativities between total N, total P and organic matters within definite spatial distance from the Huolin River channel.     

Size Scaling of Cross Correlation Between Multiple Variables

Reservoir models have large uncertainty because of spatial variability and limited sample data. The ultimate aim is to use simultaneously all available data sources to reduce uncertainty and provide reliable reservoir models for resource assessment and flow simulation. Seismic impedance or some other attribute provides a key source of data for reservoir modeling. These seismic data are at a coarser scale than the hard well data and it not an exact measurement of facies proportions or porosity. A requirement for data integration is the cross-covariance between the well and seismic data.The size-scaling behavior of the cross correlation for different measurement scales was nvestigated. The size-scaling relationship is derived theoretically and validated by numerical studies (including an example with real data). The limit properties of the cross-correlation coefficient when the averaging volume becomes large is shown. After some averaging volume, the volume-dependent cross-correlation coefficient reaches a limit value. This plateau value is controlled mainly by the large-scale behavior of the cross and direct variograms.The cross correlation can increase or decrease with volume support depending on the relative importance of long- and short-scale covariance structures. If the direct and cross variograms are proportional, there is no change in the cross correlation as the averaging volume changes. Our study shows that the volume-dependent cross-correlation coefficient is sensitive to the shape of the cross variogram and differences between the direct variograms of the well data and seismic data.