东昆仑地质特征及晚古生代——中生代构造演化

东昆仑造山带是一个经历多期构造活动的复杂造山带,大致划分为昆北花岗岩浆弧带、昆中双型俯冲带、昆南混杂岩带。其地质特征反映了昆中断裂带在历次构造演化中的主导性。。晚元古代华北、华南两大古板块沿昆中断裂一线俯冲碰撞,为后期构造演化奠定了基础。晚古生代—中生代构造演化别具一格。经整体分析、现位恢复,具有泥盆—早二叠伸展滑覆、早二叠纪末—中三叠纪B型俯冲、中三叠纪末—早侏罗纪A型斜向俯冲三个演化阶段。     

山东省天气预报逐级指导技术研究

介绍了山东省天气预报逐级指导技术研究的技术方法和预报逐级指导业务系统；给出了常规要素、冰雹和暴雨预报对比试验的TS评分结果和研究结论。     

Study on Fine Crustal Structure of the Sanhe-Pinggu Earthquake （M8.0） Region by Deep Seismic Reflection Profiling

Two near-vertical deep seismic reflection profiles (140km-long, 24-fold) were completed in the 1679 Sanhe-Pinggu earthquake (M8.0) region. The profiles ran through the Xiadian fault and the Ershilichangshan fault. The profiling result shows that the crust in this region is divided into the upper crust, the lower crust and the crust-mantle transitional zone by two powerful laminated reflectors: one at the two-way travel-time of about 7.0s (21 km), the other at about11.0～12.5s (33～37km). Crustal structure varies significantly in vertical direction. The shallow part is characterized by obvious stratification, multilayers and complexity. The upper crust on the whole features reflection “transparency“, while the lower crust features distinct reflectivity. Crustal structure also varies a lot in the lateral direction. The main fracture in this region is the deep fault under the Xiadian fault. This deep fault is steeply inclined (nearly vertical), and is supposed to be the causative fault of the Sanhe-Pinggu MS.0 earthquake. The two profiles respectively reveal the existence of local strong reflectivity in the lower crust and the lower part of the upper crust, which is assumed to be a dike or rock mass formed by the upwelling and cooling down of materials from the upper mantle. Magmatic activity in this part brought about differences in regional stress distribution, which then gave rise to the formation of the deep fault. That is supposed to be the deep structural setting for the Sanhe-Pinggu M8.0 earthquake.     

Certified Reference Materials of Copper, Lead and Zinc (Silver) Ore Rocks and Their Concentrates (GSO 1-7)

Sulfide mineral certified reference materials GSO 1-7, recently prepared by the Institute of Geophysical and Geochemical Exploration (IGGE), were analysed by twelve laboratories. Various reliable analytical methods based on different principles were adopted and classical chemical methods were taken as the primary analytical methods, by which 5729 determinations were carried out, 1425 average data were obtained, and twenty one to twenty seven elements and components were certified.     

地应力的重力来源与计算方法探讨

以地球物理学的基本理论为指导,根据地球重力场的特点,探讨了地应力的重力来源。以严密的理论分析为依据,指出了地应力产生的主要原因仍在于重力(即地心引力),重力不仅可以产生竖向地应力、而且还可产生水平地应力。给出了重力所致竖向地应力与水平地应力的科学表达方式。     

Semigeostrophic Frontal Boundary Layer

The viscous semigeostrophic solutions obtained for the baroclinic Eady wave fronts are analyzed for the generation of the cross-frontal temperature gradient in the boundary layer. In the case of free-slip boundaries, the cross-frontal gradient is maximally generated at the surface by meridional temperature advection. In the case of no-slip boundaries, surface friction reduces the meridional temperature advection in the boundary layer: The maximum generation occurs above the surface layer and the temperature gradient at the surface is maintained by vertical diffusion. The no-slip solution is compared with the Ekman-layer model solution. Errors are quantified for the use of the Ekman-layer model in the mature state of frontogenesis.The surface frontogenesis is found to be affected by diffusivity both directly and indirectly. The direct effect of diffusivity is represented explicitly by the diffusion term in the potential temperature equation. The indirect effect of diffusivity is related implicitly to the temperature advection caused by the viscous part of the ageostrophic motion whose horizontal velocity component is defined by the frictional wind deflection (away from the geostrophy). The direct effect of diffusivity is frontolytical, whilst theindirect effect of diffusivity is frontogenetic in the mesoscale vicinity of the front. The indirect effect of diffusivity contributes dominantly to the mesoscale surface frontogenesis for the free-slip case, but it is offset by the divergence of the dynamic part of the ageostrophic motion at the surface level for the non-slip case.     

山西应县木塔修缮中的问题及对策

对目前山西应县木塔修缮中存在的一些认识问题进行了讨论。论证了纳米复合纤维技术用于修缮应县木塔的目标、做法、效果和优势 ,指出用纳米复合纤维技术修缮山西应县木塔是可行的。     

上海地区抗拔承载力系数λ取值的探讨

对抗拔承载力系数λ进行简要评述,通过对3个工程实例的Q-s曲线进行数学方法拟合,得出其极限抗拔承载力,同时按照规范方法计算其单桩极限抗拔承载力,然后对两者关系进行比较。对抗拔桩设计中的抗拔承载力系数λ取值及桩侧摩阻力f。的取值进行了探讨,所得结论将进一步对抗拔桩工程设计提供有益的参考依据。     

基础地理信息数字产品文档薄系统设计探讨

基础地理信息数字产品文档薄是1∶1万省级基础测绘的一部分,用于记录基础测绘全过程的数据和资料.传统的做法是大量填表,不仅耗时、费力,且无法在测绘生产过程中充分使用,资料的归档、查找、利用也很不方便.新设计的系统,解决了以上问题,其方法和技术为将来的测绘生产提供了借鉴.