贵州中东部剩余重力异常与区域矿产分布关系

重点研究1:20万剩余重力异常,结合航磁、物性、地质等资料,初步圈定区内隐伏、半隐伏岩浆岩体,对研究与重力异常、岩体分布关系密切的矿产的时间、空间分布及其成因,有一定参考价值和指示意义。     

GPS接收机测试评估系统数据库的建立

为评定GPS接收机的性能,建立的接收机测试评估系统在对接收机进行测试的过程中将涉及到大量的测试相关数据。为了对这些数据进行科学、安全的存储管理,文中通过分析数据的来源、数据的存储类型以及数据的相互关系等,在考虑了数据库运行的安全性和稳定性的基础上,详细地介绍了GPS接收机测试评估系统数据库的建立。     

新疆伽师及邻近地区现今地壳形变的GPS监测与研究

利用高精度数据软件对伽师及邻近地区的GPS监测网观测数据进行计算分析(基线精度达到了 10 - 8～ 10 - 9) ,获得了该地区的现今地壳形变速率图 .结果表明 ,伽师及邻近地区在印度板块的推挤作用下 ,地壳正快速缩短变形 ,主压应力为近南北方向 .各地块运动速率不同 ,平均应变率为 0 .0 4× 10 - 6 /a .     

Characteristics and Origin of Tight Oil Accumulations in the Upper Triassic Yanchang Formation of the Ordos Basin, North-Central China

The Upper Triassic oil accumulations in the Ordos Basin is the most successful tight oil play in China,with average porosity values of less than 10% and permeability values below 1.0 mD.This study investigated the geological characteristics and origin of the tight oil accumulations in the Chang 6 member of the Upper Triassic Yanchang Formation in the Shanbei area based on over 50,000 petrological,source-rock analysis,well logging and production data.The tight oil accumulation of the Chang 6 member is distributed continuously in the basin slope and the centre of the basin.The oilwater relationships are complex.Laumontite dissolution pores are the most important storage spaces,constituting 30%-60% of total porosity and showing a strong positive relationship with oil production.The pore-throat diameter is less than 1 μm,and the calculated critical height of the oil column is much larger than the tight sand thickness,suggesting that the buoyancy was probably of limited importance for oil migration.The pressure difference between the source rocks and sandstone reservoirs is inferred to have provided driving force for hydrocarbon migration.Two factors of source-reservoir configuration and laumontite dissolution contributed to the formation of the Chang 6 tight oil accumulations.Intense hydrocarbon generation and continuous sand bodies close to the hydrocarbon kitchen are the foundation for the large-scale oil distribution.Dissolution of feldspar-laumontite during the process of organic matter evolution generated abundant secondary pores and improved the reservoir quality.     

峰谷平均法及其在计算浅源合成地震图中的应用

为了计算在震源和接收点深度相同或相近情况下分层半空间介质中的合成地震图,在重复平均法的基础上加以改进,提出一种有效的数值积分方法--峰谷平均法.根据被积函数的变化特点,将波峰和波谷值抽取出来组成慢收敛序列,利用重复平均法快速而准确地求出其极限值.与半解析方法相比,本文方法不仅数学处理上非常简单,而且易于数值实现.数值试验表明,本文方法是准确和高效的.     

RS和GIS支持下的盐池县生态景观格局动态变化研究

基于遥感（RS）和地理信息系统（GIS）技术，以Landsat TM/ETM图像为基本数据源，综合运用景观生态学理论和方法，对我国典型农牧交错生态脆弱区宁夏盐池县1991~2000年生态景观格局动态变化进行了研究。结果表明： 盐池县各景观类型都发生了很大程度的消长变化，景观格局处于快速调整和不稳定发展阶段，但生态景观基质还是草地，景观格局始终呈农牧交错结构。     

Burst strain disturbance—A new test study on fracture precursor

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格尔木－额济纳旗地学断面岩石图结构的磁场分析

在格尔木－额济纳旗地学断面的综合研究中，处理和解释了沿断面实测的高精度磁测剖面和大范围的航磁资料．所采用的处理方法有视磁化率填图、长波磁异常提取、方向滤波和航磁数字图像处理，并反演了地壳磁层的上、下界面深度．依据资料处理结果，对研究区内构造断裂的分布、不同地体和构造单元的划分与边界位置及岩浆活动性等都提出了新的认识．利用位场模拟方法，得出了代表格尔木－额济纳旗地学断面内地壳结构的磁模型．     

Content Variations of Rubidium and Bromide in Sylvite Derived from Carnallite by Leaching of Magnesium Chloride

正The relationship between sylvinite and carnallite is important in the potash mine body contained carnallite,especially sylvinite overlies carnallite,the reverse of a normal depositional sequence.Trace elements are more