茂兴地区杨大城子油层砂体沉积环境特征及分析

在对岩心详细观察的基础上，通过时研究区杨大城子油层沉积物的结构、构造、颜色、组合韵律、垂向序列、电性响应、砂体平面展布特征的综合分析，认为研究区杨大城子油层总体上是－套河流相沉积。作为油气储集层的砂体主要是点坝砂体。     

北淮阳金寨—苏仙石地区中生代花岗岩的成因类型及岩浆演化特征

摘 要　 北淮阳金寨—苏仙石地区中生代侵入岩出露面积约150km 2 ‚按岩石谱系单位的划 分原则‚可分为3个超单元（包括10个单元）和3个独立单元。根据主要造岩矿物及副矿物组 合、岩石化学和地球化学特征判别结果‚岩体成因类型以 I 型为主‚少数为 A 型和 S 型。岩 浆来源约30km 深处‚相当于下地壳或壳幔过渡部位。岩体形成深度约3～4km‚压力约0∙1 ～0∙2GPa。形成温度约866～1150℃‚氧逸度 log f O 2 平均为—10∙97。进一步讨论了岩浆的 水逸度、水压及岩浆密度、岩浆演化和侵入岩与火山岩的成因关系。     

To afforest the desert with the technology of peat composed of rotten mosses and the sustainable development of the oases

Only by providing the good conditions for the growth of plants can a favorable ecologicalenvironment on which human beings rely for existence be created. The upside-down-T dou-ble-layer water-conserving afforestation way is developed according to the situation of the short-age of water resources, low soil fertility and vast land in the arid areas. The characteristics of theafforestation way are to change the microenvironment in the root area of the plants, provide thefavorable conditions for the growth of plants, and reduce the necessary conditions for the growth ofplants in large areas in the arid regions. Meanwhile, the size of its water-conserving layer can bechanged according to the size of the planted trees. The different ways of the bottom wa-ter-conserving layer can be used according to the requirements. The afforestation way is suitablefor planting trees on a small scale and also for afforesting on a large scale under the adverse cir-cumstances in the arid areas, and has been effectively used in the afforestation in the hinterland ofTaklamakan Desert and the southern marginal zone of Gurbantonggut Desert. The prospects ofthe afforestation way are broad in afforestation and desertification control in the desert regions.     

辽宁及其邻区1900—1949年M≥5级地震参数研究

我们搜集了国际国内地震台网资料、宏观考察资料、地震专题研究报告,对1900—1949年5级以上地震全部进行了核查,重新进行定位处理,并结合宏观考察资料和前人工作成果进行分析研究,得到较为准确的震中位置。通过这项研究,增补了原目录中遗漏的地震,并对目录中的错误进行了修正,从而得到一份较为完整可靠的地震目录。     

基于HBCORS的网络RTK技术在海籍测量中的应用

简单介绍网络RTK技术工作原理,以秦皇岛市昌黎县海籍调查为例,详细说明基于河北连续运行参考站(HBCORS)的网络RTK技术在海籍测量中的应用,并作出精度统计分析,最后对网络RTK技术误差来源及解决方法进行分析,给出了有益的结论。     

甘肃陇南地震滑坡体自然恢复5a后植被群落分布特征

以甘肃陇南地震滑坡体自然恢复过程中植被群落为研究对象,以坡面为尺度,采用样带结合海拔梯度的方法进行了调查。根据野外调查资料,应用生物多样性的原理和方法分析了甘肃陇南地震滑坡体自然恢复5 a后植被群落结构特征及多样性空间分布的变化情况。结果表明试验区内主要植物以菊科和禾本科植物为主,群落垂直结构明显,大体分为3层;该群落中一年生草本植物种类最多,是该群落中处于优势地位的生活型;在7个样地中,随着海拔升高,Shannon-Wiener多样性指数(H′)的变化趋势和Pielou均匀度指数(E)的变化趋势基本相同,均呈现先增大后减小的单峰趋势,Margalef丰富度指数(R)和Simpson优势度指数(C)表现出基本相同的变化趋势,均表现出先减小后增大再减小的偏峰格局势,峰值偏向高海拔区。     

应用遥感影像制作矿区大比例尺地形图

本文在专业的遥感和地理信息系统软件平台支持下,利用Aster立体像对和IKONOS高分辨率遥感影像分别提取矿区地形信息和地物信息,结合矿区的实际特点,参照地形图制作规范对矿区大比例尺地形图的制作进行了分析和探讨,结果表明利用遥感影像进行矿区大比例尺地形图制作不但周期短、速度快、时效性强,而且精度完全能够满足生产需要,是一种实用可行的方法。     

中国大陆及邻区、川滇成组强震活动特征初步研究

将中国大陆及其邻区1902年以来MS≥7地震的成组活动划分出7组,其首发大震分别为1902年阿图什8.2级,1911年阿拉木图8.2级,1920年海原8.5级,1931年富蕴8.0级,1946年缅甸7.8级,1966年邢台7.2级,1988年缅甸7.2级。川滇MS≥6.7地震成组活动划分出5组,其首发强震为1913年峨山7.0级,1933年茂县7.5级,1948年理塘7.3级,1966年东川6.5级、6.2级,1988年澜沧7.4级。其中,川滇MS≥7的首发大震滞后中国大陆首发大震几个月至4年不等。按成组大震的界定,目前中国大陆处于1998~2007年(估计)的大震少发时段。川滇未来1~2年的大震形势为川滇西部存在发生大震的可能性。中国大陆新一轮强震成组活动中的大地震将可能在2007~2009年前后发生,主体危险区可能为天山地震带中段及川滇东部。2007~2008年可能出现5~6级地震的增强过程。巧家—东川一带可能最先发生6级地震。     

基于DInSAR技术与WorldView-2影像的煤矿塌陷区信息提取研究

结合DIn SAR与World View-2光学遥感解译技术,对研究区进行多源数据处理,提取研究地区的煤矿塌陷区信息,然后对处理后的两种结果进行对比。二者既有区别,又可以互补,最终在研究区形成完整的塌陷区信息。     

Nano-scale pore structure and fractal dimension of organic-rich Wufeng-Longmaxi shale from Jiaoshiba area,Sichuan Basin: Investigations using FE-SEM,gas adsorption and helium pycnometry

Much attention have been recently paid to the upper Ordovician Wufeng shale (O₃w) and lower Silurian Longmaxi shale (S₁l) in the Jiaoshiba area of Sichuan Basin, which is now the largest producing shale gas field in China. Field emission scanning electron microscopy (FE-SEM), low pressure gas (N₂ and CO₂) adsorption, helium pycnometry, X-ray diffraction and geochemical analyses were performed to investigate the pore structure and fractal dimension of the pores in O₃w-S₁l shale formation in the Jiaoshiba area. FE-SEM images show that organic matter (OM) pores are dominant in the organic-rich samples and these pores are often irregular, bubble-like, elliptical and faveolate in shape, while in organic-poor samples, limited and isolated interparticle (interP), intraparticle (intraP) and OM pores are observed. Reversed S-shaped isotherms obtained from nitrogen adsorption are type Ⅱ, and hysteresis loops indicate that the shape of micropore in the samples is slit-or plate-like. BET surface areas and total pore volume vary from 12.2 to 27.1 m²/g and from 1.8 × 10⁻² to 2.9 × 10⁻² cm³/g, with an average of 19.5 m²/g and 2.3 × 10⁻² cm³/g, respectively. Adsorption volume from both N₂ and CO₂ adsorption increases with respect to TOC contents. Porosities obtained from helium porosimetry are comparable with these from gas (CO₂ and N₂) adsorption in O₃w-S₁l shale. However, porosity determined by quantitative FE-SEM analysis is much smaller, which is mainly related to limited resolution and the small areas of investigation.Based on the Frenkel-Halsey-Hill (FHH) model of low-pressure N₂ adsorption, fractal dimensions of the pores varied from 2.737 to 2.823. Relationships between pore structure parameters and TOC content, mineral composition and fractal dimension reveal that the fractal dimension is mainly associated with micropores. Samples with higher TOC content, higher quartz content and lower clay content tend to contain more heterogeneous micropores, resulting in higher fractal dimensions and more complicated pore structure in shales. Therefore, fractal dimension is an effective parameter to reflect the complexity of pore structure and the degree of micropore development in O₃w-S₁l shale.