黄骅坳陷埕北断坡不整合特征与油气成藏   总被引：2，自引：0，他引：2       下载免费PDF全文

吴孔友  查明  肖敦清  袁淑琴 《古地理学报》2008,10(5):545-554

黄骅坳陷埕北断坡处于歧口凹陷向埕宁隆起过渡的斜坡带上,发育多个不整合,这些不整合对该区的油气成藏起重要作用。利用地震资料,在剖面上将不整合划分为5种类型：褶皱不整合、断褶不整合、削截不整合、超覆不整合、平行不整合。其中平行不整合分布在凹陷区,褶皱不整合分布在基底,断褶不整合分布在大断裂下降盘,削截不整合分布在大断裂上升盘,而超覆不整合多分布在隆起斜坡区;利用测井资料,在纵向上将不整合划分为3层结构：不整合面之上岩石、风化粘土层及半风化岩石,由于每层结构的岩性与厚度不同,形成ACE型、ADE型、BCE型和BDF型4种岩性配置模式。不整合构成埕北断坡油气侧向运移的重要通道,同时在其之上形成超覆不整合油气藏,在其之下依靠风化粘土层遮挡形成削截不整合与褶皱不整合油气藏。勘探证实,研究区众多油气显示或油气藏均位于不整合面上、下50 m范围内。开展不整合与油气成藏关系研究,将拓宽黄骅坳陷隐蔽油气藏的勘探空间,对我国东部油气资源挖潜具有重要的理论与实践意义。  相似文献   

基于四叉树的LiDAR点云数据组织研究     

陈刚  张芯  张明  石宏斌 《测绘通报》2008,(11)

针对传统的数据读取方法不能满足LiDAR点云数据量大的特点,基于Windows的内存映射机制,研究LiDAR点云数据组织,利用四叉树对LiDAR点云数据进行索引管理,并在LiDAR点云的三维场景绘制中对点云数据进行剪裁,减轻CPU的负担,提高其运算的效率.  相似文献   

渤海湾盆地埕岛油田缝洞型潜山油气藏构造及储层特征   总被引：1，自引：0，他引：1  

付兆辉  陈发景  刘忠胜  张卫平  程明  张在振 《海相油气地质》2008,13(1):37-44

埕岛油田古潜山油气藏为典型的缝洞型碳酸盐岩油气藏。埕岛地区经历了多期次的构造运动,并经受了多期次的断裂与剥蚀作用,为油气成藏创造了良好条件。埕岛油田古潜山可以划分为三个构造单元,即埕北20断层下降盘的西排山,上升盘的中排山和东排山,三个潜山带成帚状敛于凸起最南端,为几个二级构造单元交汇处,构造应力较发育。埕岛油田有三种储集空间类型:晶间孔隙、溶蚀孔洞和裂缝。  相似文献   

Study on the Geotherm-forming Geological Condition in the Yishu River Fault Zone     

YANG Qi-jian  YANG Ming  LI Ning 《华北地质》2008,31(3)

  相似文献   

氧化锰矿物的生物成因及其性质的研究进展   总被引：5，自引：0，他引：5  

刘凡  冯雄汉  陈秀华  邱国红  谭文峰  贺纪正 《地学前缘》2008,15(6):66

土壤中的氧化锰矿物是原生矿物风化和成土过程的产物,是最具反应活性的一类矿物,决定着环境中许多物质的形态、迁移和转化,在元素生物地球化学循环中起着重要的作用,其形成机制和环境效应备受关注。已有的研究表明,环境中氧化锰的形成与微生物作用紧密相关,微生物作用可使自然环境中的Mn(Ⅱ)氧化速率提高105倍。参与Mn(Ⅱ)氧化的微生物在环境中广泛存在,已知的典型锰氧化细菌分布在变形菌门、放线菌门或厚壁菌门,它们均通过胞外聚合物中的多铜氧化酶来催化氧化Mn(Ⅱ)。细菌氧化Mn(II)成Mn(Ⅳ)是酶催化的两个连续的快速单电子传递过程,Mn(Ⅲ)在溶液中以与酶结合的瞬时中间态出现。生物形成氧化锰的最初形态为层状锰矿物,与δ-MnO2或酸性水钠锰矿很类似,且结晶弱,粒径小,锰氧化度高,结构中的八面体空穴多,因而比化学形成的氧化锰具有更强的吸附、氧化等表面活性。环境中Mn(Ⅱ)微生物氧化及形成的Mn(Ⅲ)中间体与碳、氮、硫等生命元素的地球化学循环的关系令人关注。  相似文献   

城市三维可视化快速建模与浏览系统的研究   总被引：1，自引：0，他引：1  

李明  刘桂生  李楠 《现代测绘》2008,31(3)

随着信息时代的到来,虚拟现实做为信息技术发展重要驱动力越来越多地应用到城市建设领域中来。本文分析了虚拟现实技术如何在城市尺度上进行快速建模和浏览,并通过具体案例对该技术进行了详细的阐述。  相似文献   

化探背景与异常划分中的C型转换法     

陈明  范继璋  矫希国 《吉林大学学报(地球科学版)》1996,(2)

化学背景与异常在统计学上的差异同时表现在浓度和变差两个方面。在划分背景与异常时,把这两方面信息提取出来并作显化处理,使背景与异常的差别更大,以利划分,这就是Ｃ型转换的基本思想。介绍了Ｃ型转换法的基本原理及其在条件模拟和实际金矿区中的应用。  相似文献   

A planetary boundary-layer numerical model containing third-order derivative terms     

Zhao Ming 《Boundary-Layer Meteorology》1994,69(1-2):71-82

In this paper, the third-order derivative of velocity with respect to height is included in the traditional motion equations of the neutral PBL. The nonlinear equations are solved numerically to obtain the vertical distribution of wind in the PBL and some PBL characteristic parameters. Reasonable simulations of the Leipzig wind profile using these parameters show the success of this kind of nonlocal closure in a real PBL simulation.  相似文献   

Information structure analysis for quantitative assessment of mineral resources and the discovery of a silver deposit     

Wang  Yutian  Tan  Bingqi  Wang  Yifeng  Wu  Jiangtao 《Natural Resources Research》1994,3(4):284-294

We propose an information-structure-analysis (ISA) method to quantify the correlations between quantitative and qualitative variables as well as within each type of variable. This method is applied to the evaluation of mineral resources in the western Zheijiang Province of China. The district contains a number of silver-bearing Fe–Cu–Pb–Zn mineral deposits near igneous complexes and FeCuPbZn zones away from the complexes. Silver anomalies occur not only in the known Fe–Cu–Zn–Pb deposits, but also in the country rock, suggesting the possible existence of silver deposits far from the igneous complexes.The tonnage distribution of silver is modeled by Monte Carlo simulation. This simulation is conducted on the basis of the correlations between silver (Ag) and lead (Pb), since no known data on silver is available. The known tonnage distribution of lead in 11 control cells was used to approximate the tonnage distribution of silver in the Monte Carlo simulation. With ISA and Monte Carlo methods, the total amount of potential polymetallic resources in 49 cells in the western Zhejiang Provice is predicted. Significantly, a deposit with about 24 tonnes of silver has been found within our exploration target area.  相似文献   

China's small town urbanization program: Criticism and adaptation     

Tan KC 《GeoJournal》1993,29(2):155-162

China's 12,000 designated towns and more than 40,000 rural market towns have experienced a major transformation since the institution of rural reforms in the late 1970s. Rural industrialization based on the concept of leaving the soil but not the village, entering the factory but not the town has contributed to the revitalization of many small towns. But this rural urbanization has also brought about a number of problems in the countryside, leading many to propose the adoption of the concept ofleaving the soil and the village as another basis of China's small town urbanization. This essay attempts to examine this transformation, particularly the recent criticism and adjustment made to the small town urbanization program.  相似文献