浅论多旋回构造理论对第四纪深部物理运动研究的推动          下载免费PDF全文

杨科佑 《第四纪研究》1996,16(3):272-276

第四纪最突出的事件是青藏高原和南海海盆的形成和演化。众多中外学者几乎一致认为，青藏高原的形成是由于印度克拉通向北的推动，南海等西太平洋边缘海是在太平洋板块和菲律宾海板块向西俯冲的过程中形成的。笔者另辟蹊径，提出，由于新生代(尤其是第四纪)以来两个相互交切的东亚断裂和南亚断裂的深部物理运动，使得南海等西太平洋边缘海地区的陆壳物质被逐渐吸入地幔，经转化为“幔源壳质”以后，再不断输送、补充给青藏地区。其结果必然是，南海等西太平洋边缘海地区的陆壳迅速转化为过渡型壳甚至洋壳，青藏地区则由洋壳转化为陆壳，并迅速隆起、增厚。  相似文献   

叶腊石粉理化性能与应用研究     

胡清华 《安徽地质》1996,(1)

本文测试并评价了叶腊石粉理化性能，开展了叶腊石粉在农药杀虫剂、涂料和复合塑料中的应用试验研究，结果表明：试验制品质量指标达到并超过相应要求，叶腊石粉是一种理想的工业用填料（载体）。  相似文献   

基于BOFDA的砂—黏土互层垂向变形物理模型试验研究     

卢毅  宋泽卓  于军  龚绪龙  季峻峰  陆婧  周钢军 《高校地质学报》1997,25(4):481

地面沉降作为一种常见地质灾害对城市发展造成巨大威胁，有效监测土层的垂向变形过程是地面沉降防治的一项重 要工作。文章采用布里渊光频域分析（BOFDA） 技术，利用室内地面沉降模型，对砂—黏土互层土体在排灌水循环中的垂 向变形进行分布式监测，并结合固结压缩试验对土体的垂向变形进行分析。结果表明：黏土层为地面沉降的主要变形层； 在排灌水循环中，土体也会经历压缩—回弹的循环。此外，BOFDA分布式监测技术可以有效地捕捉砂—黏土互层土体在排 灌水状态下的垂向变形情况，实现对地面沉降发育过程中土体垂向变形的实时监测。研究结果可为实现地面沉降的有效防 治措施提供一定的参考依据。  相似文献   

“94.5.2”特大暴雨过程分析     

蒋宗孝 《气象》1996,22(6):25-28

通过分析１９９４年５月１－３日闽西北特大暴雨的环流背景，物理量场，卫星云图和地面尺度系统的特征及其演变，揭示了这场特大暴雨的物理机制和各要素场特征。  相似文献   

    

Shi-Rong Mei 《地震学报(英文版)》1996,9(1):1-12

In this paper, the stress concentration process and the time-space distribution of stress when earthquakes are in preparation in one or more earthquake-generating bodies in a tectonic block have been analyzed and their relation with seismicity and earthquake precursors have been studied. The results show that: 1 When the regional stress field has intensified to a certain level, fracture begins in some block or blocks. The regional stress field will vary with time and the occurrence of strong earthquakes in groups is the result of the evolution of this dynamic stress field. In this process, the existence and development of more than one high stress concentration zone may give rise to a variety of pre-seismic anomaly-to-earthquake relations. 2 The process of stress variation in an earthquake-generating block generally appears as a nonlinear one. After the long-term elastic deformation, there may be more than one time of inelastic deformation and fault-softening from the beginning of the stage of inelastic deformation to just before the main fracture. Corresponding to such a nonlinearity, the stress and strain fields in the earthquake-generating block will display a complex pattern of time-space evolution; and thus the earthquake precursor fields controlled by stress and strain must display complexities in many aspects.  相似文献   

广西高龙金矿地电化学深部找矿研究   总被引：1，自引：0，他引：1  

杜建波  罗先熔  王钟  张小路 《黄金地质》2001,7(3):69-73

地电化学提取法是在动态平衡的原理之上，利用人工电场提取深部或成矿离子进行成矿预测，确定成矿靶区。为节省投入和资源，延长矿山寿命，对广西高龙金矿投入以地电化学提取为主的深部找矿方法来找寻延深或下伏矿体。通过对地电化学提取异常和其他物化探异常的综合分析，确定高龙金矿鸡公岩矿段具有一定的找矿潜力，并再次证明了地电化学提取法找寻深部隐伏矿的有效性及其探测深度。  相似文献   

A Numerical Simulation of the Seasonal Cycle of Temperature, Salinity and Velocity Fields in Tokyo Bay     

Fumio Horiguchi  Joji Yamamoto  Kisaburo Nakata 《Marine pollution bulletin》2001,43(7-12):145-153

To understand when oxygen-depleted waters occur, how they develop and when they dissipate in inner Tokyo Bay, realistic simulations were attempted with fine spatial and temporal resolution by applying realistic time dependent external forcing. A 3D hydrodynamic model was driven by time-dependent external forcing factors/parameters such as solar radiation, air temperature, relative humidity, wind velocity, and fluvial discharge, under the open boundary conditions of 1995. A simulated time series of salinity and temperature agreed fairly well with observed data, except in summer. The model failed to reproduce the development of the surface mixed layer in summer. Several sensitivity analyses on the external forcing parameters such as wind velocity and vertical diffusivity were conducted to reproduce the mixed layer. However, changing these parameter values did not improve the model results.  相似文献   

Operational Monitoring and Forecasting in the Aegean Sea: System Limitations and Forecasting Skill Evaluation     

K. Nittis  V. Zervakis  L. Perivoliotis  A. Papadopoulos  G. Chronis 《Marine pollution bulletin》2001,43(7-12):154-163

The POSEIDON system, based on a network of 11 oceanographic buoys and a system of atmospheric/oceanic models, provides real-time observations and forecasts of the marine environmental conditions in the Aegean Sea. The buoy network collects meteorological, sea state and upper-ocean physical and biochemical data. The efficiency and functionality of the various system components are being evaluated during the present pre-operational phase and discussed in this paper. The problem of bio-fouling on optical and chemical sensors is found to be a main limitation factor on the quality of data. Possible solutions to this problem as well as quality control methods that are being developed are also described. Finally, an evaluation of the numerical models is presented through the estimation of their forecasting skill for selected periods.  相似文献   

松南八屋油气田储层物性参数与油气储集关系研究     

谢大进  孙正义  王桂萍 《吉林大学学报(地球科学版)》2001,31(3):247-250

在八屋油气田 ,储层的物性参数随深度呈较强的指数规律变化 ,且在T4 界面附近出现较明显的特点 ,不仅反映了T4 界面上下地层的压实情况和储层的含油气性 ,也反映了不同地层中含油气储层物性界限值的复杂函数变化趋势。油气运移时总是优先储集在物性条件相对较好的储层中 ,同时储层的油气产能与孔隙度和渗透率都是成正比的 ,而T3 界面附近的储层物性条件相对最好 ,是油气储集的最佳场所 ,所以应将登娄库组的小Ⅰ至小Ⅲ和泉一段的农Ⅷ油气层作为重点开发层系  相似文献   

储层物性的空间结构特征分析与预测—以青海尕斯库勒油田E3^1油藏为例          下载免费PDF全文

潘懋  李铁锋 《地质学报》2001,75(1):121-126

储层物性受诸多地质因素的影响，经常表现出强烈的非均质性。这种非均质性在一定的空间尺度上往往具有明显的结构特点。本文以青海尕斯库勒油田E3^1油藏为例，讨论了地质统计学方法在油田储层特性空间结构特征分析与预测中的应用。采用变异函数定量描述了孔隙度和渗透率的空间分布结构特征，并在此基础上利用克立格法进行了最成插值预测。结果表明，研究区储层物性（孔隙度和渗透率）具有显著的空间结构性特点，变程一般在800－2000m之间；不同小层的储层物性具有不同的空间结构方向性。这种特征主要沉积相带空间展布的影响，各小层孔隙度和渗透率的实验半变异函数均可用具有块金效应的球状模型来拟合并进行预测。作为验证，本文还采用“多重趋势面”预测模型对储层的孔隙度和渗透率进行了预测分析。  相似文献