关于基层地质档案管理人才培养的几点思考     

朱萍 《四川地质学报》2005,25(3):183-185

当今档案管理已进入信息化时代,新一代档案人员对一些技术规范、操作方法和工作流程还不很熟悉,对岗位的重要性认识不足,因此要强调对基层档案管理人才的培养,使之尽快适应新时期档案工作的实际需求。  相似文献   

斑岩型钼矿激电测深的找矿模式   总被引：4，自引：2，他引：2  

施俊生  殷建武  李清林 《CT理论与应用研究》2006,15(3):17-20

近年来在新县吴陈河风响山钼(金、银)矿区开展地质和物探普查,发现了明显的激电异常。经钻探验证,揭示了风响山钼矿化带,得出了斑岩型钼矿“三位一体”——构造、斑岩体、激电异常的找矿模式。  相似文献   

临沂市土地可持续利用评价研究          下载免费PDF全文

密长林 《山东国土资源》2006,22(6):113-118

从资源合理性、经济可行性、社会可接受性3个方面，建立了土地可持续利用综合评价指标体系。采用层次分析法确定了指标权重，应用模糊数学中的隶属函数对指标体系中的各项指标进行无量纲化处理，然后用加权法求得临沂市1995--2004年的土地可持续利用水平，用协调度模型求得临沂市土地可持续利用的协调度，运用障碍度模型，分析了各项指标的障碍度。  相似文献   

Comprehensive Assessment of Seawater Quality Based on an Improved Attribute Recognition Model   总被引：2，自引：0，他引：2  

ZHANG Libing )  )  CHENG Jilin )  JIN Juliang )  *  and JIANG Xiaohong ) ) College of Civil Engineering  Hefei University of Technology  Hefei  P.R.China ) College of Hydraulic Engineering  Yangzhou University  Yangzhou  P.R.China 《中国海洋大学学报(英文版)》2006,5(4):300-304

1IntroductionAssessment of environment quality,which plays ani mportant role in environmental science and engineer-ing,has shiftedfromtraditional qualitative analysis toquantitative calculation.Inrecent years,quite a num-ber of methods have been brought o…  相似文献   

澜沧江某水电站泄洪洞出口边坡稳定性评价     

丁浩江  许模  曾令科  张衡  江凯 《中国地质灾害与防治学报》2007,18(1):5-9

岩土质边坡是一种自然地质体，其稳定性在很大程度上具有不确定性、模糊性。模糊分析是边坡稳定性分析的有效途径之一。文章采用模糊数学分析法，构建了二次模糊综合评判模型，对影响边坡稳定性的诸多因素进行了分类归纳，并根据不同的稳定状态，将边坡划分为5个等级，再结合某水电站右岸泄洪洞出口开挖边坡稳定性的实际问题，利用梯形函数构建了与该边坡稳定性分析相关因素的隶属函数、运用专家评分法确定了各因素的权重，最终对该边坡的稳定性进行了评价。结果表明该评价分析结果与实际相吻合，评价效果较好。  相似文献   

中国大陆及邻区岩石圈地壳三维结构与动力学型式   总被引：8，自引：0，他引：8       下载免费PDF全文

蔡学林朱介寿  曹家敏程先琼 《中国地质》2007,34(4):543-557

通过中国大陆及邻区地震测深剖面的系统构造解析,建立起中国大陆岩石圈地壳厚度与速度结构模型。本文根据地壳厚度与速度结构模型、地壳变形结构样式、地壳地质结构与构造演化、地壳运动学与动力学等四方面标志,将中国大陆岩石圈地壳划分为3类6种地壳结构-动力学型式:克拉通型褶推式结构-挤压动力学型式、克拉通型地垒结构-拉伸动力学型式、增厚型高原扇形结构-碰撞楔入动力学型式、增厚型造山带楔状结构-俯冲楔入动力学型式、减薄型盆岭结构-块体伸展动力学型式和减薄型铲状结构-整体伸展动力学型式。笔者探讨了克拉通型地壳、增厚型地壳和减薄型地壳的基本特征、相互关系及其地质意义。  相似文献   

辽宁省建平县地质灾害调查与防治   总被引：1，自引：0，他引：1  

蔡发田  李祥才  付庆  敖颖锋  蒋振和 《矿产与地质》2007,21(5):594-598

建平县日益突出的地质灾害问题已经成为制约当地社会经济和可持续发展的不利因素。该县地质灾害的有效治理已是摆在建平县政府和人民面前的首要任务。在对建平县地质灾害调查的基础上，提出了该县防治地质灾害的措施和恢复自然生态环境的建议。研究认为，防治地质灾害和恢复自然生态环境的根本途径在于，加大综合治理力度和大力提倡植树种草。  相似文献   

Cenozoic graben facies in the Middle Amur sedimentary basin as inferred from seismic and electrical exploration     

T. V. Merkulova  E. P. Razvozzhaeva 《Russian Journal of Pacific Geology》2007,1(4):335-351

Most of the grabens of the Middle Amur sedimentary basin (MASB) are usually characterized by similar structures typical of continental rifts. Based on models elaborated for the sedimentary infill in well-studied rift basins, seismic facies developed in grabens of the MASB are first analyzed. The analysis revealed seismic facies characteristic of different parts of asymmetrical basins: facies of fans developed on steep slopes and facies of coastal shoals, alluvial plains, and deltas occurring on gentle slopes. Seismic facies peculiar of deep lacustrine settings that are considered promising with respect to oil-and gas-bearing source rocks is recognized. Correlation of seismic and drilling data confirms the correctness of the interpretations and shows that boreholes penetrated a thin sequence of deep-water lacustrine sediments. Using the vertical electrical sounding method, a low-resistivity sequence that is most promising for discovery of lacustrine sediments is defined in the southwestern and eastern parts of the MASB. The lowest values of the specific resistivity in this sequence (7–8 Ohm · m) are recorded in its southeastern part, where a borehole partly recovered a relatively thick silty-clayey sequence.  相似文献   

Three-Dimensional P-Wave Velocity Structure of the Crust of North China   总被引：2，自引：0，他引：2  

魏文博叶高峰  李艳军金胜邓明  景建恩 《中国地质大学学报(英文版)》2007,18(3):257-268

Since the Xingtai (邢台) earthquake in 1966,China Earthquake Administration has carried out a survey campaign along more than thirty deep seismic sounding (DSS) profiles altogether about twenty thousand kilometers long in North China to study the velocity structure of the crust and the upper mantle in this region,and has obtained a great number of research findings. However,these researches have not provided a 3D velocity structure model of the crust of North China and cannot provide seismic evidence for the study of the deep tectonic characteristics of the crust of the whole region. Hence,based on the information from the published data of the DSS profiles,we have chosen 14 profiles to obtain a 3D velocity structure model of North China using the vectorization function of the GIS software (Arc/Info) and the Kriging data gridding method. With this velocity structure model,we have drawn the following conclusions: (1) The P-wave velocity of the uppermost crust of North China changes dramatically,exhibiting a complicated velocity structure in plane view. It can be divided into three velocity zones mainly trending towards north-west. In the research area,the lowest-velocity zones lie in the Haihe (海河) plain and Bohai (渤海) Bay. Although the geological structure of the sedimentary overburden in the study area is somewhat inherited by the upper crust,there are still several differences between them. (2) Generally,the P-wave velocity of the crust increases with depth in the study area,but there still exists local velocity reversion. In the east,low-velocity anomalies of the Haihe plain gradually disappear with increasing depth,and the Shanxi (山西) graben in the west is mainly characterized by relatively low velocity anomalies. Bounded by the Taihang (太行) Mountains,the eastern and western parts differ in structural trend of stratum above the crystalline basement. The structural trend of the Huanghuaihai (黄淮海) block in the east is mainly north-east,while that of the Shanxi block and the eastern edge of the Ordos block is mainly north-west. (3) According to the morphological features of Moho,the crust of the study area can be divided into six blocks. In the Shanxi block,Moho apppears like a nearly south-north trending depression belt with a large crustal thickness. In the southern edge of the Inner Mongolia block and the south of the Yanshan (燕山) block,the Moho exhibits a feature of fold belt,trending nearly towards east-west. In the eastern edge of the Ordos block,the structure of Moho is relatively complex,presenting a pattern of fold trending nearly towards north-west with alternating convexes and concaves. Beneath the Huanghuaihai block,the middle and northern parts of the North China rift zone,the Moho is the shallowest in the entire region,with alternating uplifts and depressions in its shape. For the anteclise zone in the west of Shandong (山东) Province,the Moho is discontinuous for the fault depression extending in the north-west direction along Zaozhuang (枣庄) -Qufu (曲阜).  相似文献   

高频大地电磁测深在断层构造探测中的应用研究   总被引：7，自引：0，他引：7  

欧阳承新  王时平  全德辉  曾建华 《世界地震工程》2007,23(3):138-141

各种大型工程中测区范围内的断层及破碎带构造，都将对施工产生安全隐患，阐述采用EH-4电导率成像系统的高频大地电磁法能够准确快速的探测一定深度范围内的断层及破碎带等地质构造，对施工区的断层及破碎带等地质构造的赋存状态进行超前的宏观预测，并将野外的成功实例进行分析。  相似文献