旅游地学对旅游业可持续发展之积极作用     

景学立  胡永懋 《上海国土资源》2001,(3):58-60

旅游地学对旅游业可持续发展之积极作用至少可在不断发现更新旅游资源和对旅游资源及其生态环境的监测和保护诸方面，有所作为。  相似文献   

大庆油田西部地区地下水动态监测网优化设计   总被引：2，自引：1，他引：2  

秦延军  宋雷鸣  刘梅侠  刘金和 《水文地质工程地质》2001,28(2):21-25

大庆油田地下水动态监测,网（用水文地质定性方法建立）历经30多年的开采，需要进行定量优化设计，本次研究采用卡尔曼滤波技术与地下水流系统确定－－随机性数值模型相耦合的方法，首先对现有监测网进行质量评价，计算结果表明：监测网在漏斗区（地下水集中开采区）应增加监测孔的数目，调整监测孔的位置，为此，我们拟订了6套12个备选方案，从中选取了由88个监测孔组成的监测网，此监测网无论从监测目标上还是经费上都是最优的。  相似文献   

碳酸盐岩红土风化壳主要特征及红土成因探讨—以贵州典型剖面为例   总被引：12，自引：0，他引：12  

李景阳  朱立军  梁风 《水文地质工程地质》2001,28(5):7-11,16

本文总结提出了碳酸盐岩风化壳成因证据及其演化特点，对风化壳红土成因进行了讨论。  相似文献   

合成平面波数据的Rytov近似叠前深度偏移   总被引：6，自引：0，他引：6  

陈生昌  曹景忠  马在田  同济大学 《物探化探计算技术》2001,23(3):193-198

作者把Berkhout(1992)提出的合成平面波技术应用于线性Rytov近似叠前深度偏移，提高了波动方程叠前深度偏移的计算效率。通过在Marmousi模型数据试验，我们认为在达到基本相同成像效果的条件下，利用合成平面波技术的波动方程叠前深度偏移相对于基本共炮集数据的波动方程叠前深度偏移可提高计算效率约10倍。  相似文献   

铀矿地质档案计算机管理的安全与技术分析     

陈晶 《铀矿地质》2001,17(6):377-379

通过对铀矿地质档案现状与技术安全分析，以及考虑经济因素，铀矿地质档案计算机管理应以磁存储技术和光盘存储技术相结合，采用档案修复和转化技术完成档案的介质转化存储，实现了电子档案管理。  相似文献   

天然锰钾矿吸附水溶液中Hg^2＋的实验研究   总被引：6，自引：3，他引：6       下载免费PDF全文

郑德圣  鲁安怀  秦善  姜浩  郑喜珅  赵谨 《岩石矿物学杂志》2001,20(4):559-564

利用粉碎分级的天然锰钾矿去除水溶液中Hg^2 的实验研究表明：反应平衡时间约为20小时；pH值对其吸附率影响很大，在中性（氯化物在偏碱性）条件下吸附率较高；溶液中阳离子的存在会产生竞争吸附而降低对Hg^2 的吸附量，2价金属离子较1价金属离子对Hg^2 竞争干扰明显；溶液中Cl^-的存在能明显降低对Hg^2 的吸附量。对等温吸附曲线的回归分析得出在浓度为5～350mg/L段能很好地符合Langmuir单吸附位吸附曲线，并计算出在该实验条件下其最大理论吸附量为27.6mg/g。解吸实验结果表明，在无其他电解质参与的条件下解吸量较少，受多种电解质干扰时其解吸率不超过20%。  相似文献   

缅甸含硬玉的蛇纹石化橄榄岩及其围岩的岩石学研究   总被引：13，自引：6，他引：13  

施光海  崔文元等 《岩石学报》2001,17(3):483-490

以缅甸帕敢地区含硬玉岩的蛇纹石化橄榄岩及其围岩－未细分的变质岩为研究对象，较详细地研究了各类岩石的岩相学，岩石化学及主要矿物的组成，认为该区超基性岩为含铬铁矿的蛇纹石化纯橄岩，它的围岩由含多硅白母蓝闪石片岩，石榴斜长角闪岩，大理岩及透辉石大理岩，石英岩等构成。通过其中典型的变质反应分析与计算，认为围岩的变质程度分别为蓝闪石片岩相和的高角闪岩相，其中蓝闪石片岩相的压力大于0．8－1．0GPa，斜长角闪岩相的温度为582度，通过对比分析世界上不同产地硬玉岩的特征，认为硬玉岩，尤其是优质者，产出环境如下：（1）容矿岩体属超基性岩，以含铬铁矿的纯橄岩为最佳；（2）围岩中存在低温高压变质岩，即蓝闪石片岩－榴辉岩类；（3）位于与俯冲带有关大地构造单元内。  相似文献   

绿片岩力学性质的实验研究     

顾芷娟  潘裕生  周勇  陶京玲  刘成龙 《现代地质》2001,15(4):450-452

绿片岩的力学实验表明 ,在围压 45 0MPa条件下 ,岩石约于 45 0℃开始塑性变形。温度升至 5 5 0℃时变形加剧 ,原来直径为 10mm、高 2 0mm的均匀圆柱体变成直径为 10 8mm、高 17 4mm、中部变粗的不规则柱体。这一结果为解释青藏高原的地壳加厚提供了一定的实验依据  相似文献   

Study on the relationship between geothermal exploitation and seismic activity in Xi’an region     

Wu Fu-chun  Song Li-sheng  Zhu Xing-guo  Wang Feng  Jing Bei-ke  Dong Xing-hong  Fang Wei  Zuo Yong-qing 《地震学报(英文版)》2001,14(4):434-439

Based on the analysis of the induced earthquakes in China and abroad, we get some ideas about earthquakes induced by pumping water out of a well or injecting water into a well. The induced earthquakes usually occur near the well, and they are generally small earthquakes. The earthquake sources are shallow, and they belong to the main shock-after shock type of earthquake or the swarm-type of earthquake. The magnitude and the quantity of the induced earthquakes obviously depend on the pressure and the quantity of water pumped or injected. These earthquakes happen as soon as pumping or injecting occurrence, or after ten or twenty days, they may occur at the time of injecting mud or injecting high pressure water when a well is being drilled, or at the time when the ground water is being normally exploited. A large quantity of hot water has been exploited since 1990 in Xi’an, and the quantity of water exploited has been increasing year by year, as a result the groundwater level has been dropping with the water pumped out and the water level is high in summer and low in winter. The earthquakes in Xi’an region belong to the solitary-type and they spread outside Xi’an city where the wells are concentrated but no earthquake happens. The seismic frequency and the energy released have no relation with the quantity of water exploitation or the water level in the well. It is considered that geothermal exploitation does not induce earthquakes in and around Xi’an because of its specially geological condition. Foundation item: Project sponsored by the Landslide Office of Shaanxi Province and Society of Disaster Reduction of Shaanxi Province.  相似文献   

The Upper Permian Sedimentary Facies and Its Role in the Dajing Cu-Sn Deposit, Linxi County, Inner Mongolia, China   总被引：3，自引：1，他引：3  

Gongjiong QIN  Yosuke KAWACHI  Liqing ZHAO  Yongzheng WANG  Qiang OU 《Resource Geology》2001,51(4):293-305

Abstract: Exhaustive investigations were launched for confirming the upper Permian host rocks of the Dajing Cu-Sn Deposit, probing into the possibility that Dajing is a Sedex type deposit during cosedimentation, complementing the deficiency of previous researches and going further into substantiating the role of the upper Permian strata in the control of ore distribution. After more than two years work, we reclassified the sedimentary facies in the Dajing area and its periphery as shallow fresh water lake and delta. Indicative sedimentary structures, such as ripple marks, rain marks, and mud cracks combined with contemporary fossils, were revealed. Having measured the flow directions, performed chemical comparison, and analyzed various sediments from sourceland in the Dajing area by XRF, we consequently redivided the strata into four sedimentary members, among which P₂l₁ and P₂l₂ were concluded as significant ore-hosted strata. The upper Permian basin was a lateral rift basin. The water and sediments in the basin are much deeper and thicker in the north than those in the south.
The indicators of special sedimentary facies, such as gravity flow, brine pool and synchronogenic stratiform structure of the ore cannot be found in the Dajing area. There was no growth fault, assemblage of sulfide and sulfate, and no zonation as well.
On the basis of study in this area, taking into account the paleosedimentary environment as capriciously flowing shallow lake, which approximated the state of oxidation, we figured that the paleogeography made it prohibitively difficult to form stratiform sulfide deposits which are prone to form in deoxidized environment. It can be ruled out the possibility that the Dajing deposit is a syngenetic deposit during sedimentation.  相似文献