莱芜市主要地质灾害特征易发区划分及防治措施     

苏宝成  周广海  鲁峰  安如意 《山东地质》2014,(3):65-68

该文总结了莱芜市地质灾害的总体特征,同时具体分析了各种地质灾害的类型、地理分布和主要影响因素等个体特征。以截至2012底的数据为依据,采用地质灾害综合危险性指数法,对莱芜市地质灾害易发程度进行综合分区评价,划定了莱芜市地质灾害高易发区、中易发区、低易发区和不易发区,针对不同的地质灾害种类提出了相应的防治措施。  相似文献   

山东岱崮地貌研究综述     

丁新潮  ;徐树建  ;倪志超 《山东地质》2014,(11):32-35

岱崮地貌是继岩溶地貌、丹霞地貌、张家界地貌、嶂石岩地貌之后的中国第5种岩石地貌,作为一种新命名的地貌类型,岱崮地貌具有极大的美学价值和科研价值。但对其的研究和开发却相对滞后。该文介绍了岱崮地貌的研究现状、分布及其形成过程、发育阶段等,岱崮地貌的分布规律、形态特征、组成结构,其演变趋势与模式及其形成机制等,是其学术研究的核心问题。加强对岱崮地貌的研究,不仅能够改变地貌学中关于方山研究的薄弱局面,丰富大陆风化及陆地碳循环研究,而且可深化对沂蒙山区地质地貌条件、生态环境特点的认识,也可为申报国家地质公园和世界自然遗产提供科学支撑。  相似文献   

山东省地理信息公共平台县级节点建设探讨     

潘宝昌  ;张金盈  ;李琳  ;范维峰 《山东地质》2014,(11):63-66

山东省地理信息公共服务平台由省市县三级节点构成,地理信息公共平台县级节点技术构架与省市构架相统一,方便省市县互相联通。通过地理信息公共平台县级节点技术网络硬件体系建设、框架数据结构,以门户网站为统一访问界面,对外提供数据服务接口和功能服务接口,通过调用平台提供的功能接口,快速构建业务应用系统,实现省、市、县互联互通。  相似文献   

省级国土资源“一张图”数据中心建设探讨     

冯永玉 《山东地质》2014,(11):67-70

从国土资源“一张图”数据中心亟待解决的问题入手,结合山东省国土资源数据中心建设实际,从国土资源数据建设的宏观和规划层面,探讨国土资源“一张图”数据中心的定位、与国土资源各业务系统的关系和科学合理的建设步骤等方面问题,为构建覆盖“横向到边、纵向到底、联动更新、资源共享”的国土资源“一张图”数据中心提供理论支撑。  相似文献   

青海省裕龙沟地区水系沉积物地球化学特征及找矿方向     

魏印涛  ;何其芬  ;陈宏杰  ;刘伟  ;寇雅威  ;刘彦奎 《山东地质》2014,(12):38-41

在1∶5万水系沉积物测量的基础上,对青海省共和县裕龙沟地区的地球化学特征进行了初步分析,对元素分布特征、元素的富集离散特征、元素相关性分析、异常元素组合特征进行了研究,并对工区圈定的综合异常按元素进行了排序,初步了解了工区的地球化学特征,发现 Cu,Ni,Pt,Pd,Au 为区内具有成矿潜力的元素。划分出裕龙沟外围、欧角北、谢日陇、勒陇、锐山5个找矿靶区,为下一步的地质找矿工作指明了方向。  相似文献   

Geochemistry of Early Cretaceous calc-alkaline lamprophyres in the Jiaodong Peninsula: Implication for lithospheric evolution of the eastern North China Craton     

《Gondwana Research》2014,25(2):859-872

Mesozoic lamprophyres are widely present in gold province in the Jiaodong Peninsula. In this study, we analyzed major and trace elements and Sr–Nd–Pb isotopic compositions of lamprophyres from the Linglong and Penglai Au-ore districts in the Jiaodong Peninsula, in an attempt to better understand Mesozoic lithospheric evolution beneath the eastern North China Craton. These lamprophyre dikes are calc-alkaline in nature, and are characterized by low concentrations of SiO₂, TiO₂ and total Fe₂O₃, high concentrations of MgO, Mg# and compatible element, enriched in LREE and LILE but variably depleted in HFSE. They display initial ⁸⁷Sr/⁸⁶Sr ratios of 0.709134–0.710314, ε_Nd(t) values of − 13.2 to − 18.3, ²⁰⁶Pb/²⁰⁴Pb of 17.364–17.645, ²⁰⁷Pb/²⁰⁴Pb of 15.513–15.571 and ²⁰⁸Pb/²⁰⁴Pb of 37.995–38.374. Interpretation of elemental and isotopic data suggests that the Linglong and Penglai lamprophyres were derived from partial melting of a phlogopite- and/or amphibole-bearing lherzolite in the spinel–garnet transition zone. The parental magma might have experienced fractionation of olivine and clinopyroxene, and minor crustal materials were incorporated during ascent of these mafic magmas. Before ~ 120 Ma of emplacement of these calc-alkaline lamprophyres, the ancient lithospheric mantle was variably metasomatized by hydrous fluids rather than melts from subducted/foundered continental crust. It is proposed that continuous modification by slab-derived hydrous fluids from the Paleo-Pacific plate converted the old cratonic lithospheric mantle to Mesozoic enriched lithospheric mantle. Geodynamic force for generation of these lamprophyres may be related to large scale lithospheric thinning coupled with upwelling of the asthenosphere beneath the North China Craton. Continental arc-rifting related to the Paleo-Pacific plate subduction is favored as a geodynamic force for the cratonic lithosphere detachment.  相似文献   

Multiple scales in auroral plasmas     

《Journal of Atmospheric and Solar》2002,64(2):211-229

A review of the observed space scales of the auroral features ranging from the whole auroral oval of bright discrete forms down to the nonlinear moving solitary structures with the scales of the order of Debye length is given. The characteristic physical scale which determines the generation process is indicated whenever possible. Some problems of the auroral theory and modeling are briefly discussed, and a cross-scale coupling between the auroral and magnetospheric altitudes is stressed. It becomes apparent that the first in situ studied real astrophysical plasma object—the Earth's magnetosphere/ionosphere/aurora—is a unified multi-scale system which seems to be ordered at large scales, but sometimes looks as nearly nondeterministic, or chaotic, at small scales. The most powerful processes in this system operate in a very wide range of scales, with multifarious cross-scale couplings. The statistical behavior of magnetospheric/auroral plasmas in the regions of active auroras often can be reasonably described as the near-critical state.  相似文献   

Technical Note     

《Computers and Geotechnics》2003,30(1):IFC

  相似文献   

2013年中国矿产品供需形势     

郭娟  ;崔荣国  ;徐桂芬  ;王卉  ;林博磊 《国土资源情报》2014,(4):2-6

2013年,中国矿产品供应能力不断增强,矿产品需求继续保持增长。全国一次能源生产总量为34.0亿吨标准煤,增长2.4%;消费总量37.5亿吨标准煤,增长3.7%;能源自给率为90.7%。煤炭产量36.8亿吨,进口量超过3亿吨;原油产量2.09亿吨,原油进口量2.82亿吨;铁矿石产量14.5亿吨,进口量超过8亿吨;黄金产量428.2吨,消费量1176.4吨,首次超过印度居世界第一。  相似文献   

遥感图像融合方法在机场识别应用中的研究          下载免费PDF全文

因倩  张占睦  曲筱筱  冯颖 《海洋测绘》2010,30(2):38-41

针对利用光谱特性和几何结构特性可以提高机场识别效率和鲁棒性的理论,对像素级遥感图像融合方法进行了分析比较,并对融合结果进行了针对性的效果评价。实验结果表明,小波变换融合法和高通滤波融合法在继承光谱信息和增强边缘特征方面有一定的优势,能够为机场识别提供信息丰富的图像数据基础。  相似文献