The retrieval of two-dimensional distribution of the earth''''s surface aerodynamic roughness using SAR image and TM thermal infrared image     

ZHANG Renhua  WANG Jinfeng  ZHU Caiying    SUN Xiaomin & ZHU Zhilin .Institute of Geographical Sciences  Natural Resources  Chinese Academy of Sciences  Beijing  China  .Institute of Surveying  Mapping  Information Engineering University of the Chinese People''''s Liberation Army  Zhengzhou  China 《中国科学D辑(英文版)》2004,47(12):1134-1146

The research for the land surface fluxes has madea quiet great progress for its breakthroughs in the fieldof regional or global interactions between land surfaceand atmosphere. However, many remote sensing mod-els for estimating the land surface fluxes need the pa-rameters of surface momentum, heat, resistance ofwater vapor at a referenced height, which are the func-tion of aerodynamic surface roughness zad. It hasbeen validated that the retrieval of the land surfacefluxes is very sensitive to…  相似文献   

Estimation on dynamic release of phosphorus from wind-induced suspended particulate matter in Lake Taihu   总被引：16，自引：4，他引：12  

FAN Chengxin  ZHANG Lu    QIN Boqiang  WANG Sumin  HU Weiping & ZHANG Chen . Taihu Lake Laboratory for Ecosystem Research  Nanjing Institute of Geography & Limnology  Chinese Academy of Sciences  Nanjing  China  . Graduate School of Chinese Academy of Sciences  Beijing  China 《中国科学D辑(英文版)》2004,47(8):710-719

The internal source, especially resuspension process of the sediments in lakes and its environ- mental effect has been paid shining attention in the West as well as in China[1—6] although the influence of external source is important to water environment[7]. S鴑dergaard et al. compared the releases of soluble reactive phosphorus (SRP) in the surface sediments of Lake Arres before and after disturbance and they found that disturbing can increase the release by 20—30 times[3]. Robarts and ot…  相似文献   

江西相山铀矿田遥感影像呈现的新构造运动及其意义   总被引：9，自引：0，他引：9  

张万良  刘德长  李子颖  张静波 《国土资源遥感》2005,16(3):52-56

通过Landsat 7 ETM+多光谱数字图像融合，对相山矿田的地表岩性、地貌景观及线环影像进行分析，共解译出NE向、NNW向、NWW向、SN向和EW向5组线性构造， 这些线性构造具有多期次活动的特点，其中NE向线性构造F2在第四纪的活动，使相山矿田北西部相对于南东部陷落，形成北西、南东两个各具特色的影像区，南东影像区剥蚀程度较大，北西影像区更适合找矿。  相似文献   

Sorption behavior of U(VI), ~(234)U(VI) and ~(238)U(VI) onto fracture-filling clays in Beishan granite, Gansu: Application to selecting the site of high-level radwaste repository in China     

MIN Maozhong    LUO Xingzhang  WANG Ju  JIN Yuanxin & WANG Rucheng . Department of Earth Sciences  State Key Laboratory of Mineral Deposit Research  Nanjing University  Nanjing  China  . Center of Materials Analysis  Nanjing University  Nanjing  China  . Department of Environmental Science  Engineering  Nanjing University  Nanjing  China  . Beijing Geology Institute  Nuclear Industry  Beijing  China 《中国科学D辑(英文版)》2005,48(10)

Knowing the transport of uranium and radionu-clides through the environment is important for as-sessing the risk posed by long-term disposal of rad-waste. Granitic rocks have been selected as a host-rock type for the first high-level radwaste repository in China. According to the Chinese High-level Rad-waste Management Program, high-level radwaste (HLW) will be buried at 800―1000 m depth in a granitic pluton in Northwest China and, specifically, in the A granitic complex of Beishan area,…  相似文献   

Relationships between bacterial-algal proliferating and mass extinction in the Late Devonian Frasnian-Famennian transition: Enlightening from carbon isotopes and molecular fossils     

GONG Yiming    XU Ran  TANG Zhongdao  SI Yuanlan & LI Baohua . Faculty of Earth Science  State Key Laboratory of Geological Processes  Mineral Resources  China University of Geosciences  Wuhan  China  . Institute of Resources & Environments  Henan Polytechnic University  Jiaozuo  China  . Department of Computer Science  South-Central University for Nationalities  Wuhan  China  . Laboratory of Marine Geology  Tongji University  Shanghai  China 《中国科学D辑(英文版)》2005,48(10)

The five major mass extinctions which occurred in the transition of the Ordovician-Silurian (440 Ma), Late Devonian Frasnian-Famennian (F-F) (370 Ma), Permian-Triassic (250 Ma), Triassic-Jurassic (205 Ma) and Cretaceous-Paleogene (65 Ma) are significant phenomena in the Phanerozoic global environment and organic evolution. Their corresponding extinction rates of marine invertebrate at the level of genus and family are 60% (genus) and 26% (family), 57% and 22%, 82% and 51%, 53% and 22%, …  相似文献   

Combination of drainage, water supply and environmental protection as well as rational distribution of water resource in Zhengzhou mining district     

WU Qiang  LI Duo    DI Zhiqiang  MIAO Ying  ZHAO Suqi & GUO Qiwen . Resource Exploitation Engineering College  CUMT  Beijing  China  . Shijiazhuang Engineering College  University of Economics  Shijiazhuang  China  . Shenyang Institute of Geology  Mineral Resources  Shenyang  China  . State Adminstration of Coal Mine Safety  Beijing  China  . Zhengzhou Coal Mine Company 《中国科学D辑(英文版)》2005,48(10)

It is forecasted that before the 2050s, coal would still make up 50%-60% of once energy constitution in China, but unfortunately, in most part of our coal districts and peripheral regions, we generally face the contradiction and conflict among the threat of water hazard, shortage of water resource and environmental protection, which are becoming more and more serious especially with a gradual increase in mining depth of the shaft and recovery of lower coal beds. The concrete expression is as f…  相似文献   

Ultrahigh pressure (>7 GPa) gneissic K-feldspar (-bearing) garnet clinopyroxenite in the Altyn Tagh, NW China: Evi- dence from clinopyroxene exsolution in garnet   总被引：13，自引：0，他引：13  

LIU Liang    CHEN Danling  ZHANG Anda  SUN Yong  WANG Yan  YANG Jiaxi  & LUO Jinhai . Key Laboratory of Continental Dynamics of the Ministry of Education of China  Northwest University  Xi’an  China  . College of Earth Science  Land Resources  Chang’an University  Xi’an  China  . The Laboratory of Orogen  Basin of the Ministry of Education  Peking University  Beijing  China 《中国科学D辑(英文版)》2005,48(7)

Since the ultra-high pressure metamorphic rocks with coesite and diamond indicators,which are formed under the condition of deep-subduction of continental crust,have been recognized[1―4],exsolution structures of the ultra-high pressure minerals such as pyroxene,olivine,garnet and sphene in the various kinds of rocks have attracted the great interests and attention of many researchers[5―18].Some exsolution structures,such as clinopyroxene+rutile+apatite[13]or quartz+rutile+apatite[15]exsolutio…  相似文献   

地幔柱假说及地质意义     

王少怀   《地质找矿论丛》2005,20(8):1-6

文章介绍了地幔柱理论研究的一系列进展，诸如地幔柱特征、动力学模式及其地质意义。在重力分异过程中，随着地球质量不断向地心集中，地球自转动能也不断向地核集中，从而产生圈层分化和差异旋转。地核相对地壳、地幔高速旋转，具有巨大动能，旋转阻力不断将其转化为热能，在核幔边界聚积起来，为液核对流和热幔柱提供足够的能量。核幔边界是产生热幔柱的位置。阐明了地幔柱构造与板块构造的关系。地幔柱理论涉及地幔深部物质垂直运动的机制，对了解地球深部动力学机制有重大意义。  相似文献   

中国天山-北山地区晚古生代岩石地层系统厘定及沉积环境分析   总被引：2，自引：0，他引：2  

王洪亮  何世平张二朋徐学义陈隽璐 《地层学杂志》2005,29(11):541-547

通过编制天山一北山地区地质图对该区晚古生代岩石地层系统进行了重新厘定，并初步分析了这一地区晚古生代不同阶段的沉积环境，论述了晚古生代时天山与北山应属于同一沉积构造区的地层结构与沉积特征证据。  相似文献   

西藏林芝地区第四系新知   总被引：3，自引：0，他引：3  

尹光侯  张留青包钢包俊跃段国玺苏学军 《地层学杂志》2005,29(11):626-630

对西藏林芝米林盆地的更新世及其以后的沉积进行了调查研究，磁性地层分析表明这些湖积物的历史不到4万年，在米林的古湖泊沉积物中采获Polypodiaceae等晚更新世孢粉，于米林县白过多更新世湖积之上全新统冲积中新发现林芝智人的头盖骨、牙齿及石斧等，为研究青藏高原第四纪地质作用和古环境、古气候变化及古人类活动等提供了新资料。  相似文献