共查询到10条相似文献，搜索用时 15 毫秒
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The Background Features and Formation of Chemical Elements of Groundwater in the Region of the Middle and Lower Reaches of the Yangtze River 总被引：2，自引：0，他引：2
Zeng Zhaohua Institute of Environmental Geology Jiangxi Bureau of Geology Mineral Resources Nanchang Jiangxi Shang Ruoyun 《《地质学报》英文版》1997,71(1):80-89
The paper deals with the background features, formation and distribution of the chemical el-ements K, Na, Ca, Mg, Si, Fe, Mn, Cr, Ni,V, Co, Ti, Mo, Cu, Pb, Zn, As, Hg, Cd, Be, Li, Sr, B,F, Cl, Br and I in the groundwater in the region of the middle and lower reaches of the YangtzeRiver and their relations to the composition of the water-bearing media, properties of the overly-ing rocks and soils, redox environment, and groundwater flow condition, mineralization and pHof groundwater. 相似文献
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1Introduction Tracemetalsarereleasedtotheatmosphereduring combustionoffossilfuelsandwood,aswellasemis sionsfromavarietyofprocessesactingoncrustalmin erals,includingvolcanism,erosionandsurfaceweath ering.Onaglobalscale,resuspendedsurfacedusts havemadeagreatcontributiontothetotalnaturale missionoftracemetalstotheatmosphere,withCr,Mn andVaccountingfor>50%andCu,Mo,Ni,Pb,Sb andZnaccountingfor>20%,whilevolcanicactivity probablygeneratedasmuchas20%atmosphericCd,Hg,As,Cr,Cu,Ni,PbandSb(Pacyna,19… 相似文献
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平阴县浅层地下水调查采样密度为1点／16km^2,分析测试27项指标的含量变化规律后,认为调查区浅层地下水中除K,Mn,NO2^-等指标含量变化较大,局部富集外,其他指标含量变化小,在浅层地下水中分布较均匀。选择As,Ba,Be,Cd,Co,Cu,Fe,Hg,Mn,Mo,Ni,Pb,Se,Zn,F^-,Cl^-,Cr^6＋,NO2^-,COD,pH等20项指标,按《地下水质量标准》对浅层地下水环境质量进行的单因子和综合评价,结果显示较好级以上者达88．4％,而较差级仅占11．6％,无极差级分布,调查区内浅层地下水环境质量状况良好。 相似文献
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A PETROLOGICAL OVERVIEW OF THE KOHISTAN MAGMATIC ARC, NW HIMALAYA, N. PAKISTAN1 TahirkheliRAK ,MattauerM .ProustF ,etal.1979.In :GeodynamicsofPakistan[C].FarahA ,DeJongKA ,eds.GeolSurvPakistan ,Quetta ,1979.12 5～ 130 .
2 CowardMP ,WindleyBF ,BroughtonRD ,etal.In :CollisionTectonics[C]..CowardMP ,RiesAC ,eds.GeolSoc,London ,SpecPub ,1986 ,19:2 0 3～ 2 19.
3 BardJP ,MaluskiH ,MattePh ,etal.GeolBull ,PeshawarUniversity ,1980 ,13:87～ 93.
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《《地质学报》英文版》2003,77(2)
Members of the Chengjiang Biota from the Lower CambrianNiutitang Formation, Zunyi County, Guizhou Province,ChinaYANG Ruidong, ZHANG Weihua, JIANG Lijun and GAO Hui(Guizhou University of Technology Guiyang, Guizhou 550003)The Chengjiang Biota was called a window of the "Cambrianexplosion". The occurrence of the biota is all along restricted ineastern Yunnan Province. Recently, Naronia, Archotubaconoidalis, Isoxys, Perspicaris, Lingulepis, Tsunyidiscus,Scenella, medusiform fossil, Leptomitus, Rhabdopleura fossil,Hyolithids, Zunyiphyton perelegans Yang et Zhao, 1999,Yuknessia sp., Longenema Ding, 1996, and Sphaerocongregusvariabilis were discovered in the Lower Cambrian Niutitang 相似文献
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《《地质学报》英文版》2007,81(6):F0003-F0003
1.Papers should be devoted mainly to various aspects of research concerning geosciences and related disciplines in China,such as stratigraphy,paleontology,origin and history of the Earth,structural geology,tectonics,mineralogy,petrology,geochemistry, geophysics,geology of mineral deposits,hydrogeology,engineering geology,environmental geology,regional geology and new 相似文献
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广西旅游地学资源丰富,在区位,成景条件,景观种类数量,质量,旅游业的形势,开发程度,客源市场,旅游产品,研究水平等特色明显,如何变资源为效益,必须从发展方向与总体目标,重点区建设模式,开放力度,设施配套及环境保护等方面认真研究,合理开发。 相似文献