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earth crust rock
相关语句
  地壳岩石
     in deep-seated gold deposit, the vein quartz shows low ∑REE、∑Y/∑Sc、∑LLREE/∑HREE、 high Eu/Sm, La/Yb below the calculated value of the earth crust rock, and the REE pattern similar to that of the ultrabasic rocks.
     深成金矿床脉石英则显示∑REE、∑Y/∑S_c、∑LREE/∑HREE、Eu/Sm较大,La/Yb低于地壳岩石计算值,稀土配分模式与超基性岩类相似.
短句来源
     Silicates are the most important forming-rock minerals of earth crust rock and in exogenous environments,and the dissolution of silicate minerals is universal.
     硅酸盐是地壳岩石最主要的造岩矿物,表生条件下硅酸盐矿物的溶解是普遍的。
短句来源
  相似匹配句对
     LOADING STRESS IN THE EARTH'S CRUST
     地壳中的负荷应力
短句来源
     There are ions and voltage in the earth's crust.
     地壳中存在离子 ,也存在电压。
短句来源
     Rock Compression Shear Fracture Inference of the Earth's Crust
     地壳岩石压剪断裂端倪
短句来源
     DENSITY OF THE EARTH
     地球的密度
短句来源
     rotation of the earth
     地球自转
短句来源
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After the neutron activation REE analysis for vein quartz, the phenocryst quartz in quartz porphyry, the Cu-Mo mineralized vein quartz and the vein quartz in metadiabase in Gaofan orefield Wutai district, and refering to some studies from Russia, it shows that the trace REE geochemical characteristics of quartz can basically represent the geochemical characteristics of the initial mineralizing solution or magma in which the quartz was formed, and can be used to determine the genesis and material source of gold...

After the neutron activation REE analysis for vein quartz, the phenocryst quartz in quartz porphyry, the Cu-Mo mineralized vein quartz and the vein quartz in metadiabase in Gaofan orefield Wutai district, and refering to some studies from Russia, it shows that the trace REE geochemical characteristics of quartz can basically represent the geochemical characteristics of the initial mineralizing solution or magma in which the quartz was formed, and can be used to determine the genesis and material source of gold deposit: In shallow-seated gold deposit, the quartz shows high ∑REE、∑Y/∑Sc、∑LREE/∑HREE, low Eu/Sm, La/Yb in the range of the earth crust rock, the REE pattern similar to that of the acid rocks; in deep-seated gold deposit, the vein quartz shows low ∑REE、∑Y/∑Sc、∑LLREE/∑HREE、 high Eu/Sm, La/Yb below the calculated value of the earth crust rock, and the REE pattern similar to that of the ultrabasic rocks.

通过对五台地区高凡矿田高凡银金矿床中的脉石英、石英斑岩中的石英斑晶、铜钼矿化脉石英和变辉绿岩脉中脉石英的中子活化稀土成分分析,并结合苏联有关研究资料表明:石英中微量稀土元素的地球化学特征基本上反映了其形成时初始溶液或岩浆的稀土元素地球化学行为,可利用来判断金矿床的成因及成矿物质来源.浅成金矿床脉石英显示∑REE、∑Y/∑S_c、∑LREE/∑HREE、Eu/Sm较小,La/Yb处于地壳岩石计算值范围,稀土配分模式基本与酸性岩类的一致;深成金矿床脉石英则显示∑REE、∑Y/∑S_c、∑LREE/∑HREE、Eu/Sm较大,La/Yb低于地壳岩石计算值,稀土配分模式与超基性岩类相似.

Silicates are the most important forming-rock minerals of earth crust rock and in exogenous environments,and the dissolution of silicate minerals is universal. In most laboratory experiments,there is an initial period during which nonlinear dissolution behavior is observed and steady-state dissolution rates range from 10-12 to 10-8 mol/(m2·s). Dissolution is nonstoichiometric in most experiments. Bulk dissolution rates are not directly proportional to the surface areas of the minerals studied,but when...

Silicates are the most important forming-rock minerals of earth crust rock and in exogenous environments,and the dissolution of silicate minerals is universal. In most laboratory experiments,there is an initial period during which nonlinear dissolution behavior is observed and steady-state dissolution rates range from 10-12 to 10-8 mol/(m2·s). Dissolution is nonstoichiometric in most experiments. Bulk dissolution rates are not directly proportional to the surface areas of the minerals studied,but when grains are large compared with the distance among adjacent defects,they will vary linearly with the specific surface areas. Under acidic conditions, dissolution rates are positively proportional to the concentration of hydrogen ion. Organic ligands deriving from organic soluble matter can complex metal ions in solutions and at solid-solution interface,and promote dissolution of silicate minerals. The effect of temperature on dissolution rates follows the Arrhenius equation. In view of the coincidence between the promoting factors of silicate dissolution and landslide occurrence,concentrations of chemical components in watershed surface water may be taken into account in regional evaluation of landslide hazard. Plants can raise the acidity of groundwater and content of organic mater in soil and groundwater runoff rate. The effect of plants on silicate mineral dissolution and landslide preparation is conspicuous. The nonlinear dissolution on slope rockmass scale and the multi-scale preferential dissolution of rock mass are necessary to investigate thoroughly. The concrete problems include identifying and dividing the lasting time of different dissolution states in natural slope water-rock systems,identifying multi-scale damage model of rockmass and transporting mechanism of fluid and chemical components in slope rockmass,and mechanical effect of multi-scale preferential dissolution and so on.

硅酸盐是地壳岩石最主要的造岩矿物,表生条件下硅酸盐矿物的溶解是普遍的。实验室条件下,硅酸盐矿物存在非线性溶解现象,稳定态溶解速率一般为10-12~10-8 mol/(m2·s),而组分析出一般都是非理想配比的。体溶解速率与比表面积不存在简单的比例关系,但当单晶典型尺寸大于矿物表面上相临缺陷的间距时,体溶解速率则与比表面积呈正比。酸性条件下的溶解速率与H+ 活度正相关。源于可溶有机质的有机配位体能够络合溶液及固–液界面上的金属离子,可显著提高溶解速率。温度对溶解速率的影响受控于阿雷尼乌斯方程。鉴于硅酸盐矿物溶解规模的影响因素与滑坡灾害的发生条件基本一致,在滑坡灾害的区域性评价中,可以考虑纳入流域地表水化学组分浓度这一地球化学指标。植被可以提高斜坡岩土体的酸度、有机质丰度及地下水径流量,在促进硅酸盐矿物溶解及深层滑坡孕育方面的作用是显著的。

 
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