ICP—AES法同时测定高纯氧化钇中稀土及非稀土杂质元素方法研究

本文提出了用ＩＣＰ－ＡＥＳ法直接同时测定高纯氧化钇中１４个稀土和１６个非稀土杂质元素的分析方法，对被测元素的 谱线、氧化钇基本及背景影响进行了研究，用标准加入法测出氧化钇基准中的微量杂质元素，消除了由于忽略基准中的杂质元素含量给高纯氧化钇分析测定带来的误差，同时对工作条件进行了优化。方法中各被测元素的检出限为0.003～1.31ug/g，能够满足生产过程中的质量控制及进出口商品检验     

单道扫描电感耦合等离子体发射光谱法测定大洋标准物质中稀土元素

采用单道扫描等离子体发射光谱法测定了大洋多金属结核及深海沉积物中的稀土元素与钪，比较了不同功率下各稀土元素的检测限，研究了低功率下的稳定性，拟定了可靠的样品处理方法。方法经多金属结核及深海沉积物国家标准ＧＢＷ０７３１３、ＧＢＷ０７２４９分析验证，结果与标准值相符。测定精度（ＲＳＤ）在１３％～５３％。已用此法为第２批多金属结核和深海沉积物标准物质提供了定值数据，其结果无剔除值     

试论未来全球气候变化

未来全球气候变化是人们关注的重大课题。从内蒙古盐湖近２０ｋａ气候演变的研究可知，地质时期和历史时期气候波动变化是有规律可循的。用已经了解的这种变化规律来予测未来气候变化是有价值的。研究表明，未来１ｋａ左右全球为暖期，之后将进入下一个冰期。     

A new nutation series for a more realistic model earth

The frequency-dependent correction coefficients with respect to the forced nutations of a rigid earth are computed using the complex scalar gravitational-motion equations for an earth model with an anelastic mantle. Oceanic loads and tidal currents enter the model via outer boundary conditions. The ellipticity of the core-mantle boundary and the dynamical ellipticity are adjusted to observations. This requires the behaviour inside the model earth to be regarded as non-hydrostatic. Some relevant equations for the evaluation of boundary conditions and some terms in the equations of motion are expanded to second order in ellipticity. The computation of the equipotential-surface ellipticity profile is carried to second order as well. These second-order expansions lead to increased accuracy of the results in general. Moreover, one achieves a better reliability for the integration at frequencies close to a resonance. This allows the integration of the equations of motion at any relevant nutation period without the need for a normal-mode expansion. A complete new nutation series for a realistic model earth is presented.     

柴达木盆地水资源环境及生态效应地球卫星遥感监测研究定位站

柴达木盆地水资源环境及生态效应地球卫星遥感监测研究定位站胡东生（中国科学院青海盐湖研究所，西宁，８１０００８）关键词水资源环境生态效应，地球卫星遥感监测，定位研究站，柴达木盆地，青藏高原１．立现依据和研究意义柴达木盆地处于青藏高原的东北部，四周群山环...     

地幔对流中的科里奥利力

马宗晋认为，岩石圈的西向漂移和地幔东向运动的定向性显示了地球自转变化的导向作用［１］。本文证明，地球自转中的一种惯性力──科里奥利力是产生地球各圈层差异旋转的原因。     

云南老王寨金矿区煌斑岩的成因：稀土元素研究

云南老王寨金矿区煌斑岩与金矿化在时间上、空间上密切共生。主要元素分析表明，本区煌斑岩属钾质－富钾质钙碱性煌斑岩；与原始地幔和大洋中脊玄武岩相比，岩石相对富集稀土元素；模拟计算表明，岩石来源于稀土元素相对富集的交代富集地幔；地质发展史、不相容元素分配型式、Ｓｒ、Ｎｄ同位素组成及有关模拟计算表明，俯冲进入地幔楔的地壳物质脱水 流体是引起该区地幔交代作用的主要因素。     

Rare earth and other trace element mobility during mylonitization: a comparison of the Brevard and Hope Valley shear zones in the Appalachian Mountains, USA

In progressing from a granitoid mylonite to an ultramylonite in the Brevard shear zone in North Carolina, Ca and LOI (H₂O) increase, Si, Mg, K, Na, Ba, Sr, Ta, Cs and Th decrease, while changes in Al, Ti, Fe, P, Sc, Rb, REE, Hf, Cr and U are relatively small. A volume loss of 44% is calculated for the Brevard ultramylonite relative to an Al–Ti–Fe isocon. The increase in Ca and LOI is related to a large increase in retrograde epidote and muscovite in the ultramylonite, the decreases in K, Na, Si, Ba and Sr reflect the destruction of feldspars, and the decrease in Mg is related to the destruction of biotite during mylonitization. In an amphibolite facies fault zone separating grey and pink granitic gneisses in the Hope Valley shear zone in New England, compositional similarity suggests the ultramylonite is composed chiefly of the pink gneisses. Utilizing an Al–Ti–Fe isocon for the pink gneisses, Sc, Cr, Hf, Ta, U, Th and M-HREE are relatively unchanged, Si, LOI, K, Mg, Rb, Cs and Ba are enriched, and Ca, Na, P, Sr and LREE are lost during deformation. In contrast to the Brevard mylonite, the Hope Valley mylonite appears to have increased in volume by about 70%, chiefly in response to an introduction of quartz. Chondrite-normalized REE patterns of granitoids from both shear zones are LREE-enriched and have prominent negative Eu anomalies. Although REE increase in abundance in the Brevard ultramylonites (reflecting the volume loss), the shape of the REE pattern remains unchanged. In contrast, REE and especially LREE decrease in abundance with increasing deformation of the Hope Valley gneisses. Mass balance calculations indicate that ≥95% of the REE in the Brevard rocks reside in titanite. In contrast, in the Hope Valley rocks only 15–40% of the REE can be accounted for collectively by titanite, apatite and zircon. Possible sites for the remaining REE are allanite, fluorite or grain boundaries. Loss of LREE from the pink gneisses during deformation may have resulted from decreases in allanite and perhaps apatite or by leaching ofy REE from grain boundaries by fluids moving through the shear zone. Among the element ratios most resistant to change during mylonitization in the Brevard shear zone are La/Yb, Eu/Eu*, Sm/Nd, La/Sc, Th/Sc, Th/Yb, Cr/Th, Th/U and Hf/Ta, whereas the most stable ratios in the Hope Valley shear zone are K/Rb, Rb/Cs, Th/U, Eu/Eu*, Th/Sc, Th/Yb, Sm/Nd, Th/Ta, Hf/Ta and Hf/Yb. However, until more trace element data are available from other shear zones, these ratios should not be used alone to identify protoliths of deformed rocks.     

热幔柱的启动动力

科氏力是地球各圈层差异旋转的原因。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。     

洞庭地洼安乡硅土矿床的发现

安乡硅土矿床赋存于地洼余动期亚构造层中，矿石主要由粉石英、伊利石和蒙脱石组成，是一个具有很好开发应用前景的大型非金属矿床。