塔里木盆地西部含盐系地层成盐元素的地球化学初步研究

钾矿是我国目前紧缺的矿种之一 ,钾矿的寻找对我国有着十分重要的意义。塔里木盆地是我国第三系地层的广泛发育区域 ,有一定的找钾远景 ,尤其是库车、莎车等地区。通过对塔里木盆地 (坳陷 )西部的区域地质概况、成矿条件等的介绍 ,运用地球化学的分析测试手段 ,对塔里木盆地西部采集到的样品作了地球化学分析。论述了该区成盐沉积的地球化学特征 ,并讨论了该区形成钾矿的可能性。     

贵州雷公山背斜南段锑矿控矿条件浅析

本文根据雷公山背斜南段的几个锑矿床的勘查资料，结合1：5万区调和相应的科研成果，总结该区锑矿床的共同特征，并对其控矿条件进行分析，认为逆冲断层、剪切带控制锑矿田的分布，“褶皱 断层”控制锑矿床分布，单条剪切带及后期脆性断层控制锑矿体的产出。     

层控夕卡岩型矿床成矿系统的元素活动性及质量迁移--以铜陵冬瓜山铜矿床为例

应用改善了的质量平衡方程研究冬瓜山层控夕卡岩型铜矿床成矿系统的元素活动性及质量迁移，结果表明：系统中Zr,Hf,Y和Nb为不活动元素，其余均为活动元素。主量元素中仅CaO为迁出组分，其质量迁移量为84％，其余均为带入组分，带入量最大的SiO2的质量迁移量高达2384％；稀土元素均为带入组分，其中，中稀土较轻稀土和重稀土的活动性更强；其它微量元素中，带入序列由强到弱为：Cr→Ta→Sn→Th，迁出序列由强至弱依次为：U→Sb→Ni—Sr→Ba→Bb→Co→W；成矿元素Cu和Ag为带入组分，其中Cu的带入量最大，质量迁移量高达1200％。本文还得出两点具普适性认识：①稀土元素较其它微量元素对体系条件的变化更为敏感，且往往表现出明显的规律性变化，能更好地示踪地质地球化学过程。②不同元素在不同体系中的行为特征差异极大，仅凭经验判定某一元素为不活动元素往往不可靠。因此，在开展质量平衡研究时，首先采用适当方法确认体系的不活动元素是一项不可或缺的前提工作。     

庐山星子群变质岩的变质作用P-T条件研究

对分布于扬子块体南缘古元古代星子群变质宏的变质作用研究表明，它们普遍经历了角闪岩相的变质，其变质温度为480℃-580℃，压力在300MPa-500MPa之间。这与扬子块体南缘其他元古代地层仅经历了轻微变质的事实截然不同，表明星子群变质岩具有独特的构造演化历史。越来越多的研究发现，星子群变质岩是由地壳伸展作用引发的、来源于下地壳的前寒武纪变质基底，它并不是来源于华夏块体的“飞来峰”。     

抗拔桩设计方法

当地下水位较高时,地下车库等附属建筑物不得不对抗浮问题进行考虑,抗拔桩被越来越多的应用于工程中。依据工程实例对抗拔桩设计荷载条件、抗浮桩单桩承载力设计、抗浮桩桩身结构设计、群桩地基整体稳定性、单位面积抗浮力、抗拔桩抗裂分别进行了阐述,以及抗拔桩设计中应考虑的问题进行了论述。     

煤层气开发利用与辽宁能源环境

对辽宁省主要煤田煤层气赋有条件及开发利用现状和开发潜力进行了研究评价。同时对辽宁省煤层气市场与煤层气开发效益进行了分析,并提出了重点目标区和开发利用建议。     

甘肃北祁连山寒山金矿床控矿条件与成矿模式

通过对该矿床成矿地质背景、矿床地质特征、成矿标志及控矿因素等诸方面分析，指出成矿物质主要来源于下奥陶统岛弧钙碱性安山—英安质火山碎屑岩，矿体受多级断裂裂隙系统的控制，且主要定位于韧—脆性剪切带内的强片理化带中，成矿作用发生于碰撞造山作用挤压—伸展转变期，花岗闪长岩、闪长岩等造山期中酸性岩体侵位期间及其以后，深部岩浆房或中酸性侵入体主要为矿床形成提供了热驱动力，矿床成因类型属与火山岩有关的构造蚀变岩型金矿床。在此基础上，总结归纳了该矿床的成矿模式与综合找矿标志。     

小秦岭金矿含金石英脉中石英晶体微形貌研究

利用微分干涉显微镜等手段对小秦岭金矿含金石英脉中不同成矿阶段的石英晶体微形貌进行了研究。石英晶体{101^-1}、{011^-1}、{101^-0}单形晶面上不同特征的微形貌对了解石英晶体的生长机理、生长速率、生长环境的变化及成矿溶液的过饱和度具有重要意义，同时也可提供成矿阶段划分及晶体生长时热力学条件的信息。     

Scaling effects on modeled surface energy-balance components using the NOAH-OSU land surface model

As surface exchange processes are highly non-linear and heterogeneous in space and time, it is important to know the appropriate scale for the reasonable prediction of these exchange processes. For example, the explicit representation of surface variability has been vital in predicting mesoscale weather events such as late-afternoon thunderstorms initiated by latent heat exchanges in mid-latitude regions of the continental United States. This study was undertaken to examine the effects of different spatial scales of input data on modeled fluxes, so as to better understand the resolution needed for accurate modeling. A statistical procedure was followed to select two cells from the Southern Great Plains 1997 hydrology experiment region, each 20 km×20 km, representing the most homogeneous and the most heterogeneous surface conditions (based on soil and vegetation) within the study region. The NOAH-OSU (Oregon State University) Land Surface Model (LSM) was employed to estimate surface energy fluxes. Three scales of study (200 m, 2 and 20 km) were considered in order to investigate the impacts of the aggregation of input data, especially soil and vegetation inputs, on the model output. Model results of net radiation and latent, sensible and ground heat fluxes were compared for the three scales. For the heterogeneous area, the model output at the 20-km resolution showed some differences when compared with the 200-m and 2-km resolutions. This was more pronounced in latent heat (12% decrease), sensible heat (22% increase), and ground heat flux (44% increase) estimation than in net radiation. The scaling effects were much less for the relatively homogeneous land area with 5% increase in sensible heat and 4% decrease in ground heat flux estimation. All of the model outputs for the 2- and 20-km resolutions were in close agreement. The results suggested that, for this study region, soils and vegetation input resolution of about 2 km should be chosen for realistic modeling of surface exchange processes. This resolution was sufficient to capture the effects of sub-grid scale heterogeneity, while avoiding the data and computational difficulties associated with higher spatial resolutions.     

NNR constraint in ITRF2000 and the new global plate motion model NNR-ITRF2000VEL

There are 54 sites employed by ITRF2000 for ITRF2000 orientation. The deficiencies are obvious. First, these sites cannot well represent the rotation rate of the earth crust because there is no selected site in five out of fourteen tectonic plates and three of fourteen plates only have one site each. Second, the total angular momentum of the crust is non-vanishing in ITRF2000, even though it is declared that No Net Rotation (NNR) with respect to NNR-NUVEL1A is imposed on ITRF2000 construction according to the documentations of ITRF2000. So the NNR condition in conventional terrestrial reference system (CTRS) realization cannot be satisfied in ITRF2000. In this paper, the criteria of site selection for estimating the Euler vectors are suggested; the Tisserand system constraint equation in ITRF construction is derived; and as a product, the global plate motions can be obtained from the ITRF2000 construction.