Geochemistry of the Rare Earth Elements in Natural Terrestrial Waters：A Review of What Is Currently Knows

The range of observed chemical compositions of natural terrestrial waters varies greatly especially when compared to the essentially constant global composition of the oceans.The concentrations of the REEs in natural terrestrial waters also exhibit more variation than what was reported in seawater,In terrestrial waters ,pH values span the range from acid up to alkaline,In addition,terrestrial waters can range from very dilute waters through to highly concentrated brines.The REE concentrations and their behavior in natural terrestrial waters reflect these compositional ranges,Chemical weathering of rocks represents the source of the REEs to natural terrestrial waters and ,consequently,the REE signature of rocks can impart their REE signature to associated waters,In addition,Because of the typical low solubilities of the REEs both surface and solution complexation can be important in fractionating REEs in aqueous solution.Both of these processes are important in all natural terrestrial waters,however,their relative importance varies as a function of the overall solution composition,In alkaline waters,for example,Solution complexation of the REEs with carbonate ions appears to control their aqueous distributions whereas in acid waters,the REE signature of the labile fraction of the REEs is readily leached from the rocks.In circumneutral pH waters,both processes appear to be important and their relative significance has not yet been determined.     

鄂尔多斯盆地东胜煤田高岭土的物质组成及质量特征

东胜煤田延安组含煤岩系砂岩型高岭土矿石属杂砂岩，基质含量高，矿物组成简单，石英和高岭石分别构成砂岩的碎屑和基质，其它组分含量低碎屑与粘土在粒度和物性上的差异，使两者易于分离。精选漂白的高岭土纯工高，细料组分个体户量和自然白度均较高，是一种优良高岭土。分选出的石英等尾砂ＳｉＯ２含量大于９０％，可综合利用。     

中国东部上地壳化学组成

在中国东部(东经105°以东)约计330万km~2系统采集了28253个岩石样品,组合成2718件分析样,选用了15种可靠的分析方法,以国家一级标准物质监控分析质量,提出了76种化学元素在中国东部出露地壳、沉积盖层、出露基底和上地壳的平均化学组成.     

新04号井数字化水位观测与模拟观测资料的对比分析

在以往30多年曲地震地下流体水位观测中，我国地震地下流体分析预报人员积累了大量水位震例数据和不少宝贵经验，但这些震例和经验都是基于以往的模拟水位观测资料基础上的。如果观测方式进行了数字化改造，那么以往的震例经验还能否继续适用是一个值得探讨的问题。     

Isotopic Characteristics and Key Factors Favoring the Formation of Fuwan Super-large Silver Deposit in Guangdong Province

Rb-Sr isochron age of fluid inclusions in quartz from the Fuwan super-large silver deposit is 68 - 6 Ma, the silver deposit is characterized by high μ values (10.67 - 10.95 ), which are much higher than those of the ore-hosted Paleozoic strata and are close to those of ores hosted in the Proterozoic metamorphic basement in western Guangdong Province. Based on the Pb isotopic characteristics, coupled with much high background silver contents (200-1000ng/g) in the Proterozoic basement and relatively low silver contents in the Paleozoic strata in the region of the Sanshui Basin, it is concluded that the ore-forming material of the super-large silver deposit came mainly from the old basement. The super-large silver deposit related genetically to the intense volcanic activities during the Upper Cretaceous to Eogene. The formation of the Fuwan super-large silver deposit is controlled by the following favorable geological conditions : ( 1 ) The intersection of deep faults and contemporaneous faults at the margin of the Sanshui Basin led to the formation of an excellent structure as passageway for ore fluids; (2) The special ore-hosted rock association forms a ore gathering-trap structure that favors the precipitation of ore; (3) The silver-rich old basement, multi-stage mineralization and multi-episode volcanic activities which constitute a geothermal convection system.     

国有设计大院改制应重视人员安置工作

衣文提出了国有设计大院改制中人员安置的问题，处理好这个问题的重大意义，及所应坚持的原则，给出了解决问题的新方案。     

东濮凹陷白庙地区天然气及凝析油地球化学特征及成因

白庙构造是东濮凹陷南部地区的一个含凝析油的富气构造.在研究油藏基本地质特征的基础上,应用多种地球化学手段研究了气藏中天然气组分、甲烷同位素及惰性气体同位素变化规律、凝析油族组成、饱和烃色谱、色质生物标志物特征,进行了油气源分析,探讨了气藏的形成时间与次序,白庙气藏具有多源、多期、复合成藏的特点.     

页岩、煤、沥青和原油的生气实验研究

选取了有代表性的页岩(海相页岩与油页岩)、煤、沥青与原油样品进行了真空封闭体系生气模拟实验,研究了不同生气母质的生气高峰阶段及其在不同热演化阶段的气产率及气体组成 ,综合探讨了不同生气母质的生气机制与生气规律及母质类型、热演化程度等对气产率及所生天然气组成的影响.为有效气源岩的判识提供了实验依据.     

RTK高差、水准高差组成混合网代替四等水准可行性的分析和研究

GPS RTK新技术在一级及以下的平面控制测量中应用较为广泛，但由于RTK的高程精度明显比平面精度要低．因此在生产中直接采用RTK高程成果较少。本文结合生产实测，对RTK高程的精度进行了一定的分析和处理，采用部分RTK高差代替四等水准高差，组成混合水准网进行平差，并进行精度分析和比较，以供大家参考。     

自动气象站与地面气象测报业务软件中问题处理点滴

使用DYYZⅡ型自动气象站，提高了观测时效，消除了人工读数误差，减轻了观测人员的劳动强度。在4个月的使用过程中，我们发现一些问题，这些问题在使用中我们是如何解决的，下面做一阐述，供大家参考。