青海省东昆仑洪水河东地区斑岩铜钼矿找矿潜力分析

洪水河东地区岩浆活动强烈,石英闪长斑岩、英云闪长斑岩较发育,岩体、围岩及其接触带绿泥石化、绿帘石化、碳酸盐化、钾长石化、高岭土化、迪开石化、绢云母化和矽卡岩化等蚀变普遍且较强烈,具斑岩型矿化蚀变特征。研究区内Cu、Mo、W化探组合异常分布较多,具备典型的斑岩铜矿床的元素组合特征,岩体含矿性与化探异常吻合,且在研究区盘羊沟、乌腊德地区发现了铜钼矿体。据此分析,认为洪水河东地区具备斑岩铜钼矿成矿地质条件,斑岩型铜钼矿找矿潜力较大。     

无固相冲洗液在深溪锰矿施工中的应用

贵州深溪锰矿普（详）查区钻探钻遇较为复杂的水敏性地层、破碎性岩层,在合理选择好钻探设备、钻进参数和正确操作的前提下,选用PHP-GSP和GPLS植物胶两类无固相冲洗液,有效地预防了钻孔缩径、孔壁坍塌,降低了钻具与孔壁的摩擦阻力,从而达到了预防孔内事故的目的;同时还提高了机械钻速、减少了冲洗液材料运输量,提高了钻探经济效益;此外还具有环保等优点。介绍了PHP-GSP和GPLS植物胶无固相冲洗液的作用机理、配制方法及使用注意事项等。     

改进后的频次分析法分析水文资料代表性初探

将传统的频次分析法加权改进后,量化比较和判断若干短系列水文数据与长系列资料中丰、平、枯分布的接近程度,寻找最具代表性的样本系列.这种改进使水文数据的代表性分析更为直观、合理.     

超临界CO2流体萃取土壤中污染物的应用研究进展

CO2在超临界状态下具有许多独特的物理化学性质,作为一种“绿色”溶剂,它具有无毒、无污染、易获取等优点。近年来,有关超临界CO2流体热力学相行为和溶解度性质的研究引起人们广泛的关注,与之密切相关的超临界流体萃取技术已在许多领域得到重视和发展。根据近年国内外运用超临界CO2流体对土壤中多环芳烃、多氯联苯、重金属等污染物的萃取应用,分析了温度、压力、共溶剂等因素对萃取效果的影响,通过与其他土壤修复技术的比较,展望了超临界流体萃取技术应用于土壤修复领域的可行性和研究方向。     

2006年度大气科学领域基金项目评审与成果评述

1 2006年度项目受理、送审和资助情况 2006年度地球科学部五处受理各类基金项目565项,其中:面上项目516项(自由申请376项,青年科学基金121项,地区科学基金19项);"天气、气候系统的物理动力学"优先资助领域重点项目20项;国家杰出青年科学基金(18项)与海外青年学者合作研究基金(6项)共计24项,创新研究群体科学基金1项;专项基金4项.     

蛟河地区前进岩体锆石U-Pb年龄及其与吉中-延边地区钼矿成矿作用的关系

通过系统翔实的野外地质调查,对吉林蛟河地区前人划分的前进岩体进行了详细研究,结合岩石学、岩石化学等特征,确定该岩体岩石类型为中粒-中细粒二长花岗岩。采用LA-ICPMS锆石U-Pb方法获取该岩体二长花岗岩的侵位年龄为（205±5.0）Ma,与吉林大学孙德有教授做三道河碱长花岗岩岩体同位素年龄（216±3）Ma基本相当;同时作者详细研究了吉中-敦化地区钼矿成矿作用,确定该期花岗岩与钼矿成矿作用无关。     

兰州特产——安宁蜜桃产地的农业地质特征

专项农业地质调查表明,兰州安宁蜜桃产地具有优良桃树生长发育的良好农业地质环境。其突出特征是①典型的冷凉、通风、向阳的气候-地理环境;②由砂岩、花岗岩地层岩石风化形成的透气、透水的冲洪积砂质壤土;（爹土壤中富含特需的品质元素——钾素;（多土壤中主要营养元素N、P、K和微量营养元素Fe、Mn、Cu、Zn、B、Mo的丰缺度组合形态以及其拮抗作用极有利于桃树良好生长发育。桃园区经过一定的工作和程序,可建立桃农业地学示范基地和无公害桃栽培旅游区。     

Improvement to the Evaporation Duct Model by Introducing Nonlinear Similarity Functions in Stable Conditions

Modified refractivity (M) profile is an important parameter to describe the atmospheric refraction environment, as well as a key factor in uniquely evaluating electromagnetic propagation effects. In order to improve the model-derived M profile in stable (especially very stable) conditions, three nonlinear similarity functions, namely BH91, CB05, SHEBA07, are introduced in this paper to improve the original Babin_V25 model, and the performances of these modified models are verified based on the hydrometeorological observations from tower platforms, which are finally compared with the original Babin_V25 model and Local_HYQ92 model. Results show that introducing nonlinear similarity functions can significantly improve the model-derived M profile; especially, the newly developed SHEBA07 functions manage to reduce the predicted root mean square (rms) differences of M and M slope (for both 0–5 m and 5–40 m) by 64.5%, 16.6%, and 60.4%, respectively in stable conditions. Unfortunately, this improved method reacts little on the evaporation duct height; in contrast, Local_HYQ92 model is capable of reducing the predicted rms differences of M, M slope (for both 0–5 m and 5–40 m), and evaporation duct height by 76.7%, 40.2%, 83.7%, and 58.0% respectively. Finally, a new recommendation is made to apply Local_HYQ92 and Babin_SHEBA07 in very stable conditions considering that M slope is more important than evaporation duct height and absolute M value in uniquely determining electromagnetic propagation effects.     

西北太平洋双热带气旋相互作用统计分类及其特征分析

采用中国气象局与上海台风研究所提供的1949-2007年西北太平洋热带气旋最佳路径资料,统计分析了西北太平洋上的双(多)热带气旋相互作用现象.针对统计出的双热带气旋样本,根据相互作用两气旋的单独移动路径和它们相互作用的路径特征,归纳得到7种相互作用类型( A～G),并用聚类分析方法拟合得到每种类型的平均回归路径.分析讨...     

NUMERICAL EXPERIMENTS ON THE IMPACTS OF SEA SPRAY ON TROPICAL CYCLONES

The latest version of sea spray flux parameterization scheme developed by Andreas is coupled with the PSU/NCAR model MM5 in this paper. A western Pacific tropical cyclone named Nabi in 2005 is simulated using this coupled air-sea spray modeling system to study the impacts of sea spray evaporation on the evolution of tropical cyclones. The results demonstrate that sea spray can lead to a significant increase of heat fluxes in the air-sea interface, especially the latent heat flux, the maximum of which can increase by up to about 35% - 80% The latent heat flux seems to be more important than the sensible heat flux for the evolution of tropical cyclones. Regardless of whether sea spray fluxes have been considered, the model can always simulate the track of Nabi well, which seems to indicate that sea spray has little impact on the movement of tropical cyclones. However, with sea spray fluxes taken into account in the model, the intensity of a simulated tropical cyclone can have significant increase. Due to the enhancement of water vapor and heat from the sea surface to the air caused by sea spray, the warm core structure is better-defined, the minimum sea level pressure decreases and the vertical speed is stronger around the eye in the experiments, which is propitious to the development and evolution of tropical cyclones.