N-间甲苯基-N′-(对氨基苯磺酸钠)硫脲与铜的显色反应及应用

研究了新试剂Ｎ－间甲苯基－Ｎ′－（对氨基苯磺酸钠）硫脲（ＭＭＰＴ）与Ｃｕ２＋的显色反应。结果表明,在ｐＨ４．６～５．６的ＨＡｃ－ＮａＡｃ介质中,Ｃｕ２＋与ＭＭＰＴ形成的配合物至少稳定５ｈ,其λｍａｘ＝３７０ｎｍ,表观摩尔吸光系数为１．１２×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。Ｃｕ２＋的质量浓度在０．０８～１．４ｍｇ／Ｌ时符合比尔定律,相关系数ｒ＝０．９９９１。方法简便、快速,用于铅矿中铜的分析,测定结果与监控样推荐值相符,对ｗ（Ｃｕ）＝０．８％的试样测定６次,ＲＳＤ＝３．２％。     

哀牢山过山气流的气候效应

本文研讨哀牢山脉北段西南季风与东北季风的过山气候效应。     

新疆气候与环境的过去,现在及未来情景

在分析近年来新疆地质时期与历史时期气候与环境研究方面大量的文献资料与成果,并对现代器测时期的气候变化问题进行讨论的基础上,利用综合分析法构画了新疆下世纪上半叶气候与环境的可能情景,认为新疆气候与环境初期于的晚白垩世,主要形成于第三三纪,至今总的干旱情并未改变。     

天然火山作用探测华北下地壳组成、结构及其形成过程

与中上地壳相比，对下地壳组成、结构的认识受限于样品的获取，然而天然火山作用携带的下地壳捕虏体可以为了解下地壳提供关键样品。华北克拉通是世界上最古老的克拉通之一，显生宙以来的火山作用携带有丰富的下地壳捕虏体，为探测华北下地壳组成、结构及其形成过程提供了可能。通过对这些捕虏体定深、定性及定年的综合研究，构建了以信阳，莒南，汉诺坝和女山等典型地区为代表的下地壳组成、结构剖面模型。这些剖面表明，华北克拉通下地壳具有分层的特点，且上老下新，暗示可能与底侵作用有关。其中捕虏体的锆石U- Pb年龄和Hf同位素的研究，揭示了该克拉通下地壳复杂的形成与演化过程：最古老的组成部分可能老至~4. 0 Ga冥古宙，此后经历了3. 80~3. 65 Ga古太古代的再造作用，2. 8~2. 5 Ga 新太古代和2. 3~1. 8 Ga 古元古代的增生与再造共存，同时还经历了显生宙以来包括462~220 Ma，140~90 Ma和47~45 Ma的增生与再造事件。     

南祁连山前区中生代晚期古构造特征的研究

南祁连山前区可以分为露头和盆地区两个不同的大地构造单元,本区晚中生代构造活动强烈,控制了新生代的沉积过程和现今中生界残余层序的分布。本文提出了均匀平板状沉积体后期的构造变形可以利用古地质图以及高精度残余地层厚度的变化规律判断古构造带的分析方法,并且对于研究区中生代晚期的古构造特征进行了分析。露头区主要利用古地质图分析方法,研究区集中在赛什腾山-埃姆尼克山北缘的鱼卡和红山地区。盆地区主要利用中生界残余厚度图的分析方法,研究区集中在赛什腾山-埃姆尼克山南侧的赛什腾南部凹陷和马海凸起地区。通过这4个地区古构造特征的研究,提出南祁连山前区中生代晚期在区域性隆升的背景下,形成了一系列古构造带,古构造活动的特点是形成北西-北北西走向的背斜和向斜构造,这些褶皱的波长为15～20 km,为中尺度规模。同时指出,中国西部多数地区均缺失上白垩统,暗示着当时的中亚地区存在一个广阔的晚白垩世古高原。     

华北及其邻区块体转动模式和动力来源

块体的转动是地壳中重要的构造运动形式。根据地质、地球物理和地震活动性等资料，可将华北及其邻区划分为３个亚板块，华北亚板块可进一步细分为多个级块体，这些不同级别的块体或多或少都显示出一定的刚体特性。根据地质构造、地震和古地磁测量等资料，详细地论细地论述了不同级块体的转动问题，即华北及其邻区的黑龙江、华北和华南等３个近东西向亚板块自老第三纪以来相对于新疆地区顺时针转动了１．６°～３．５°；华北亚板块内     

Mid-Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia

Early Cambrian and Mid-Late Neoproterozoic volcanic rocks in China are widespread on several Precambrian continental blocks,which had aggregated to form part of the Rodinia supercontinent by ca.900 Ma....     

三江平原沼泽地碳循环初探

在三江平原多年考察与研究的基础上，通过典型沼泽的定位观测，估算了三江平原沼泽土壤中的碳储量，探讨了沼泽植物对大气ＣＯ２的固定，碳素自沼泽土壤向大气的转移，沼泽近地气层ＣＯ２流，以及沼泽植物－土壤－大气之间的碳素流动。     

雅鲁藏布江曲水-泽当段风沙活动动力条件分析与风沙灾害防治建议

雅鲁藏布江河流宽谷区是青藏高原风沙活动最为强烈地区之一.本文选择雅鲁藏布江曲水-泽当段为研究区,分析该地区1981-2010年以来的风动力条件变化特征.结果表明:1981年以来年平均风速明显降低,月平均风速2-4月最大.受河流-山地复合系统的影响,风向复杂且具有明显的空间差异性,贡嘎以西风和东风为主,泽当包括西风、南风...     

Temporal variations in aerosol composition at Lanzhou City,Northwestern China

Although Lanzhou is one of the most heavily polluted cities in China, the composition of its air pollutants have not yet been studied in detail. The data of four months on the concentrations and compositions of ions from daily air-filter samples in the winter and spring during 2007–2008 were analyzed to investigate temporal trends and their possible causes. The results indicate that mean concentrations of almost all the aerosol components are greater in winter than in spring due to stronger emissions in winter and weaker localized dispersion. Spring dust storms are the major cause of the highest peak PM10 concentrations recorded during the study period; however, these elevated levels were transient. Ion concentrations related to coal combustion show the greatest reduction from winter to spring, while the concentrations of strong crustal components show a less-pronounced reduction. Strong cycles in the levels of particulate matter (PM) and all ions are also observed during the winter months due to meteorological conditions. Depending on the season, nine different ions accounted for 20%–50% of the PM concentration. The particle size of polluting ions was constant at times of increasing PM concentrations (particularly during winter), whereas the particle size of crustal ions increased dramatically during spring dust storms. Local meteorological conditions (especially wind speed) have a strong influence on the levels of pollutants. Four dust storms were noted, including one during winter. In summary, the regional transport of desert dust from the Gobi can significantly affect air quality and the chemical composition of aerosols in Lanzhou. The dust storms can strongly increase concentration of crustal ions, which are characteristics of deserts in northwestern China. This observation is in agreement with back-trajectories, which show reduced levels of pollutant ions during dust storms. Data on nitrate:sulfate ratios indicate that stationary point sources are the main source of ions rather than mobile sources.