黑龙江多宝山、铜山大型斑岩铜(钼)矿床中辉钼矿的铼-锇同位素年龄

黑龙江多宝山、铜山大型斑岩铜（钼）矿床的成岩成矿年龄以往确定主要为华力西中晚期至印支期（３１１－２１９Ｍａ），本次研究测得辉钼矿ＲｅＯｓ等时线年龄为５０６±１４Ｍａ。它和用其他方法测定的同位素年龄有较大差别，从而为进一步讨论矿床的成矿作用提供了新的线索，推断此数据可能反映辉钼矿源岩下奥陶统酸性火山碎屑岩的年龄。研究还发现辉钼矿中１８７Ｏｓ的含量特高，且估算储量很大，具有巨大的潜在经济价值。     

STUDY ON THE CHEMICAL CHARACTERISTICS OF POLLUTING FOG IN GUANGZHOU AREA IN SPRING

Samples of fog water collected in the area of Guangzhou during February, March and April of 2005 are used in this work to study the chemical composition of fog water in polluting fog there. Three typical episodes of polluting fog are analyzed in terms of ionic concentration and their possible sources. It is found that the concentration of various ions in fog water is much higher than those in rainwater. Fog not only blocks visual range but contains liquid particles that result in high degree of pollution and are very harmful to human health. SO₄⁼ is the anion with the highest concentration in fog water, followed by NO₃^-.For the cation, Ca⁺⁺ and NH₄⁺ are the highest in concentration. It is then known that rainwater is more acidic than fog water, indicating that ionic concentration of fog water is much higher than that of rainwater, but there are much more buffering materials in fog water, like NH₄⁺ and Ca⁺⁺. There is significant enrichment of Ca⁺⁺, SO₄⁼, and Mg⁺⁺ in fog water. In the Guangzhou area, fog water from polluting fog is mainly influenced continental environment and human activity. The episodes of serious fog pollution during the time have immediate relationships with the presence of abundant water vapor and large amount of polluting aerosol particles.     

河北省张家口市崇礼区储雪试验的先期评估

气候变暖导致的滑雪场营业时间变短和造雪成本升高、大型体育赛事用雪缺乏保障等问题日益突出,储雪是解决这些问题的有效措施之一.然而目前基于高效隔热结构和新材料的场地储雪技术研究稀缺,无法满足日益增长的滑雪赛事与娱乐需求.为筛选储雪的最优技术方案,基于不同的隔热材料和隔热结构,在河北省张家口市崇礼区万龙滑雪场设置了四个建造成...     

三峡水库香溪河初级生产力及其影响因素分析

2013 2014年采用黑白瓶测氧法对香溪河不同站点(上、中、下游及其支流库湾)和不同水深(0.5、1.0、2.0、5.0和10.0 m)的初级生产力进行原位测定.结果显示:(1)三峡水库蓄水后香溪河水域初级生产力具有显著的空间差异,支流和上游的总初级生产力大于中、下游,下游的初级生产力水平最低;初级生产力随着水深增加呈现逐渐减少的趋势;(2)初级生产力具有显著的季节差异,春、夏季显著高于秋、冬季;(3)光照强度、水温和天气对初级生产力有显著影响,水体叶绿素浓度与初级生产力极显著相关.结果显示,蓄水后改变的水文情势将香溪河的初级生产划分为明显不同的两个区域,水动力条件成为影响初级生产力的重要因子;依据初级生产力判断香溪河为富营养、自养代谢型水体.     

华南地区中生代以来岩石圈伸展及其与铀成矿关系研究的若干问题

华南地区中生代以来存在大规模的岩石圈伸展作用,与伸展作用相对应,形成了大量花岗岩型、火山岩型和碳硅泥岩型铀矿床。文章详细总结了华南中生代以来岩石圈伸展作用和铀成矿作用的研究进展。通过系统分析,认为要深刻揭示岩石圈伸展与区域铀成矿的关系,至少尚有两大重要科学问题未解决:其一是华南白垩纪—第三纪岩石圈伸展和铀成矿的准确期次及其空间迁移规律;其二为岩石圈伸展期铀成矿的必然性或铀为什么会集中在岩石圈伸展期成矿。要解决第一个问题,需要对铀矿床和岩石圈伸展期形成的基性脉岩开展系统的高精度定年工作;要解决第二个问题,则需要系统研究成矿流体中CO2等气体组分在铀成矿中的作用及其成因。     

松辽盆地长岭断陷盆地断陷期构造转换及油气地质意义

本文以平衡剖面理论为指导,对松辽盆地长岭断陷3条近东西走向的剖面进行了研究。结果表明,长岭断陷盆地在火石岭期初始张裂,沙河子期、营城期断陷强烈扩张,伸展速率均在沙河子期最大,分别为907.50 m/Ma、1373.90 m/Ma和1100.00 m/Ma,两次扩张末期都伴有构造反转。沙河子末期最大缩短量达2.11 km,缩短率2.89%;营城末期最大缩短量达2.26 km,缩短率3.21%。登娄库期断陷开始向坳陷转化,泉头期—嫩江期为断陷期后热冷却沉降,表现为弱伸展作用,随后进入嫩江末期以挤压作用为主的反转构造发育期。沙河子组、营城组既是主力源岩,又是优质盖层和储层,构成了近烃源自生自储式成藏组合。在沙河子末期、营城末期构造运动形成的大范围的低幅褶皱构造是成藏有利区块。     

应用全球定位系统、太阳光度计和探空仪探测大气水汽总量的对比分析

介绍了应用全球定位系统(GPS)和太阳光度计估算大气水汽总量的方法。大气中的水汽会对GPS信号的传播造成显著的影响,故可以利用GPS观测估算水汽总量或可降水量(PW);在近红外940 nm波段,水汽对太阳直射辐射的吸收作用会直接影响到太阳光度计观测的信号,利用水汽吸收透过率与水汽量的关系,应用太阳光度计的辐射观测资料也可以反演出无云情况下的水汽总量。将锡林浩特观象台2008年5—7月的GPS、CE-318型太阳光度计和探空仪3种观测的水汽量进行了比较,三者对水汽量的变化趋势描述较为吻合,相关系数在0.88以上,说明GPS和太阳光度计都能捕捉到大气中的水汽变化信息;但在水汽量的具体数值上存在差异。统计分析表明:相对于探空来说,GPS-PW稍高于探空值约0.18 g/cm2,太阳光度计PW值则低于探空。太阳光度计便于携带,观测简便;GPS可全天观测无需标定,利用GPS-PW对太阳光度计反演中的模拟参数进行校正是一种可行的方法。     

基于TIGGE资料的集合成员优选方法

利用2007年6月8日—8月31日东亚地区TIGGE集合预报资料中欧洲中期天气预报中心(European Centre for Medium-range Weather Forecasts,ECMWF)和英国气象局(United Kingdom M et Office,UKM O)两个中心的地面2 m气温资料进行集合成员优选研究。结果表明,对于24~96 h预报,集合成员优选方法能够较好地选出预报技巧较高和预报技巧较低的集合成员。个例分析表明,在极端天气出现的地区,优选集合平均的预报优势较为明显。对比ECMWF和UKMO的集合成员优选结果发现,ECMWF的预报效果优于UKMO的预报效果。     

A COMPOSITE STUDY OF RAINFALL ASYMMETRY OF TROPICAL CYCLONES AFTER MAKING LANDFALL IN GUANGDONG PROVINCE

Based on observed rainfall data, this study makes a composite analysis of rainfall asymmetry in tropical cyclones(TCs) after making landfall in Guangdong province(GD) during 1998—2015. There are 3.0 TCs per year on average making landfall in GD and west of GD(WGD) has the most landfall TCs. Most of TCs make landfall in June,July, August, and September at the intensities of TY, STS, and TS. On average, there is more rainfall in the southwest quadrant of TC in CGD(center of GD), WGD, and GD as a whole, and the maximum rainfall is located in the southwest near the TC center. The mean TC rainfall in the east of GD(EGD) leans to the eastern side of TC. The TC rainfall distributions in June, July, August, and September all lean to the southwest quadrant and the maximum rainfall is located in the southwest near the TC center. The same features are found in the mean rainfall of TD, TS, STS, TY,and STY. The maximum rainfall is mainly in the downshear of vertical wind shear. Vertical wind shear is probably the dominate factor that determines asymmetric rainfall distribution of TCs in GD. Storm motion has little connection with TC rainfall asymmetry in GD.