福建武平地区桃溪群混合岩U-Pb定年及其Hf同位素组成:对桃溪群时代及郁南运动的约束   总被引：4，自引：2，他引：2  

张爱梅  王岳军  范蔚茗  张菲菲  张玉芝 《大地构造与成矿学》2011,35(1):64-72

桃溪群混合岩位于南岭东段武夷山褶皱带南段.本文通过采自桃溪附近帽村-田园两个代表性花岗片麻岩样品进行LA-ICP-MS锆石U-Pb 测年获得494～496Ma的结晶年龄,641～657Ma和799Ma两组继承锆石的206Pb/238U 表观年龄.同时对样品FJ-137进行的Hf同位素测定表明其εHf(t)变化于-2.3...  相似文献   

江南隆起带中段新元古代花岗岩锆石U-Pb年代学和Hf同位素组成研究   总被引：5，自引：1，他引：4  

张菲菲  王岳军  范蔚茗  张爱梅  张玉芝 《大地构造与成矿学》2011,35(1):73-84

对江南隆起带中段湘东西园坑岩体和赣西九岭岩体的LA-ICPMS锆石U-Pb年代学测定和LA-MC-ICPMS锆石Hf同位素原位分析测试表明:西园坑岩体形成于(804±3)Ma,赣西九岭岩体的年龄为(813±4)Ma和(823±2)Ma,均为新元古代花岗岩.上述三个样品的εHf(t)的加权平均值分别为0.68±0.71,...  相似文献   

塔里木盆地柯坪地区奥陶系鹰山组台内滩储层地层特征对比研究:以石灰窑和大湾沟剖面为例          下载免费PDF全文

胡晓兰  樊太亮  于炳松  高志前  王建平  李让彬 《地学前缘》2011,18(3):339-346

塔里木盆地碳酸盐岩礁滩体储层已经成为当前油气勘探的热点.以塔里木盆地柯坪地区石灰窑和大湾沟露头剖面为例,对奥陶系鹰山组台内滩地层的岩相组成及层序地层特征两个方面进行深入对比研究,并在此基础上分析了碳酸盐岩台内滩地层发育的控制因素.结果表明:(1)石灰窑地区和大湾沟地区鹰山组地层发育特征存在差异,石灰窑剖面以薄层颗粒灰岩...  相似文献   

基于城市化的中国能源消费前景分析及对碳排放的相关思考   总被引：3，自引：0，他引：3  

樊杰  李平星 《地球科学进展》2011,26(1):57-65

工业化和城市化是中国未来的两大发展趋势.以往对中国未来能源消费及碳排放的预测大都是从工业化层面出发,忽略了城市化过程导致的生活能源消费的巨大增量.推动城市化进程是提升生活质量、满足人的基本权利的重要手段;立足城市化进程,保障人均能源消费及碳排放空间是确保人人享有基本的生存权和发展权的重要基础.从对中国城市化进程的发展态...  相似文献   

Development of 57 novel polymorphic microsatellite markers in half-smooth tongue sole (Cynoglossus semilaevis)     

Guidong Miao  Ying Xu  Di Wang  Songlin Chen  Tingjun Fan  Yongsheng Tian 《中国海洋大学学报(英文版)》2011,10(3):241-245

Half-smooth tongue sole (Cynoglossus semilaevis) is a promising species for aquaculture in China.The wild population of C. semilaevis is under threat from environmental factors. Microsatellite markers are very suitable for assessing genetic diversity. Four microsatellite-enriched libraries of half smooth tongue sole (Cynoglossus semilaevis) were constructed,from which 57 polymorphic microsatellites were isolated and characterized.The polymorphism of these microsatellites was assessed by genotyping in 30 ind...  相似文献   

基于信息量模型的玉树地震次生地质灾害危险性评价   总被引：1，自引：0，他引：1  

牛全福  程维明  兰恒星  刘勇  颉耀文 《山地学报》2011,29(2)

2010-04-14发生在青海省玉树的Ms7.1级地震引发了大量的地质灾害.基于GIS技术和信息量模型方法,以坡度、坡向、高程、坡形、地貌类型、断层距和地层岩性为评价因子,通过空间分析计算各因子的信息量,分析地质灾害在各因子中的空间分布特征,对各评价因子图层进行空间建模,将获取的信息量图划分为高度、中度、轻度三级危险区,通过遥感解译研究区实际滑坡分布,与危险性分布图叠加表明:本次研究得出的危险等级与实际的滑坡发生情况相吻合,为灾区重建提供参考依据.  相似文献   

汶川地震灾后重建地区的人口容量分析     

高晓路  陈田  樊杰 《地理学报(英文版)》2011,21(3):521-538

Assessment of population carrying capacity is a key task in the reconstruction planning of areas struck by disasters, in which the precision of estimation is required. This study developed a decision-making model for estimating the population capacity of the involved townships and cities in the 2008 Wenchuan Earthquake based on the assessment of the suitability for reconstruction of the areas. Through analysis, arable land resources were argued to be the critical constraint of population capacity in these areas. Then, the spatial differentiations of the post-quake development conditions across different regions were analyzed with respect to their natural environments, socio-economic development and quake damages. The expected levels of urbanization, family incomes and income structures, output levels of land, and the reliance of agricultural population on arable land were estimated by different regions. With these parameters, the population capacities of the involved townships and cities in three scenarios were estimated. The total population capacity of the entire areas is abundant compared with the actual post-quake population; however, the status of over-population substantially varies across space. It was suggested to put the emphasis of post-quake resettlement policy on those counties where earthquake had been the main causes of over-population. In the Full Recovery Scenario, three mountain counties were identified including Wenchuan, Beichuan and Maoxian, with a total over-population of about 100,000 people.  相似文献   

真鲷（Pagrus major）vasa基因5′端启动子克隆及表达载体构建          下载免费PDF全文

林帆  刘清华  李军  隋娟  肖志忠  徐世宏  马道远  肖永双 《海洋与湖沼》2011,42(2):186-192

采用染色体步移（Genome walking）的方法克隆了真鲷vasa基因5′侧翼序列,采用生物信息学方法分析潜在的顺式作用元件,并与斑马鱼核心启动子进行比对,在此基础上构建了绿色荧光蛋白表达载体。序列分析结果显示：克隆得到的真鲷vasa基因5′侧翼序列序列长度为2762bp,其中包括TATA-box、CAAT-box...  相似文献   

Low-frequency variability of the North Equatorial Current bifurcation in the past 40 years from SODA   总被引：1，自引：1，他引：0  

MENG Qingji  WANG Fan  LIU Na 《海洋学报(英文版)》2011,30(3):14-19

The low-frequency variability of the North Equatorial Current (NEC) bifurcation during 1958 to 2001 was investigated with the Simple Ocean Data Assimilation (SODA) 2.0.2 dataset.In agreement with recent observations,the NEC bifurcation latitude (NBL) shifted northward as depth increases, from about 12.7°N near the surface to about 17.1°N at depths around 500 m for the annual average. This study reveals that the interannual variations of NBL,with five years period,mainly focused on the upper 500 m with amplitude increasing as depth increased.The NBL shifted southward in the past 40 years,which was more significant in the subsurface at more than -0.02°/a.The NBL manifests itself in the transports of NMK (NEC-Mindanao Current (MC)-Kuroshio) system in strong relationship with MC (0.7) and Kuroshio (-0.7).The EOF analysis of meridional velocity off the Philippine coast shows that the first mode,explaining 62% of variance and 5 years period,was highly correlated with the southward shift of NBL with coefficient at about 0.75.The southward shift of NBL consists with the weakening of MC and strengthening of Kuroshio,which exhibited linear trends at -0.24Sv/a and 0.11Sv/a.Both interannual variation and trend of NBL were closely related to the variation of NMK system.  相似文献   

临沂市兰山区城乡建设用地增减挂钩工作探讨     

冯帆  谭晓彤  杜骁  艾文晖  周冉 《山东地质》2011,(5):42-45

城乡建设用地增减挂钩是改善农村生产生活条件和环境,实现城乡统筹,建立城乡统一的土地市场的必然要求。通过对临沂市兰山区的分析,在对＂挂钩政策＂实施中存在的问题分析的基础上,得出＂挂钩政策＂应遵循的基本原则,提出了在挂钩政策下的一条切实可行的操作模式,并依此提出政策建议,为政府决策提供了依据,使其为新农村建设做出更大的贡献。  相似文献