聊古1井在不同取水模式下气体观测效果的对比分析

为解决聊古1井断流问题,聊城地震水化试验站先后引进、开发了人工激发引流观测技术和潜水泵变频稳流抽水技术.对天然自流观测系统、人工激发引流观测系统和潜水泵变频稳流抽水观测系统等3种不同取水模式下产出的气体观测数据进行一致性分析.结果表明,人工激发引流观测系统下气体观测动态特征年变比较明显,潜水泵变频稳流抽水观测系统下气体观测动态特征与天然自流状态下的动态特征基本一致.     

2010年1月12日海地 Mw7.0地震InSAR同震形变观测及同震滑动分布反演

2010年1月12日GMT时间21时53分,在海地境内(72.57°W,18.44°N)发生了Mw7.0地震.文中利用干涉合成孔径雷达(InSAR)方法获得了覆盖整个震区的高精度形变观测资料,用以研究该地震的发震机理.采用ALOs PALSAR数据,分析了轨道、大气等误差源对干涉信号的影响,最终获得了雷达视线向(LOS...     

Predicting size effect on diffusion-limited current density of oxygen reduction by copper wire

The size effect of copper wire radius (0.04–0.82 mm) on the diffusion-limited current density of an oxygen reduction reaction in stagnant simulated seawater (naturally aerated 0.5 mol/L NaCl) is investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) and compared with the results obtained in 0.5 mol/L H2SO4. In the oxygen diffusion-limited range, size effect is found to occur independent of electrolytes, which is attributed to non-linear diffusion. Additionally, to satisfy application in a marine setting, an empirical equation correlating oxygen diffusion-limited current density to copper wire radius is proposed by fitting experimental data.     

Effects of sand grain size and morphological traits on running speed of toad-headed lizard Phrynocephalus frontalis

We conducted a manipulative experiment to investigate the influential factors of locomotor ability in steppe toad-headed lizards. By using a video-base method, we measured running speed of the lizards when they run on sands of different grain sizes. We also considered body condition, tail length and sex as fixed factors to analyze their effects on running speed of the lizard. Results showed that running speed of the lizard significantly differed among different trials of sand grain size. Specifically, the peak and the nadir values of the running speed were found on sands of 0.5-1 mm and 0.075-0.25 mm grains, respectively. When lizards ran on sands of different grain size their running speed changed significantly. Body condition and tail length also had significant effects on running speed. The findings indicated that locomotor ability of lizards depended on both body condition and the external environment. We hypothesized that sand grain size is one of the factors that influence the habitat selection in steppe toad-headed lizards. Moreover, this lizard may be used as an indicator of the development of sand dunes.     

阿拉伯海超级气旋风暴“查帕拉”（2015）快速加强过程中环境场特征

利用美国联合台风警报中心(JTWC)发布的北印度洋热带气旋数据、NOAA 0.25 °×0.25 °逐日OISST资料以及ERA5提供的0.25 °×0.25 °逐小时的再分析资料分析了阿拉伯海超级气旋风暴“查帕拉”（2015）快速加强过程中的环境场特征,结果表明：较常年平均偏暖3.0~3.5 ℃的暖水区,为“查帕拉”的快速加强提供了水汽和能量条件;“查帕拉”北侧的副热带西风急流和南侧的高空出流通道的建立是其快速加强的重要高空强迫条件,高层辐散风的增强促进质量流出形成强上升运动,这也伴随着旋转风动能的快速增长;在“查帕拉”快速增强时段,高层150 hPa以上存在显著的正位涡异常,高层的正位涡异常能够调整引起低层气旋性环流加强,同时中层400 hPa有显著的正位涡平流输入,正涡度在垂直方向快速增长,300 hPa附近显著增暖,内核区的垂直对流运动达到最强。     

阿尔金—祁连—昆仑造山带早古生代构造格架及结晶岩年代学研究进展

阿尔金—祁连—昆仑(阿祁昆)造山带早古生代加里东期的构造事件一直是国内外研究的热点,近年来发表了大量的研究成果。本文着重调研了各造山带内构造混杂带的重要组成部分——蛇绿岩、岩浆岩和高压—超高压变质岩的地球化学特征,尤其是同位素年代学资料。蛇绿岩的地球化学特征表明阿尔金—祁连—昆仑地区早古生代的蛇绿岩有MORB和OIB两种类型,其产出于成熟的洋盆、小洋盆或是与消减带有关的弧前或弧后盆地,还有很大的争议。根据大量的同位素年代学资料,阿尔金—祁连—昆仑地区洋盆在晚新元古代开启,寒武纪发育成熟,于中—晚奥陶世开始发生俯冲消减作用,晚志留世—早泥盆世进入碰撞后伸展阶段。再者,通过同位素年代学数据对比,证明北阿尔金与北祁连、南阿尔金与柴达木北缘、西昆仑与东昆仑在早古生代分别为同一条构造带,于新生代期间被活动的阿尔金左行走滑断裂错开了400多千米。     

Carbon cycle in the epikarst systems and its ecological effects in South China

The carbon cycle in a global sense is the biogeochemical process by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the earth. For epikarst systems, it is the exchange of carbon among the atmosphere, water, and carbonate rocks. Southern China is located in the subtropical zone; its warm and humid weather creates favorable conditions for the dynamic physical, chemical, and ecological processes of the carbon cycle. This paper presents the mechanisms and characteristics of the carbon cycle in the epikarst systems in south China. The CO₂ concentration in soils has clear seasonal variations, and its peak correlates well with the warm and rainy months. Stable carbon isotope analysis shows that a majority of the carbon in this cycle is from soils. The flow rate and flow velocity in an epikarst system and the composition of carbonate rocks control the carbon fluxes. It was estimated that the karst areas in south China contribute to about half of the total carbon sink by the carbonate system in China. By enhancing the movement of elements and dissolution of more chemical components, the active carbon cycle in the epikarst system helps to expand plant species. It also creates favorable environments for the calciphilic plants and biomass accumulation in the region. The findings from this study should help in better understanding of the carbon cycle in karst systems in south China, an essential component for the best management practices in combating rock desertification and in the ongoing study of the total carbon sink by the karst flow systems in China.     

Comprehensive Utilization of Vanadium–Titanium Magnetite Deposits in China Has Come to a New Level

There are two production areas for vanadium-titanium magnetite deposits in China:the Panzhihua area in Sichuan Province and the Chengde area in Hebei Province. The Panzhihua vanadium titanomagnetite iron ore deposits are hosted by a mafic-ultramafic intrusive complex,and belong to late magmatic differentiation condensation of crystalline iron deposits.The rock mass is characterized by good differentiation,clear and differentiated facies zones and rhythm.The rock assemblage can be divided into the following rock facies combination:gabbro,gabbro-norite,gabbro troctolite,gabbro-plagioclase,gabbro-eclogite-olivine pyroxenite,and diabase types.The orebodies occur mostly as close-bedded,distributed in the dark facies zone in the bottom layers of the middle or lower part of the stratiform rock mass.The main ore minerals are granular ilmenite,magnetite,ilmenite spar,and magnesium aluminum spinel,with small amounts of pyrrhotite,pyrite and cobalt,nickel and copper sulfide.The ores have siderite and mosaic textures and occur as compact massive,banded and disseminated structures;they consist of TFeO 20％-45％,TiO2 3％-16％,V2O50.15％-0.5％,Cr2O30.1％-0.38％,associated with trace amounts of Cu,Co,Ni,Ga,Mn,P,Se,Te,Sc and Pt group elements.     

Aftershock of the Wenchuan Earthquake in Sichuan Triggers Large Earthquake in Minxian County, Gansu

Because of the confining compression of the Pacific,Eurasian and Indian plates,the Chinese mainland is frequently stricken with earthquakes,especially in the Qinghai-Tibet Plateau and surrounding areas and along the NS-trending tectonic zone from Yinchuan to Lanzhou,Chengdu,and finally to the Kunming tectonic belt (Fig.1).Historical records show that there are 14 earthquakes of＞Ms 8 occurring in the two regions,eight of which occurred along the latter tectonic belt.The 2008 Wenchuan earthquake located on both the NS tectonic zone and the Longmenshan fault zone along the eastern margin of the Qinghai-Tibet Plateau.     

4种石斑鱼染色体核型研究

以蜂巢石斑鱼(Epinephelus merra)、鲑点石斑鱼(Epinephelus fario)、点带石斑鱼(Epinephelus malabaricus)及黑边石斑鱼(Epinephelus fasciatus)为材料,胸腔注射PHA及秋水仙素溶液,取头肾细胞经空气干燥法制片。经核型分析,蜂巢石斑鱼与鲑点石斑鱼核型一样,2n=48=4m 6sm 4st 34t,NF=62;点带石斑鱼与黑边石斑鱼的核型一样,2n=48=48t,NF=48。由染色体数目2n=48可知,4种石斑鱼在鱼类系统中划分为高位类;由核型组成不同,可以将4种石斑鱼分为两大类：蜂巢石斑鱼与鲑点石斑鱼属于一大类;点带石斑鱼与黑边石斑鱼属于另一大类。此外,按总臂数多少来分,蜂巢石斑鱼与鲑点石斑鱼为特化类群：点带石斑鱼与黑边石斑鱼为原始类群。