Application of Generalized Moist Potential Vorticity to the Analysis of a Torrential Rain Case

Considering the non-uniform saturation of the real atmosphere,a diagnostic study of a torrential rain event is performed from the perspective of the anomaly of the generalized moist potential vorticity(GMPV) after introducing the generalized potential temperature into the thermodynamic frame of the real atmosphere. The results show that the anomaly appeared at mid-lower levels of the troposphere when the torrential rain happened.Analysis of the magnitudes and locations of maximum values of the tendency o...     

关于松嫩平原西部地区土的可塑性研究与探讨

本文通过对松嫩平原西部齐齐哈尔、大庆等地粉土及粘性土612组液限与塑限、塑性指数的对比试验数据的相关分析,建立了液限与塑限、塑性指数间的回归方程。回归方程的相关系数分别为0.897、0.931,经验关系高度显著。     

层析法微波辐射计遥感反演云液水含量的二维垂直分布

通过机载双天线微波辐射计的观测数据层析反演出云液水的空间分布是一个有限角度的图像重建问题。为提高这一反问题的适定性, 本文对已有的正则化方法进行了改进: 根据云液水的分布特征选择W1,2空间范数的离散形式作为正则项; 通过数值模拟试验确定双天线仰角的最优设置方案为 (30°, 90°) 等。为避免已有方法中对目标函数进行线性化处理而产生的模型误差, 采用L-BFGS-B算法对非线性目标函数直接求解。按照侧边界内云液水分布是否已知将反演模型分为已界模型和未界模型。已界模型的反演结果表明, 反演误差在8.6%～12.3%之间, 反演图像可以反映出不同云型的结构特征。敏感性试验表明, 影响反演精度的主要因素为投影数据的角度分辨率、 辐射计观测噪声以及侧边界云液水分布的不确定性; 受云液水含量、 正则算子特性及边界因素的综合影响, 不同云型的反演精度存在差异。为使微波辐射计探测云液水分布能够独立于其它探测手段, 本文针对未界模型提出嵌套反演方法。数值模拟试验表明, 嵌套反演方法可以为目标区域的反演提供足够的侧边界信息。     

EVOLUTION OF LIQUID WATER CONTENT IN A SEA FOG CONTROLLED BY A HIGH-PRESSURE PATTERN

On March 16–17, 2008, a sea fog occurred in Dianbai in the west of Guangdong Province and was accompanied by a high-pressure synoptic system. Using comprehensive observation datasets, this study analyzes the evolution of liquid water content during this sea fog and investigates the relationships between liquid water content and the average diameters and count densities of fog droplets, air temperature, wind speed and turbulence exchanges. The main results are presented as follows. (1) The sea fog showed a quasi-periodic oscillation characteristic, i.e., it developed, disappeared and then developed again. (2) During the sea fog, the number of fog droplets changed significantly while the changes in average diameter of the fog droplets were relatively small. The development and disappearance of the sea fog correlated significantly with the fog droplet numbers. (3) The air-cooling mechanism played a significant role in sea fog formation and development. However, the influences of this mechanism were not evident during fog persistence. (4) During sea fog formation, weak turbulence exchanges were helpful for fog formation. During sea fog development and persistence, liquid water content increased when turbulence exchanges weakened, and vice versa. The changes in turbulence exchanges were closely related to the quasi-periodic oscillations observed in sea fog presence.     

花岗岩体系中岩浆阶段金属组分的浓度(英文)

在岩浆阶段 ,富集金属元素最有效的机制是流体熔体的分离。受到硅酸盐熔体中盐的溶解度的限制 ,这种分离实为一个天然结晶过程的产物 ,所以必然发生在岩浆结晶的最后阶段。含氟的花岗岩体系中的矿物相的关系是已知的 ,并已确定了一个宽的液相不混溶区 ,其中也包括霞石标准分子的成分。该体系的不同部分 ,由多种元素在共存的硅酸盐和氟化铝两种熔体间的分配就可以得知。在这些实验中首次确定出元素分配与体系成分间的关系。这些数据也可解释一些经验数据所熟知的地球化学标志的变化。     

Generation and Evolution of Ore Fluids for Porphyry Cu-Au Mineralization of the Santo Tomas II (Philex) Deposit, Philippines

Abstract: The Santo Tomas II (Philex) deposit is a porphyry Cu‐Au deposit, located in the southern part of the Baguio mineral district, Benguet Province, northern Luzon, Philippines. The Santo Tomas II deposit is associated with an intrusive complex consisting of four rock types that are distinguished based on petrography. They are 1) post‐ore clinopyroxene‐bearing hornblende andesite porphyry, 2) ore‐generating hornblende andesite porphyry, 3) hornblende quartz diorite porphyry and 4) porphyritic hornblende quartz diorite. K‐Ar age of hydrothermal biotitization was estimated to be 1.5±0.4 Ma. A number of intrusive bodies having broadly similar petrography and K‐Ar age occur in the vicinity of the Santo Tomas II deposit, such as at Clifton, Ligay (Binang), Bumolo (Waterhole) and Philex Main Camp areas. The intrusions at the Santo Tomas II deposit and in the vicinity are characterized by high X_Mg (Mg/[Mg+Fe] atomic ratio, about 0.7 or higher) of mafic silicate phenocrysts such as hornblende, and high sulfur contents (> 0.2 wt% as SO₃) in accessory microphenocrystic apatite, suggesting a highly oxidizing condition. Sulfur is accommodated dominantly as oxidized species since the crystallization of phe‐nocrysts. Sub‐dendritic rim of tremolitic amphibole on hornblende phenocryst in the ore‐generating andesite porphyry at the Santo Tomas II deposit suggests interaction of magma and aqueous fluid(s) exsolved due to decompression during intrusion. Dissemination of magnetite is associated with hydrothermal biotitization and is followed by sheeted and stockwork quartz veinlets having silician magnetite and rare titanohematite instead of Cu‐Fe sulfides. The silician magnetite‐rich quartz veinlet was formed at f_O2 near the hematite‐magnetite buffer at nearly magmatic temperature, where sulfur dominantly existed as oxidized species such as SO₂. Chalcopyrite and bornite, which commonly exhibit micrographic texture often accompanying Pd telluride and native gold/Au‐rich electrum, are associated with subsequent anhydrite (‐quartz) veinlets and stringers. Both intermediate solid solution (iss) and bornite solid solution (bnss) are thought to have coprecipitated primarily at above 500°C based on fluid inclusion microthermometry and sulfur isotope thermometry applied for anhydrite and associated chal‐copyrite and bornite. The initial iss is considered to have converted to chalcopyrite partly replacing bnss during cooling. The hypersaline polyphase fluid inclusions abundantly found in the sheeted and stockwork quartz as well as anhydrite veinlets with scarce gaseous inclusions suggest that they have been trapped in the two aqueous fluid immiscible region. The western Luzon arc associated with porphyry Cu mineralization is characterized by oxidized hydrous magmatism and shallow emplacement, and by the source of sulfur enriched in ³⁴S.     

Liquid Immiscibility of Boninite in Xiangcheng, Southwestern China, and Its implication to Genetic Relationship between Boninite and Komatiitic Basalt

Boninitic rocks and associated high-magnesian basalt and high-iron tholeiite in the Xiangcheng area constitute the basal horizon of the arc volcanic sequence in the Triassic Yidun Island-Arc, southwestern China. The boninite occurs as pillow, massive and ocellar lavas; the last one possesses well-developed globular structure and alternates with the former two. The boninite is characterized by the absence of phenocrysts of olivine and low-Ca pyroxenes and by low CaO/Al2O3 ratios (<0.67) and high Cr (>1000 ppm) and Ni (>250 ppm). The normalized abundance patterns (NAP) of trace elements to primitive mantle are similar to the NAP of low-Ca modern boninites and SHMB in the Archaean and Proterozoic.As a mechanism of ocellar texture, liquid immiscibility in boninite is supported by the following lines of evidence: (a) sharp contact between ocelli and matrix, (b) constant volumetric ratios of ocelli/matrix and common coalescence of ocelli in ocellar rocks, (c) identical micro-spinifex textures and mineral asse     

多钨酸钠超声高速离心法——分离提纯微细矿物的新方法

多乌酸钠是一种无毒、无气味、易溶解、易配制、稳定性好、回收率高、使用方便安全的新型无机重液，其密度变化范围为1．0g/cm^3-3.1g/cm^3，分离缙云沸石和粘土矿土矿物取得了良好的效果。详述了多钨酸钠溶液的配制和回收，分离缙云沸石和粘土的实验流程及其应用前景。     

地球化学模拟及其在水文地质中的应用

从正向地球化学模拟、反向地球化学模拟和水文地球化学模拟三方面系统概述了地球化学模拟的研究进展；结合笔者近年来的科研实践，对其在水文地质中的应用作了介绍，并着重讨论了地下水化学组分存在形式、矿物饱和指数的计算、水化学组分测量及地下水地球化学演化等方面的应用；最后，指出了这一领域中当前存在的问题和今后的研究方向。     

察尔汁盐湖抽卤过程中晶间卤水氚含量变化趋势的研究

本文将氚的测定方法应用于察尔汗盐湖抽卤过程中晶间卤水氖含量变化趋势的研究，以多次的测试数据研究和探讨了大气降水、周边水、地下水对察尔汗盐湖晶间卤水的影响，特别是开渠后湖水对晶间卤水的影响，从水平和垂直两个面讨论察尔汗首采区晶间卤水氚含量的变化规律。