利用位场及其高阶导数的功率谱计算岩层的深度与厚度

本文导出了利用重力与磁异常及其高阶导数的功率谱计算密度体和磁性体上顶与下底埋深的近似公式,还提供了利用垂向或水平导数谱计算深度的方法。理论模型的试验结果表明,由近似公式计算的精度可以满足实际需要。本文最后根据一条重力剖面资料,计算了密度层上、下界面。     

剩磁-温度谱与冷却模式

本文解释热剩磁和粘滞剩磁的阻挡过程。较慢冷却伴随较低的阻挡温度。一组同一的磁颗粒,其实验室解阻温度不一定等于其磁化成分的阻挡温度。冷却速率不同,重排剩磁量会不同,两者的关系与磁畴状态有关。距烘烤体不同距离采集磁颗粒分布相同的围岩样品,在一定场合下,根据其剩磁-实验室解阻温度谱所示的重排剩磁量的差别,可讨论冷却速度及模型。本文列举苏格兰某些围岩的不同重排剩磁量,讨论有关问题。     

Global spectra of energy and enstrophy and their fluxes during July 1979

Transient and stationary spectra of kinetic energy (KE), available potential energy (APE) and enstrophy (EN), and their spectral fluxes as a function of the two-dimensional wavenumbern were computed for July 1979. Triangular truncation at zonal wavenumber 42 was used for computation. The slopes of various spectra in the wavenumber range 14≤n≤25 were obtained by fitting a straight line in log-log scale by the least square method. The transientKE, APE andEN spectra in the lower (upper) troposphere had slopes −2·21 (−2·30), −2·65 (−2·64) and −0·36 (−0·46), respectively. The effect of stationary and divergent motion on the slope values was investigated. The possible correlation between the slope and percentage of transient component in the combined energy and enstrophy was examined to identify the transient motion of the atmosphere with the two-dimensional homogeneous isotropic turbulence. The vertically averaged slope of kinetic energy and enstrophy in the lower (upper) troposphere was close to the value at 700 (200) hPa level. The spectral fluxes of kinetic energy and enstrophy in the wavenumber range 14≤n≤25 satisfied, to a very rough approximation, the criteria of inertial subrange. The stationary fluxes were small. The estimated stationary-transient component of flux was larger, comparable and less than the corresponding transient flux of APE, KE and EN. Representative levels for computation of energy and enstrophy spectra and their fluxes in the lower and upper troposphere were identified.     

红外光谱方法在找金中的应用综述

从四个方面介绍了红外光谱在金矿普查评价中的应用：石英薄片中气液包裹体与金的关系研究；石英中杂质阳离子与金的关系研究；黄铁矿与金的关系研究；金矿区氧化带和矿带共生组合矿物研究。     

ESR assessment of kerogen maturation and its relation with petroleum genesis

Petroleum hydrocarbons are formed by breakdown of kerogen preserved in source rocks throughout the process of catagenesis. This process is accompanied by free radical generation in kerogen. The availability of measuring free radicals in kerogen using ESR to deduce a maturation estimation of potential source rocks has been hindered due to the presence of the solvent-extractable organic molecules (SEOM) trapped within the kerogen matrix. Spin concentration (Ns) of the kerogen treated with pyridine (K_Py) represents the paramagnetic centers of the kerogen matrix itself and provides a potential parameter to evaluate kerogen maturation.     

对中国大陆区域地磁场提取的认识

本文从球谐函数理论的物理含义、中国地磁数据的分布情况及实际计算结果的分析,提出对当前用球谐函数拟合法提取中国大陆区域地磁异常的几点认识。     

乌恰地震加速度记录特征研究

研究了1985年乌恰余震取得的加速度记录,从地质及地球物理的角度探讨一些加速度异常点。分析了记录的峰值加速度与震害及场地烈度的对应关系。对比了竖向和水平向加速度、速度反应谱及谱与震级的变化特征。     

Theoretical research on intensity envelope function of strong ground motion

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CHARACTERISTICS OF TURBULENCE SPECTRA IN DIFFERENT WEATHER PROCESSES UNDER UNSTABLE CONDITIONS*

In this paper,the data chosen from measurements by supersonic anemometers in Tongxian County of Beijing in 1990 are used to study characteristics of turbulence spectra in precipitation weather.Some turbulence parameters such as turbulence intensity,heat and momentum fluxes,friction velocity,M-O length and stability parameter are calculated and their dependence on turbulence spectra in different stability conditions are analyzed.Some encouraging results are obtained and compared with others' results.     

冲、爆、钻复合性钻进工艺在大滚石、孤石桩孔中的应用

在大口径工程施工中，采用以往一般方法对付某些特殊复杂地层效果欠使。本文所介绍的采用钢丝绳冲击钻迸、爆破与硬质合金回转钻进（即冲、爆、钻）相结合复合性钻进工艺，基本解决了在大滚石、孤石桩孔中难以施工的问题。