鲁西茌平背斜构造带的演化及其古生界原生油气勘探前景

鲁西茌平背斜构造带被夹持在东侧寿张凹降和西侧监清坳陷的莘县凹陷之间,处于“凹中之隆”的有利勘探位置。该构造带的演化受西侧兰聊断裂活动的严格控制,晚三叠世,该断裂的产生接开背斜带演化的序幕。兰聊断裂的燕山期具右旋平移性质,使区内北北东向次级正断层发育,构造带基本定型。该带是相邻两凹限油气运移的主要指向地区,两凹陷内含下古生界开阔（局限）海相烃源岩和上古生界煤系源岩;带内下古生介顶部风化壳为良好储层;     

在97.8GHz处测量地球大气的不透明度

用研制的全自动辐射计在97．8GHz上测量南京市内大气的不透明度以及这种不透明度随时间的变化．辐射计记录大气在不同天顶高度的辐射温度,由此测出天顶方向的大气不透明度。在56小时的测量时间内,取得了1400多组数据,拟合得到了在观测时段内天顶方向的大气不透明度在0．2至0．7之间,典型值为0．4,表明测试地点的大气条件允许进行3mm波段的射电天文观测．由于在工作频段内大气不透明度的主要来源是对流层水汽的吸收,测量的不透明度可用来直接反映大气内水汽的含量,并实时校准大气吸收．     

Geodynamic interpretation of the earthquake distribution in the kermadec subduction zone

Summary The morphology of the Wadati-Benioff zone in the Kermadec region, based on the distribution of 1100 earthquake foci, verified the existence of an intermediate aseismic gap and its relation to active andesitic volcanism, and the non-uniformity of subduction due to the hampering effect of the main structural features of the subducting Pacific plate. Two cycles of the recently active subduction in the Tonga-Kermadec island arc were found.     

Numerical modelling in laterally inhomogeneous geoelectrical structures

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Dedicated to RNDr. Jan Pícha, CSc., on his 60th Birthday     

Elastic properties of eclogite rocks from the Bohemian massif

Summary Compressional velocity anistropy has been studied in detail at atmospheric pressure for 78 specimens of 23 types of eclogite rocks from the Bohemian massif. For nine of these rock types, compressional and shear velocities were measured as a function of pressure to750 MPa at room temperature. The velocity anisotropy for both compressional and shear waves is less than4% at high pressure. The velocities increase with increasing garnet content and decrease with increasing symplectitization. The Moldanubian eclogites have significantly higher velocities, on the average, than the eclogites from the Kruné hory crystalline complex, although the densities of both groups are comparable.     

Isoseismals of the strongest Friuli aftershocks of September 1976

Summary Isoseismal maps of the three strongest Friuli aftershocks of September 1976 were compiled using the contributions from European countries within the shaken area. The characteristic features of the macroseismic fields are discussed.     

Spectral analysis of oscillations with a time-variable frequency

Summary The paper presents a method of evaluating oscillations with a time-variable frequency using a computer. The given function is first interpolated at points which are not distributed equidistantly in time, but the digitizing step varies with time according to a known optional regularity. The spectrum of the obtained function is computed for various of these interpolations and tests are run to determine when the interpolation best compensates the time variation of the frequency. The initial and terminal frequency in the given sample is then determined. The usability of this method with respect to various types of oscillations with a variable frequency and its accuracy in comparison to sonagrams are discussed.