利用电测深资料研究疏勒河流域中下游盆地的第四系

依据地层电性差异,研究河西走廊疏勒河流域中下游平原区的诸第四纪盆地中的第四系,提出了准第四系厚度的概念.用电测深资料推断了诸盆地的准第四系厚度、岩性结构、隐伏构造等,为该地区地下水勘查提供了基础性资料.     

鄂尔多斯盆地演化与多种能源矿产分布

鄂尔多斯盆地是中国有机—无机多种能源矿产共存的盆地之一。有机矿产包括煤、油气、煤层气等,分布于盆地内部,无机矿产以铀矿为主,处于盆—山转换部位。盆地边缘的造山活动控制了内部基底变形,基底变形又制约了盖层构造格局的演化,而后者决定了盆内有机矿产的源、运、储过程,如烃源岩展布、煤级分布等。造山活动和盆地演化共同制约着砂岩型铀矿的产出,油气在水平挤压和上覆地层压实作用下自内而外、自下而上输运,而于周缘造山带形成的含铀中低温无机成矿热液,在重力作用下,沿渗透率较大的透水层自上而下向盆地内部输运,还原性油气与氧化性含铀热液在盆—山过渡处相遇,导致无机流体的关键性物理化学参数的转变,使铀元素沉淀富集。鄂尔多斯盆地多种能源矿产共存系统存在的必要条件是成矿(藏)作用的发生具备各自成矿要素,且无机成矿和有机成藏两种性质完全不同的地质过程之间存在耦合作用。     

Geoelectromagnetic and geothermic investigations in the Ihlara Valley geothermal field

The Ihlara Valley is situated within a volcanic arc that is formed by the collision of the eastern Mediterranean plate system with the Anatolian plate. In this study we will present data from a reservoir monitoring project over the Ihlara-Ziga geothermal field, located 22 km east of Aksaray, in central Anatolia.Although identified geothermal resources in the Ihlara Valley are modest, substantial undiscovered fields have been inferred primarily from the volcanic and tectonic setting but also from the high regional heat flow (150–200 mWm⁻²) on the Kir ehir Massif.In 1988 and 1990, geoelectromagnetic surveys were undertaken by MTA-Ankara to confirm the presence of a relatively shallow (≈ 0.5–1 km), hydrothermally caused conductive layer or zone. CSAMT and Schlumberger resistivity data show good correspondence with each other, and 2-D geoelectric models are also in harmony with geologic data and gravity anomalies.The depth of the resistive basement, which is interpreted as Paleozoic limestone, is 200–250 m in the western part and increases eastward (≈ 600–750 m). This may imply N-S-oriented normal faulting within the survey area. The parameters of the top layer are a resistivity of 25 to 95 ohm m and a thickness of between 100 and 250 m. The thickness of the conductive tuffs between the top layer and the basement, whose resistivity is about 4–5 o hmm, also increases eastward (from 100 to 450 m). The apparent resistivity maps for the frequencies between 32 and 2 Hz reveal a localized low resistivity anomaly to the east of Belisirma.     

北祁连~河西地区重力变化特征分析

通过对北祁连～河西地区重力变化的分析，认为重力变化由缓慢下降发展为快速下降，并形成重力变化高梯度带，同时大面积地形变和断层水准变化显示为由急剧上升转变为缓慢下降，表明该地区已进入应力积累的中期阶段，应密切监视其发展变化     

河西走廊开阔地低空风和温度场特征分析

河西走廊大气扩散试验结果表明，河西地区冬季低空风场变化具有明显的周期性，温度场具有逆温频率高，逆温层深厚，逆温生消规律强的特性。     

中原城市群与郑州大都会建设的战略思考

鉴于地域经济向心成长的客观规律和我国实施“梯度开发、东靠西移”总体战略的必然要求；国家和河南省应着力加快建设并依托以郑州为核心的中原城市群，构筑中原都会带，催育郑州特大都会，即建设大郑州。建议国家在此设立内陆中原经济开放区和经济特区，催促中原特大区域经济重心和核心区的形成，促进中原经济的崛起和我国中西部的开放开发。     

河西走廊东部晚古生代前陆盆地演化特征

河西走廊东部晚古生代前陆盆地从形成、稳定发展到收缩消亡的过程，反映了泥盆纪是主要成盆期，奠定了盆地的基本格架；石炭纪是盆地稳定发育阶段，也是盆地内煤、油气的主要形成期；自二叠纪至三叠纪，前陆盆地应变停止，应力粘弹性松驰，被重力作用下的山前盆地所取代。     

河西地区几次强震前的垂直地形变分维特征研究

采用关联维的计算方法,对河西地区门源6.4级和天祝一景泰6.2级地震过程中的垂直地形变序列的时、空分维数分别进行了计算,得到:本文研究区内远场(远离震中区)的地形变序列分维数在0.63～0.80之间,而近场(震中地区)的序列分维数在0.17～0.44之间,近场出现明显的降维现象;地震的孕、发过程中地形变观测序列分维数在0.22～0.37之间,而无震期间则在0.57～0.77之间,地震孕、发过程中地形变观测时间序列亦存在明显的降维现象。     

河西走廊城镇地貌特征分析与开发评价

本文阐述了河西走廊城镇的地貌特征,从建设开发的角度分析评价城镇地貌特征并提出了今后合理发展的方向与对策。     

Statistical Comparison of Geophysical Parameters and Seismicity in Central Italy

Geological and geophysical data of an area of central Italy have been used for statistically comparing with the distribution of the mean seismic deformation. This parameter has been calculated by adding the square root of the energy released by earthquakes inside a cell, the dimensions of which have been fixed after performing an analysis of spatial autocorrelation. Underground temperatures, fault length, and topographic altitude showed a good single linear correlation with seismicity. Factor analysis has been employed to reduce the number of original variables, taking into account their mutual correlation; then, with the new uncorrelated variables, a good multiple linear correlation has been found, considering seismic deformation as a dependent variable.The analysis of residuals for the multiple regression shows the existence of areas with different seismic activity than predicted by the model: a discussion of the residuals pattern follows, considering the geological setting of the area.