新疆地倾斜地震短期异常特征研究

利用常规分析方法研究了新疆部分4级和5级以上地震前地倾斜资料所出现的短期和临震异常变化,统计了异常开始至发震时间、异常持续时间、异常结束至发震时间、异常量级及异常形态等,通过对典型震例的剖析得出了中强地震和远场强地震前的地倾斜短期异常特征。在地震前的短临阶段,异常的项数和异常量级急剧增加;震级不同,异常起始时间和发震的优势时段也有所不同。     

RESPONSE OF THE ATMOSPHERIC GENERAL CIRCULATION TO WINTER SNOW COVER ANOMALY*

In this paper,the response of the atmospheric general circulation to winter anomalous snow cover was investigated through observations studies and model simulation.Results from the observations show that:(1)the anomalous winter snow cover in the extratropics of Eurasian Continent bears an intimate relation to the contemporary atmospheric general circulation.The positive anomaly of winter snow cover is usually accompanied by positive atmospheric EUP teleconnection pattern and stronger East Asian winter monsoon:or vice versa.(2)The linkage between them suggests that the abnormal winter snow cover has an important impact on winter atmospheric general circulation.The anomalous snow cover pattern can lead to the anomaly of winter atmospheric EUP teleconnection pattern and thus influence East Asian Winter monsoon.With NCAR CCM2 including BATS land surface scheme,three groups of experiments were performed to examine the atmospheric response to the anomalous snow cover pattern and explore the relevant mechanism.Simulated results agree well with the observations,which testify the significant response of the atmosphere to snow cover anomaly.It is found that the radiative cooling induced by anomalous snow cover plays an important role in above processes,and the feedback of long-wave radiation can not be neglected.     

磁偶极子存在时导电水平圆柱体的场

将磁偶极子在导电水平圆柱体的场分解为单磁极的一次场、二次场、柱内场、柱外场。然后,由两个单磁极的场叠加而得到磁偶极子的场,并编程序对总场的频率响应函数的虚实分量二次磁场分别做了计算。     

关于区域磁异常反演问题的统计分析方法

提出并全面介绍了哎域磁异常反演的一种统计分析方法。包括该方法的地质和地球物理基础，统计参数，统计方法的稳定性和唯一性的讨论，以及在国内外的应用效果，该方法能够很好地反演出平均界面深度和进行地质填图工艺。其研究成果为地球动力学的发展开辟了新的领域。     

电磁波异常幅值与震中距的相关性

介绍了利用ＭＤＺＱＹ型地震前兆预测仪测得的震前电磁波异常幅值大小计算未来地震震中距的３种方法－异常值换算法，数据类比法和对数坐标量板法，并给出了四川、西藏和台湾３次地震的计算实例。     

Anomalous induction zones in the Czech Republic in relation to large scale european anomalies

Summary Induction response has been investigated at 57 field stations covering the Bohemian Massif (BM) and the Bruno-Vistulicum (BV), and at 93 temporary observing sites across the West Carpathians (WCP). Induction response data at 958 localities covering mainly the Central European area were also collected and analysed. Components of transfer functions (TF), moduli and arguments of corresponding induction vectors are analyzed for individual profiles. Pseudo-sections of induction parameters at profiles are used to visualize the period dependence of induction response and computer generated contour maps of TF components define zones of anomalous induction and their relation to large scale anomalies. Depths of anomalous field source are estimated by separating variations into internal and external parts. Correlations among induction response characteristics and the results of other geophysical investigations are discussed.     

地质异常理论在找矿靶区优选与评价中的应用──以新疆“305”项目《阿其克布拉克－梧桐沟－带金铜成矿靶区优选与评价》为例

地质异常是地壳演化过程中构筑的特殊空间实体，它的存在是矿床形成的必要条件，圈定地质异常有利于缩小找矿靶区和明确找矿目标。应用这一理论在新疆＂３０５＂项目研究中收到了良好的找矿效果。     

瞬变电磁法对地下不同位置多个三维薄板探测能力的研究

以层状地层中多个位于不同位置和不同埋深的三维导电薄板为例,对瞬变电磁(TEM)法分辨地下多个三维异常体的能力进行了详细的分析和讨论.模型计算的结果表明,无论异常体与源的距离远近,TEM法对近地表的多个异常体分辨能力总是很好.当多个异常体在垂直方向排列时,TEM法对它们的探测能力最差;当它们以不同埋深沿测线方向排列时,埋深最浅和最近源的异常体最容易探测到;当夹在中间的异常体规模较小、埋深较大时,它的异常场容易被其它异常体所掩盖.总体上讲,无论在源下方还是在接收器下方,TEM法对水平方向多个异常体分辨能力优于垂向上的.