【摘要】 重磁观测数据的边界识别是数据处理及解释的重要组成部分,断裂构造的位置、走向及分布范围的准确识别主要依赖于所使用的边界探测技术。笔者详细讨论了斜导数法、斜导数的水平导数法(THDR)、总梯度法及总梯度的规则化方法(TDX)在重磁数据边界识别中的数值特征,并将这4种方法分别应用于埋深不同的重力直立立方体模型及重力倾斜岩脉模型的边界识别中。结果表明:斜导数法可准确识别不同埋深的地质体边界,对于倾斜地质体边界识别效果不理想;THDR方法可准确识别不同埋深、垂直及倾斜的地质体边界;总梯度法只对埋深较浅的地质体有较好地识别效果;TDX方法可准确识别出不同埋深地质体的边界。将4种方法联合应用于虎林盆地实测重力数据,后经综合解释,在虎林盆地识别出30条断裂构造,其中6条深大断裂带与前人研究结果相符。更多还原

【Abstract】 The boundary detection methods are important role of the processing and interpretation of the gravity and magnetic data.The accurate identification of the position,the orientation and the distribution range of the faults mainly depends on the boundary detection technique.The number characteristics of tilt angle,total horizontal derivative of the tilt angle,total derivative of the observed data and the normalized of total horizontal derivative of data are discussed detailed when they are applied in the potential observed data.And these methods are used in the theory models with different top depth and tilt angle.The dip angle method is effective when it is used in the models with different top depth,but fault when the models have nonzero dip angle,while the THDR method is effective to all the models above.The total derivative has better results in the models with sharper top depth than the deeper one,while the TDX method has very good results with both models.The combination of the four methods applied in the measured gravity data of Hulin Basin,and 30 faults were ascertained after the interpretation.6 Major faults zone detected by us consisted with the results of previous studies.更多还原