The method of geological body boundary identification based on fault model scanning and its application
ZHAO Yang-Yang1,2, CHEN Chao3, SHI Hao4
1. Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China;
2. Institute of Geological Survey, Chang'an University, Xi'an 710054, China;
3. Hubei Subsurface Multi-scale Imaging Key Laboratory, China University of Geosciences, Wuhan 430074, China;
4. Xi'an Research Institute of China Coal Technology & Engineering Group, Xi'an 710077, China
Determining the locations and the dipping angles of the faults is one of the most important issues in the interpretation of the gravity profile data.The authors first construct a series of 2D fault models with different geometric parameters (e.g., locations and dipping angles).Then the theoretical gravity responses of the models are applied to the correlation scanning with the observing gravity profile data in the moving windows.According to the comparison between the calculated correlation values and the threshold value,we can judge whether the faults exist or not beneath the centers of the windows.If the faults exist,the corresponding geometric parameters of the maximum correlation value are treated as the interpretation results.The synthetic model tests suggest that it is effective to identify the faults with different dipping angles.Moreover,the correlation scanning method is applied to an actual profile of the gravity data in field,and the results show that the determined locations and dipping angles of the faults by the proposed method are consistent well with those of the known faults detected by surface geological survey and other geophysical probes.Therefore,both the synthetic tests and the field example indicate the validity of the method presented in this paper.
赵洋洋, 陈超, 石浩. 基于断层模型扫描的地质体边界识别方法与应用[J]. 物探与化探, 2016, 40(5): 1035-1039.
ZHAO Yang-Yang, CHEN Chao, SHI Hao. The method of geological body boundary identification based on fault model scanning and its application. Geophysical and Geochemical Exploration, 2016, 40(5): 1035-1039.
[1] 王万银, 邱之云, 杨永, 等.位场边缘识别方法研究进展[J].地球物理学进展,2010,25(1):196-210.
[2] Cooper G R J,Cowan D R.Enhancing potential field data using filters based on the local phase [J].Computer ＆Geosciences,2006,32:1585-1591.
[3] Cooper G R J,Cowan D R.Enhancing linear features in image data using horizontal orthogonal gradient ratios [J].Computers ＆ Geosciences,2007,33:981-984.
[4] Cooper G R J,Cowan D R.Edge enhancement of potential-field data using normalized statistics [J].Geophysics,2008,73(3):H1-H4.
[5] 余钦范,楼海.水平梯度法提取重磁源边界位置[J].物探化探计算技术,1994,16(4):363-367.
[6] 曾华霖.重力场与重力勘探[M]. 北京:地质出版社,2006.
[7] Stanley M,Green R.Gravity gradients and interpretation of the truncated plate [J].Geophysics,1976,41(6):1370-1376.
[8] 魏伟,刘天佑.梯度法解释复杂二维断裂重力异常[J].物探与化探,2005,29(4):347-350.
[9] 王同庆,陈超,董运洪,等.改进的重力异常梯度法在二维断层几何参数定量解释中的应用[J].大地测量与地球动力学,2013,33(6):81-85.
[10] 王宜昌.褶积在重力资料解释中的应用[J].石油地球物理勘探,1983,18(5):457-463.
[11] 王慎中.滤波因子Vzz在重力资料褶积处理中的应用[J]. 江汉石油学院学报,1991,13(3):30-36.
[12] 王正科,田舍,李久亮,等.滑动相关分析在重磁资料解释中的应用[J].物探与化探,2005,29(5):409-413.
[13] 谈小生.相关系数及其在矿产资源预测中的应用[J].长春地质学院学报,1994,21(4):469-474.
[14] 马国庆,杜晓娟,李丽丽.利用水平与垂直导数的相关系数进行位场数据的边界识别[J].吉林大学学报:地球科学版,2011,41(1):345-348.
[15] 刘燕戌,李文勇,徐建春.航空重、磁异常相关性分析方法及其应用[J].物探与化探,2012,36(5):783-787.
