The Research Of Applying Aeromagnetic Gradient Data In Geological Interpretation

Complete conversion of magnetic gradient data processing method mainly includes theoretical research, analysis of gradient data extension of theoretical formula, the model of theoretical research and practical application, the theoretical formula of aeromagnetic gradient data can prove the corresponding pole conversion processing, but through the theoretical model test found the work area to collect the gradient data more than 20 degrees in the geomagnetic inclination can be reduced to the pole, and the geomagnetic inclination for gradient data between 0 ~ 18 degrees after the pole effect is not ideal, namely gradient in this latitude range data of polar effect and can not be well reflected; analysis formulas, theoretical research and model application of gradient data theory, gradient data extension processing highlights the shallow anomaly, the anomaly body relatively deep were suppressed, but this is In the gradient data relative to total outstanding under the condition of shallow anomaly body established, which is in the gradient interpretation separation deep abnormal body and shallow anomaly body provides a valid proof; oblique derivative method in the geological boundary extraction theory model research and application analysis, through model test and real data application show that, by means of the tilt derivative method to judge the geologic body’s boundary has good geological effect, gradient data with other measured the reflection of the tilt derivative method is better than from total conversion and gradient data.Using aeromagnetic and aeromagnetic gradient data, the use of the pole, and tilt derivative method and to carry out the test the gradient zone of Baoding geological prospecting interpretation methods of technology research, of Baoding gradient test area to carry out the abnormal selected, rock delineation, fracture tectonic division and find ore far scenic divided the main work, and formed a set of the gradient data to carry out geological interpretation of ideas, for the future use of the gradient data for geological interpretation laid the foundation.The advantages of the gradient data in the division of the fault structure, the suppression and extraction of anomaly information, and the joint study of the magnetic and magnetic gradient data to reduce the multiple solutions of the geological data are analyzed. At the same time, analyze the gradient data in abnormal extraction advantage and gradient data reflect is the high frequency components, and also is shallow abnormal information generated by the Department of magnetic geologic body, the shallow anomaly information should be located at the depth of normal artificial mining operations, there may be more deep, so for the abnormal information generated by the shallow mineral, gradient data is completely to reflect. In addition, the measurement of aeromagnetic axial gradient has the advantages of aeromagnetic total field measurement There is nothing comparable to this at middle and low latitudes and low latitudes, the aeromagnetic total field data need to be extreme or red to potential field data processing in rock, tectonic interpretation and delineation of metallogenic prediction, also is to calculate the gradient data thus, for more accurate analysis, and middle and lower latitudes of the pole and the red has been recognized as a difficult task, even if the pole or red, the ideal extent of the effect remains to be confirmed further, but if the acquisition of aeromagnetic gradient data of all axis that not only directly obtained gradient data, but also can be converted into the total data of the measured data with gradient anomaly selection using gradient data, greatly reducing the difficulty of the work.