TN1011 : Comparison of Euler deconvolution method and power spectrum method in estimating the depth of gravimetric anomalies of chromite in Dolatabad area, Hormozgan
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2020
Authors:
Maryam Bagheyan [Author], Ali Nejati Kalateh[Supervisor], Susan Ebrahimi[Supervisor]
Abstarct: Geophysical methods are tools that use quantitative measurements Physical objects on or above the ground provide valuable information. Since the chromite mineral has a significant density difference with the host rocks, gravimetric method can be used to explore these deposits. One of the main goals in interpreting gravimetric data is to determine the depth and range of abnormal masses; For this reason, many methods have been proposed to estimate the depth of potential field anomalies. In this research, two methods, including Euler and power spectrum, are interpreted and the depth of gravimetric data is estimated. The standard Euler fusion method is useful for interpreting large volumes of data that do not require basic information about magnetic vectors and the density of anomalous generating springs and can be done in two or three dimensional modes. Another method is to estimate the depth of anomaly by the power spectrum method, which interprets gravitational and magnetic data in the frequency domain. If the logarithm of the power spectrum obtained from the Fourier transform of potential field data is represented by wavelength values, it also responds to many factors such as the surface propagation of the anomaly source, the depth of the anomaly source, its thickness, density, and magnetization. Give. To evaluate and compare the efficiency of each method, the methods were first applied to artificial data and then to real data in Dolatabad region of Hormozgan. Estimation of depth and interpretation of chromite data in the region using surface trend filter, derivative and analytical signal and horizontal gradient and comparison of Euler method and power spectrum in estimating the depth of anomalous origin. The results of these methods are consistent with the geological information in the Euler-mixed method and the power spectrum method; The results of Euler's equation for deeper anomalies and the power spectrum method for more superficial anomalies had good results.
Keywords:
#Depth estimation #Gravimetry #Power spectrum method #Dolatabad region of Hormozgan. Keeping place: Central Library of Shahrood University
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