The Spectral Determination of Depths to Buried Magnetic Basement Rocks

Treitel, Sven; Clement, William G.; Kaul, R. K.

doi:10.1111/j.1365-246x.1971.tb02187.x

Cited by 66 publications

(32 citation statements)

References 12 publications

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“…This method provides a relationship between the spectrum of the anomalies and the depth of sources in the frequency domain. TREITEL et al (1971) have used this method to map geologic structures from gravity data observed at the surface. DIMITRIADIS et al (1987) have generalized this approach to gravity data.…”

Section: Methodsmentioning

confidence: 99%

Determination of Tectonic and Crustal Structure of the Eastern Pontide Orogenic Belt (NE Turkey) Using Gravity and Magnetic Data

Maden

Gelişli

Eyüboğlu

et al. 2009

Pure Appl. Geophys.

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The Eastern Pontide Orogenic Belt is one of the most complex geodynamic settings within the Alpine belt. Subduction polarity, which is responsible for the formation of the Eastern Pontide Magmatic Arc, is still under debate because of limited geological, geophysical and geochemical data. This orogenic belt is mainly divided into three subzones depending on lithological characteristics and facies changes as in Northern, Southern and Axial Zones from North to South. These zones are separated from each other by near-vertical faults that display the block-faulting tectonic style of this belt. In this study, the tectonic and crustal structure of the Eastern Pontides, which as yet have not been prospected by using geophysical data, has been investigated with potential field data. The horizontal gradient map obtained from gravity data shows a number of steep and gentle lineaments. It seems that these lineaments E-W, NE and NW-trending correspond to major structural zones of continental crust. Additionally, The Moho depth and Curie point depth variation maps of the Eastern Pontide Orogenic Belt have been computed with the power spectral method of the radial wavenumber carried out by using the fast Fourier transform method. As a result of this method, we estimated that the depths of the Moho and Curie point varied between 29.0 ± 1.2-47.2 ± 1.9 km and 14.3 ± 0.7-27.9 ± 1.4 km, respectively. Our findings indicate that the Moho depth generally increases from north to south in the region. However, the Curie point depth level within the crust has an undulating surface, not a horizontal one.

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Section: Methodsmentioning

confidence: 99%

Determination of Tectonic and Crustal Structure of the Eastern Pontide Orogenic Belt (NE Turkey) Using Gravity and Magnetic Data

Maden

Gelişli

Eyüboğlu

et al. 2009

Pure Appl. Geophys.

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“…The Spector and Grant method uses the gridded data for computing the 2-D power spectrum, then annular averages to find the depths of anomalous sources due to the uncorrelated distribution of the ensemble of prismatic bodies. The spectral analysis method found various applications in the interpretation of gravity and magnetic data (SPECTOR and GRANT, 1970;TREITEL et al, 1971, NEGI et al, 1986. The depth value can be calculated from the slope of the straight line fitted to the plot of the log power spectrum versus the wavenumber.…”

Section: Scaling Spectral Methodsmentioning

confidence: 99%

Depth Estimation from Gravity Data Using the Maximum Entropy Method (MEM) and the Multi Taper Method (MTM)

Bansal

Dimri

Sagar

2006

Pure appl. geophys.

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The depth determination from the gravity data in frequency domain is carried out using the classical fast Fourier transform (FFT) method utilizing scaling properties of ensemble of anomalous source. The problem of calculating power spectrum from the FFT is well described in the literature. Here, the application of other high-resolution methods of power spectrum calculation, such as maximum entropy method (MEM) and multi-taper method (MTM) are explored to estimate depth to anomalous sources. At the outset, the FFT, the MEM and the MTM are tested on synthetic gravity data, generated for different types of synthetic models and then all these methods are applied to the field gravity data of the Bengal basin. The MTM with scaling is found to be superior for providing the detailed subsurface information rather than the MEM and the FFT methods in the case of synthetic as well as field examples.

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“…It has become a widely used tool for interpretation of potential field data, especially for depth estimation. This approach has been developed by many workers (e.g., [20][21][22]). However, it was proved that the International Journal of Geophysics FFT introduces unacceptable distortions at high frequencies, which describe the response of shallow sources.…”

Section: Spectral Analysis Of the Ground Magnetic Survey Datamentioning

confidence: 99%

Analysis and Interpretation of the Field and Laboratory Geophysical Measurements of Black-Sand Beach Deposits, East Rosetta, Egypt

Elsadek¹,

Ammar²,

Elkhateeb³

2012

International Journal of Geophysics

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The present study deals with the analysis and interpretation of the results of field geophysical survey and laboratory geophysical measurements. The study of the magnetic and electrical methods was selected because the beach sands contain many minerals that have magnetic and electric properties. Analysis and interpretation of the field and laboratory magnetic and geoelectric maps demonstrated that the investigated beach-alluvial deposits can be subdivided according to their magnetic and geoelectric properties into three main zones striking nearly parallel to the shoreline of the Mediterranean Sea at the study area. The northern zone is more enriched in black sands than the central or southern zones. Field and laboratory magnetic susceptibility measurements provided very useful maps for the concentration of heavy minerals. The deep-seated magnetic response was calculated at an average depth of 239.6 m, while the near-surface magnetic responses were computed at average depths of 9.1, 57.9, and 81.8 m, respectively. The correlation between the geophysical features, recorded on the total magnetic field intensity, the electric resistivity, the IP chargeability, and the calculated metal factor, was found to agree to a great extent. The heavymineral concentration was found to decrease with depth. However, the heavyminerals show parallel zones below the surface, suggesting similar sedimentation environments.

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The Spectral Determination of Depths to Buried Magnetic Basement Rocks

Cited by 66 publications

References 12 publications

Determination of Tectonic and Crustal Structure of the Eastern Pontide Orogenic Belt (NE Turkey) Using Gravity and Magnetic Data

Determination of Tectonic and Crustal Structure of the Eastern Pontide Orogenic Belt (NE Turkey) Using Gravity and Magnetic Data

Depth Estimation from Gravity Data Using the Maximum Entropy Method (MEM) and the Multi Taper Method (MTM)

Analysis and Interpretation of the Field and Laboratory Geophysical Measurements of Black-Sand Beach Deposits, East Rosetta, Egypt

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