Depth Estimation of Microgravity Anomalies Sources by Means of Regularized Downward Continuation and Euler Deconvolution

2011 ◽  
Author(s):  
R. Pasteka ◽  
R. Karcol ◽  
M. Pasiakova ◽  
J. Panisova ◽  
D. Kusnirak ◽  
...  
Keyword(s):  
Depth Estimation ◽  
Downward Continuation ◽  
Euler Deconvolution

The Use of Euler Deconvolution Technique in the Estimation of Depth to Magnetic Source Bodies around the Schist Belt Parts of Kano State, Nigeria

2021 ◽  
Vol 14 (1) ◽  
pp. 19-23
Keyword(s):  
Depth Estimation ◽  
Magnetic Survey ◽  
Schist Belt ◽  
Euler Deconvolution ◽  
Depth Estimate ◽  
Paper Detail ◽  
Magnetic Source ◽  
Deconvolution Technique ◽  
Proton Precession Magnetometer ◽  
Ground Magnetic

Abstract: Depth estimation of magnetic source bodies in parts of the Schist Belt of Kano, using Euler Deconvolution is presented in this paper. Detail ground magnetic survey was carried out using SCINTREX proton precession magnetometer to produce the Total Magnetic Intensity (TMI) map and consequently the residual map. The TMI ranges from 34,261 nT to 34,365 nT, while the residual field ranges from -160 nT to 115 nT. The depth estimate for contacts ranges from 6.5 m to 39.8 m, while that of dyke ranges from 8.9 m to 51.3 m. The depth estimation presented in this work is compared with the results of aeromagnetic study carried out in the same area and found to agree fairly well. Further, this also ensures the validity of aeromagnetic investigation in such applications. Keywords: Contacts, Dykes, Euler Deconvolution, Schist Belt. PACS: 91.25.F and 91.25.Rt.

scholarly journals Depth Estimation of Potential Field Sources by Using Improved Chebyshev‐Padé Downward Continuation in Wave Number Domain

2020 ◽  
Vol 7 (10) ◽  
Author(s):  
Yuan Yuan ◽  
Wenna Zhou ◽  
Xiangyu Zhang ◽  
Guochao Wu ◽  
Shuiliang Tang ◽  
...  
Keyword(s):  
Potential Field ◽  
Depth Estimation ◽  
Downward Continuation ◽  
Wave Number

Weighted Euler deconvolution of gravity data

Geophysics ◽  
1998 ◽  
Vol 63 (5) ◽  
pp. 1595-1603 ◽  
Author(s):  
Pierre B. Keating
Keyword(s):  
Euler Equations ◽  
Gravity Data ◽  
Error Function ◽  
Bouguer Anomaly ◽  
Depth Estimation ◽  
Euler Deconvolution ◽  
Structural Index ◽  
Eastern Canada ◽  
Adequate Sampling

Euler deconvolution is used for rapid interpretation of magnetic and gravity data. It is particularly good at delineating contacts and rapid depth estimation. The quality of the depth estimation depends mostly on the choice of the proper structural index and adequate sampling of the data. The structural index is a function of the geometry of the causative bodies. For gravity surveys, station distribution is in general irregular, and the gravity field is aliased. This results in erroneous depth estimates. By weighting the Euler equations by an error function proportional to station accuracies and the interstation distance, it is possible to reject solutions resulting from aliasing of the field and less accurate measurements. The technique is demonstrated on Bouguer anomaly data from the Charlevoix region in eastern Canada.

scholarly journals Tensor deconvolution: A method to locate equivalent sources from full tensor gravity data

Geophysics ◽  
2007 ◽  
Vol 72 (5) ◽  
pp. I61-I69 ◽  
Author(s):  
Valentin Mikhailov ◽  
Gwendoline Pajot ◽  
Michel Diament ◽  
Antony Price
Keyword(s):  
Gravity Field ◽  
Gravity Data ◽  
Random Noise ◽  
Depth Estimation ◽  
Observation Point ◽  
Euler Deconvolution ◽  
Structural Index ◽  
Measuring Device ◽  
Equivalent Sources ◽  
Scalar Invariants

We present a method dedicated to the interpretation of full tensor (gravity) gradiometry (FTG) data called tensor deconvolution. It is especially designed to benefit from the simultaneous use of all the FTG components and of the gravity field. In particular, it uses tensor scalar invariants as a basis for source location. The invariant expressions involve all of the independent components of the tensor. This method is a tensor analog of Euler deconvolution, but has the following advantages compared to the conventional Euler deconvolution method: (1) It provides a solution at every observation point, without the use of a sliding window. (2) It determines the structural index automatically; as a consequence, the structural index follows the variations of the field morphology. (3) It uses all components of the measured full gradient tensor and gravity field, thus reducing errors caused by random noise. It is based on scalar invariants that are by nature insensitive to the orientation of the measuring device. We tested our method on both noise-free and noise-contaminated data. These tests show that tensor solutions cluster in the vicinity of the center of causative bodies, whereas Euler solutions better outline their edges. Hence, these methods should be combined for improved contouring and depth estimation. In addition, we use a clustering method to improve the selection of solutions, which proves advantageous when data are noisy or when signals from close causative bodies interfere.

scholarly journals Depth Estimation of 2-D Magnetic Anomalous Sources by Using Euler Deconvolution Method

2004 ◽  
Vol 1 (3) ◽  
pp. 209-214 ◽  
Author(s):  
M.G. El Dawi ◽  
Liu Tianyou ◽  
Shi Hui ◽  
Luo Dapeng
Keyword(s):  
Depth Estimation ◽  
Deconvolution Method ◽  
Euler Deconvolution

scholarly journals Estimation of Depth to Bouguer Anomaly Sources Using Euler Deconvolution Techniques

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gideon Oluyinka Layade ◽  
Hazeez Edunjobi ◽  
Victor Makinde ◽  
Babatunde Bada
Keyword(s):  
Bouguer Anomaly ◽  
Depth Estimation ◽  
Hydrocarbon Exploration ◽  
Survey Method ◽  
Depth Range ◽  
Euler Deconvolution ◽  
Structural Index ◽  
Geological Information ◽  
Geophysical Measurement ◽  
Deconvolution Techniques

Abstract The geophysical measurement of variations in gravitational field of the Earth for a particular location is carried out through a gravity survey method. These variations termed anomalies can help investigate the subsurface of interest. An investigation was carried out using the airborne satellite-based (EGM08) gravity dataset to reveal the geological information inherent in a location. Qualitative analysis of the gravity dataset by filtering techniques of two-dimensional fast Fourier transform (FFT2D) shows that the area is made up of basement and sedimentary Formations. Further enhancements on the residual anomaly after separation show the sedimentary intrusion into the study area and zones of possible rock minerals of high and low density contrasts. Quantitative interpretations of the study area by 3-D Euler deconvolution depth estimation technique described the depth and locations of gravity bodies that yielded the gravity field. The result of the depth to basement approach was found to be in the depth range of 930 m to 2,686 m (for Structural Index, SI = 0). The research location is a probable area for economic mineral deposits and hydrocarbon exploration.

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