New discrimination techniques for Euler deconvolution

FitzGerald, Desmond

doi:10.1016/s0098-3004(04)00057-3

Cited by 29 publications

(39 citation statements)

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“…SI must be chosen according to a prior knowledge of the source geometry. For example, in gravity case, SI＝2 for a sphere, SI＝1 for a horizontal cylinder, SI＝0 for a fault, and SI＝-1 for a contact (FitzGerald et al, 2004). The two horizontal gradients (& / &x, & /&y ) and vertical (& /&z ) derivatives (Fig.…”

Section: Euler Deconvolutionmentioning

confidence: 99%

Euler deconvolution of gravity data in Geothermal Reconnaissance; the Obama geothermal area, Japan

Saibi¹,

Nishijima²,

Aboud³

et al. 2006

BUTSURI-TANSA(Geophysical Exploration)

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Obama geothermal area is located on the western side of Kyushu Island, southwestern Japan. This area is characterized by high potential geothermal resources that attract most of researchers to study the subsurface structure of the area. Euler deconvolution is applied to newly acquired gravity data to image the subsurface structures thereby aiding the geothermal exploration. The results were compared with the available geologic and geothermal information in order to get a relationship between structures and geothermal resources. These analyses indicate that the dominant subsurface faults trend E W, but N S trending faults also exist. The dominant orientation of these faults provides a geothermal relation between subsurface structures and geothermal resources in the Obama geothermalˆeld.

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Section: Euler Deconvolutionmentioning

confidence: 99%

Euler deconvolution of gravity data in Geothermal Reconnaissance; the Obama geothermal area, Japan

Saibi¹,

Nishijima²,

Aboud³

et al. 2006

BUTSURI-TANSA(Geophysical Exploration)

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“…Conventional wisdom is to make the convolution window width not less than half the maximum expected depth to the source (FITZGERALD et al, 2004 …”

Section: Methodsmentioning

confidence: 99%

Automatic Interpretation of Magnetic Data Using Euler Deconvolution with Nonlinear Background

Dewangan

Ramprasad

Ramana

et al. 2007

Pure appl. geophys.

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The voluminous gravity and magnetic datasets demand automatic interpretation techniques like Naudy, Euler and Werner deconvolution. Of these techniques, the Euler deconvolution has become a popular choice because the method assumes no particular geological model. However, the conventional approach to solving Euler equation requires tentative values of the structural index preventing it from being fully automatic and assumes a constant background that can be easily violated if the singular points are close to each other. We propose a possible solution to these problems by simultaneously estimating the source location, depth and structural index assuming nonlinear background. The Euler equation is solved in a nonlinear fashion using optimization technique like conjugate gradient. This technique is applied to a published synthetic dataset where the magnetic anomalies were modeled for a complex assemblage of simple magnetic bodies. The results for close by singular points are superior to those obtained by assuming linear background. We also applied the technique to a magnetic dataset collected along the western continental margin of India. The results are in agreement with the regional magnetic interpretation and the bathymetric expressions.

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“…SI must be chosen according to prior knowledge of the source geometry. For example, SI = 2 for a sphere, SI = 1 for a horizontal cylinder, SI = 0 for a fault, and SI = −1 for a contact (FitzGerald et al, 2004). The two horizontal gradients (∂g/∂ x, ∂g/∂ y) and the vertical gradient (∂g/∂z) are used to compute the anomalous source locations.…”

Section: Euler Deconvolution Of Gravity Datamentioning

confidence: 99%

Relation between structure and low-temperature geothermal systems in Fukuoka city, southwestern Japan

et al. 2008

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The Fukuoka area is located in the southwestern part of Japan. The Yokote-Ijiri area, located in the southern part of Fukuoka city, has several low-temperature geothermal systems, including eleven hot springs. From 1996 to 2008, the Fukuoka area was investigated by gravity survey, using Scintrex CG-3 and CG-3M gravimeters, in an attempt to delineate its subsurface structure. The surveys were intended to improve the understanding of the relation between the geothermal systems and the subsurface structure as well as to locate the active faults in the surveyed area, which are responsible for generating large earthquakes. The gravity data were analyzed using integrated gradient interpretation techniques, such as the Horizontal Gradient (HG), Tilt Derivative (TDR), and Euler deconvolution methods. With these techniques, many faults were detected, including the famous Kego fault, which is an active fault in Fukuoka city. A 2-D gravity model was constructed to show the relationship between the faults and the geothermal systems. The results of the present study will hopefully lead to an understanding of the relationships between the interpreted faults and the location of the low-temperature geothermal systems and possibly aid in future geothermal exploration of the area.

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New discrimination techniques for Euler deconvolution

Cited by 29 publications

References 0 publications

Euler deconvolution of gravity data in Geothermal Reconnaissance; the Obama geothermal area, Japan

Euler deconvolution of gravity data in Geothermal Reconnaissance; the Obama geothermal area, Japan

Automatic Interpretation of Magnetic Data Using Euler Deconvolution with Nonlinear Background

Relation between structure and low-temperature geothermal systems in Fukuoka city, southwestern Japan

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