Total normalized gradient method in the interpretation of airborne electromagnetic and magnetic data

Traynin, Peter; Zhdanov, Michael S.

doi:10.1190/1.1887488

Cited by 2 publications

(2 citation statements)

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“…Outside Russia (USSR), the TNG‐method was used and also partly developed by several authors (Ciancara and Marcak ; Kurkin and Pašteka ; Xiao ; Xiao and Zhang ; Pašteka and Bartková ; Pašteka and Seiberl ; Pašteka ; Yuan and Jin ; Traynin and Zhdanov ; Meng ; Pašteka ; Zeng et al . ; Dondurur ; Zhang et al .…”

Section: Introductionmentioning

confidence: 99%

“…Outside Russia (USSR), the TNG-method was used and also partly developed by several authors (Ciancara and Marcak 1979;Kurkin and Pašteka 1981;Xiao 1981;Xiao and Zhang 1984;Pašteka and Bartková 1990;Pašteka and Seiberl 1992;Pašteka 1994;Yuan and Jin 1994;Traynin and Zhdanov 1995;Meng 1996;Pašteka 1996;Zeng et al 2002;Dondurur 2005;Zhang et al 2005;Aydin 2007;Oruc and Keskinsezer 2008;Aydin 2010;Aydin and Kadirov 2011;Fedi and Florio 2011;Zhang and Meng 2015;Zhou 2016 and others). Similar approaches for source-to-depth estimation based on stable downward continuation have been published in recent years by several authors (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Review Paper: Historical development of the total normalized gradient method in profile gravity field interpretation

Elysseieva¹,

Pašteka²

2018

Geophysical Prospecting

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In the Russian school, the total normalized gradient method belongs to the most wide‐spread of direct interpretation methods for potential field data. This method was also used and partly developed by many experts from abroad. The main advantage of the total normalized gradient method is its relative independence of parameters such as the expected differential density of interpreted structures. The method is built from a construction of a specially transformed field (total normalized gradient) on a section crossing the potential field sources. The special properties of this transformed field allow it to be used to detect the source positions. From the 1960s, the mathematical basis of the method underwent enormous development and several modifications of the method have been elaborated. The total normalized gradient operator itself represents a relatively complicated, non‐linear band‐pass filter in the spectral domain. The properties of this operator can be handled by means of several parameters that act to separate the information about field sources at different depth levels. In this contribution, we describe the development of the method from its very beginning (based mostly on qualitative interpretation of simple total normalized gradient sections) through to more recent numerical improvements to the method. These improvements include the quasi‐singular points method, which refines the filter properties of the total normalized gradient operator and defines an objective criteria (so called criterion ‘α’ and ‘Г') for the definition of source depths in the section. We end by describing possibilities for further development of the method in the future.

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