Application of direct source parameter imaging (direct local wave number) technique to the 2D gravity anomalies for depth determination of some geological structures

Alvandi A., Deniz Toktay H., Nasri S.

Acta Geophysica, cilt.70, ss.659-667, 2022 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 70
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s11600-022-00750-6
  • Dergi Adı: Acta Geophysica
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.659-667
  • Anahtar Kelimeler: Gravity anomalies, Direct analytic signal, Direct source parameter imaging, ANALYTIC SIGNAL, MAGNETIC DATA, SUSCEPTIBILITY, INDEX
  • İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet

Özet

Analytic signal (AS) is a complex quantity defined by two components, amplitude and phase. The intensity of changes in the phase component of the analytic signal is equal to the local wavenumber, which is used to interpret gravity data from the contact, thin dyke, and horizontal cylinder models. However, one of the disadvantages of this method is its sensitivity to noise. This paper introduces an improved local wavenumber (DSPI) based on a direct analytic signal (DAS) that is more accurate in determining the depth of potential features on gravity anomalies. This method was first tried to determine the depth values of noisy and noiseless 2D synthetic model structures. After theoretical approval, the method was examined on two gravity field data from Iran (the Gol-e-Gohar iron ore mine, Kerman) and Canada (Mobrun orebody, near Noranda). The results obtained from the DSPI method have an excellent agreement with the drilling information, Radial amplitude spectrum, and the Euler deconvolution method.