AUTOMATIC INTERPRETATION OF GRAVITY GRADIOMETRIC DATA IN TWO DIMENSIONS: VERTICAL GRADIENT¹

Abstract

The magnetic and gravity field produced by a given homogeneous source are related through Poisson's equation. Starting from this consideration, it is shown that some 2D interpretation tools, widely applied in the analysis of aeromagnetic data, can also be used for the interpretation of gravity gradiometric data (vertical gradient). This paper deals specifically with the Werner deconvolution, analytic signal and Euler's equation methods. After a short outline of the mathematical development, synthesized examples have been used to discuss the efficiency and limits of these interpretation methods. These tools could be applied directly to airborne gravity gradiometric data as well as ground gravity surveys after transformation of the Bouguer anomalies into vertical gradient anomalies. An example is given of the application of the Werner deconvolution and Euler's equation methods to a microgravity survey.

Sismik Yansıma ve Gravite Verilerinden Saros Körfezinin Temel Yapısının İncelenmesi

“…[17] ise, yöntemi geliştirerek gridlenmiş manyetik verilere uygulamışlardır. Euler dekonvolüsyonunun gravite verilerine uygulanmasını ise [18], [19], [20], [21], [22], ve [23] …”

Integrated gradient interpretation techniques for 2D and 3D gravity data interpretation

“…Their counterparts, in the case of gravity data, have been introduced by Klingele et al (1991). Marson and Klingele (1993) define the analytic signal of the vertical gravity gradient produced by a 3D source as follows: where |A g (x, y)| is the amplitude of the analytic signal at (x, y), g is the observed gravity field at (x, y), and (…”

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

“…Reid et al (1990), following a suggestion in Thompson's paper, developed an equivalent method to operate on gridded magnetic data. The application of Euler deconvolution to gravity data has been carried out by several authors, including Wilsher (1987), Corner and Wilsher (1989), Klingele et al (1991), Klingele (1993), Fairhead et al (1994), and Huang et al (1995). The 3D equation for Euler deconvolution given by Reid et al (1990) is…”