The Milos Island bouguer anolmaly revisited by means of a complex attribute analysis and inferred source parameter estimates

Abstract

A complex attribute analysis is used to extract parameters of the buried structures that give rise to the anomalous gravity field in the island of Milos (Greece, the Central Aegean Sea). The attributes themselves assist in the interpretation because they can delineate the edges of the concealed targets. However, source parameters like the local depth, strike and dip are obtained from the complex attributes on the basis of an analytical expression for the effect of a simple subsurface model. The simplest one, i. e. the sloping contact model, is used in this study. A complex attribute analysis is also applied to the pseudomagnetic transformation of the data. The result cannot be considered satisfactory though it cannot be'consideredfalse either. This is attributed to the extra noise induced to the pseudomagnetic data by the transform process. The estimated local parameters are in agreement with the results obtained by previous interpretations. They can be used either independently or in combination with other methods for interpreting the anomalous field.