2D cross-gradient joint inversion of magnetic and gravity data across the Capricorn Orogen in Western Australia.

Abstract

In order to contribute to the recent efforts to produce a combined interpretation of the Capricorn Orogen in Western Australia, we performed the 2D cross-gradient joint inversion of the gravity and magnetic data available along the trace of the seismic section 10GA-CP2. This methodology establishes that even in the absence of analytical relationships between the physical properties underlying disparate geophysical methods, we expect a degree of structural similarity in the images that they provide. Our results show that the major subsurface structures interpreted on the seismic section are readily detected by the 2D cross-gradient joint inversion. We also illustrate how this structural framework acquires further geological significance when the framed density and magnetization properties are interpreted together and correlated to the expected geological materials within the Capricorn orogen.