A 3-D gravity inversion tool based on exploration of model possibilities

Shallow structure beneath the Central Volcanic Complex of Tenerife from new gravity data: Implications for its evolution and recent reactivation

“…400 kg/m 3 (i.e., 50% of the prescribed contrast), which represents the value consistent with the minimum total anomalous mass necessary to match the observed Bouguer anomaly (see previous section on inversion theory). In general, while the shape and distribution of the modelled anomalous bodies are indicative of their real features as shown by the above sensitivity analysis and also by the examples given by Camacho et al (2002), due to the tendency of the methodology to produce models involving a minimum total anomalous mass, the density contrasts are likely to be stronger in reality. It is therefore impossible to attribute a finite "real" value to any density contrast.…”

“…a model involving anomalous bodies with simple and smoothed geometries and a minimum total mass is uniquely determined. Accordingly, in order to get unique results from our data inversion, we adopt a mixed minimisation condition, based on model "fitness" (least square fitness) and "smoothness" (total anomalous mass) (see also Camacho et al, 2002): benchmarks employed for the inversion as described in the next section, we calculate the resultant gravity value at each benchmark and then use these data for inversion.…”

Modelling of the Neves Corvo Area

“…A 3D density model was calculated by applying an inversion methodology (Camacho et al 2002) to the gravity data. The gravity dataset allowed a resolution grid of 100 m, given that this was the average distance between data points.…”

Structure of Alluvial Valleys from 3-D Gravity Inversion: The Low Andarax Valley (Almería, Spain) Test Case

“…The process stops when f approaches 1, resulting in the modelled 3-D structure for anomalous density and a final linear regional trend. Camacho et al (2000 and2002) and Gottsmann et al (2008) give some simulation examples showing the suitability of this 3D inversion approach while also pointing out some limitations.…”