A Constrained 3D Density Model of the Upper Crust from Gravity Data Interpretation for Central Costa Rica

Figure 8

3D density model cross section across the Irazú volcano and surrounding regions. Red and black curves in the upper box show the measured and calculated gravity anomalies, respectively. Black plus-signs indicate topography derived from SRTM 3 arc sec grid which is projected on the cross section; black stars in the lower box show Euler source points. Grayscale polygons represent modeled crustal bodies with corresponding densities. Colored pixels and bars show percentage of change in 𝑉_𝑝 velocities which were calculated by Arroyo [13]. Red triangle indicates the location of the main Quaternary volcanic vent.