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Swiss Journal of Geosciences
Fig. 9 | Swiss Journal of Geosciences

Fig. 9

From: A gravimetric assessment of the Gotthard Base Tunnel geological model: insights from a novel gravity terrain-adaptation correction and rock physics data

Fig. 9

Gravity effect due to a density variation of \(\sim\) 300 kg \(\cdot\) m−3 of a middle-size unit (Piora Dolomite), presenting a \(\sim\) 600 m × 400 m topographic adaptation. a Gravity misfits, defined as the difference between synthetic values and corrected observations, for a higher density value of 2885 kg \(\cdot\) m−3 (green line and dots) and for a lower density value of 2540 kg \(\cdot\) m−3 for the Dolomite unit (yellow unit in panel b). The remaining unit densities are unvaried. b Geological profile as projected along the straight reference model line. The green line is the reference topography, and separates the modelled geological units below and the original model that includes the parts above. The latter excess is removed and accounted for by the TAC correction in the transition from the 3D to the 2.5D model

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