Skip to main content
Fig. 7 | Swiss Journal of Geosciences

Fig. 7

From: SAPHYR: Swiss Atlas of Physical Properties of Rocks: the continental crust in a database

Fig. 7

Measured density values distribution for granites. The data distribution of grain density has been a valid instrument to determine and validate the criteria we adopted in grouping. The displayed distributions clearly justify merging the surface data with data at depth (borehole) for this lithology group. Numbers in parenthesis represent the total number of data. The figure provides a visual comparison of a histogram and a kernel distribution generated from the density data for granites from boreholes, outcrops and all together. Histograms refer to the number of data (on the right vertical axis) falling in a specific densities range, here in steps of 50 g/cm3. For example, in the case of granites from boreholes, out of 113 density data available, 47 fall in the range from 2650 to 2700 g/cm3. Solid curves represent the kernel smoothing function calculated over the density data population and representing the relative occurrence of density values in % (left axis). In granites from boreholes the value of density with max probability (here 60%) is 2641 kg/m3

Back to article page