Skip to main content

Table 2 Trace-element chemical composition expressed as ppm of representative samples of Euganean trachyte from the Renaissance city walls of Padua determined by LA-ICPMS, on both surface (i.e., weathering crust or patina) and host rock (inner part). Only a selection of the analyzed elements is showed (the complete dataset is included in Additional file 1)

From: Trachyte weathering in the urban built environment related to air quality

Sample V Cr Co Ni Cu Zn As Cd Sn Sb Σ REE Pb Bi
Calcite-rich alteration
SCR-01
 Surface 23.00 6.50 2.95 15.80 261.00 3660.00 25.80 10.50 13.70 6.29 48.95 176.60 0.92
 Host rock 3.49 2.32 0.68 1.58 12.09 57.50 2.40 0.17 1.58 0.25 123.34 8.24 0.05
GAR-03
 Surface 87.20 115.00 14.70 75.20 865.00 1042.00 53.90 11.70 67.60 25.80 210.83 587.00 4.93
 Host rock 3.29 1.14 1.00 1.51 15.40 116.70 1.05 0.68 1.41 0.11 61.86 15.50 0.05
CSN-03
 Surface 42.30 84.00 9.70 58.90 481.00 523.00 56.00 3.80 22.90 6.40 138.93 389.00 1.14
 Host rock 4.08 0.64 1.79 0.96 8.32 93.30 1.12 0.24 1.67 0.22 61.29 29.30 0.05
SCR-05
 Surface 420.00 70.00 7.25 35.50 352.00 11460.00 55.40 8.85 50.50 32.60 199.78 25800.00 2.57
 Host rock 5.46 10.06 2.78 1.74 22.60 1582.00 1.98 0.50 3.74 0.27 236.71 8.39 0.05
Iron-rich alteration
SCR-07
 Surface 505.00 211.00 16.50 72.70 1009.00 6210.00 385.00 63.10 94.60 34.20 386.86 24900.00 45.50
 Host rock 2.99 0.79 1.60 1.50 30.00 65.80 1.04 0.15 0.92 0.17 130.32 8.21 0.03
Weak alteration
FST-07
 Surface 42.50 5.00 6.80 48.00 384.00 871.00 10.60 5.52 24.40 6.45 176.81 280.00 2.33
 Host rock 1.88 0.78 1.06 6.50 18.50 73.40 0.64 0.24 1.51 0.13 65.27 5.46 0.02
Gypsum-rich alteration
FST-05
 Surface 10.27 3.90 1.28 4.75 23.80 24.60 11.00 0.08 1.45 1.97 9.88 22.13 0.10
 Host rock 10.10 1.26 1.73 2.42 16.10 41.50 2.04 0.19 2.28 0.30 149.32 10.52 0.06
Average composition of Euganean trachytea 23 3 3 2 23 103 n/a n/a n/a n/a n/a 15 n/a
  1. The samples are divided by different types of alteration and sampling location as in Fig. 2 (SCR, Bastione Santa Croce; GAR, Torrione dell’Arena; CSN, Bastione Castelnuovo; FST, Torrione Venier)
  2. a Bulk-rock chemical composition determined by X-ray fluorescence and averaged among 86 fresh trachyte samples collected on the Euganean Hills in 40 different quarries and outcrops [32]