Table 1

Whole rock compositions of pumice clasts in Bay of Pozzuoli seawater concretes (BAI.06.03P), in Baianus Sinus tuff coarse aggregate (BAI.06.03T), and Bacoli Tuff (BRI.T) in weight percent (wt%) of main element oxides, by ICP-AES

Baianus Sinus (BAI.06)Bacoli Tuff (BRI)XRF data
LLD.03P1.03P2.01P1.05.P2.03.T1.05.T1.06.T1Bacoli TuffPozzolan Pozzolan §
pumice (mortar)pumice (mortar)pumice (mortar)pumice (mortar)tuff (caementa)tuff (caementa)tuff (caementa)Flegrean pyroclastic deposits
Major element compositions (wt%)
SiO20.0140.9050.2846.4150.9949.1851.7752.1752.4553.0857.08
Al2O30.0114.4814.8315.4615.9114.9015.3315.3315.4517.8918.34
Fe2O3(T)0.012.533.062.583.003.473.493.473.424.292.2
MnO0.0010.1040.1410.1160.1320.1070.1100.110n.dn.dn.d
MgO0.010.484.620.514.813.630.850.800.831.230.97
CaO0.0111.492.637.551.891.792.482.412.379.053.15
Na2O0.053.604.314.404.434.333.653.043.333.084.18
K2O0.015.015.346.935.925.817.757.877.857.618.05
TiO20.0010.3050.3820.3380.4050.3910.3810.385n.dn.dn.d
P2O50.010.060.080.050.070.130.130.13n.dn.dn.d
LOI*0.0120.9915.2816.2313.3816.7314.1214.1413.413.053.75
Sum99.95101.00100.60100.90100.50100.1099.8699.1199.2897.72
Trace element contents (ppm)
Y2; 0.52733343425.724.225.9
Zr4; 1375498439512252245259
Nb1; 0.2546466693838.139.4
La0.5; 0.173.779.699.187.160.958.863.3
Yb0.1; 0.013.03.43.43.42.382.302.52
Trace element ratios||
Zr/Y14151315101010
Nb/Y2222122
La/Yb25232926262625
  • Notes: Trace elements from the same samples in parts per million (ppm), by ICP-MS, and calculated trace element ratios. Flegrean pyroclastic deposits whole rock compositions by XRF. Further explananation in text.

  • * Determined gravimetrically.

  • Bacoli quarry, also BRI.05.T1, BRI.06.T used in the Brindisi concrete reproduction (Oleson et al. 2006).

  • Bacoli pozzolan analysis (1) in Costa and Massazza (1974, p. 6), also quoted as analysis (1) in Massazza (2004, p. 475).

  • § Bacoli pozzolan analysis (1) from Sersale and Orsini (1969, p. 114).

  • || See Supplemental Table 2 for complete trace element analyses.