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Table 2 Whole-rock geochemistry of the studied volcanic rock samples from the Irabu knolls of the Okinawa Trough; 6K#562R1, 6K#569R4-1, 6K#569R4-2, and 6K#569R4-3

From: Seafloor hydrothermal alteration affecting magnetic properties of abyssal basaltic rocks: insights from back-arc lavas of the Okinawa Trough

Sample name SiO2 TiO2 Al2O3 Fe2O3* MnO MgO CaO Na2O K2O P2O5 Total H2O– (%) LOI** (%)
6K#562R1 52.1 0.65 18.3 10.0 0.16 4.2 11.2 2.15 0.33 0.09 99.2 0.51 0.35
6K#569R4-1 53.9 0.78 17.7 10.7 0.28 5.0 7.1 2.18 0.12 0.11 97.9 4.24 3.65
6K#569R4-2 54.9 0.74 17.9 9.9 0.17 3.4 9.4 2.61 0.64 0.11 99.7 0.57 − 0.07
6K#569R4-3 54.8 0.79 17.9 10.1 0.18 3.4 7.9 2.86 0.54 0.11 98.6 1.96 2.69
  1. *Total Fe measured as Fe2O3
  2. **Loss on ignition