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Table 1 Composition of starting materials

From: Contrasting partition behavior of F and Cl during hydrous mantle melting: implications for Cl/F signature in arc magmas

  Basalt Peridotite Hydrous basalt a
SiO2 47.70(47) 45.97(47) 46.10(45)
TiO2 0.62(2) 0.18(1) 0.43(1)
Al2O3 19.05(21) 14.76(16) approximately 14.8a
Cr2O3 0.12(0.3) 0.47(1) 0.10(0.2)
FeO* 7.82(8) 7.54(7) 7.38(7)
MnO 0.15(0.3) 0.13(0.3) 0.14(0.3)
MgO 10.49(3) 37.79(11) 7.32(2)b
CaO 11.75(35) 3.21(10) 13.09(39)
Na2O 2.35(5) 0.33(1) 2.27(7)
K2O 0.08(0.2) 0.03(0.1) 0.60(2)
P2O5 0.01(0.02) 0.03(0.1) ND
H2O N.D. N.D. approximately 7.8a
Total 100.13 99.99 100.00
  1. Analyses were done by ICP-AES on basalt and peridotite powders. Units in parentheses represent one standard deviation, determined from the ICP-AES standard BHVO-1.
  2. aHydrous basalt composition was analyzed before the addition of Al(OH)3.. Al(OH)3 was then added to complete Al2O3 contents, so Al2O3 and H2O are calculated compositions likely associated with a larger error (since reported contents are calculated from weighted Al(OH)3).
  3. bMgO of basalt is low to allow the addition of MgF2 and MgCl2.
  4. FeO* total Fe as FeO.
  5. N.D. not determined.