Table T2. Comparison of basalt compositions from Site 321 (DSDP Leg 34) and Hole 1226B (ODP Leg 201).
Sample:
Site 321 average
201-1231B-14X-1,
0-2 cm
Standard BIR1
SRM reported value
Major element oxide (wt%):


SiO2 50.32 48.73 47.93 47.96
TiO2 2.37 2.64 0.98 0.96
Al2O3 12.86 14.1 15.43 15.5
Fe2O3* 14.54 15.72 11.25 11.3
MnO 0.18 0.21 0.16 0.18
MgO 5.91 5.11 9.24 9.7
CaO 10.4 9.96 13.05 13.3
Na2O 2.5 2.49 1.71 1.82
K2O 0.17 0.53 0.02 0.03
P2O5
0.27 0.02 0.02
LOI
3 2
Total 99.25 99.76 99.79 100.77
Trace element (ppm):


Ba
18 7 7
Ni
41 147 170
Sc
43 40 44
Cr
89 356 370
Cu
70 116 125
Dy
9.85 2.61 4
Ce
18.1 3.7 1.9
Co
37.9 56.1 52
Eu
2.04 0.49 0.55
Gd
8.42 1.98 1.8
Hf
4.7 <0.5 0.6
Nd
17.8 2.7 2.5
La
7.3 0.8 0.63
Li



Sr
103.3 108.7 110
V
472 337 310
Y
60.3 17.1 16
Zn
119 51 70
Zr
151.5 13.7 18
SRM informational values (ppm):

As
1.5 0.6 0.44
B



Be



Cl



F



Ga
20.8 16.1 16
Lu
0.92 0.27 0.26
Nb
4.5 <0.5 0.6
Pb
0.8 4.5 3
Sb
0.1 0.5 0.58
Sm
6.7 1.2 1.1
Additional elements (ppm):


C
0.04

S
<0.01

Mo
0.3 <0.1
Cd
<0.1 <0.1
Bi
<0.1 <0.1
Ag
<0.1 <0.1
Au (ppb)
6.8 2.4
Hg
<0.01 <0.01
Tl
0.1 <0.1
Cs
0.5 <0.1
Rb
11.5 <0.5
Sn
2 <1
Ta
0.4 <0.1
Th
0.4 <0.1
U
0.5 <0.1
W
<0.1 <0.1
Pr
3.21 0.41
Ho
2.18 0.6
Tb
1.49 0.37
Er
6.65 1.78
Tm
0.97 0.27
Yb
6.32 1.61

Notes: SRM = standard reference material., BIR-1 = USGS Icelandic basalt SRM, Leg 112 analyses are reported in Bunch and LaBorde (1976). Leg 201 analysis were conducted by inductively coupled plasma (ICP)-atomic emission spectrophotometry (major element oxides and Ba, Ni, Sc, and Cr) and ICP-mass spectrophotometry (all other trace elements). Leg 201 analysis were performed by Acme Labs, Vancouver, BC. The SRM was included in analytical suite as an unknown.