Table T4. Results of XRF and Rock-Eval analyses performed on four selected samples.

Hole:
184-1148A-
Core, section,
interval (cm):
2H-6,
26-28
2H-6,
31-33
6H-3,
119-21
6H-3,
121-123
Color:
Normal
Green
Normal
Green
Major element oxides (wt%):

SiO2 56.76 56.04 47.10 47.15
TiO2 0.66 0.68 0.66 0.64
Al2O3 16.66 16.50 15.09 14.84
Fe2O3 3.11 4.48 4.19 4.38
FeO 2.22 2.09 1.86 1.87
MnO 0.14 0.17 0.29 0.28
MgO 2.72 2.87 2.90 2.91
CaO 2.54 2.08 9.36 9.28
Na2O 3.32 3.28 2.15 2.12
K2O 3.25 3.28 2.65 2.68
P2O5 0.12 0.11 0.16 0.14
LOI (wt%): 8.15 8.12 13.70 13.61
Total (wt%): 99.65 99.71 100.11 99.90
Trace elements (ppm):

Ba 890 864 553 528
Cr 74 77 78 81
Cu 96 74 18 16
Nb 12 13 12 12
Ni 69 80 58 63
Pb <7 <7 <7 <7
Rb 140 143 113 118
Sr 215 191 389 385
V 134 130 124 124
Y 26 27 26 25
Zn 113 123 100 98
Zr 141 141 133 133
Total: 0.19 0.19 0.16 0.16
Fe total (%): 5.58 6.81 6.26 6.46
TOC (wt%): 0.43 0.29 0.25 0.24

Notes: LOI = loss on ignition, TOC = total organic carbon. Fe total = Fe2O3. XRF = X-ray fluorescence. Bold entries are major element oxides and trace elements used in the text to underline differences between GCL and host sediments.