Basement*
|
Sediment†
|
Change‡ (%)
|
|
|---|---|---|---|
| Major element oxide (wt%): | |||
| SiO2 | 59.16 | 52.57 | -11 |
| TiO2 | 2.15 | 3.34 | 55 |
| Al2O3 | 15.54 | 15.18 | -2 |
| Fe2O3 | 9.96 | 11.10 | 11 |
| MnO | 0.20 | 0.07 | -67 |
| MgO | 1.32 | 2.94 | 122 |
| CaO | 3.52 | 3.80 | 8 |
| Na2O | 3.47 | 3.88 | 12 |
| K2O | 4.16 | 3.03 | -27 |
| P2O5 | 0.74 | 0.42 | -43 |
| Trace element (ppm): | |||
| Rb | 72 | 46 | -36 |
| Ba | 641 | 1304 | 104 |
| Sr | 228 | 613 | 169 |
| Nb | 100 | 58 | -42 |
| Zr | 602 | 330 | -45 |
| Y | 66 | 17 | -74 |
| V | 139 | 174 | 26 |
| Cr | 18 | 114 | 545 |
| Ni | 4 | 47 | 983 |
| Zn | 191 | 225 | 18 |
Notes: * = mean of 23 basement analyses (Shipboard Scientific Party, 2000). † = mean of treated samples from this study. ‡ = 100 x (sediment - basement)/basement.