| Hole: | 1139A | 1139A | 1139A | 1139A | 1139A | 1139A |
|---|---|---|---|---|---|---|
| Core, section: | 70R-1 | 70R-2 | 71R-4 | 71R-7 | 72R-2 | 73R-3 |
| Interval (cm): | 17-20 | 141-145 | 135-138 | 25-27 | 57-60 | 39-42 |
| Piece: | 2A | 1F | 1I | 1B | 2B | 2B |
| Unit: | 18 | 18 | 19 | 19 | 19 | 19 |
| Rock type: | Sanidine-phyric trachyandesite | Sanidine-phyric trachyandesite (altered) | Sanidine-phyric trachyte | Sanidine-phyric trachyte | Sanidine-phyric trachyte | Sanidine-phyric trachyte |
| Depth (mbsf): | 661.67 | 664.13 | 675.55 | 678.7 | 682.3 | 692.89 |
| Major element oxides (wt%) | ||||||
| SiO2 | 59.46 |
61.68
|
67.86
|
70.68
|
70.00
|
68.44
|
| TiO2 | 1.02 |
1.00
|
0.50
|
0.50
|
0.49
|
0.54
|
| Al2O3 | 18.59 |
15.95
|
13.30
|
14.24
|
13.67
|
14.29
|
| Fe2O3 | 10.57 |
11.36
|
10.10
|
3.84
|
5.94
|
6.88
|
| MnO | 0.11 |
0.29
|
0.15
|
0.11
|
0.16
|
0.23
|
| MgO | 0.76 |
0.51
|
0.83
|
0.09
|
0.14
|
0.14
|
| CaO | 0.02 |
0
|
0.28
|
0.36
|
0
|
0
|
| Na2O | 3.36 |
2.96
|
2.39
|
3.64
|
3.55
|
3.29
|
| K2O | 5.41 |
3.90
|
5.01
|
6.57
|
6.48
|
5.25
|
| P2O5 | 0.01 |
0.17
|
0.03
|
0.01
|
0
|
0
|
| Total | 99.30 |
97.81
|
100.42
|
100.04
|
100.42
|
99.05
|
| Mg#* | 0.09 |
0.06
|
0.10
|
0.03
|
0.03
|
0.03
|
| LOI** | 1.89 |
7.02
|
6.02
|
1.87
|
2.65
|
3.21
|
| CO2 | 2.3 |
7.9
|
7.3
|
2.1
|
2.9
|
3.8
|
| H2O | 2.2 |
1.5
|
1.7
|
0.8
|
0.9
|
0.8
|
| Trace elements (ppm) |
|
|
|
|
|
|
| Rb | 41 |
42
|
87
|
146
|
139
|
116
|
| Ba | 290 |
268
|
123
|
130
|
118
|
69
|
| Sr | 23 |
9
|
25
|
12
|
8
|
9
|
| Nb | 84 |
65
|
166
|
189
|
182
|
161
|
| Zr | 521 |
420
|
1131
|
1467
|
1372
|
1104
|
| Y | 54 |
49
|
50
|
49
|
156
|
296
|
| V | 13 |
13
|
15
|
20
|
19
|
17
|
| Cr | 17 |
13
|
12
|
20
|
18
|
13
|
| Ni | 2 |
1
|
1
|
2
|
3
|
3
|
| Cu |
|
|
5
|
6
|
6
|
|
| Zn | 209 |
207
|
212
|
76
|
164
|
221
|
| Normative mineralogy |
|
28.0
|
21.9
|
21.4
|
26.0
|
|
| Q | 13.4 |
23.9
|
29.7
|
38.9
|
38.3
|
31.5
|
| Or | 32.4 |
23.7
|
20.3
|
30.8
|
30.0
|
28.2
|
| Ab | 28.9 |
25.8
|
1.2
|
1.7
|
|
|
| An |
|
3.5
|
0.5
|
0.8
|
3.3
|
|
| Corundum | 7.3 |
7.1
|
|
|
|
|
| Nepheline |
|
|
|
|
|
|
| Leucite |
|
|
|
|
|
|
| Acmite |
|
|
|
|
|
|
| Na Metasilicate |
|
|
|
|
|
|
| Wo (Di) |
|
|
|
|
|
|
| En (Di) |
|
|
|
|
|
|
| Fs (Di |
|
2.1
|
0.1
|
0.3
|
0.4
|
|
| En (Hy) | 1.9 |
1.3
|
11.2
|
3.8
|
6.4
|
7.6
|
| Fs (Hy) | 10.9 |
12.4
|
|
|
|
|
| Ol (Fo) |
|
|
|
|
|
|
| Ol (Fa) |
|
0.9
|
1.0
|
0.9
|
1.0
|
|
| Ilmenite | 2.0 |
2.0
|
2.9
|
1.1
|
1.7
|
2.0
|
| Magnetite | 3.1 |
3.4
|
0.1
|
|
|
|
| Apatite |
0.4
|
99.9
|
99.9
|
99.9
|
99.9
|
|
| Total: | 99.9 |
99.9
|
28.0
|
|
|
|
Notes: * = determined using Mg# = MgO/(MgO + Fe), mol%, with FeO calculated (as 80% of total Fe). ** = loss on ignition at 1025°C for 4 hr.