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Table T9. Closed system age interpretations for U-Th dated samples, Expedition 325. (See table notes.)
Core, section,
interval (cm)
|
Age (k.y. BP)
|
2σ
|
[234U/238U]i
|
2σ
|
|
325-
|
|
M0031A-16R-1, 0–3
|
25.13
|
0.24
|
1.1413
|
0.0008
|
|
M0032A-8R-3, 0–2
|
20.42
|
0.24
|
1.1411
|
0.0007
|
|
M0032A-18R-2, 8–10
|
61.10
|
0.80
|
1.1442
|
0.0009
|
|
M0033A-15R-2, 5–7
|
31.07
|
0.32
|
1.1413
|
0.0008
|
|
M0034A-13R-2, 6–8
|
11.18
|
0.11
|
1.1471
|
0.0008
|
|
M0035A-20R-2, 0–2
|
21.33
|
0.20
|
1.1418
|
0.0008
|
|
M0036A-18R-2, 8–10
|
20.82
|
0.19
|
1.1423
|
0.0008
|
|
M0037A-7R-2, 2–4
|
12.54
|
0.11
|
1.1411
|
0.0008
|
|
M0039A-16R-2, 8–10
|
18.82
|
0.15
|
1.1439
|
0.0008
|
|
M0040A-8R-2, 5–8
|
24.73
|
0.22
|
1.1394
|
0.0008
|
|
M0042A-24R-2, 8–9
|
169.30
|
4.50
|
1.1533
|
0.0022
|
|
M0043A-18R-2, 2–4
|
20.28
|
0.20
|
1.1419
|
0.0008
|
|
M0046A-11R-1, 10–11
|
17.19
|
0.16
|
1.1446
|
0.0008
|
|
M0047A-11R-2, 5–6
|
20.78
|
0.19
|
1.1430
|
0.0008
|
|
M0049B-9R-2, 4–5
|
15.80
|
0.15
|
1.1515
|
0.0008
|
|
M0053A-25R-2, 2–3
|
23.65
|
0.24
|
1.1406
|
0.0008
|
|
M0054B-4R-2, 2–3
|
20.08
|
0.18
|
1.1434
|
0.0008
|
|
M0055A-5R-3, 0–1
|
25.05
|
0.25
|
1.1403
|
0.0008
|
|
M0056A-13R-2, 2–3
|
84.10
|
1.10
|
1.1347
|
0.0010
|
|
M0057A-15R-3, 9–10
|
No closed system age possible
|
Notes: Ages are presented in thousands of years before AD 1950 so as to be comparable to calibrated radiocarbon ages. [234U/238U]i is [234U/238U] extrapolated back to the time of coral growth.
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