Table T1.

Table T1. Strontium concentration and isotope composition for pore waters and sedimentary carbonates, Leg 171B.

Core Depth
(mbsf) Pore-water strontium concentration
(µg/L) Measured
pore-water
⁸⁷Sr/⁸⁶Sr Sedimentary
carbonate
⁸⁷Sr/⁸⁶Sr Strontium isotope
pore-water age
(Ma) Host sediment
age
(Ma)

171B-1049A-

3H
25.05
7.24
0.709128

1.21
-

4H
34.55
7.33
0.709098

1.70
41.0

5H
44.05
5.45
0.709105

1.53
43.0

6H
53.55
7.63
0.709076

2.60
45.0

9H
66.35
7.77
0.708986

6.16
49.5

10X
70.85
7.85
0.708966

6.61
51.0

12X
87.55
7.81
0.708924

9.03
53.0

16X
116.45
8.16
0.708836

12.38
64.0

19X
148.35
8.38
0.708695

16.91
108.0

22X
173.40
8.35
0.708712

16.47
114.0

171B-1050A-

1X
4.45
8.44
0.708951
0.707763
7.04
39.3

2H
14.55
8.70
0.708882
0.707762
10.50
40.0

3H
24.05
9.07
0.708821
0.707772
12.80
40.6

4H
33.55
9.40
0.708757
0.707775
15.59
41.3

5H
43.05
10.06
0.708667
0.707772
17.20
41.9

6H
52.55
10.82
0.708517
0.707747
19.08
42.6

9H
80.62
12.75
0.708362
0.707764
21.60
44.5

13X
119.25
15.16
0.708228
0.707769
24.29
47.2

16X
148.05
18.16
0.708069
0.707777
27.54
49.2

19X
176.85
21.63
0.707995
0.707714
29.52
51.1

22X
203.60
25.23
0.707961
0.707715
30.47
53.0

26X
240.60
30.60
0.707848
0.707753
33.19
55.5

29X
261.30
32.36
0.707820
0.707724
33.94
56.9

32X
288.60
29.43
0.707826
0.707793
33.78
58.8

35X
309.30
33.27
0.707803
0.707811
34.42
60.2

171B-1050C-

2R
330.00
36.32
0.707794
0.707828
34.70
61.7

5R
361.56
36.78
0.707786
0.707805
34.97
61.7

8R
386.24
38.38
0.707756
0.707821
36.26
63.6

13R
427.64
36.66
0.707759
0.707849
36.11
66.8

17R
464.65
36.17
0.707742
0.707812
37.13
69.7

21R
502.72

0.707479

93.4

23R
523.72

0.707425

95.5

26R
551.25
32.36
0.707764
0.707426
35.86
98.1

29R
580.05
34.96
0.707490
0.707435
36.65
100.9

31R
599.25
31.36
0.707802
0.707444
34.44
102.8

171B-1051A-

2H
10.25
7.58
0.709008

5.63
38.1

3H
19.75
7.44
0.708879

10.60
38.3

4H
29.25
9.50
0.708793

14.24
38.6

5H
38.75
9.64
0.708678

17.04
38.8

6H
48.25
10.56
0.708596

18.13
39.0

7H
57.75
11.23
0.708546

18.73
39.3

10H
86.25
13.43
0.708389

21.07
40.0

13H
114.75
17.02
0.708236

24.13
40.7

16H
143.2
18.96
0.708168

25.41
41.5

19X
172.2
20.87
0.708111

26.59
42.2

22X
201
21.09
0.708063

27.68
42.9

25X
229.8
24.19
0.708005

29.25
43.7

28X
258.6
26.29
0.707960

30.49
44.4

31X
287.4
34.52
0.707963

30.42
45.2

34X
316.2
34.55
0.707913

31.65
45.9

37X
345.1
37.34
0.707892

32.17
46.6

40X
374.1
38.18
0.707883

32.38
47.4

43X
403.9
60.83
0.707787

34.94
51.9

46X
432.7
63.41
0.707785

35.01
52.8

49X
458.5
60.36
0.707789

34.87
53.7

53X
490.5
64.96
0.707771

35.56
54.7

56X
522.25
68.34
0.707760

36.06
56.6

59X
548.05
76.34
0.707746

36.85
58.0

65X
596.15
76.94
0.707737

37.51
60.6

171B-1052A-

2X
7.95
7.55
0.708876

10.70
34.0

3H
17.65
9.22
0.708712

16.51
34.6

4H
27.15
10.61
0.708549

18.69
35.1

5H
36.65
11.54
0.708425

20.42
35.6

6H
46.15
12.97
0.708318

22.49
36.2

7H
55.65
14.36
0.708241

24.04
36.7

10H
84.15
17.93
0.708065

27.63
38.3

13H
112.65
22.86
0.707910

31.73
39.9

16X
132.65
24.20
0.707905

31.85
41.0

18X
150.15
30.23
0.707799

34.54
42.0

171B-1052E-

2R
147.33
30.38
0.707797

34.60
41.9

8R
206.85
50.93
0.707660

73.63
60.8

10R
227.6
55.10
0.707642

74.24
61.7

12R
245.09
54.70
0.707610

75.68
62.4

14R
262.79
58.87
0.707508

81.68
63.2

20R
323.65
76.02
0.707516

81.10
65.7

23R
351.18
73.94
0.707540

79.53
66.9

26R
381.45
78.24
0.707540

79.53
68.1

29R
410.25
85.34
0.707520

80.82
69.3

33R
444.63
79.59
0.707502

82.04
70.8

46R
573.61
125.73
0.707403

86.36
100.2

49R
603.17
131.25
0.707403

86.36
100.8

52R
624.55
146.44
0.707342

88.20
101.2

55R
649.25
138.87
0.707387

86.89
101.8

171B-1053A-

1H
4.45
7.61
0.708997

5.80
34.2

3H
23.45
10.33
0.708582

18.31
34.6

4H
32.95
11.95
0.708502

19.27
34.8

5H
42.45
12.78
0.708372

21.41
35.0

42.45
12.78
0.708385

21.15
35.0

6H
51.95
14.19
0.708298

22.92
35.2

9H
80.45
17.74
0.708123

26.33
35.8

12H
108.45
21.92
0.708016

28.95
36.4

15H
137.45
28.02
0.707931

31.21
37.0

Core	Depth (mbsf)	Pore-water strontium concentration (µg/L)	Measured pore-water ⁸⁷Sr/⁸⁶Sr	Sedimentary carbonate ⁸⁷Sr/⁸⁶Sr	Strontium isotope pore-water age (Ma)	Host sediment age (Ma)
171B-1049A-
3H	25.05	7.24	0.709128		1.21	-
4H	34.55	7.33	0.709098		1.70	41.0
5H	44.05	5.45	0.709105		1.53	43.0
6H	53.55	7.63	0.709076		2.60	45.0
9H	66.35	7.77	0.708986		6.16	49.5
10X	70.85	7.85	0.708966		6.61	51.0
12X	87.55	7.81	0.708924		9.03	53.0
16X	116.45	8.16	0.708836		12.38	64.0
19X	148.35	8.38	0.708695		16.91	108.0
22X	173.40	8.35	0.708712		16.47	114.0
171B-1050A-
1X	4.45	8.44	0.708951	0.707763	7.04	39.3
2H	14.55	8.70	0.708882	0.707762	10.50	40.0
3H	24.05	9.07	0.708821	0.707772	12.80	40.6
4H	33.55	9.40	0.708757	0.707775	15.59	41.3
5H	43.05	10.06	0.708667	0.707772	17.20	41.9
6H	52.55	10.82	0.708517	0.707747	19.08	42.6
9H	80.62	12.75	0.708362	0.707764	21.60	44.5
13X	119.25	15.16	0.708228	0.707769	24.29	47.2
16X	148.05	18.16	0.708069	0.707777	27.54	49.2
19X	176.85	21.63	0.707995	0.707714	29.52	51.1
22X	203.60	25.23	0.707961	0.707715	30.47	53.0
26X	240.60	30.60	0.707848	0.707753	33.19	55.5
29X	261.30	32.36	0.707820	0.707724	33.94	56.9
32X	288.60	29.43	0.707826	0.707793	33.78	58.8
35X	309.30	33.27	0.707803	0.707811	34.42	60.2
171B-1050C-
2R	330.00	36.32	0.707794	0.707828	34.70	61.7
5R	361.56	36.78	0.707786	0.707805	34.97	61.7
8R	386.24	38.38	0.707756	0.707821	36.26	63.6
13R	427.64	36.66	0.707759	0.707849	36.11	66.8
17R	464.65	36.17	0.707742	0.707812	37.13	69.7
21R	502.72			0.707479		93.4
23R	523.72			0.707425		95.5
26R	551.25	32.36	0.707764	0.707426	35.86	98.1
29R	580.05	34.96	0.707490	0.707435	36.65	100.9
31R	599.25	31.36	0.707802	0.707444	34.44	102.8
171B-1051A-
2H	10.25	7.58	0.709008		5.63	38.1
3H	19.75	7.44	0.708879		10.60	38.3
4H	29.25	9.50	0.708793		14.24	38.6
5H	38.75	9.64	0.708678		17.04	38.8
6H	48.25	10.56	0.708596		18.13	39.0
7H	57.75	11.23	0.708546		18.73	39.3
10H	86.25	13.43	0.708389		21.07	40.0
13H	114.75	17.02	0.708236		24.13	40.7
16H	143.2	18.96	0.708168		25.41	41.5
19X	172.2	20.87	0.708111		26.59	42.2
22X	201	21.09	0.708063		27.68	42.9
25X	229.8	24.19	0.708005		29.25	43.7
28X	258.6	26.29	0.707960		30.49	44.4
31X	287.4	34.52	0.707963		30.42	45.2
34X	316.2	34.55	0.707913		31.65	45.9
37X	345.1	37.34	0.707892		32.17	46.6
40X	374.1	38.18	0.707883		32.38	47.4
43X	403.9	60.83	0.707787		34.94	51.9
46X	432.7	63.41	0.707785		35.01	52.8
49X	458.5	60.36	0.707789		34.87	53.7
53X	490.5	64.96	0.707771		35.56	54.7
56X	522.25	68.34	0.707760		36.06	56.6
59X	548.05	76.34	0.707746		36.85	58.0
65X	596.15	76.94	0.707737		37.51	60.6
171B-1052A-
2X	7.95	7.55	0.708876		10.70	34.0
3H	17.65	9.22	0.708712		16.51	34.6
4H	27.15	10.61	0.708549		18.69	35.1
5H	36.65	11.54	0.708425		20.42	35.6
6H	46.15	12.97	0.708318		22.49	36.2
7H	55.65	14.36	0.708241		24.04	36.7
10H	84.15	17.93	0.708065		27.63	38.3
13H	112.65	22.86	0.707910		31.73	39.9
16X	132.65	24.20	0.707905		31.85	41.0
18X	150.15	30.23	0.707799		34.54	42.0
171B-1052E-
2R	147.33	30.38	0.707797		34.60	41.9
8R	206.85	50.93	0.707660		73.63	60.8
10R	227.6	55.10	0.707642		74.24	61.7
12R	245.09	54.70	0.707610		75.68	62.4
14R	262.79	58.87	0.707508		81.68	63.2
20R	323.65	76.02	0.707516		81.10	65.7
23R	351.18	73.94	0.707540		79.53	66.9
26R	381.45	78.24	0.707540		79.53	68.1
29R	410.25	85.34	0.707520		80.82	69.3
33R	444.63	79.59	0.707502		82.04	70.8
46R	573.61	125.73	0.707403		86.36	100.2
49R	603.17	131.25	0.707403		86.36	100.8
52R	624.55	146.44	0.707342		88.20	101.2
55R	649.25	138.87	0.707387		86.89	101.8
171B-1053A-
1H	4.45	7.61	0.708997		5.80	34.2
3H	23.45	10.33	0.708582		18.31	34.6
4H	32.95	11.95	0.708502		19.27	34.8
5H	42.45	12.78	0.708372		21.41	35.0
	42.45	12.78	0.708385		21.15	35.0
6H	51.95	14.19	0.708298		22.92	35.2
9H	80.45	17.74	0.708123		26.33	35.8
12H	108.45	21.92	0.708016		28.95	36.4
15H	137.45	28.02	0.707931		31.21	37.0

Notes: Strontium isotope pore-water age was obtained using measured ⁸⁷Sr/⁸⁶Sr values and the strontium isotope look-up table of Howarth and McArthur (1997). Host sediment age was estimated using short linear regressions between hiatuses fit to age vs. depth plots derived from biostratigraphy. See "Results" for details.