Table 4.

Table 4. Carbon, oxygen, and strontium isotopic composition of microdrilled samples from Site 996 and pore water Sr isotopic composition from Sites 994 to 997.

Core, section, interval (cm) Depth (mbsf) C and O isotopes ()
Sr isotopes
Comment

¹⁸O ¹³C ⁸⁷Sr/⁸⁶Sr Standard error (1)

164-996A-

1H-1, 0-1
0.00

0.709141
0.000008

Chester

1H-1, 21-23
0.21
3.5
-47.2

0.709200
0.000008

1H-1, 21-23
0.21
3.3
-36.1

0.709172
0.000009

1H-1, 32-34
0.32
3.8
-44.3

1H-1, 63-65
0.63
3.9
-42.8

1H-1, 63-65
0.63
3.6
-44.5

1H-2, 15-16
1.05
3.6
-44.3

1H-2, 15-16
1.05
3.5
-41.5

1H-2, 15-16
1.05
3.7
-44.9

1H-2, 15-16
1.05
3.8
-48.2

1H-2, 15-16
1.05
3.8
-48.4

1H-2, 15-16
1.05
3.6
-46.9

1H-2, 15-16
1.05
3.7
-47.1

1H-2, 15-16
1.05
3.7
-45.7

1H-2, 39-41
1.29
3.6
-43.3

Clast

1H-2, 39-41
1.29
3.5
-48.1

0.70919
0.000007

1H-2, 56-58
1.46
3.3
-37.2

1H-2, 56-58
1.46
3.6
-42.0

Clast

1H-2, 56-58
1.46
3.5
-39.6

3X-1, 50-52
10.00
4.1
-34.2

Clast

3X-1, 50-52
10.00
4.2
-36.6

0.709146
0.000007

164-996B-

1H-1, 0-5
0.00
3.6
-41.6

1H-1, 0-5
0.00
3.6
-42.5

1H-1, 0-5
0.00
3.6
-41.9

1H-1, 0-5
0.00
3.8
-41.9

Clast

1H-1, 0-5
0.00
3.7
-42.3

164-996C-

1H-1, 0-1
0.00

0.709173
0.000007

Bivalve shell

1H-1, 51-53
0.51
3.9
-41.5

0.709133
0.000007

1H-1, 70-72
0.70
3.9
-42.8

2H-CC, 0-2
2.40
3.4
-40.3

2H-CC, 0-2
2.40
3.5
-41.6

164-996D-

3X-CC, 9-11
13.09
4.4
-3.9

0.709085
0.000007

Bivalve shell

3X-CC, 9-11
13.09
4.5
-39.1

0.709206
0.000006

5X-CC, 7-9
32.17
4.4
-44.8

0.709125
0.000007

Pure aragonite

5X-CC, 7-9
32.17
4.2
-39.1

Pure aragonite

5X-CC, 7-9
32.17
4.3
-44.6

0.709146
0.000008

Pure aragonite

5X-CC, 7-9
32.17

0.709132
0.000008

Pure aragonite

5X-CC, 23-25
32.33
4.2
-43.3

5X-CC, 23-25
32.33
4.2
-43.1

Clast

5X-CC, 23-25
32.33
4.1
-42.5

Clast

5X-CC, 23-25
32.33
3.9
-42.8

Pure aragonite

164-996E-

3X-CC, 0-7
13.60
4.2
-45.2

3X-CC, 0-7
13.60
4.7
-46.0

Aragonite needle

3X-CC, 8-12
13.68
3.7
-37.5

3X-CC, 8-12
13.68
3.9
-37.8

3X-CC, 12-15
13.72
3.9
-34.1

3X-CC, 12-15
13.72
4.6
-36.6

Pure aragonite

3X-CC, 12-15
13.72
4.4
-38.8

Pure aragonite

3X-CC, 12-15
13.72
4.5
-43.5

Pure aragonite

3X-CC, 12-15
13.72
4.2
-40.3

Pure aragonite

3X-CC, 12-15
13.72
4.5
-36.9

Pure aragonite

3X-CC, 21-25
13.81
3.8
-35.8

0.709148
0.000008

3X-CC, 21-25
13.81
4.5
-45.1

0.709168
0.000008

Pure aragonite

3X-CC, 21-25
13.81
4.4
-42.5

Pure aragonite

3X-CC, 21-25
13.81
4.3
-44.9

0.709163
0.000008

Pure aragonite

3X-CC, 21-25
13.81
4.9
-46.9

0.709181
0.000007

Pure aragonite

6X-CC, 11-13
51.62
4.8
-19.2

Dolomite

6X-CC, 11-13
51.62
5.4
-13.1

Dolomite

164-996A-

1H-6, 33-38
3.62

0.709174
0.000007

Pore water

3X-1, 61-71
10.11

0.709167
0.000006

Pore water

8H-2, 0-2
49.61

0.709168
0.000006

Pore water

9H-3, 87-102
61.55

0.709154
0.000007

Pore water

164-996E-

2H-2, 135-150
6.95

0.709130
0.000006

Pore water

6X-6, 135-150
50.86

0.709156
0.000008

Pore water

164-994A-

1H-5, 140-145
7.40

0.709165
0.000007

Pore water

4H-4, 140-145
31.89

0.709182
0.000006

Pore water

164-994C-

7H-4, 140-145
57.85

0.709169
0.000006

Pore water

164-995A-

2H-2, 150-155
4.75

0.709204
0.000005

Pore water

5H-5, 145-150
37.65

0.709180
0.000008

Pore water

164-997A-

2H-2, 140-145
5.80

0.709170
0.000006

Pore water

4H-4, 140-145
27.80

0.709175
0.000007

Pore water

3H-2, 145-150
16.80

0.709145
0.000007

Pore water

9H-2, 145-150
64.30

0.709161
0.000009

Pore water

Core, section, interval (cm)	Depth (mbsf)	C and O isotopes ()		Sr isotopes		Comment
Core, section, interval (cm)	Depth (mbsf)	¹⁸O	¹³C	⁸⁷Sr/⁸⁶Sr	Standard error (1)	Comment
164-996A-
1H-1, 0-1	0.00			0.709141	0.000008	Chester
1H-1, 21-23	0.21	3.5	-47.2	0.709200	0.000008
1H-1, 21-23	0.21	3.3	-36.1	0.709172	0.000009
1H-1, 32-34	0.32	3.8	-44.3
1H-1, 63-65	0.63	3.9	-42.8
1H-1, 63-65	0.63	3.6	-44.5
1H-2, 15-16	1.05	3.6	-44.3
1H-2, 15-16	1.05	3.5	-41.5
1H-2, 15-16	1.05	3.7	-44.9
1H-2, 15-16	1.05	3.8	-48.2
1H-2, 15-16	1.05	3.8	-48.4
1H-2, 15-16	1.05	3.6	-46.9
1H-2, 15-16	1.05	3.7	-47.1
1H-2, 15-16	1.05	3.7	-45.7
1H-2, 39-41	1.29	3.6	-43.3			Clast
1H-2, 39-41	1.29	3.5	-48.1	0.70919	0.000007
1H-2, 56-58	1.46	3.3	-37.2
1H-2, 56-58	1.46	3.6	-42.0			Clast
1H-2, 56-58	1.46	3.5	-39.6
3X-1, 50-52	10.00	4.1	-34.2			Clast
3X-1, 50-52	10.00	4.2	-36.6	0.709146	0.000007
164-996B-
1H-1, 0-5	0.00	3.6	-41.6
1H-1, 0-5	0.00	3.6	-42.5
1H-1, 0-5	0.00	3.6	-41.9
1H-1, 0-5	0.00	3.8	-41.9			Clast
1H-1, 0-5	0.00	3.7	-42.3
164-996C-
1H-1, 0-1	0.00			0.709173	0.000007	Bivalve shell
1H-1, 51-53	0.51	3.9	-41.5	0.709133	0.000007
1H-1, 70-72	0.70	3.9	-42.8
2H-CC, 0-2	2.40	3.4	-40.3
2H-CC, 0-2	2.40	3.5	-41.6
164-996D-
3X-CC, 9-11	13.09	4.4	-3.9	0.709085	0.000007	Bivalve shell
3X-CC, 9-11	13.09	4.5	-39.1	0.709206	0.000006
5X-CC, 7-9	32.17	4.4	-44.8	0.709125	0.000007	Pure aragonite
5X-CC, 7-9	32.17	4.2	-39.1			Pure aragonite
5X-CC, 7-9	32.17	4.3	-44.6	0.709146	0.000008	Pure aragonite
5X-CC, 7-9	32.17			0.709132	0.000008	Pure aragonite
5X-CC, 23-25	32.33	4.2	-43.3
5X-CC, 23-25	32.33	4.2	-43.1			Clast
5X-CC, 23-25	32.33	4.1	-42.5			Clast
5X-CC, 23-25	32.33	3.9	-42.8			Pure aragonite
164-996E-
3X-CC, 0-7	13.60	4.2	-45.2
3X-CC, 0-7	13.60	4.7	-46.0			Aragonite needle
3X-CC, 8-12	13.68	3.7	-37.5
3X-CC, 8-12	13.68	3.9	-37.8
3X-CC, 12-15	13.72	3.9	-34.1
3X-CC, 12-15	13.72	4.6	-36.6			Pure aragonite
3X-CC, 12-15	13.72	4.4	-38.8			Pure aragonite
3X-CC, 12-15	13.72	4.5	-43.5			Pure aragonite
3X-CC, 12-15	13.72	4.2	-40.3			Pure aragonite
3X-CC, 12-15	13.72	4.5	-36.9			Pure aragonite
3X-CC, 21-25	13.81	3.8	-35.8	0.709148	0.000008
3X-CC, 21-25	13.81	4.5	-45.1	0.709168	0.000008	Pure aragonite
3X-CC, 21-25	13.81	4.4	-42.5			Pure aragonite
3X-CC, 21-25	13.81	4.3	-44.9	0.709163	0.000008	Pure aragonite
3X-CC, 21-25	13.81	4.9	-46.9	0.709181	0.000007	Pure aragonite
6X-CC, 11-13	51.62	4.8	-19.2			Dolomite
6X-CC, 11-13	51.62	5.4	-13.1			Dolomite
164-996A-
1H-6, 33-38	3.62			0.709174	0.000007	Pore water
3X-1, 61-71	10.11			0.709167	0.000006	Pore water
8H-2, 0-2	49.61			0.709168	0.000006	Pore water
9H-3, 87-102	61.55			0.709154	0.000007	Pore water
164-996E-
2H-2, 135-150	6.95			0.709130	0.000006	Pore water
6X-6, 135-150	50.86			0.709156	0.000008	Pore water
164-994A-
1H-5, 140-145	7.40			0.709165	0.000007	Pore water
4H-4, 140-145	31.89			0.709182	0.000006	Pore water
164-994C-
7H-4, 140-145	57.85			0.709169	0.000006	Pore water
164-995A-
2H-2, 150-155	4.75			0.709204	0.000005	Pore water
5H-5, 145-150	37.65			0.709180	0.000008	Pore water
164-997A-
2H-2, 140-145	5.80			0.709170	0.000006	Pore water
4H-4, 140-145	27.80			0.709175	0.000007	Pore water
3H-2, 145-150	16.80			0.709145	0.000007	Pore water
9H-2, 145-150	64.30			0.709161	0.000009	Pore water