Citation:

dsdp.proc.94.127.1987

Name: Stable carbon and oxygen isotope ratios of foraminifera from DSDP Site 94-606
Creator: Lloyd D Keigwin
Published: 1987
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Stable-isotope analysis of two species of benthic foraminifers (Planulina wuellerstorfi and Globocassidulina subglobosa) and one planktonic species (Globigerina bulloides) from DSDP Site 606 reveals the evolution of late Pliocene climate change. No 'stepwise' increase is evident in the delta18O record at 3.2 Ma, but events of 18O-enrichment of increasing magnitude occurred at 3.1, 2.7, 2.6, and 2.4 Ma. The two youngest events are correlated with events indicating glaciation at northeast Atlantic DSDP Hole 552A (Shackleton et al., 1984, doi:10.1038/307620a0). The oldest delta18O spike, centered within the Mammoth Paleomagnetic Event, is the most prominent feature of results for the interval between 3 and 4 Ma. This isotope event is interpreted as evidence of 2°C bottom-water cooling combined with minor glaciation.

Carbon-isotope results for P. wuellerstorfi indicate that Site 606 has been under the influence of North Atlantic Deep Water for most of the interval from 2 to 4 Ma. A significant change in 'vital effect' on G. subglobosa at 2.4 Ma is evident in the delta13C record. Specimens dating from that time become smaller and less abundant than older specimens, and have delta13C values lowered by as much as lâ. This effect could introduce a significant artifact into data sets where various species are 'corrected' to P. wuellerstorfi.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Latitude: 37.338450 * Longitude: -35.500050

Date/Time Start: 1983-07-02T00:00:00 * Date/Time End: 1983-07-02T00:00:00

Minimum DEPTH, sediment/rock: 60.45 m * Maximum DEPTH, sediment/rock: 164.65 m

Event(s):

94-606_Site * Latitude: 37.338450 * Longitude: -35.500050 * Date/Time: 1983-07-02T00:00:00 * Penetration: 3.441 m * Recovery: 3.104 m * Location: North Atlantic/FLANK * Campaign: * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 37 cores; 344.1 m cored; 0 m drilled; 90.2% recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Globigerina bulloides, δ18O	G. bulloides δ18O	‰ PDB	Keigwin, Lloyd D	Mass spectrometer VG Micromass 602	180-300 µm
3	Globigerina bulloides, δ13C	G. bulloides δ13C	‰ PDB	Keigwin, Lloyd D	Mass spectrometer VG Micromass 602	180-300 µm
4	Planulina wuellerstorfi, δ18O	P. wuellerstorfi δ18O	‰ PDB	Keigwin, Lloyd D	Mass spectrometer VG Micromass 602	>150 µm
5	Planulina wuellerstorfi, δ13C	P. wuellerstorfi δ13C	‰ PDB	Keigwin, Lloyd D	Mass spectrometer VG Micromass 602	>150 µm
6	Globocassidulina subglobosa, δ18O	G. subglobosa δ18O	‰ PDB	Keigwin, Lloyd D	Mass spectrometer VG Micromass 602	>150 µm
7	Globocassidulina subglobosa, δ13C	G. subglobosa δ13C	‰ PDB	Keigwin, Lloyd D	Mass spectrometer VG Micromass 602	>150 µm

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

1587 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Depth sed [m]	2 G. bulloides δ18O [‰ PDB]	3 G. bulloides δ13C [‰ PDB]	4 P. wuellerstorfi δ18O [‰ PDB]	5 P. wuellerstorfi δ13C [‰ PDB]	6 G. subglobosa δ18O [‰ PDB]	7 G. subglobosa δ13C [‰ PDB]
60.45	1.60	-0.36	3.37	1.02
60.95	0.87	-0.35
61.45	0.95	-0.44	3.27	1.14
61.95	1.25	-0.02	2.76	0.73
61.95	1.25	-0.58
62.45	1.39	-0.67	3.74	0.68
62.95	1.60	-0.90	3.58	0.57	3.62	-0.67
63.45	0.87	-0.43	3.02	0.88	3.35	-0.41
63.95	1.17	-0.49	3.18	0.81
64.45	1.34	-0.65
64.46			3.15	0.60
64.95	0.82	-0.44	3.02	1.10
65.45	1.42	-0.72	3.67	0.39
65.95	1.80	-0.32	3.19	0.99
66.45	0.76	-0.27	3.14	1.21
66.95	1.06	-0.63	3.23	0.76	3.00	-0.32
67.46	1.02	-0.29	2.49	0.56
67.95	0.81	-0.60
68.45	1.09	-0.74	2.83	0.60	3.35	-0.90
68.45	1.09	-0.83
68.97	1.32	-0.17	2.85	0.73
70.05	1.45	-0.74	3.21	0.72
70.25	1.28	-0.50	3.14	0.56
70.25	1.28		3.15	0.91
70.55	1.00	-0.45			2.58	-0.73
70.75	1.06	-0.36
71.05	0.93	-0.03	2.49	0.65	2.83	-0.51
71.25	1.48	-0.38	2.97	0.56
71.55	0.75	0.00	2.52	0.54
71.75	0.72	-0.43	2.49	0.82
72.05	1.36	-0.24			3.22	-0.23
72.25	1.32	-0.23	3.10	0.77	3.66	-0.12
72.55	1.26	0.00	2.56	1.13	2.75	0.30
72.55	1.26	-0.06
72.75	0.86	0.35	2.36	0.86
73.05	0.66	-0.35	2.54	0.84	2.92	0.67
73.25	1.04	0.30	2.95	0.95	3.63	0.40
73.55	1.18	0.39
73.65	1.00	0.19
73.75	1.35	0.31			4.20	-0.01
73.85	0.78	0.24	2.92	0.32
74.05	0.99	0.03	2.30	0.80
74.25	1.12	-0.06	2.44	0.60
74.43	0.45	-0.33	3.52	0.96	3.13	0.04
74.43	0.45	-0.55
74.55	1.10	-0.85			3.09	-0.98
74.75	1.46	-0.56	3.47	0.70
74.88	1.43	-0.12			4.07	0.34
75.05	1.40	-0.77			3.49	-0.24
75.25	1.18	-0.18	2.97	0.79
75.40	0.83	-0.29	2.60	0.88
75.40	0.83	-0.30
75.55	1.03	0.02
75.75	0.99	-0.15	2.37	0.87
75.90	0.79	-0.43
76.05	0.97	-0.59	2.93	1.11	3.14	-0.10
76.25	1.54	-0.88	2.86	-0.96	3.59	-0.82
76.38	1.51	-0.46	3.48	0.53
76.55	1.67	-0.36	2.65	0.43
76.75	0.56	-0.62	2.64	0.75
76.90	0.73	-0.54	2.64	0.92
77.05	0.82	-0.56	2.60	0.83
77.25	0.80	-0.80	2.55	0.66	3.22	-0.16
77.45	0.72	-1.15	3.63	0.57	4.10	0.20
77.55	1.38	-1.20	3.22	0.24	3.93	-0.11
77.55	1.38		3.61	0.48	4.25	0.12
77.55	1.38				4.20	0.11
77.65	1.31	-0.79	3.78	0.78	4.29	0.38
77.65	1.31				4.08	-0.02
77.75	0.77	-0.66	3.44	0.19	4.39	-0.02
77.75	0.77				4.15	-0.01
77.75	0.77				4.03	0.14
77.75	0.77				4.18	-0.10
77.85	1.29	-0.76	3.49	0.37	4.01	-0.29
77.85	1.29				4.21	-0.06
77.85	1.29				4.18	-0.28
77.85	1.29				4.36	-0.28
77.99	1.24	-0.60	3.28	0.58
78.05	1.21	-0.75
78.05	1.21	-0.63
78.15	0.94	0.05	2.90	1.01
78.25	1.04	-0.07	3.10	0.97	4.12	0.01
78.35	0.76	-0.23			3.65	0.83
78.45	0.63	-0.18	2.88	1.13	3.32	0.75
78.55	0.49	-0.47			2.71	0.52
78.65	0.79	-0.28			3.20	0.74
78.65	0.79	-0.46
78.75	0.40	-0.46	3.21	1.04	2.95	0.75
78.85	0.63	-0.15	2.86	1.07	3.24	0.70
78.95	0.93	0.13	2.93	1.02	3.18	0.50
79.05	0.69	-0.38			2.71	0.25
79.15	0.83	-0.33			3.45	0.65
79.25	0.94	-0.28	2.97	0.86
79.65	0.68	-0.54			3.03	0.20
79.65	0.68				2.25	0.47
79.85	0.02	-0.31			3.06	0.61
79.85	0.02	-0.57
79.95	0.89	-0.31	2.80	0.74
80.15	0.70	-0.55
80.35	0.89	-0.46			3.43	0.12
80.55	1.14	-0.77	3.44	0.59	3.69	-0.34
80.65	1.24	0.04	2.96	0.68	3.42	0.43
80.95	1.13	-0.15
81.15	0.90	-0.48
81.25	0.69	-0.33	2.82	0.97	3.13	0.45
81.25	0.69				3.31	0.58
81.25	0.69				3.05	0.29
81.49	0.78	-0.37			3.52	0.63
81.65	0.93	-0.44	2.73	0.91	3.43	0.52
81.65	0.93				3.48	0.76
81.85	1.63	-0.15	3.17	0.94	3.83	0.67
82.05	0.79	-0.12	3.11	0.87	3.87	0.61
82.05	0.79	-0.34
82.15	0.87	-0.23			2.85	0.10
82.45	0.72	-0.32	2.50	0.98	3.16	0.77
82.45	0.72				3.19	0.82
82.65	0.69	-0.39	2.56	0.65	3.19	0.77
82.89	0.94	-0.36			3.40	0.86
82.89	0.94				3.23	0.78
83.15	1.54	-0.59			3.53	0.47
83.15	1.54	-0.69			3.52	-0.15
83.45	1.18	-0.33			3.78	0.66
83.65	0.85	-0.18	2.47	0.71	3.40	0.56
83.65	0.85				3.60	0.73
83.85	1.26	-0.32			3.63	0.11
83.95	0.91	-0.99			3.85	0.33
84.05	1.04	-0.98	3.26	0.22	4.00	0.41
84.15	0.71	-0.62	3.11	0.57	4.08	0.45
84.15	0.71				3.91	-0.14
84.25	1.19	-0.91	3.39	0.65	3.95	0.29
84.35	1.00	-0.64
84.45	1.23	-0.50	2.48	0.95	3.67	0.46
84.65	1.13	-0.32	3.33	1.09	3.72	0.45
84.65	1.13				3.52	0.47
84.65	1.13				3.47	0.51
84.75	1.05	-0.14
84.85	0.59	-0.47	2.23	0.50	3.26	0.60
85.05	0.61	-0.23	2.61	0.80	3.14	0.52
85.25	0.53	-0.35	2.47	1.18	3.17	0.69
85.45	0.86	-0.42	2.46	0.71	3.01	0.33
85.65	0.82	-0.55
85.75	0.86	-0.52	2.27	0.41	3.24	0.31
86.15	0.73	-0.30	2.57	1.02	3.24	0.53
86.45	0.91	-0.21
86.65	0.82	-0.39			3.20	0.68
86.89	0.75	-0.51	2.77	0.87	3.22	0.35
87.15	0.90	-0.44	2.91	0.14	3.37	0.17
87.15	0.90		3.42	0.79
87.39	1.07	-0.33	3.03	0.91	3.69	0.70
87.55			3.33	1.09
87.65	1.12	-0.18	2.64	0.55	3.15	0.51
87.87	0.89	-0.06	2.64	1.33	3.61	0.61
88.15	0.77	-0.43	2.59	1.04	3.32	0.91
88.15	0.77				3.00	0.46
88.39	0.89	-0.29	2.83	1.10	3.45	0.95
88.85	0.92	0.16			3.41	0.73
88.85	0.92				3.79	0.81
89.25	0.91	-0.41	2.64	0.88	3.30	0.57
89.75	0.75	-0.47	2.61	1.21	3.36	0.49
89.75	0.75				3.29	0.35
90.25	0.94	-0.01	2.85	0.95	3.28	0.14
90.25	0.94	-0.54			3.25	0.57
90.75	0.79	-0.19	2.55	0.79	3.22	0.66
90.75	0.79				3.22	0.68
91.25	0.68	-0.35	2.50	0.76	2.81	-0.07
91.75	0.89	-0.75	2.82	0.65	3.47	-0.15
91.75	0.89		2.93	0.68
92.25	1.05	0.04
92.35	0.54	-0.20	2.25	1.05	2.83	0.57
92.75	0.76	-0.26	2.35	0.99
93.25	1.02	-0.45			2.80	0.10
93.28	0.99	-0.23	2.37	0.81	3.16	0.52
93.75	0.76	-0.71	2.84	0.77	3.32	0.00
94.28	1.05	-0.52
94.75	0.71	-0.32	2.23	0.32	3.14	0.34
94.75	0.71				3.23	0.38
94.85	0.87	-0.27	2.21	0.89	2.93	0.28
95.05	0.81	-0.20	2.48	1.07	3.06	0.55
95.25	0.73	-0.58			3.17	0.29
95.35	0.99	-0.18	3.12	0.93	3.26	0.24
96.25	0.92	-0.41			3.46	0.51
96.25	0.92				3.17	0.60
96.25	0.92				3.14	0.29
96.75	0.49	0.19	2.30	0.66	3.13	0.45
96.75	0.49	-0.22	2.48	0.94	3.23	0.56
98.75	0.73	-0.51	2.19	0.60	3.09	0.33
99.45	0.65	0.14	2.35	0.73	3.05	0.30
99.75	0.87	-0.51	2.32	0.54	2.82	0.41
99.89	0.65	0.44	2.48	1.07	3.20	0.53
100.25	0.58	-0.52	2.14	1.05
100.55	0.60	0.29			3.09	0.61
100.55	0.60	0.02
100.95	0.61	0.56	2.36	1.18	2.86	0.49
101.25	0.60	-0.12	1.88	0.63	2.61	0.41
101.55	1.03	0.32	2.46	1.01	2.89	0.65
101.75	0.64	-0.18	2.32	0.88	2.68	0.24
102.05	0.83	0.31	2.44	1.18	2.97	1.00
102.25	0.93	0.06	3.18	1.41
102.25	0.93	-0.01
102.25	0.93	-0.13
102.45	0.80	0.37	2.54	1.04	2.96	0.78
102.75	0.67	-0.20	2.22	0.83	3.02	0.50
103.05	0.80	0.49	2.40	1.08	2.86	0.50
103.25	0.90	0.00
103.35	1.06	0.20	2.65	0.51	2.86	0.38
103.35	1.06		2.46	0.88
103.55	1.01	-0.10	2.56	0.94	3.07	0.35
103.55	1.01	-0.54
103.67	1.01	0.24			3.12	0.64
103.75	0.95	-0.11	2.49	0.56	2.53	0.03
103.86	0.83	0.14	2.55	1.03	3.26	0.74
103.98	0.95	-0.01	2.70	0.69	3.15	0.44
104.05	0.82	-0.78	2.88	0.74
104.05	0.82	-0.99
104.15	1.10	0.14	3.05	0.79	3.63	0.19
104.25	1.09	-0.94	2.99	0.59	3.56	0.19
104.25	1.09		3.05	0.59	3.69	0.39
104.35	1.11	-0.15	3.11	0.91	3.67	0.16
104.35	1.11		2.89	0.76
104.47	0.81	-0.27			3.51	0.37
104.55	0.78	-0.67	2.86	0.61	3.52	0.40
104.66	0.95	0.13	2.83	0.84	3.53	0.32
104.66	0.95				3.57	0.17
104.75	0.67	-0.71	2.48	0.78	3.52	0.71
104.75	0.67				3.66	0.24
104.85	0.86	0.07	2.82	0.80	3.55	0.42
104.85	0.86	-0.44			3.46	0.37
104.95	0.67	-0.51	2.66	0.73	3.45	0.62
104.95	0.67				3.54	0.34
105.05			259.00	0.85	3.35	0.37
105.16	0.64	0.07	250.00	0.99	3.36	0.48
105.25	0.74	-0.50	2.99	0.98	3.31	0.55
105.37	0.84	0.07	2.61	0.79	3.17	0.46
105.45	0.99	-0.07			2.71	0.41
105.57	1.02	0.02			3.16	0.38
105.65	1.05	0.54			3.12	0.49
105.65	1.05				2.98	0.12
105.75	0.78	-0.32	2.18	0.52	2.76	0.21
105.75	0.78				3.06	0.33
105.84	0.71	0.09	2.54	0.78	3.26	0.44
105.98	0.59	-0.52	2.71	0.88	3.33	0.59
106.06	0.64	0.30	2.86	1.08	3.17	0.58
106.06	0.64		2.56	1.09
106.16	0.89	0.19	2.34	0.72	3.20	0.66
106.16	0.89		2.62	0.82
106.25	0.52	-0.16			3.06	0.39
106.75	0.46	-0.48	1.90	0.49	3.18	0.18
106.75	0.46	-0.69			3.21	0.21
107.05	0.55	-0.33
107.75	0.63	-0.11
108.25	0.73	-0.34	2.16	0.68	3.04	0.40
108.75	0.75	-0.57			3.08	0.55
109.25	0.56	-0.07	2.05	0.36	2.70	0.20
109.75	0.45	-0.45	2.18	0.71	2.86	0.39
110.25	0.45	-0.21	2.41	0.49
110.25	0.45		2.36	0.56
110.75	0.68	-0.33	2.14	0.80
111.25	0.43	0.00			2.91	0.36
111.25	0.43	-0.23
111.75	0.40	-0.11			3.07	0.56
112.25	0.67	0.02	2.61	1.09	2.68	0.11
112.75	0.58	-0.08			2.45	0.44
113.25	0.51	0.13
113.75					2.91	0.63
113.78	0.57	-0.07
113.78	0.57	-0.41
114.25	0.57	-0.31	2.30	0.97
114.75	0.64	0.10
115.25	0.90	0.36	2.11	0.81	2.59	0.34
115.75	0.72	-0.19			2.94	0.46
116.25	0.87	-0.15			3.21	0.60
116.75	0.57	0.05	2.37	1.17	2.86	0.43
117.75	0.91	-0.46	3.10	0.74
118.25	0.71	0.05			2.56	0.41
118.75	0.51	1.18	2.09	0.71
118.75	0.51	1.20
119.25	0.30	-0.07	2.46	0.78	2.87	0.44
119.25	0.30	-0.32
119.75					2.85	0.36
119.75					3.17	0.70
119.77	0.85	-0.19
120.25	0.48	0.08	2.38	0.89	3.21	0.19
120.25	0.48		2.79	0.88
120.75	0.48	-0.44	2.55	0.68	3.02	0.73
121.25	0.33	-0.19	2.37	1.20	2.74	0.44
121.75	0.48	-0.17	2.60	0.98	2.86	0.45
122.25	0.89	-0.05	2.65	0.86	3.15	0.53
122.75	0.88	0.04	2.30	1.10	2.79	0.40
122.75	0.88	-0.12
122.75	0.88	0.17
123.25	0.64	0.30	2.38	0.92	2.68	0.52
123.75	0.66	-0.09			2.63	0.22
124.25	0.94	-0.31			3.07	0.25
124.75			2.57	1.22	3.06	0.84
125.25	0.51	-0.08			2.59	0.64
125.75	0.46	-0.21	2.40	1.21	2.91	0.48
126.25	0.72	0.19	2.08	0.78	3.29	0.71
126.25	0.72				3.35	0.67
127.85	0.22	-0.66
128.45	0.85	-0.34	2.20	0.79	2.84	0.22
128.85	0.71	-0.05
128.85	0.71	-0.13
129.37	0.46	-0.32	1.57	0.81
129.37	0.46		1.57	0.81
129.95	0.81	-0.55	2.52	0.73	3.17	0.37
130.35	0.25	-0.78			2.97	0.53
131.45	0.27	-0.80			2.49	0.17
131.45	0.27	-1.34
131.85	0.46	-0.18	2.09	0.62	2.86	0.39
131.85	0.46	-0.59
132.35	0.66	0.39	2.29	0.90	2.83	0.36
132.95	0.40	-0.16			2.95	0.29
133.35	0.39	-0.13	2.11	0.93	2.67	0.33
133.85	0.41	-0.09			3.19	0.74
134.45	0.56	-0.21	2.29	0.82	2.99	0.46
134.45	0.56				3.26	0.75
134.85	0.79	-0.49	2.40	0.95	3.11	0.50
134.85	0.79				3.20	0.55
135.35	0.89	0.27	2.40	1.03	3.14	0.63
136.95	0.57	0.18
136.95	0.57	-0.21
137.45	0.69	-0.26
137.45	0.69	-0.46
137.95	0.44	-0.13	2.31	0.75	2.92	0.62
138.45	0.54	0.11	2.05	0.83	3.04	0.75
138.95	0.86	0.33			2.85	0.41
139.45	0.45	-0.35	2.28	0.94	2.87	0.48
139.95	0.93	0.20	2.49	0.87	3.17	0.84
139.95	0.93	-0.26
140.45	0.68	-0.46	2.70	1.22	2.66	0.38
140.95	0.87	-0.29	2.57	0.85	3.23	0.54
141.45	0.72	0.04	2.12	0.83	2.88	0.59
141.95	0.15	0.25	2.37	0.84	3.20	0.55
142.45	0.77	0.04	2.38	0.83	2.91	0.60
142.95	0.61	0.56	2.40	0.88
143.45	0.69	-0.42	2.62	0.89	3.14	0.47
143.45	0.69	-0.56
143.95	0.47	-0.17	1.54	0.65	2.61	0.72
143.95	0.47	-0.43
146.55	0.58	-0.13	2.28	0.94	2.55	0.28
147.05	0.70	-0.43			2.87	0.44
147.60	0.22	-0.11			2.73	0.58
148.05	0.41	-0.07			3.15	0.80
148.57	0.27	0.04			2.82	0.43
149.10	0.46	-0.25
149.55	0.95	0.36	2.64	0.97	3.01	0.47
150.05	0.31	0.36	2.37	0.92	2.65	0.57
150.05	0.31	0.33
150.60	0.39	-0.10	2.26	1.04	2.89	0.61
151.05	1.17	0.00	2.23	1.04	3.15	0.74
151.55					2.92	0.54
152.10	1.14	-0.14	2.06	0.80
152.55	0.60	-0.05	2.76	0.30
153.05	0.62	0.20
153.60	0.35	-0.53	2.33	0.78	2.86	0.33
154.05	0.83	-0.15
154.55	0.55	0.57
155.10	0.52	-0.06
156.15	0.80	-0.04
156.65	0.39	0.03
157.15	0.56	-0.40	1.95	0.59
157.65	0.59	0.21
158.17	0.43	-0.04
158.65	0.68	-0.58	2.40	0.75
159.15	0.70	-0.38
159.65	0.59	0.76
160.15	0.39	-0.48	2.04	0.68	2.96	0.45
160.65	1.07	0.22			3.39	0.68
161.15	0.75	0.40
161.65	0.51	-0.22
162.15	0.81	-0.11	2.52	1.07	2.68	0.26
162.65	0.53	-0.32	2.23	1.13
163.15	0.83	0.54			3.19	0.61
163.65	0.51	0.54
164.15	1.00	-0.02
164.65	0.29	-0.39