Citation:

0091-7613(1996)024%3C0163:EOTITS%3E2.3.CO;2

Name: Calculation of paleoproductivity during the Eocene-Oligocene transition of ODP Site 113-689
Published: 1996
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

High-resolution records of carbon and oxygen isotopes and benthic foraminiferal accumulation rates for the Eocene-Oligocene section at Ocean Drilling Program Site 689 (Maud Rise, Weddell Sea; paleodepth about 1500 m) were used to infer variations in paleoproductivity in relation to changes in climate and ventilation of the deeper-water column. The benthic foraminiferal abundance and isotope records show short-term fluctuations at periodicities of 100 and 400 ka, implying orbitally driven climatic variations. Both records suggest that intermediate-depth water chemistry and primary productivity changed in response to climate. During the Eocene, productivity increased during cold periods and during cold-to-warm transitions, possibly as a result of increased upwelling of nutrient-rich waters. In the Oligocene, in contrast, productivity maxima occurred during intervals of low delta18O values (presumably warmer periods), when a proto–polar front moved to the south of the location of Site 689. This profound transition in climate-productivity patterns occurred around 37 Ma, coeval with rapid changes toward increasing variability of the oxygen and carbon isotope and benthic abundance records and toward larger-amplitude delta18O fluctuations. Therefore, we infer that, at this time, temperature fluctuations increased and a proto–polar front formed in conjunction with the first distinct pulsations in size of the Antarctic ice sheet. We speculate that this major change might have resulted from an initial opening of the Drake Passage at 37 Ma, at least for surface- and intermediate-water circulation.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: -64.517000 * Longitude: 3.100150

Date/Time Start: 1987-01-15T00:00:00 * Date/Time End: 1987-01-19T00:00:00

Minimum DEPTH, sediment/rock: 74.48 m * Maximum DEPTH, sediment/rock: 182.82 m

Event(s):

113-689 * Latitude: -64.517000 * Longitude: 3.100150 * Date/Time Start: 1987-01-15T00:00:00 * Date/Time End: 1987-01-19T00:00:00 * Elevation: -2091.0 m * Penetration: 470.5 m * Recovery: 375.3 m * Location: South Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 49 cores; 450.1 m cored; 0 m drilled; 83.4% recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Foraminifera, benthic	Foram benth	#/g	Diester-Haass, Lieselotte	Counting >150 µm fraction
3	Foraminifera, benthic, flux	Foram benth flux	#/cm²/ka	Diester-Haass, Lieselotte	Counting >150 µm fraction
4	Accumulation rate, mass	MAR	g/cm²/ka	Diester-Haass, Lieselotte	Calculated
5	Paleoproductivity as carbon	PP C	g/m²/a	Diester-Haass, Lieselotte	Calculated (Herguera and Berger, 1991)

License:

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

Size:

1748 data points

Data

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

1 Depth sed [m]	2 Foram benth [#/g]	3 Foram benth flux [#/cm²/ka]	4 MAR [g/cm²/ka]	5 PP C [g/m²/a]
74.48	292	234	0.80	99
74.69	207	165	0.80	82
74.88	161	129	0.80	71
75.09	198	158	0.80	80
75.23	330	264	0.80	107
75.44	548	439	0.80	143
75.64	473	378	0.80	131
76.03	454	363	0.80	128
76.19	264	211	0.80	94
76.43	193	155	0.80	79
76.63	269	215	0.80	95
76.81	230	184	0.80	87
76.96	197	157	0.80	79
77.13	181	145	0.80	76
77.53	138	118	0.86	68
77.75	125	108	0.86	64
78.11	127	109	0.86	65
78.36	175	151	0.86	77
78.54	128	110	0.86	65
79.04	437	376	0.86	131
79.23	188	161	0.86	81
79.43	158	136	0.86	73
79.63	261	224	0.86	97
79.82	389	319	0.82	119
80.03	806	661	0.82	182
80.53	255	209	0.82	93
81.70	477	391	0.82	134
81.88	540	443	0.82	144
82.10	385	315	0.82	118
82.23	344	282	0.82	111
82.63	624	511	0.82	157
82.83	334	274	0.82	109
83.04	305	250	0.82	103
83.23	269	220	0.82	96
83.48	329	270	0.82	108
83.64	482	395	0.82	135
84.13	165	125	0.76	70
84.44	123	93	0.76	60
84.54	86	65	0.76	50
84.70	226	172	0.76	83
84.88	172	130	0.76	72
85.10	128	97	0.76	61
85.23	81	62	0.76	48
85.63	56	43	0.76	41
85.83	127	96	0.76	61
86.04	142	108	0.76	64
86.23	61	46	0.76	42
86.39	129	98	0.76	61
86.64	152	116	0.76	67
87.13	125	95	0.76	60
87.37	108	82	0.76	56
87.53	237	180	0.76	86
87.70	297	226	0.76	98
87.89	308	234	0.76	100
88.14	503	382	0.76	132
88.25	140	106	0.76	64
88.64	127	96	0.76	61
88.83	77	58	0.76	47
89.03	80	61	0.76	48
89.23	111	84	0.76	56
89.43	73	55	0.76	46
89.64	63	48	0.76	43
90.08	276	210	0.76	93
90.33	386	301	0.78	115
91.38	628	490	0.78	153
91.59	363	327	0.90	121
91.77	688	619	0.90	175
92.21	226	203	0.90	92
92.38	191	172	0.90	84
92.60	251	226	0.90	98
92.78	61	55	0.90	45
92.99	113	102	0.90	63
93.21	223	201	0.90	91
93.32	162	163	0.90	81
93.74	80	72	0.90	52
93.93	220	198	0.90	90
94.14	161	145	0.90	76
94.34	173	156	0.90	79
94.52	76	68	0.90	51
94.76	103	93	0.90	59
95.20	92	83	0.90	56
95.38	44	39	0.90	39
95.59	116	105	0.90	63
95.82	66	59	0.90	47
95.99	99	89	0.90	58
96.14	207	187	0.90	87
96.33	430	387	0.90	133
96.74	121	109	0.90	65
96.96	160	144	0.90	76
97.14	215	193	0.90	89
97.34	509	458	0.90	147
97.56	734	661	0.90	182
97.77	674	607	0.90	173
98.25	188	169	0.90	83
98.45	160	144	0.90	75
98.64	318	286	0.90	112
98.84	174	157	0.90	79
101.02	560	504	0.90	155
101.22	97	87	0.90	57
101.34	188	169	0.90	83
101.54	223	201	0.90	91
101.95	409	393	0.96	134
102.13	342	328	0.96	121
102.34	347	334	0.96	122
102.54	198	190	0.96	88
102.74	308	296	0.96	114
102.94	552	530	0.96	160
103.45	643	302	0.47	115
103.63	606	285	0.47	111
103.84	704	331	0.47	122
104.04	684	321	0.47	119
104.21	868	408	0.47	137
104.35	878	413	0.47	138
104.57	344	162	0.47	81
104.96	517	233	0.45	99
105.14	458	206	0.45	93
105.35	406	183	0.45	86
105.54	308	139	0.45	74
105.74	690	311	0.45	117
105.94	276	124	0.45	70
106.04	378	170	0.45	83
106.39	246	111	0.45	65
106.59	439	197	0.45	90
107.02	380	190	0.50	88
107.19	709	355	0.50	127
107.34	645	368	0.57	129
107.54	689	393	0.57	134
107.94	549	313	0.57	118
108.14	293	167	0.57	82
108.36	371	211	0.57	94
108.54	307	175	0.57	84
108.74	551	314	0.57	118
108.94	611	348	0.57	125
109.44	656	374	0.57	130
109.64	610	348	0.57	125
109.86	620	353	0.57	126
110.04	891	508	0.57	156
110.27	732	417	0.57	139
110.45	354	202	0.57	91
110.63	454	259	0.57	105
110.79	631	360	0.57	128
110.93	421	240	0.57	101
111.14	250	142	0.57	75
111.54	421	177	0.43	85
111.74	613	264	0.43	107
111.97	710	305	0.43	116
112.14	446	192	0.43	89
112.31	528	227	0.43	98
112.55	735	316	0.43	118
113.04	388	167	0.43	82
113.27	699	300	0.43	115
113.44	844	363	0.43	128
113.64	838	361	0.43	128
113.82	470	202	0.43	92
114.05	307	132	0.43	72
114.53	284	148	0.52	77
114.77	359	187	0.52	87
114.94	251	131	0.52	72
115.14	182	94	0.52	60
115.29	478	248	0.52	103
115.54	172	89	0.52	58
115.65	379	197	0.52	90
116.04	201	104	0.52	63
116.28	231	120	0.52	68
116.44	379	197	0.52	90
116.62	303	157	0.52	79
116.79	151	104	0.69	63
116.93	341	235	0.69	100
117.16	112	77	0.69	54
117.52	217	154	0.71	78
117.70	249	177	0.71	85
117.94	181	129	0.71	71
118.14	510	362	0.71	128
118.31	470	333	0.71	122
118.54	450	320	0.71	119
119.00	500	355	0.71	127
119.20	346	246	0.71	102
119.44	268	190	0.71	88
119.64	1864	1324	0.71	281
119.81	1410	1100	0.78	249
119.98	998	778	0.78	201
120.22	1167	934	0.78	225
120.40	315	245	0.78	102
120.61	720	561	0.78	165
120.74	811	633	0.78	178
121.12	1808	1410	0.78	293
121.36	827	645	0.78	180
121.57	453	353	0.78	126
121.74	262	204	0.78	92
121.91	274	213	0.78	94
122.10	236	184	0.78	87
122.30	221	173	0.78	84
122.65	506	379	0.75	132
122.86	466	350	0.75	125
123.07	498	373	0.75	130
123.24	463	347	0.75	125
123.40	444	333	0.75	122
123.62	427	320	0.75	119
124.15	453	340	0.75	123
124.38	434	326	0.75	120
124.57	305	228	0.75	98
124.74	216	162	0.75	81
124.90	199	149	0.75	77
125.07	306	230	0.75	98
125.15	434	326	0.75	120
125.57	213	153	0.72	78
125.66	265	191	0.72	89
125.88	284	205	0.72	92
126.07	350	252	0.72	104
126.24	364	262	0.72	106
126.39	348	250	0.72	103
126.59	241	174	0.72	84
126.79	461	332	0.72	122
127.14	146	105	0.72	63
127.32	222	160	0.72	80
127.74	187	134	0.72	73
127.89	163	117	0.72	67
128.12	113	81	0.72	55
128.29	86	62	0.72	48
128.64	208	150	0.72	77
128.83	235	192	0.82	89
129.07	138	114	0.82	66
129.24	288	236	0.82	100
129.43	345	283	0.82	111
129.64	149	122	0.82	69
129.90	270	222	0.82	96
130.08	213	175	0.82	84
130.19	195	160	0.82	80
130.34	179	147	0.82	76
130.85	142	117	0.82	67
131.05	167	137	0.82	73
131.26	180	148	0.82	77
131.41	161	132	0.82	72
131.71	216	177	0.82	85
131.87	190	156	0.82	79
132.34	235	165	0.70	81
132.53	141	99	0.70	61
132.75	136	95	0.70	60
132.94	305	214	0.70	94
133.18	389	272	0.70	109
133.34	628	440	0.70	143
133.79	1841	1288	0.70	276
133.97	1384	969	0.70	230
134.25	283	198	0.70	91
134.41	343	240	0.70	101
134.59	260	182	0.70	86
134.83	315	221	0.70	96
134.95	237	166	0.70	82
135.35	411	287	0.70	112
135.56	355	248	0.70	103
135.91	267	293	1.10	113
136.09	375	412	1.10	138
136.29	203	224	1.10	97
136.46	209	230	1.10	98
136.85	197	217	1.10	95
137.05	178	196	1.10	90
137.26	175	192	1.10	89
137.41	163	180	1.10	86
137.59	190	210	1.10	93
137.79	223	246	1.10	102
137.95	140	154	1.10	79
138.35	144	158	1.10	80
138.55	99	113	1.14	66
138.76	90	103	1.14	63
138.91	77	88	1.14	58
139.17	124	142	1.14	75
139.35	45	52	1.14	44
139.51	88	101	1.14	62
139.74	525	599	1.14	172
139.79	142	162	1.14	81
139.94	120	137	1.14	73
140.33	154	175	1.14	84
140.55	143	163	1.14	81
140.77	109	125	1.14	70
140.94	165	188	1.14	88
141.12	134	153	1.14	78
141.35	78	89	1.14	58
141.78	78	81	1.04	55
142.00	52	54	1.04	45
142.19	59	61	1.04	48
142.41	49	51	1.04	44
142.59	96	100	1.04	62
142.80	60	63	1.04	49
142.93	118	195	1.04	90
143.33	83	87	1.04	57
143.53	63	65	1.04	50
143.75	79	82	1.04	56
143.90	130	135	1.04	73
144.12	131	136	1.04	73
144.35	117	122	1.04	69
144.83	124	133	1.07	72
145.03	89	95	1.07	60
145.25	86	54	0.63	45
145.44	122	77	0.63	54
145.62	74	47	0.63	42
145.85	87	55	0.63	45
146.34	68	43	0.63	41
146.53	106	67	0.63	50
146.75	85	53	0.63	45
146.91	65	41	0.63	40
147.09	86	54	0.63	45
147.34	39	24	0.63	32
147.45	48	30	0.63	35
147.84	41	25	0.61	33
148.03	44	27	0.61	33
148.25	38	23	0.61	32
148.44	38	23	0.61	32
148.62	70	43	0.61	40
148.85	253	155	0.61	79
148.97	264	161	0.61	80
149.11	81	50	0.61	43
149.29	102	62	0.61	48
149.49	108	66	0.61	50
149.64	107	65	0.61	50
150.06	116	71	0.61	52
150.25	182	111	0.61	65
150.48	250	152	0.61	78
150.64	119	121	0.61	69
150.85	123	75	0.61	53
151.05	91	56	0.61	46
151.56	224	157	0.70	79
151.74	282	197	0.70	90
151.97	317	222	0.70	97
152.14	228	159	0.70	80
152.35	195	136	0.70	73
152.55	130	91	0.70	59
153.06	83	34	0.41	37
153.24	64	26	0.41	33
153.47	89	36	0.41	38
153.64	83	34	0.41	37
153.85	120	49	0.41	43
154.05	110	45	0.41	41
154.56	111	44	0.40	41
154.97	106	42	0.40	40
155.14	180	72	0.40	52
155.35	231	92	0.40	59
155.54	286	115	0.40	67
156.05	53	21	0.40	31
156.24	58	23	0.40	32
156.47	42	17	0.40	29
156.64	119	48	0.40	43
156.85	172	69	0.40	51
157.05	84	33	0.40	36
157.55	119	48	0.40	43
157.74	158	63	0.40	49
157.96	239	96	0.40	60
158.14	323	129	0.40	71
158.34	280	112	0.40	66
158.56	266	101	0.38	62
158.74	697	265	0.38	107
158.82	48	18	0.38	29
158.99	72	27	0.38	34
159.19	82	31	0.38	36
159.34	46	17	0.38	29
159.74	62	23	0.38	32
159.94	84	32	0.38	36
160.14	149	57	0.38	46
160.34	419	159	0.38	80
160.54	447	170	0.38	83
160.74	362	137	0.38	74
161.22	511	194	0.38	89
161.45	273	104	0.38	63
161.64	381	145	0.38	76
161.84	453	172	0.38	84
162.04	332	126	0.38	70
162.24	321	122	0.38	69
162.74	260	96	0.37	61
162.95	97	36	0.37	38
163.14	116	43	0.37	41
163.34	553	166	0.30	82
163.54	1970	591	0.30	171
163.74	1785	536	0.30	161
164.84	783	235	0.30	100
164.98	425	127	0.30	71
165.19	312	94	0.30	60
165.33	354	106	0.30	64
165.74	537	408	0.76	137
165.95	583	426	0.73	141
166.15	632	462	0.73	147
166.34	1048	765	0.73	199
166.54	394	288	0.73	112
166.74	326	238	0.73	100
168.54	232	170	0.73	83
168.70	269	124	0.73	69
168.95	230	95	0.73	60
169.45	179	136	0.76	73
169.65	182	138	0.76	74
169.84	181	137	0.76	74
170.04	175	133	0.76	72
170.20	172	131	0.76	72
170.45	292	222	0.76	96
170.95	281	213	0.76	94
171.15	427	325	0.76	120
171.34	360	274	0.76	109
171.54	349	265	0.76	107
171.70	852	647	0.76	180
171.95	642	488	0.76	152
172.45	186	145	0.78	76
172.65	195	152	0.78	78
172.84	121	95	0.78	60
173.04	135	106	0.78	64
173.20	302	236	0.78	100
173.45	243	189	0.78	88
173.95	176	137	0.78	74
174.15	100	78	0.78	54
174.34	112	87	0.78	58
174.54	78	61	0.78	48
174.70	60	47	0.78	42
174.95	66	52	0.78	44
175.45	153	121	0.79	69
175.65	92	73	0.79	52
175.84	125	99	0.79	61
176.04	264	208	0.79	93
176.20	601	474	0.79	150
176.45	102	80	0.79	55
176.94	113	89	0.79	58
178.11	107	84	0.79	56
178.29	77	60	0.79	48
178.49	75	64	0.85	49
178.64	91	78	0.85	54
179.04	67	57	0.85	46
179.24	38	32	0.85	36
179.44	53	45	0.85	41
179.64	56	47	0.85	42
179.82	51	43	0.85	41
180.06	66	56	0.85	46
180.54	199	169	0.85	83
180.74	85	72	0.85	52
180.94	90	76	0.85	54
181.14	96	82	0.85	56
181.32	110	94	0.85	60
181.56	283	241	0.85	101
182.04	131	103	0.79	63
182.25	83	66	0.79	50
182.45	98	78	0.79	54
182.64	114	90	0.79	59
182.82	160	126	0.79	70