Citation:

2003PA000937

Name: (Table 2) Mg/Ca and Sr/Ca composition of planktonic foraminifera from ODP Hole 143-865B
Published: 2003
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

To understand the climate dynamics of hypothesized past greenhouse intervals, it is essential to constrain tropical sea-surface temperatures (SST), yet existing proxy records give conflicting results. Here we present the first Mg/Ca-based study of pre-Quaternary SST and investigate early Paleogene (late Paleocene through late middle Eocene; 58.6-39.8 Ma) tropical temperatures, using planktonic foraminifera belonging to the genus Morozovella from Ocean Drilling Program Site 865 on Allison Guyot (western central equatorial Pacific Ocean). Calcification temperatures similar to or warmer than modern tropical SST are calculated using a range of assumptions regarding diagenesis, temperature calibration, and seawater Mg/Ca. Long-term warming is observed into the early Eocene (54.8-49.0 Ma), with peak SST between 51 and 48 Ma and rapid cooling of 4°C beginning at 48 Ma. These findings are inconsistent with the d18O-based SST previously estimated for this site.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: 18.440300 * Longitude: -179.555000

Date/Time Start: 1992-04-03T02:00:00 * Date/Time End: 1992-04-04T01:30:00

Minimum DEPTH, sediment/rock: 35.20 m * Maximum DEPTH, sediment/rock: 127.23 m

Event(s):

143-865B * Latitude: 18.440300 * Longitude: -179.555000 * Date/Time Start: 1992-04-03T02:00:00 * Date/Time End: 1992-04-04T01:30:00 * Elevation: -1527.0 m * Penetration: 165.5 m * Recovery: 123.66 m * Location: North Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 165.5 m cored; 0 m drilled; 74.7 % recovery

Comment:

Sediment depth is given in mbsf. Mg/Ca ratios have been adjusted using the average species offset from M. aragonensis. The offset is +0.16 mmol/mol for M. lehneri, -0.06 mmol/mol for M. spinulosa, -0.20 for M. subbotinae, and -0.08 for M. velazcoensis. bSr/Ca ratios have been adjusted using the average species offset from M. aragonensis. No offset is observed between M. spinulosa and M. aragonensis. The offset is +0.04 mmol/mol for M. lehneri, -0.03 for M. subbotinae, and -0.03 for M. velazcoensis. Samples without normalization calculation values have been excluded from discussion because of high Fe/Ca (>0.10 mmol/mol) and Fe/Mg (>0.02 mol/mol) ratios.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label		Tripati, Aradhna K	DSDP/ODP/IODP sample designation
2	DEPTH, sediment/rock	Depth sed	m			Geocode
3	AGE	Age	ka BP			Geocode
4	Morozovella aragonensis, Magnesium/Calcium ratio	M. aragonensis Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
5	Morozovella aragonensis, Magnesium/Calcium ratio	M. aragonensis Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
6	Morozovella aragonensis, Strontium/Calcium ratio	M. aragonensis Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
7	Morozovella aragonensis, Strontium/Calcium ratio	M. aragonensis Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
8	Morozovella lehneri, Magnesium/Calcium ratio	M. lehneri Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
9	Morozovella lehneri, Magnesium/Calcium ratio	M. lehneri Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
10	Morozovella lehneri, Strontium/Calcium ratio	M. lehneri Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
11	Morozovella lehneri, Strontium/Calcium ratio	M. lehneri Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
12	Morozovella spinulosa, Magnesium/Calcium ratio	M. spinulosa Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
13	Morozovella spinulosa, Magnesium/Calcium ratio	M. spinulosa Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
14	Morozovella spinulosa, Strontium/Calcium ratio	M. spinulosa Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
15	Morozovella spinulosa, Strontium/Calcium ratio	M. spinulosa Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
16	Morozovella subbotinae, Magnesium/Calcium ratio	M. subbotinae Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
17	Morozovella subbotinae, Magnesium/Calcium ratio	M. subbotinae Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
18	Morozovella subbotinae, Strontium/Calcium ratio	M. subbotinae Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
19	Morozovella subbotinae, Strontium/Calcium ratio	M. subbotinae Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
20	Morozovella velascoensis, Magnesium/Calcium ratio	M. velascoensis Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
21	Morozovella velascoensis, Magnesium/Calcium ratio	M. velascoensis Mg/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized
22	Morozovella velascoensis, Strontium/Calcium ratio	M. velascoensis Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry
23	Morozovella velascoensis, Strontium/Calcium ratio	M. velascoensis Sr/Ca	mmol/mol	Tripati, Aradhna K	ICP-OES, Inductively coupled plasma - optical emission spectrometry	normalized

License:

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

Size:

473 data points

Data

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

1 Sample label (DSDP/ODP/IODP sample designation)	2 Depth sed [m]	3 Age [ka BP]	4 M. aragonensis Mg/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	5 M. aragonensis Mg/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	6 M. aragonensis Sr/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	7 M. aragonensis Sr/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	8 M. lehneri Mg/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	9 M. lehneri Mg/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	10 M. lehneri Sr/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	11 M. lehneri Sr/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	12 M. spinulosa Mg/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	13 M. spinulosa Mg/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	14 M. spinulosa Sr/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	15 M. spinulosa Sr/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	16 M. subbotinae Mg/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	17 M. subbotinae Mg/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	18 M. subbotinae Sr/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	19 M. subbotinae Sr/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	20 M. velascoensis Mg/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	21 M. velascoensis Mg/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)	22 M. velascoensis Sr/Ca [mmol/mol] (ICP-OES, Inductively coupled ...)	23 M. velascoensis Sr/Ca [mmol/mol] (normalized, ICP-OES, Inductiv...)
143-865B-4H-6,20-22	35.20	39760					3.86	4.02	0.88	0.92	3.59	3.53	0.97	0.97
143-865B-4H-6,20-22	35.20	39760					4.39		1.00		3.79	3.73	0.93	0.93
143-865B-5H-2,70-72	39.20	40620					3.99	4.15	0.96	1.00
143-865B-5H-4,70-72	42.20	41270					4.17	4.33	0.96	1.00
143-865B-5H-5,70-72	43.70	41600					4.20	4.36	0.84	0.88	4.65	4.59	0.99	0.99
143-865B-5H-5,70-72	43.70	41600					4.27	4.43	1.00	1.04	4.57	4.51	0.87	0.87
143-865B-6H-1,81-83	47.31	42380					3.97	4.13	0.93	0.97	4.49	4.43	0.99	0.99
143-865B-6H-1,81-83	47.31	42380					4.08	4.24	0.93	0.97	4.99		0.98
143-865B-6H-4,70-72	51.70	42960	4.17	4.17	1.06	1.06					4.08	4.02	0.95	0.95
143-865B-7H-1,118-120	57.18	43690	3.68	3.68	1.04	1.04					3.94	3.88	1.05	1.05
143-865B-7H-1,118-120	57.18	43690	3.96	3.96	0.94	0.94
143-865B-7H-1,118-120	57.18	43690	3.70	3.70	0.97	0.97
143-865B-7H-4,66-68	61.18	44220	3.92	3.92	0.95	0.95					4.05	3.99	1.00	1.00
143-865B-7H-4,66-68	61.18	44220									3.94	3.88	1.00	1.00
143-865B-7H-4,66-68	61.18	44220									4.09	4.03	1.01	1.01
143-865B-7H-4,68-70	61.20	44220	3.74	3.74	1.02	1.02
143-865B-8H-1,89-91	66.39	44910									4.23	4.17	0.95	0.95
143-865B-8H-3,70-72	69.20	45650	3.77	3.77	1.08	1.08
143-865B-8H-4,67-69	70.67	46210	3.91	3.91	1.09	1.09
143-865B-8H-5,70-72	72.20	46790	3.88	3.88	1.07	1.07
143-865B-8H-5,70-72	72.20	46790	4.11	4.11	1.05	1.05
143-865B-8H-5,70-72	72.20	46790	3.80	3.80	1.07	1.07
143-865B-8H-5,70-72	72.20	46790	3.93	3.93	1.07	1.07
143-865B-8H-5,70-72	72.20	46790	3.81	3.81	1.08	1.08
143-865B-8H-6,70-72	73.70	47360	4.36	4.36	1.00	1.00
143-865B-9H-1,13-15	75.13	47900	5.05	5.05	0.99	0.99
143-865B-9H-2,20-22	76.70	48500	5.16	5.16	0.99	0.99
143-865B-9H-2,20-22	76.70	48500	4.88	4.88	1.03	1.03
143-865B-9H-2,20-22	76.70	48500	4.93	4.93	1.01	1.01
143-865B-9H-2,20-22	76.70	48500	5.12	5.12	0.99	0.99
143-865B-9H-3,20-22	78.20	49070	5.06	5.06	0.96	0.96
143-865B-9H-3,120-125	79.20	49460	4.99	4.99	0.96	0.96
143-865B-9H-4,10-12	79.60	49600	5.06	5.06	1.01	1.01
143-865B-9H-5,120-122	82.20	51160	5.27	5.27	0.95	0.95
143-865B-9H-5,120-122	82.20	51160	5.14	5.14	0.90	0.90
143-865B-9H-5,120-125	82.20	51160	5.21	5.21	0.91	0.91
143-865B-10H-1,83-85	85.33	51680	4.46	4.46	1.00	1.00
143-865B-10H-2,120-122	87.20	51990	4.55	4.55	0.98	0.98									4.64	4.44	0.99	0.96
143-865B-10H-2,120-122	87.20	51990	4.69	4.69	0.97	0.97
143-865B-10H-2,120-125	87.20	51990	4.39	4.39	0.98	0.98
143-865B-10H-3,4-6	87.54	52050	4.21	4.21	0.94	0.94									4.52	4.32	0.99	0.96
143-865B-10H-3,60-62	88.10	52140													5.05	4.85	0.96	0.93
143-865B-10H-4,60-62	89.60	52390													5.51		0.97		4.49	4.41	0.94	0.91
143-865B-10H-4,60-62	89.60	52390																	4.39	4.31	0.97	0.94
143-865B-10H-4,60-62	89.60	52390																	4.47	4.39	0.94	0.91
143-865B-10H-4,60-62	89.60	52390																	4.65	4.57	0.95	0.92
143-865B-10H-5,60-62	91.10	52740													4.60	4.40	0.96	0.93
143-865B-11H-2,20-22	95.70	53800													4.26	4.06	0.95	0.92	4.18	4.10	0.95	0.92
143-865B-11H-2,20-22	95.70	53800																	4.13	4.05	0.96	0.93
143-865B-11H-2,20-22	95.70	53800																	4.12	4.04	0.98	0.95
143-865B-11H-2,85-87	96.35	53950													4.23	4.03	0.98	0.95
143-865B-11H-5,85-87	100.85	54990													4.47	4.27	1.01	0.98	4.30	4.22	1.01	0.98
143-865B-11H-6,85-87	102.35	55270													4.38	4.18	1.01	0.98	4.22	4.14	1.01	0.98
143-865B-12H-1,0-2	103.50	55490																	4.34	4.26	0.99	0.96
143-865B-12H-1,10-12	103.60	55500																	4.97	4.89	1.01	0.98
143-865B-12H-1,10-12	103.60	55500																	4.35	4.27	0.98	0.95
143-865B-12H-1,10-12	103.60	55500																	4.29	4.21	1.01	0.98
143-865B-12H-1,20-22	103.70	55510																	4.02	3.94	0.98	0.95
143-865B-12H-1,40-42	103.90	55520																	4.02	3.94	0.99	0.96
143-865B-12H-1,70-72	104.20	55540													3.79	3.59	0.96	0.93	3.74	3.66	0.95	0.92
143-865B-12H-1,70-72	104.20	55540																	3.91	3.83	0.99	0.96
143-865B-12H-1,70-72	104.20	55540																	3.86	3.78	1.00	0.97
143-865B-12H-2,20-22	105.20	55600																	4.13	4.05	0.98	0.95
143-865B-12H-2,70-72	105.70	55630																	4.18	4.10	0.98	0.95
143-865B-12H-3,20-22	106.70	55690																	4.08	4.00	0.99	0.96
143-865B-12H-5,20-22	109.70	55870																	4.24	4.16	1.03	1.00
143-865B-12H-6,70-72	111.70	55990																	4.00	3.92	1.02	0.99
143-865B-13H-1,70-72	113.70	56110																	4.34	4.26	1.01	0.98
143-865B-13H-2,70-72	115.20	56200																	4.11	4.03	1.04	1.01
143-865B-13H-3,70-72	116.70	56360																	3.69	3.61	1.03	1.00
143-865B-13H-3,70-72	116.70	56360																	4.01	3.93	1.02	0.99
143-865B-13H-3,70-72	116.70	56360																	3.95	3.87	1.01	0.98
143-865B-13H-4,70-72	118.20	56650																	4.19	4.11	1.06	1.03
143-865B-13H-5,70-72	119.70	56940																	4.15	4.07	1.06	1.03
143-865B-13H-6,70-72	121.20	57230																	4.64	4.56	1.09	1.06
143-865B-13H-6,70-72	121.20	57230																	4.63	4.55	1.07	1.04
143-865B-13H-6,70-72	121.20	57230																	4.63	4.55	1.07	1.04
143-865B-14H-1,20-22	122.70	57530																	4.09	4.01	1.07	1.04
143-865B-14H-2,20-22	124.20	57820																	3.92	3.84	1.07	1.04
143-865B-14H-2,20-22	124.20	57820																	3.82	3.74	1.10	1.07
143-865B-14H-2,20-22	124.20	57820																	3.89	3.81	1.03	1.00
143-865B-14H-3,76-78	126.26	58290																	4.15	4.07	1.04	1.01
143-865B-14H-4,23-25	127.23	58600																	4.02	3.94	1.08	1.05