Citation:

PANGAEA.407617, Supplement to: Bonneau, M-C et al. (1980): Stable isotope fractionation and differential dissolution in recent planktonic foraminifera from Pacific box-cores. Oceanologica Acta, 3(3), 377-381

Name: Oxygen and carbon isotope ratios for six planktonic foraminifer species from different water depth, Ontong-Java Plateau, Pacific (Table 2)
Published: 1980
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Stable isotope analyses and scanning electron micrographs have been carried out on six planktonic forminifera species, Pulleniatina obliquiloculata, Globorotalia tumida, Sphaeroidinella dehiscens, Globigerinoides ruber, Globigerinoides sacculifer and Globigerinoides quadrilobatus from eleven box-cores taken at increasing depths in the equatorial Ontong-Java Plateau (Pacific). This allows us to describe the way dissolution affects the microstructures of the tests of the different species and to quantify the changes of isotopic composition. We may conclude that:

1) dissolution effects on test morphology and stable isotope compositions are species dependent, species with a similar habitat showing a similar trend;

2) the shallow water, thin-shelled species are the first to disappear: scanning electron microscope (SEM) work shows alteration of outer layers. Deep water, thick-shelled species are present in all samples: SEM work shows breakdown and disparition of inner layers;

3) for all species there is a similar trend towards increasing delta18O values with increasing water depths and increasing dissolution. This effect may be as high as 0.6 ‰ per thousand meters for Globorotalia tumida;

4) below the lysocline, around 3500 m, it appears that 13C/12C ratios slightly increase towards equilibrium values for thick shelled species: G. tumida, P. obliquiloculata and S. dehiscens.

14C dates and isotope stratigraphy of two box-cores show that all samples are recent in age, and exclude upward mixing of glacial deposits as an important factor.

Coverage:

Median Latitude: 0.353909 * Median Longitude: 160.056182 * South-bound Latitude: -2.225000 * West-bound Longitude: 155.868000 * North-bound Latitude: 2.785000 * East-bound Longitude: 163.707000

Date/Time Start: 1975-04-11T00:00:00 * Date/Time End: 1975-05-02T00:00:00

Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m

Event(s):

ERDC-079BX * Latitude: 2.785000 * Longitude: 156.230000 * Date/Time: 1975-04-11T00:00:00 * Elevation: -2766.0 m * Campaign: * Basis: Thomas Washington * Method/Device: Box corer (BC)

ERDC-088BX * Latitude: -0.048000 * Longitude: 155.868000 * Date/Time: 1975-04-18T00:00:00 * Elevation: -1924.0 m * Campaign: * Basis: Thomas Washington * Method/Device: Box corer (BC)

ERDC-092BX * Latitude: -2.225000 * Longitude: 156.998000 * Date/Time: 1975-04-19T00:00:00 * Elevation: -1598.0 m * Campaign: * Basis: Thomas Washington * Method/Device: Box corer (BC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Elevation of event	Elevation	m
5	DEPTH, sediment/rock	Depth sed	m			Geocode
6	Globorotalia tumida, δ18O	G. tumida δ18O	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
7	Globorotalia tumida, δ13C	G. tumida δ13C	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
8	Sphaeroidinella dehiscens, δ18O	S. dehiscens δ18O	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
9	Sphaeroidinella dehiscens, δ13C	S. dehiscens δ13C	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
10	Pulleniatina obliquiloculata, δ18O	P. obliquiloculata δ18O	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
11	Pulleniatina obliquiloculata, δ13C	P. obliquiloculata δ13C	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
12	Globigerinoides ruber, δ18O	G. ruber δ18O	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	250-315 µm
13	Globigerinoides ruber, δ13C	G. ruber δ13C	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	250-315 µm
14	Globigerinoides sacculifer, δ18O	G. sacculifer δ18O	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
15	Globigerinoides sacculifer, δ13C	G. sacculifer δ13C	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
16	Globigerinoides quadrilobatus, δ18O	G. quadril δ18O	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm
17	Globigerinoides quadrilobatus, δ13C	G. quadril δ13C	‰ PDB	Bonneau, M-C	Isotope ratio mass spectrometry	>400 µm

License:

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

Size:

92 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	6 G. tumida δ18O [‰ PDB]	7 G. tumida δ13C [‰ PDB]	8 S. dehiscens δ18O [‰ PDB]	9 S. dehiscens δ13C [‰ PDB]	10 P. obliquiloculata δ18O [‰ PDB]	11 P. obliquiloculata δ13C [‰ PDB]	12 G. ruber δ18O [‰ PDB]	13 G. ruber δ13C [‰ PDB]	14 G. sacculifer δ18O [‰ PDB]	15 G. sacculifer δ13C [‰ PDB]	16 G. quadril δ18O [‰ PDB]	17 G. quadril δ13C [‰ PDB]
ERDC-079BX	2.785	156.230	-2766	-0.35	1.60	-1.13	1.72	-1.01	1.29			-2.16	2.18	-1.95	1.69
ERDC-088BX	-0.048	155.868	-1924	-0.36	1.65	-1.38	1.89	-1.56	0.94	-2.27	1.25	-2.37	2.46	-2.97	1.19
ERDC-092BX	-2.225	156.998	-1598	-0.76	1.54	-1.09	1.77	-1.40	0.97	-2.53	1.06	-2.15	1.90	-2.26	1.77
ERDC-120BX	-0.017	158.693	-2247	-0.78	1.39	-1.45	1.67	-1.51	1.16	-2.28	1.28	-1.80	1.96	-2.75	1.26
ERDC-123BX	-0.022	160.415	-2946	-0.47	1.62	-1.19	1.57	-1.31	0.84			-2.02	2.17
ERDC-125BX	-0.003	160.998	-3368	-0.39	1.39	-1.23	1.56	-1.45	1.17			-1.88	1.15
ERDC-128BX	-0.005	161.427	-3732	0.19	1.74	-1.03	1.71	-1.20	1.26
ERDC-129BX	-0.007	161.975	-4169	-0.52	1.91	-1.09	1.62	-1.29	1.12
ERDC-131BX	-0.027	162.702	-4441	0.15	2.05	-0.85	1.72	-1.17	1.35
ERDC-136BX	1.100	161.605	-3848	0.06	1.73	-1.00	1.75	-0.96	0.63
ERDC-141BX	2.362	163.707	-4325	0.56	1.93	-1.13	1.53	-0.89	1.04