Citation:

0016-7037(85)90296-0

Name: (Table 1) The oxygen isotope composition of Site DSDP 480 diatoms
Published: 1985
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The oxygen isotope composition of marine diatoms from hydraulic piston-cored samples of DSDP Site 480 vary widely, reflecting the great temperature variations and large isotopic changes of surface water in the Gulf of California. Nevertheless, the results can be correlated with standard oxygen isotope records for the late Quaternary based on carbonates (such as the record of core V19-29). The diatom-based results also parallel oxygen isotope data on benthic foraminifera from Site 480, thus confirming that signals of environmental changes have been retained in the diatom oxygen isotope record throughout the section. The data therefore allow us to assign an oxygen isotope stratigraphy and to define the chronology of Site 480.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Latitude: 27.901700 * Longitude: -111.655700

Date/Time Start: 1978-12-31T00:00:00 * Date/Time End: 1978-12-31T00:00:00

Minimum DEPTH, sediment/rock: 2.33 m * Maximum DEPTH, sediment/rock: 151.34 m

Event(s):

64-480 * Latitude: 27.901700 * Longitude: -111.655700 * Date/Time: 1978-12-31T00:00:00 * Elevation: -655.0 m * Penetration: 152.1 m * Recovery: 117.3 m * Location: North Pacific/Gulf of California/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 30 cores; 144 m cored; 4.8 m drilled; 81.5 % recovery

Comment:

The oxygen of all samples was extracted by the fluorine method (Taylor and Epstein, 1962; doi:10.1130/0016-7606(1962)73[461:RBORIC]2.0.CO;2). Oxygen isotope analyses were made with a 3-inch, 60° deflection, double-inlet, double-collector ratio mass spectrometer (Nier, 1947, doi:10.1063/1.1740961; McKinney et al., 1950, doi:10.1063/1.1745698) manufactured by Nuclide Corporation. All data are reported in the delta notation using Standard Mean Ocean Water (SMOW) as the reference standard. The reproducibility of the oxygen isotopic values was about ±0.2‰ (1 sigma) for frustules and about ±0.1‰ (1 sigma) for quartz standards when treated in the same set of six samples. For the internal diatom standard, the reproducibility of d18Osmow values with more than thirty measurements and over a period of two years was about ±0.2‰ (1 sigma).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Sample code/label	Sample label		Wang, Chung-Ho	DSDP/ODP/IODP sample designation
3	Water content, dry mass	Water dm	%	Wang, Chung-Ho		lost at 1000°C
4	δ18O	δ18O	‰	Wang, Chung-Ho		SMOW
5	δ18O, standard deviation	δ18O std dev	±	Wang, Chung-Ho
6	Comment	Comment		Wang, Chung-Ho
7	Texture	Texture		Wang, Chung-Ho
8	Diatom species	Diatom species		Wang, Chung-Ho		major analyzed

License:

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

Size:

403 data points

Data

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

1 Depth sed [m]	2 Sample label	3 Water dm [%]	4 δ18O [‰]	5 δ18O std dev [±]	6 Comment	7 Texture	8 Diatom species
2.33	480-1-2, 92-94	3.7	36.7		1 analysis	laminated	Coscinodiscus spp. Thalassiothrix sp., Pseudoeunotia sp.
3.61	480-1-3, 61-62	3.9	39.7	0.2	2 analyses	laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp., Pseudoeunotia sp.
7.07	480-2-2, 96-97	3.9	36.8	0.0	2 analyses	laminated	Coscinodiscus spp. Thalassiothrix sp., Pseudoeunotia sp., Actinoptychus sp.
8.57	480-2-3, 38-39	4.3	37.1	0.1	2 analyses	laminated	Coscinodiscus spp. Thalassiothrix sp., Actinoptychus sp.
11.82	480-3-2, 82-83	3.6	42.4	0.2	3 analyses	laminated	Coscinodiscus spp.
12.80	480-3-3, 30-31	3.7	37.7	0.3	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp., Pseudoeunotia sp., Thalassiothrix sp.
21.88	480-5-2, 137-139	3.7	42.4	0.3	2 analyses	non-laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp.
23.16	480-5-3, 115-117	3.6	41.6	0.2	2 analyses	non-laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp.
24.24	480-6-1, 49-50	3.6	37.0		1 analysis	non-laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp.
26.49	480-6-2, 124-125	4.2	43.1	0.3	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp.
28.03	480-6-3, 128-129	3.9	41.4	0.0	2 analyses	non-laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp.
29.03	480-7-1, 53-54	5.1	38.5	0.2	2 analyses	laminated	Coscinodiscus spp.
30.66	480-7-2, 65-67	3.7	39.3	0.2	2 analyses	non-laminated	Coscinodiscus spp., Actinoptychus sp.
32.07	480-7-3, 57-58	3.6	40.6	0.1	3 analyses	laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp.
33.48	480-8-1, 22-24	4.7	40.7	0.1	3 analyses	non-laminated	Thalassiothrix sp., Actinoptychus sp.
39.61	480-9-2, 10-12	3.9	40.5	0.2	2 analyses	non-laminated	Thalassiothrix sp., Coscinodiscus spp., Actinoptychus sp.
41.28	480-9-3, 27-29	3.6	38.8		1 analysis	non-laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp.
44.06	480-10-1, 131-132	4.4	37.0	0.1	2 analyses	laminated	Coscinodiscus spp., Pseudoeunotia sp., Thalassiothrix sp., Coscinodiscus spp.
45.53	480-10-2, 128-129	3.6	40.8	0.0	2 analyses	laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp.
46.93	480-10-3, 118-119	3.6	42.5		1 analysis	laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp.
48.56	480-11-1, 106-107	5.5	40.1		1 analysis	laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp.
64.63	480-13-2, 137-139	3.7	39.5	0.1	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp.
65.03	480-13-3, 27-29	3.7	40.6		1 analysis	laminated	Actinoptychus sp., Coscinodiscus spp.
73.65	480-15-2, 8-10	3.6	37.3	0.1	2 analyses	non-laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp.
76.21	480-16-1, 21-22	3.6	37.7	0.0	2 analyses	laminated	Coscinodiscus spp.
77.93	480-16-2, 43-44	3.5	42.4	0.2	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp.
79.37	480-16-3, 37-38	3.6	39.3	0.1	2 analyses	laminated	Coscinodiscus spp.
81.32	480-17-1, 57-58	3.6	39.8	0.1	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiosira sp.
83.47	480-17-2, 122-123	3.8	41.6	0.0	2 analyses	laminated	Thalassiothrix sp., Coscinodiscus spp., Thalassiosira sp.
84.66	480-17-3, 91-92	3.4	40.8		1 analysis	laminated	Coscinodiscus spp., Actinoptychus sp.
85.92	480-18-1, 42-43	3.5	39.1		1 analysis	laminated	Coscinodiscus spp., Thalassiosira sp.
87.40	480-18-2, 40-41	3.6	42.1	0.3	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp.
90.98	480-19-1, 72-74	5.5	39.7		1 analysis	laminated	Thalassiothrix sp., Coscinodiscus spp., Actinoptychus sp., Thalassiosira sp.
97.13	480-20-2, 63-64	3.8	41.4	0.2	3 analyses	laminated	Coscinodiscus spp., Actinoptychus sp.
98.24	480-20-3, 24-25	3.5	40.0		1 analysis	laminated	Coscinodiscus spp.
100.55	480-21-1, 80-81	6.7	41.2		1 analysis	laminated	Coscinodiscus spp.
101.95	480-21-2, 70-71	3.9	36.7		1 analysis	laminated	Coscinodiscus spp.
103.66	480-21-3, 91-92	3.7	39.7	0.2	3 analyses	laminated
105.51	480-22-1, 101-102	3.6	39.7		1 analysis	laminated	Coscinodiscus spp., Actinoptychus sp.
107.29	480-22-2, 129-130	4.1	41.2	0.0	3 analyses	laminated	Coscinodiscus spp.
108.58	480-22-1, 108-109	4.2	39.7	0.1	2 analyses	laminated
109.47	480-23-1, 22-23	3.4	36.5		1 analysis	non-laminated	Coscinodiscus spp.
110.89	480-21-2, 14-15	4.0	40.5		1 analysis	laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp.
113.10	480-23-3, 85-86	3.7	40.0		1 analysis	laminated
121.51	480-25-2, 126-127	4.4	39.9	0.0	2 analyses	laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp.
122.84	480-25-3, 109-110	3.9	40.7	0.2	2 analyses	laminated
124.72	480-26-1, 122-123	3.8	38.1		1 analysis	laminated	Coscinodiscus spp., Thalassiosira sp., Actinoptychus sp., Pseudoeunotia sp.
126.39	480-26-2, 139-140	3.8	39.8		1 analysis	laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp.
127.52	480-26-3, 102-104	3.9	37.0	0.1	2 analyses	non-laminated
128.52	480-27-1, 27-28	5.0	37.5	0.1	2 analyses	laminated	Coscinodiscus spp., Thalassiosira sp., Actinoptychus sp., Thalassiothrix sp.
130.44	480-27-2, 6B-70	3.7	39.1		1 analysis	laminated	Coscinodiscus spp., Thalassiothrix sp., Actinoptychus sp.
131.89	480-27-1, 64-65	1.6	38.7	0.2	2 analyses	laminated
133.78	480-28-1, 78-79	4.2	37.2	0.1	2 analyses	laminated	Thalassiothrix sp., Thalassiosira sp.
135.16	480-28-2, 66-67	3.9	39.3		1 analysis	laminated	Coscinodiscus spp., Thalassiothrix sp.
136.82	480-28-3, 82-83	3.6	38.3		1 analysis	laminated
138.02	480-29-1, 27-28	3.6	36.5	0.1	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp., Thalassiosira sp.
139.63	480-29-2, 38-39	3.5	41.6	0.2	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp., Thalassiothrix sp., Pseudoeunotia sp.
141.01	480-29-3, 26-27	3.5	40.4	0.1	2 analyses	laminated	Coscinodiscus spp.
143.72	480-30-1, 122-124	4.4	39.0	0.2	2 analyses	laminated	Coscinodiscus spp., Actinoptychus sp.
147.53	480-31-1, 28-29	3.6	36.5	0.2	2 analyses	laminated	Coscinodiscus spp., Thalassiothrix sp.
149.93	480-31-2, 118-119	3.9	40.3		1 analysis	laminated	Coscinodiscus spp., Thalassiothrix sp.
151.34	480-31-3, 109-110	4.0	38.8		1 analysis	laminated