Citation:

PANGAEA.980080 (dataset in review)

Name: Diatom assemblages and biogenic silica from IODP Site 383-U1539
License: https://creativecommons.org/licenses/by/4.0/
Keywords: biogenic silica; Diatom assemblage; Southern Ocean

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Abstract:

From the complete downcore record of IODP Site 383-U1539, sampling was conducted at 1 m resolution. Quantitative diatom slides were prepared following the settling method of Warnock and Scherer (2015, doi:10.1016/j.csr.2015.04.012) using 15-25 μg of dry bulk sediment treated with 2 ml of 10 % hydrogen peroxide and two drops of saturated sodium hexametaphosphate. Sample solution was added to 2 L Elix water in B-KER2 chambers with prepared coverslips secured on a table above the height of the drainage valve. After settling and draining, coverslips were adhered to glass slides using Norland Optical Adhesive #61 (refractive index = 1.56). Slides were observed with a Leitz Dialux 20 light microscope, using a 100X oil immersion objective and 10X eyepieces for 1000X total magnification. A minimum of 400 valves were counted for each slide. Absolute diatom abundance and relative abundances of species are reported here.

Biogenic silica analysis was conducted at the University of Otago following a modified version of Mortlock and Froelich (1989, doi:10.1016/0198-0149(89)90092-7) for the same set of samples used for diatom analysis. For each analysis, approximately 7 mg of dry sediment was homogenized and dissolved in 0.1 M NaOH solution in an 85°C water bath. Sub-samples were collected after 3, 4, and 5 hours. Dissolved silicon content was measured using a Shimadzu UV-1800 spectrophotometer.

Keyword(s):

biogenic silica; Diatom assemblage; Southern Ocean

Supplement to:

Duffy, Meghan; Riesselman, Christina R (submitted): 1.4 Myr continuous record of productivity from the Pacific Sector of the Antarctic Circumpolar Current: Diatom and sediment geochemistry proxies from IODP 383 Site U1539. Paleoceanography and Paleoclimatology

Coverage:

Median Latitude: -56.151100 * Median Longitude: -115.133950 * South-bound Latitude: -56.151200 * West-bound Longitude: -115.134100 * North-bound Latitude: -56.151000 * East-bound Longitude: -115.133800

Date/Time Start: 2019-05-31T15:15:00 * Date/Time End: 2019-06-07T03:30:00

Minimum DEPTH, sediment/rock: 0.33 m * Maximum DEPTH, sediment/rock: 293.32 m

Event(s):

383-U1539A * Latitude: -56.151000 * Longitude: -115.134100 * Date/Time Start: 2019-05-31T15:15:00 * Date/Time End: 2019-06-02T05:25:00 * Elevation: -4071.1 m * Number of cores: 12 * Penetration: 107.6 m * Recovery: 97.35 % * Campaign: * Basis: Joides Resolution * Method/Device: Advanced piston corer

383-U1539B * Latitude: -56.151000 * Longitude: -115.133800 * Date/Time Start: 2019-06-02T05:25:00 * Date/Time End: 2019-06-03T13:00:00 * Elevation: -4081.3 m * Number of cores: 3 * Penetration: 28.2 m * Recovery: 77.73 % * Campaign: * Basis: Joides Resolution * Method/Device: Advanced piston corer

383-U1539C * Latitude: -56.151200 * Longitude: -115.133800 * Date/Time Start: 2019-06-03T13:00:00 * Date/Time End: 2019-06-05T15:30:00 * Elevation: -4081.0 m * Number of cores: 32 * Penetration: 268.1 m * Recovery: 92.32 % * Campaign: * Basis: Joides Resolution * Method/Device: Core drilling (CDRILL) * Comment: APC cores (N): 26, HLAPC cores (N): 6

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Duffy, Meghan
2	Latitude of event	Latitude		Duffy, Meghan
3	Longitude of event	Longitude		Duffy, Meghan
4	Date/Time of event	Date/Time		Duffy, Meghan
5	Sample code/label	Sample label		Duffy, Meghan	DSDP/ODP/IODP sample designation
6	Half	Half		Duffy, Meghan
7	DEPTH, sediment/rock	Depth sed	m	Duffy, Meghan	IODP Depth Scale Terminology	Geocode – CCSF-383-U1539-ABCD
8	Biogenic silica	bSiO2	%	Duffy, Meghan	Opal extraction according to Mortlock & Froelich, 1989	[wt %]
9	Diatoms, total, per unit sediment mass	TDA/sed	10⁶ #/g	Duffy, Meghan	Smear slide analysis
10	Actinocyclus actinochilus	A. actinochilus	%	Duffy, Meghan	Smear slide analysis
11	Actinocyclus curvatulus	A. curvatulus	%	Duffy, Meghan	Smear slide analysis
12	Actinocyclus ingens	A. ingens	%	Duffy, Meghan	Smear slide analysis
13	Actinoptychus spp.	Actinoptychus spp.	%	Duffy, Meghan	Smear slide analysis
14	Asteromphalus hookeri	A. hookeri	%	Duffy, Meghan	Smear slide analysis
15	Asteromphalus hyalinus	A. hyalinus	%	Duffy, Meghan	Smear slide analysis
16	Asteromphalus parvulus	A. parvulus	%	Duffy, Meghan	Smear slide analysis
17	Azpeitia tabularis	A. tabularis	%	Duffy, Meghan	Smear slide analysis
18	Cocconeis spp.	Cocconeis spp.	%	Duffy, Meghan	Smear slide analysis
19	Chaetoceros sp. (hyalochaete)	Chaetoceros sp. (hya)	%	Duffy, Meghan	Smear slide analysis	Vegetative spores
20	Chaetoceros sp. (hyalochaete)	Chaetoceros sp. (hya)	%	Duffy, Meghan	Smear slide analysis	Resting spores
21	Corethron pennatum	C. pennatum	%	Duffy, Meghan	Smear slide analysis
22	Coscinodiscus spp.	Coscinodiscus spp.	%	Duffy, Meghan	Smear slide analysis
23	Dactyliosolen antarcticus	D. antarcticus	%	Duffy, Meghan	Smear slide analysis
24	Eucampia antarctica var. recta, intercalary valves	E. antarctica var. recta intercal valv	%	Duffy, Meghan	Smear slide analysis
25	Eucampia antarctica var. recta, terminal valves	E. antarctica var. recta term valv	%	Duffy, Meghan	Smear slide analysis
26	Eucampia antarctica, intercalary valves	E. antarctica intercal valv	%	Duffy, Meghan	Smear slide analysis
27	Eucampia antarctica, terminal valves	E. antarctica term valv	%	Duffy, Meghan	Smear slide analysis
28	Fragilariopsis barronii	F. barronii	%	Duffy, Meghan	Smear slide analysis
29	Fragilariopsis bohatyi	F. bohatyi	%	Duffy, Meghan	Smear slide analysis
30	Fragilariopsis curta	F. curta	%	Duffy, Meghan	Smear slide analysis
31	Fragilariopsis cylindrus	F. cylindrus	%	Duffy, Meghan	Smear slide analysis
32	Fragilariopsis fossilis	F. fossilis	%	Duffy, Meghan	Smear slide analysis
33	Fragilariopsis kerguelensis	F. kerguelensis	%	Duffy, Meghan	Smear slide analysis
34	Fragilariopsis matuyamae	F. matuyamae	%	Duffy, Meghan	Smear slide analysis
35	Fragilariopsis obliquecostata	F. obliquecostata	%	Duffy, Meghan	Smear slide analysis
36	Fragilariopsis praeinterfrigidaria	F. praeinterfrigidaria	%	Duffy, Meghan	Smear slide analysis
37	Fragilariopsis pseudonana	F. pseudonana	%	Duffy, Meghan	Smear slide analysis
38	Fragilariopsis reinholdii	F. reinholdii	%	Duffy, Meghan	Smear slide analysis
39	Fragilariopsis rhombica	F. rhombica	%	Duffy, Meghan	Smear slide analysis
40	Fragilariopsis ritscheri	F. ritscheri	%	Duffy, Meghan	Smear slide analysis
41	Fragilariopsis robusta	F. robusta	%	Duffy, Meghan	Smear slide analysis
42	Fragilariopsis separanda	F. separanda	%	Duffy, Meghan	Smear slide analysis
43	Fragilariopsis sublinearis	F. sublinearis	%	Duffy, Meghan	Smear slide analysis
44	Fragilariopsis weaveri	F. weaveri	%	Duffy, Meghan	Smear slide analysis
45	Fragilariopsis spp.	Fragilariopsis spp.	%	Duffy, Meghan	Smear slide analysis
46	Fragilariopsis spp.	Fragilariopsis spp.	%	Duffy, Meghan	Smear slide analysis	Chain
47	Hemidiscus cuneiformis	H. cuneiformis	%	Duffy, Meghan	Smear slide analysis
48	Hemidiscus karstenii	H. karstenii	%	Duffy, Meghan	Smear slide analysis
49	Rhizosolenia antennata forma semispina	R. antennata f semispina	%	Duffy, Meghan	Smear slide analysis
50	Rhizosolenia polydactyla	R. polydactyla	%	Duffy, Meghan	Smear slide analysis
51	Rhizosolenia polydactyla forma squamosa	R. polydactyla f squamosa	%	Duffy, Meghan	Smear slide analysis
52	Rhizosolenia simplex	R. simplex	%	Duffy, Meghan	Smear slide analysis
53	Rhizosolenia spp.	Rhizosolenia spp.	%	Duffy, Meghan	Smear slide analysis
54	Rouxia antarctica	R. antarctica	%	Duffy, Meghan	Smear slide analysis
55	Rouxia constricta	R. constricta	%	Duffy, Meghan	Smear slide analysis
56	Rouxia leventerae	R. leventerae	%	Duffy, Meghan	Smear slide analysis
57	Shionodiscus gracilis var. expecta	R. leventerae var. expecta	%	Duffy, Meghan	Smear slide analysis
58	Shionodiscus gracilis var. gracilis	S. gracilis var. gracilis	%	Duffy, Meghan	Smear slide analysis
59	Shionodiscus oestrupii	S. oestrupii	%	Duffy, Meghan	Smear slide analysis
60	Shionodiscus tetraoestrupii	S. tetraoestrupii	%	Duffy, Meghan	Smear slide analysis
61	Stellarima stellaris	S. stellaris	%	Duffy, Meghan	Smear slide analysis
62	Thalassionema nitzschioides	T. nitzschioides	%	Duffy, Meghan	Smear slide analysis
63	Thalassionema nitzschioides var. parva	T. nitzschioides var. parva	%	Duffy, Meghan	Smear slide analysis
64	Thalassiosira antarctica T1	T. antarctica T1	%	Duffy, Meghan	Smear slide analysis	Cold
65	Thalassiosira antarctica T2	T. antarctica T2	%	Duffy, Meghan	Smear slide analysis	Warm
66	Thalassiosira elliptipora	T. elliptipora	%	Duffy, Meghan	Smear slide analysis
67	Thalassiosira fasciculata	T. fasciculata	%	Duffy, Meghan	Smear slide analysis
68	Thalassiosira kolbei	T. kolbei	%	Duffy, Meghan	Smear slide analysis
69	Thalassiosira lentiginosa	T. lentiginosa	%	Duffy, Meghan	Smear slide analysis
70	Thalassiosira lineata	T. lineata	%	Duffy, Meghan	Smear slide analysis
71	Thalassiosira oliverana	T. oliverana	%	Duffy, Meghan	Smear slide analysis
72	Thalassiosira torokina	T. torokina	%	Duffy, Meghan	Smear slide analysis
73	Thalassiosira trifulta	T. trifulta	%	Duffy, Meghan	Smear slide analysis
74	Thalassiosira tumida	T. tumida	%	Duffy, Meghan	Smear slide analysis
75	Thalassiosira vulnifica	T. vulnifica	%	Duffy, Meghan	Smear slide analysis
76	Thalassiosira spp.	Thalassiosira spp.	%	Duffy, Meghan	Smear slide analysis
77	Thalassiothrix antarctica	T. antarctica	%	Duffy, Meghan	Smear slide analysis
78	Trichotoxon reinboldii	T. reinboldii	%	Duffy, Meghan	Smear slide analysis
79	Diatoms, centrales indeterminata	Diatom cen indet	%	Duffy, Meghan	Smear slide analysis
80	Diatoms, pennales indeterminata	Diatom pen indet	%	Duffy, Meghan	Smear slide analysis

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

20401 data points

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Adolph, M-L; Dreßler, M; Troelstra, V et al. (2023): Biogenic silica of sediment core SAS19-6. https://doi.org/10.1594/PANGAEA.959643
Del Gaudio, AV; Avery, A; Auer, G et al. (2024): Planktonic foraminiferal assemblages of IODP Site U1576. https://doi.org/10.1594/PANGAEA.965703
Del Gaudio, AV; Avery, A; Auer, G et al. (2024): Planktonic foraminiferal assemblages of IODP Site U1575. https://doi.org/10.1594/PANGAEA.965686