Citation:

PANGAEA.986646

Name: Quantitative data on calcareous nannofossil assemblages between Marine Isotope Stage (MIS) 43 and late MIS 49 in the IODP Site 339-U1387, Gulf of Cadiz
Published: 2025-11-03
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Biomarkers; Calcareous nannofossils; Planktonic foraminifera

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Published: 2025-11-03 • DOI registered: 2025-11-03

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Abstract:

A high-resolution dataset is provided on marine and terrestrial biomarkers, alkenone-derived sea surface temperature (SST), and calcareous plankton key taxa in temporally well constrained, high resolution benthic and planktonic oxygen isotope records at Integrated Ocean Drilling Program site U1387 in the Gulf of Cadiz. The investigated time interval encompasses the Early Pleistocene marine isotope stages (MIS) late 49 to MIS 43. The aim is to evidence millennial climate variability during glacial phases of the "41 kyr world" and understand the impact of North Atlantic climate dynamics on the southern Portuguese margin. The age model was obtained by tuning the site U1387 Globigerina bulloides δ18O record (Voelker, 2025) to the high-resolution G. bulloides δ18O record of IODP site U1385 on its LR04-related chronology. Quantitative analyses on coccolithophore assemblages were performed at the Dipartimento di Scienze della Terra e Geoambientali, Bari University (Italy), using a polarized light microscope at 1000 X magnification, and abundances were determined by counting at least 500 coccoliths of all sizes. Abundances of taxa were expressed as percentage. Total coccolith abundances were expressed as n°/g of sediment. Reworked coccoliths or nannoliths plus lithics (>10 mm) have been counted separately during the analysis. Nannofossil dissolution index (DI) has been calculated as follows: small gephyrocapsids/(small gephyrocapsids + Calcidiscus leptoporus).

Keyword(s):

Biomarkers; Calcareous nannofossils; Planktonic foraminifera

Related to:

Trotta, Samanta; Duque-Castaño, Mónica; Rodrigues, Teresa; Voelker, Antje H L; Maiorano, Patrizia; Balestra, Barbara; Flores, José-Abel; Siniscalchi, Agata; Addante, Marina; Marino, Maria (2025): High-frequency glacial climate instability during the Early Pleistocene: Insights from IODP site U1387 (Gulf of Cadiz). Palaeogeography, Palaeoclimatology, Palaeoecology, 674, 113041, https://doi.org/10.1016/j.palaeo.2025.113041

References:

Voelker, Antje H L (2025): Planktonic and benthic foraminifera carbon and oxygen stable isotope records of IODP Site 339-U1387 (Gulf of Cadiz) for the interval of Marine Isotope Stage (MIS) 42 to MIS 46 (1.34-1.41 Ma) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.986643

Project(s):

Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)

Coverage:

Median Latitude: 36.805351 * Median Longitude: -7.718868 * South-bound Latitude: 36.805232 * West-bound Longitude: -7.719013 * North-bound Latitude: 36.805410 * East-bound Longitude: -7.718795

Minimum DEPTH, sediment/rock: 314.95 m * Maximum DEPTH, sediment/rock: 352.62 m

Event(s):

339-U1387A * Latitude: 36.805410 * Longitude: -7.719013 * Elevation: -558.7 m * Recovery: 347.84 m * Campaign: (Mediterranean Outflow) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 38 cores; 352.4 m cored; 99 % recovered; 352.4 m penetrated

339-U1387B * Latitude: 36.805410 * Longitude: -7.718797 * Elevation: -558.2 m * Recovery: 327.61 m * Campaign: (Mediterranean Outflow) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 36 cores; 338.3 m cored; 97 % recovered; 338.3 m penetrated

339-U1387C * Latitude: 36.805232 * Longitude: -7.718795 * Elevation: -558.4 m * Recovery: 409.5 m * Campaign: (Mediterranean Outflow) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 61 cores; 580 m cored; 71 % recovered; 870 m penetrated

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Sample code/label	Sample label		Trotta, Samanta	DSDP/ODP/IODP sample designation
3	DEPTH, sediment/rock	Depth sed	m	Trotta, Samanta	IODP Depth Scale Terminology	Geocode – mbsf, top of sampled interval
4	Depth, composite top	Depth comp top	mcd	Trotta, Samanta	IODP Depth Scale Terminology	top of sampled interval
5	Depth, composite, corrected, top	Depth comp corr top	c-mcd	Trotta, Samanta	IODP Depth Scale Terminology	related to Voelker et al. (2018)
6	AGE	Age	ka BP	Trotta, Samanta	Age model according to Lisiecki & Raymo (2005) [LR04]	Geocode
7	Coccolithus pelagicus ssp. pelagicus	C. pelagicus ssp. pelagicus	%	Trotta, Samanta	Quantitative analysis
8	Coccolithus spp.	Coccolithus spp.	%	Trotta, Samanta	Quantitative analysis
9	Helicosphaera spp.	Helicosphaera spp.	%	Trotta, Samanta	Quantitative analysis
10	Syracosphaera spp.	Syracosphaera spp.	%	Trotta, Samanta	Quantitative analysis
11	Rhabdosphaera spp.	Rhabdosphaera spp.	%	Trotta, Samanta	Quantitative analysis
12	Reticulofenestra spp.	Reticulofenestra spp.	%	Trotta, Samanta	Quantitative analysis
13	Gephyrocapsa caribbeanica	G. caribbeanica	%	Trotta, Samanta	Quantitative analysis
14	Calcidiscus spp.	Calcidiscus spp.	%	Trotta, Samanta	Quantitative analysis
15	Gephyrocapsa, large	Gephyrocapsa large	%	Trotta, Samanta	Quantitative analysis	>5.5 µm
16	Florisphaera profunda	F. profunda	%	Trotta, Samanta	Quantitative analysis
17	Gephyrocapsa, small	Gephyrocapsa small	%	Trotta, Samanta	Quantitative analysis	<3 µm
18	Gephyrocapsa oceanica	G. oceanica	%	Trotta, Samanta	Quantitative analysis	3-5.5 µm
19	Nannofossils, warm water taxa	Nannos warm	%	Trotta, Samanta	Quantitative analysis
20	Coccoliths, other	Cocco oth	%	Trotta, Samanta	Quantitative analysis
21	Dissolution index	DX		Trotta, Samanta	Quantitative analysis	nannofossil dissolution index
22	Coccoliths, reworked	Cocco rew	%	Trotta, Samanta	Quantitative analysis	reworked coccoliths plus lithics
23	Coccoliths, total	Cocco	10⁶ #/g	Trotta, Samanta	Quantitative analysis

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

6480 data points

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