Citation:

PANGAEA.982959

Name: Bulk sediment U and Th isotope data, δ234U, authigenic Uranium (aU) and 230Thexs normalized vertical element fluxes of IODP Site U1537
Published: 2025-06-17
Keywords: authigenic uranium; Biogenic Barium (xsBa); bottom-water oxygenation; export productivity; opal; Scotia Sea; sediment; Southern Ocean; Th; thorium normalization; Weddell Sea

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Published: 2025-06-17 • DOI registered: 2025-10-30

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Abstract:

Isotopic measurements were conducted on a triple quadrupole ICP-MS (iCAP TQe ICP-MS ThermoFisher Scientific) coupled with an Apex IR (ESI) at the Institute of Earth Sciences, Heidelberg University. 232Th values are normalized to IAEA-385 certificate value based on standards in each digestion batch to correct subtle digestion deficiencies. The correction factor for each sample is provided by 'IAEA-385 correction factor for 232Th'. For more details consult the main manuscript. Authigenic Uranium was calculated under the assumption of a detrital factor of D = 0.5 +- 0.1. δ234U was calculated directly from measurements (δ234U) and based on the assumption of detrital and hydrogenic endmembers with an endmember mixing model (δ234U modeled). 230Th normalized vertical fluxes were calculated from the linked datasets for iron and Si/Al-derived opal..

Keyword(s):

authigenic uranium; Biogenic Barium (xsBa); bottom-water oxygenation; export productivity; opal; Scotia Sea; sediment; Southern Ocean; Th; thorium normalization; Weddell Sea

Project(s):

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

Coverage:

Latitude: -59.111000 * Longitude: -40.906000

Minimum Elevation: -3712.0 m * Maximum Elevation: -3712.0 m

Event(s):

382-U1537 * Latitude: -59.111000 * Longitude: -40.906000 * Elevation: -3712.0 m * Campaign: * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Depth, composite	Depth comp	mcd	Hallmaier, Moritz
2	AGE	Age	ka BP	Hallmaier, Moritz		Geocode
3	Thorium-230	230Th	dpm/g	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ
4	Standard deviation, relative	Std dev r	%	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ	2SD 230Th %
5	Thorium-232	232Th	dpm/g	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ
6	Standard deviation, relative	Std dev r	%	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ	2SD 232Th %
7	Uranium-234	234U	dpm/g	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ
8	Standard deviation, relative	Std dev r	%	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ	2SD 234U %
9	Uranium-238	238U	dpm/g	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ
10	Standard deviation, relative	Std dev r	%	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ	2SD 238U %
11	δ234 Uranium	δ234U	‰	Hallmaier, Moritz	Calculated
12	Standard deviation	Std dev	±	Hallmaier, Moritz	Calculated	2SD d234U
13	δ234 Uranium	δ234U	‰	Hallmaier, Moritz	Calculated	d234U modeled
14	Standard deviation	Std dev	±	Hallmaier, Moritz	Calculated	err_d234U modeled
15	Uranium, authigenic	U auth	dpm/g	Hallmaier, Moritz	Calculated
16	Standard deviation	Std dev	±	Hallmaier, Moritz	Calculated	2SD Th ex
17	Thorium-230 excess	230Th xs	dpm/g	Hallmaier, Moritz	Calculated	Th(ex,0) [dpm]
18	Standard deviation	Std dev	±	Hallmaier, Moritz	Calculated	2SD Th(ex,0)
19	Thorium-230 excess, decay-corrected	230Th xs,0	dpm/g	Hallmaier, Moritz	Calculated
20	Standard deviation	Std dev	±	Hallmaier, Moritz	Calculated	Th-normalized Mass flux
21	Accumulation rate, mass	MAR	g/cm²/ka	Hallmaier, Moritz	Calculated
22	Standard deviation	Std dev	±	Hallmaier, Moritz	Calculated	Th-normalized Mass flux
23	Iron, flux	Fe flux	g/cm²/ka	Hallmaier, Moritz	Calculated
24	Standard deviation	Std dev	±	Hallmaier, Moritz	Calculated	2SD Fe flux
25	Opal, flux	Opal flux	g/m²/ka	Hallmaier, Moritz	Calculated
26	Opal, flux, standard deviation	bSiO2 flux std dev	±	Hallmaier, Moritz	Calculated	2SD Opal flux
27	Correction factor	CF		Hallmaier, Moritz		IAEA-385 correction factor for 232Th
28	Uranium	U	µg/g	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ	bulk U con
29	Thorium	Th	µg/g	Hallmaier, Moritz	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ	bulk Th con

License:

Licensing unknown: Please contact principal investigator/authors to gain access and request licensing terms (UNKNOWN)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

4602 data points

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