Citation:

PANGAEA.952659

Name: Radiogenic Nd isotope signatures of progressively leached dolostone grains from 4 sediment cores in the Labrador Sea
Published: 2022-12-19
License: https://creativecommons.org/licenses/by/4.0/
Keywords: AMOC; carbonate dissolution; dolostone; Heinrich Stadials; Labrador Sea; Late Quaternary; Neodymium isotopes

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Published: 2022-12-19 • DOI registered: 2023-02-07

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Abstract:

This dataset includes the results of the analysis of 4 marine sediment downcore records recovered from the Labrador Sea: core MD99-2227 (58° 12.38 N, 48° 22.22 W, 3460 m); core HU08-029-004 (61°27.49 N, 58°02.11 W, 2674 m); HU84-030-021 (58°22.06 N, 57°30.42 W, 2853 m); core HU91-045-094,(50°12.26 N, 45°41.14 W, 3448 m). Analysis includes measurement of the radiogenic Nd isotope signatures progressively leached dolostone grains, picked from wet-sieved < 63µm sediment fraction of marine sediment downcores. The downcore records were sampled with resolution of about 1 kyr and cover roughly the last 33 ka.

Keyword(s):

AMOC; carbonate dissolution; dolostone; Heinrich Stadials; Labrador Sea; Late Quaternary; Neodymium isotopes

Coverage:

Median Latitude: 57.060559 * Median Longitude: -52.401625 * South-bound Latitude: 50.200000 * West-bound Longitude: -58.036500 * North-bound Latitude: 61.463900 * East-bound Longitude: -45.690000

Date/Time Start: 1999-08-01T00:00:00 * Date/Time End: 1999-08-01T00:00:00

Minimum DEPTH, sediment/rock: 0.10 m * Maximum DEPTH, sediment/rock: 5.25 m

Event(s):

HU84/30-21PC (HU021) * Latitude: 58.367670 * Longitude: -57.507000 * Elevation: -2853.0 m * Method/Device: Core (CORE)

HU91/45-094 (HU094) * Latitude: 50.200000 * Longitude: -45.690000 * Elevation: -3541.0 m * Campaign: * Basis: Hudson * Method/Device: Core (CORE)

HUD2008/29-004 (PC04) * Latitude: 61.463900 * Longitude: -58.036500 * Elevation: -2674.0 m * Campaign: * Basis: Hudson * Method/Device: Core (CORE)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Filippova, Alexandra
2	Sample code/label	Sample label		Filippova, Alexandra
3	Name	Name		Filippova, Alexandra
4	DEPTH, sediment/rock	Depth sed	m	Filippova, Alexandra		Geocode
5	AGE	Age	ka BP	Filippova, Alexandra		Geocode
6	ε-Neodymium	ε-Nd		Filippova, Alexandra		SL-short leach (60 sec)
7	ε-Neodymium	ε-Nd		Filippova, Alexandra		LL- long leach (1 hour)
8	ε-Neodymium	ε-Nd		Filippova, Alexandra		NL- night leach (overnight)
9	ε-Neodymium	ε-Nd		Filippova, Alexandra		RD- totally dissolved residual dolostone
10	ε-Neodymium, standard deviation	ε-Nd std dev	±	Filippova, Alexandra	Calculated, 2 sigma

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

48 data points

Data

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

1 Event	2 Sample label	3 Name	4 Depth sed [m]	5 Age [ka BP]	6 ε-Nd (SL-short leach (60 sec))	7 ε-Nd (LL- long leach (1 hour))	8 ε-Nd (NL- night leach (overnight))	9 ε-Nd (RD- totally dissolved residua...)	10 ε-Nd std dev [±]
MD99-2227	MD99-2227	SGR	5.25	12.98				-19.70	0.3
HU91/45-094	HU91-045-094	OK	1.74	12.03	-10.05	-23.33	-23.68	-26.70	0.2
HU91/45-094	HU91-045-094	OK	1.29	9.00	-23.48	-25.53	-28.09	-29.58	0.2
HU84/30-21PC	HU84-030-021	WLS	1.00	7.38	-17.94	-16.25	-11.53	-22.87	0.3
HU84/30-21PC	HU84-030-021	WLS	2.42	12.93		-25.10	-26.72	-27.40	0.2
HUD2008/29-004	HU08-029-004	BIS	0.10	0.91	-16.20		-12.47		0.2
HUD2008/29-004	HU08-029-004	BIS	0.14	1.28	-16.14	-15.38		-24.42	0.2
HUD2008/29-004	HU08-029-004	BIS	1.89	11.65	-13.08	-12.30		-20.43	0.2