Citation:

PANGAEA.950199

Name: Heavy mineral study of the glacigenic deposits from the East Siberian continental margin collected during the SWERUS-C3 expedition
Creator: Raisa Alatarvas
Published: 2022-11-03
License: https://creativecommons.org/licenses/by/4.0/
Keywords: De Long Trough; East Siberian Sea; glacigenic sediments; heavy minerals; marine geology

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Abstract:

The heavy mineral signature of glacigenic deposits from the East Siberian continental margin were studied and the data presented are from samples from cores acquired on Leg 2 of the SWERUS-C3 2014 Expedition on IB Oden, which departed 21 August from Barrow, Alaska, and ended 3 October in Tromsø, Norway. Four sediment cores presented were collected using either a piston (PC) or gravity (GC) corer, both rigged with a 1360 kg core head. The unsplit sediment cores logged shipboard on a Multi-Sensor Core Logger (MSCL). A total of 17 samples were analysed. Two samples are from the 0.83 m long core 20-GC1, which was recovered in 115 m water depth from the East Siberian shelf. Two diamict samples are from the 4.06 m long core 23-GC1, which was recovered in water depth of 508 m, and nine samples are from 4.05 m long core 24-GC1 recovered in water depth of 964 m from the De Long Trough. The samples from core 24-GC1 also include surface sediments and other lithologies found between the seafloor and the diamict. Four samples are from core 29-GC1. The 4.66 m long core was recovered in 824 m water depth from the southern Lomonosov Ridge. The heavy mineral grains >63 μm from 17 samples were analysed with Zeiss Ultra Plus Scanning Electron Microscope (SEM) at the Centre for Material Analysis, University of Oulu in 2019. Heavy mineral identification was done by using MinIdent-Win 3.0 computer program. The 18 analysed elements Na, Mg, Al, Si, P, S, K, Ca, Ti, V, Cr, Fe, Cu, Zn, Zr, La, Ce, and Nd (expressed as oxides) were used in the specification of the minerals.

Keyword(s):

De Long Trough; East Siberian Sea; glacigenic sediments; heavy minerals; marine geology

Related to:

Alatarvas, Raisa; O'Regan, Matt; Strand, Kari O (2022): Heavy mineral assemblages of the De Long Trough and southern Lomonosov Ridge glacigenic deposits: implications for the East Siberian Ice Sheet extent. Climate of the Past, 18(8), 1867-1881, https://doi.org/10.5194/cp-18-1867-2022

Coverage:

Median Latitude: 79.028750 * Median Longitude: 158.799175 * South-bound Latitude: 77.358300 * West-bound Longitude: 141.781700 * North-bound Latitude: 81.298300 * East-bound Longitude: 165.366700

Minimum DEPTH, sediment/rock: 0.04 m * Maximum DEPTH, sediment/rock: 4.62 m

Event(s):

SWERUS-C3_20-GC1 * Latitude: 77.358300 * Longitude: 163.033300 * Elevation: -115.0 m * Location: East Siberian Shelf * Campaign: (77DN20140705) * Basis: Oden * Method/Device: Gravity corer (GC) * Comment: Core length: 0.83 m

SWERUS-C3_23-GC1 * Latitude: 78.661700 * Longitude: 165.015000 * Elevation: -508.0 m * Location: De Long Trough, East Siberian margin * Campaign: (77DN20140705) * Basis: Oden * Method/Device: Gravity corer (GC) * Comment: Core length: 4.06 m

SWERUS-C3_24-GC1 * Latitude: 78.796700 * Longitude: 165.366700 * Elevation: -964.0 m * Location: De Long Trough, East Siberian margin * Campaign: (77DN20140705) * Basis: Oden * Method/Device: Gravity corer (GC) * Comment: Core length: 4.05 m

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Alatarvas, Raisa
2	Location of event	Location		Alatarvas, Raisa
3	Latitude of event	Latitude		Alatarvas, Raisa
4	Longitude of event	Longitude		Alatarvas, Raisa
5	Elevation of event	Elevation	m	Alatarvas, Raisa
6	Sample ID	Sample ID		Alatarvas, Raisa
7	Core	Core		Alatarvas, Raisa
8	Section	Sect		Alatarvas, Raisa
9	Section Top in meters below surface	Top	mbsf	Alatarvas, Raisa
10	Section Bot in meters below surface	Bot	mbsf	Alatarvas, Raisa
11	DEPTH, sediment/rock	Depth sed	m	Alatarvas, Raisa		Geocode – mbsf
12	Description	Description		Alatarvas, Raisa	Visual description	Core description
13	Amphibole, grains	Amp grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
14	Pyroxene, grains	Pyrox grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
15	Epidote, grains	Ep grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
16	Garnet, grains	Grt grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
17	Mica, grains	Mica grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
18	Titanite, grains	Ttn grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
19	Zircon, grains	Zr grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
20	Iron oxide, grains	FeOX grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
21	Ilmenite, grains	Ilm grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
22	Oxides grains, other	Oxides grains oth	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
23	Phosphates, grains	Phosphates grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
24	Sulfides, grains	Sulfides grains	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)
25	Heavy mineral grains, other	HM grain oth	#	Alatarvas, Raisa	Scanning electron microscope (SEM)	Means pieces (pcs.)

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

323 data points

Data

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

1 Event	2 Location	3 Latitude	4 Longitude	5 Elevation [m]	6 Sample ID	7 Core	8 Sect	9 Top [mbsf]	10 Bot [mbsf]	11 Depth sed [m]	12 Description	13 Amp grains [#]	14 Pyrox grains [#]	15 Ep grains [#]	16 Grt grains [#]	17 Mica grains [#]	18 Ttn grains [#]	19 Zr grains [#]	20 FeOX grains [#]	21 Ilm grains [#]	22 Oxides grains oth [#]	23 Phosphates grains [#]	24 Sulfides grains [#]	25 HM grain oth [#]
SWERUS-C3_20-GC1	East Siberian Shelf	77.3583	163.0333	-115	1	20–GC1	CC	0.22	0.24	0.76	grey diamict	78	31	13	6	0	15	8	2	14	6	6	0	5
SWERUS-C3_20-GC1	East Siberian Shelf	77.3583	163.0333	-115	2	20–GC1	CC	0.27	0.29	0.81	grey diamict	41	27	20	25	0	17	4	8	14	13	12	0	2
SWERUS-C3_23-GC1	De Long Trough, East Siberian margin	78.6617	165.0150	-508	3	23–GC1	3	1.08	1.10	3.66	grey diamict	44	30	22	8	1	12	1	8	7	8	11	19	6
SWERUS-C3_23-GC1	De Long Trough, East Siberian margin	78.6617	165.0150	-508	4	23–GC1	3	1.28	1.30	3.86	grey diamict	24	16	16	6	5	6	0	3	5	6	1	1	8
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	5	24–GC1	1	0.03	0.05	0.04	dark brown clay	7	8	3	2	3	2	0	2	1	1	0	0	7
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	6	24–GC1	1	0.52	0.54	0.53	light brown silty clay	43	18	26	9	1	17	0	13	1	11	8	0	5
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	7	24–GC1	1	0.98	1.00	0.99	olivegreen-grey silty clay	24	19	23	13	0	15	4	5	4	11	5	0	10
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	8	24–GC1	2	0.47	0.49	1.53	olivegreen-grey silty clay	34	8	16	4	1	5	2	4	4	13	16	3	9
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	9	24–GC1	2	1.04	1.06	2.09	light brown silty clay	24	16	16	6	5	6	0	3	5	6	1	1	8
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	10	24–GC1	3	0.34	0.36	2.88	grey clay above diamict	59	37	29	10	1	11	0	3	0	6	9	6	6
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	11	24–GC1	3	0.58	0.60	3.12	grey clay above diamict	59	37	29	10	1	11	0	3	0	6	9	6	6
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	12	24–GC1	3	1.08	1.10	3.61	grey diamict	69	30	13	9	1	11	2	5	13	7	11	0	8
SWERUS-C3_24-GC1	De Long Trough, East Siberian margin	78.7967	165.3667	-964	13	24–GC1	3	1.22	1.24	3.77	grey diamict	69	30	13	9	1	11	2	5	13	7	11	0	8
SWERUS-C3_29-GC1	Southern Lomonosov Ridge	81.2983	141.7817	-824	14	29–GC1	4	1.14	1.16	4.31	light brown silty clay	96	19	21	7	3	14	4	4	7	4	10	0	2
SWERUS-C3_29-GC1	Southern Lomonosov Ridge	81.2983	141.7817	-824	15	29–GC1	4	1.26	1.28	4.43	grey diamict	89	14	16	16	8	6	0	0	5	5	13	0	11
SWERUS-C3_29-GC1	Southern Lomonosov Ridge	81.2983	141.7817	-824	16	29–GC1	4	1.38	1.40	4.55	grey diamict	63	20	25	19	0	13	2	2	12	16	9	2	6
SWERUS-C3_29-GC1	Southern Lomonosov Ridge	81.2983	141.7817	-824	17	29–GC1	4	1.45	1.47	4.62	grey diamict	65	24	36	16	4	4	0	1	1	3	9	0	13