Citation:

PANGAEA.758534

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Abstract:

Quantitative X-Ray Diffraction (qXRD) analysis of the <2 mm sediment fraction from surface (sea floor) samples, and marine sediment cores that span the last 10-12 cal ka BP, are used to describe spatial and temporal variations in non-clay mineral compositions for an area between Kangerlussuaq Trough and Scoresby Sund (?67°-70°N), East Greenland. Bedrock consists primarily of an early Tertiary alkaline complex with high weight% of pyroxene and plagioclase. Farther inland and to the north, the bedrock is dominantly felsic with a high fraction of quartz and potassium feldspars. Principal Component (PC) analysis of the non-clay sediment compositions indicates the importance of quartz and pyroxene as compositional end members, with an abrupt shift from quartz and k-feldspar dominated sediments north of Scoresby Sund to sediments rich in pyroxene and plagioclase feldspars offshore from the early Tertiary basaltic outcrop. Coarse (<2 mm or <1 mm) ice-rafted sediments are largely absent from the trough sediments between ?8 and 5 cal ka BP, but then increase in the last 4 cal ka BP. Compositional unmixing of the sediments in Grivel Basin and Kangerlussuaq Trough indicate the dominance of local over long distance sediment sources, with pulses of sediment from tidewater glaciers in Kangerlussuaq and Nansen fjords reaching the inner shelf during the Neoglaciation. The change in IRD is more dramatic in the sediment grain-size proxies than in the quartz wt%. Forty to seventy percent of the variance in the quartz records from either side of Denmark Strait is explained by low frequency trends, but the data from the Grivel Basin, East Greenland, are distinctly different, with an approximate 2500 yr periodicity.

Related to:

Andrews, John T; Jennings, Anne E; Coleman, George C; Eberl, Dennis D (2010): Holocene variations in mineral and grain-size composition along the East Greenland glaciated margin (ca 67°–70°N): Local versus long-distance sediment transport. Quaternary Science Reviews, 29(19-20), 2619-2632, https://doi.org/10.1016/j.quascirev.2010.06.001

Further details:

Eberl, Dennis D (2003): User's guide to RockJock - A program for determining quantitative mineralogy from powder X-ray diffraction data. U.S. Geological Survey Open-File Report 2003-78, 47 pp, https://pubs.usgs.gov/of/2003/of03-078/

Coverage:

Median Latitude: 73.044888 * Median Longitude: -18.377129 * South-bound Latitude: 70.129000 * West-bound Longitude: -24.610000 * North-bound Latitude: 74.858330 * East-bound Longitude: -15.407500

Date/Time Start: 1990-06-16T20:02:00 * Date/Time End: 1994-09-14T21:31:00

Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 0.19 m

Event(s):

PS1849-1 (GIK21849-1 PS17/015) * Latitude: 70.129000 * Longitude: -15.407500 * Date/Time: 1990-06-16T20:02:00 * Elevation: -1250.0 m * Location: Kolbeinsey Ridge * Campaign: (PS17) * Basis: * Method/Device: Giant box corer (GKG) * Comment: CTD?

PS2623-1 (PS31/129) * Latitude: 74.858330 * Longitude: -17.505000 * Date/Time: 1994-08-28T16:26:00 * Elevation: -342.0 m * Recovery: 0.36 m * Location: Hochstetter Bugten, East Greenland * Campaign: (PS31) * Basis: * Method/Device: Giant box corer (GKG) * Comment: 1 section: 0-38

PS2627-5 (PS31/135) * Latitude: 73.123333 * Longitude: -15.681667 * Date/Time: 1994-09-03T08:21:00 * Elevation: -2009.0 m * Recovery: 0.45 m * Location: East Greenland Sea * Campaign: (PS31) * Basis: * Method/Device: Giant box corer (GKG)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Longitude of event	Longitude
3	Latitude of event	Latitude
4	Elevation of event	Elevation	m
5	DEPTH, sediment/rock	Depth sed	m			Geocode
6	Quartz	Qz	%	Andrews, John T	X-ray diffraction (XRD)
7	Microcline	Mc	%	Andrews, John T	X-ray diffraction (XRD)	ordered
8	Microcline	Mc	%	Andrews, John T	X-ray diffraction (XRD)	intermediate
9	Orthoclase	Or	%	Andrews, John T	X-ray diffraction (XRD)
10	Anorthoclase	Anor	%	Andrews, John T	X-ray diffraction (XRD)
11	Albite	Ab	%	Andrews, John T	X-ray diffraction (XRD)	Cleavelandite
12	Oligoclase	Oligoc	%	Andrews, John T	X-ray diffraction (XRD)	Norway
13	Labradorite	Lab	%	Andrews, John T	X-ray diffraction (XRD)
14	Bytownite	Byt	%	Andrews, John T	X-ray diffraction (XRD)
15	Anorthite	An	%	Andrews, John T	X-ray diffraction (XRD)
16	Calcite	Cal	%	Andrews, John T	X-ray diffraction (XRD)
17	Dolomite	Dol	%	Andrews, John T	X-ray diffraction (XRD)
18	Iron-Dolomite	Fe-Dol	%	Andrews, John T	X-ray diffraction (XRD)
19	Siderite	Sd	%	Andrews, John T	X-ray diffraction (XRD)
20	Halite	Hl	%	Andrews, John T	X-ray diffraction (XRD)
21	Ferrotschermakite	Fts	%	Andrews, John T	X-ray diffraction (XRD)
22	Diopside	Di	%	Andrews, John T	X-ray diffraction (XRD)
23	Pyrite, FeS2	Py	%	Andrews, John T	X-ray diffraction (XRD)
24	Magnetite	Fe3O4	%	Andrews, John T	X-ray diffraction (XRD)
25	Hematite, Fe2O3	Hem	%	Andrews, John T	X-ray diffraction (XRD)
26	Maghemite	Mgh	%	Andrews, John T	X-ray diffraction (XRD)
27	Diatoms	Diatoms	%	Andrews, John T	X-ray diffraction (XRD)
28	Chert	Chert	%	Andrews, John T	X-ray diffraction (XRD)	8.4 nm
29	Non-clay minerals	Non-clay min	%	Andrews, John T	X-ray diffraction (XRD)
30	Kaolinite	Kln	%	Andrews, John T	X-ray diffraction (XRD)	dry branch
31	Saponite	Sap	%	Andrews, John T	X-ray diffraction (XRD)
32	Smectite	Sme	%	Andrews, John T	X-ray diffraction (XRD)	ferruginous
33	Illite	Ill	%	Andrews, John T	X-ray diffraction (XRD)	1Md +dioct. mica & smectite
34	Illite	Ill	%	Andrews, John T	X-ray diffraction (XRD)	1M R>2 88 %I
35	Illite	Ill	%	Andrews, John T	X-ray diffraction (XRD)	1M R>1 70-80 %I
36	Biotite	Bt	%	Andrews, John T	X-ray diffraction (XRD)	1M
37	Iron-Chlorite	Fe chl	%	Andrews, John T	X-ray diffraction (XRD)	Tusc
38	Muscovite	Ms	%	Andrews, John T	X-ray diffraction (XRD)	2M1
39	Illite	Ill	%	Andrews, John T	X-ray diffraction (XRD)	1M PD3B
40	Clay minerals	Clay min	%	Andrews, John T	X-ray diffraction (XRD)
41	Total	Total	%	Andrews, John T	X-ray diffraction (XRD)

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

612 data points

Data

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

1 Event	2 Longitude	3 Latitude	4 Elevation [m]	5 Depth sed [m]	6 Qz [%]	7 Mc [%] (ordered)	8 Mc [%] (intermediate)	9 Or [%]	10 Anor [%]	11 Ab [%] (Cleavelandite)	12 Oligoc [%] (Norway)	13 Lab [%]	14 Byt [%]	15 An [%]	16 Cal [%]	17 Dol [%]	18 Fe-Dol [%]	19 Sd [%]	20 Hl [%]	21 Fts [%]	22 Di [%]	23 Py [%]	25 Hem [%]	26 Mgh [%]	27 Diatoms [%]	28 Chert [%] (8.4 nm)	29 Non-clay min [%]	30 Kln [%] (dry branch)	31 Sap [%]	32 Sme [%] (ferruginous)	33 Ill [%] (1Md +dioct. mica & smectite)	34 Ill [%] (1M R>2 88 %I)	35 Ill [%] (1M R>1 70-80 %I)	36 Bt [%] (1M)	37 Fe chl [%] (Tusc)	38 Ms [%] (2M1)	39 Ill [%] (1M PD3B)	40 Clay min [%]	41 Total [%]
PS1849-1	-15.4075	70.1290	-1250	0.06	21.5	2.0	3.7	1.0	6.8	2.9	0.8	0.7	0.3	0.0	5.1	0.3	1.5	0.5	0.0	1.1	0.9	0.2	0.3	1.5	6.4	7.9	65.4	1.1	9.1	1.9	0.2	2.1	9.1	1.9	5.6	3.3	0.0	34.6	100.0
PS1849-1	-15.4075	70.1290	-1250	0.05	23.4	3.0	3.0	0.7	8.9	2.8	0.0	0.0	0.0	0.1	4.9	0.0	1.6	0.4	0.0	1.3	1.0	0.1	0.1	3.8	6.8	3.2	65.2	0.7	9.5	2.2	2.5	2.6	7.0	1.3	4.2	3.2	1.5	34.8	100.0
PS1849-1	-15.4075	70.1290	-1250	0.07	15.0	1.7	4.0	1.2	6.6	2.8	0.0	0.2	0.0	0.4	5.2	0.0	1.5	0.4	0.0	0.5	1.0	0.3	0.3	2.5	6.4	11.3	61.2	1.3	11.0	2.1	0.0	2.1	9.7	2.4	6.5	3.7	0.0	38.8	100.0
PS1849-1	-15.4075	70.1290	-1250	0.09	18.1	1.3	4.6	1.9	4.5	2.8	1.6	0.9	0.0	0.4	5.5	0.0	1.7	0.4	0.0	0.8	1.2	0.3	0.3	2.8	4.4	9.6	63.4	1.0	5.2	4.0	0.0	3.7	6.6	2.5	8.4	5.3	0.0	36.6	100.0
PS1849-1	-15.4075	70.1290	-1250	0.11	19.0	1.7	4.9	1.0	4.3	3.2	0.6	2.1	0.3	0.0	5.4	0.0	1.7	0.3	0.0	1.0	1.5	0.3	0.3	1.5	4.1	8.3	61.6	1.3	5.2	4.3	0.7	4.9	6.2	2.6	8.7	4.6	0.0	38.4	100.0
PS1849-1	-15.4075	70.1290	-1250	0.13	17.1	1.3	5.0	1.3	5.3	3.0	0.5	1.6	0.0	0.6	5.5	0.0	1.9	0.4	0.0	0.0	1.0	0.3	0.3	2.3	4.0	9.9	61.6	1.2	6.0	4.3	0.0	4.5	7.1	2.5	8.8	4.1	0.0	38.4	100.0
PS1849-1	-15.4075	70.1290	-1250	0.15	19.9	2.2	3.6	0.7	6.6	3.6	0.0	1.2	0.0	0.0	5.4	0.0	1.8	0.5	0.0	0.5	1.0	0.2	0.2	1.6	6.4	8.0	63.4	0.9	9.6	2.0	0.9	2.6	9.5	1.9	5.4	3.7	0.2	36.6	100.0
PS1849-1	-15.4075	70.1290	-1250	0.17	19.5	1.8	4.9	1.4	5.4	1.9	2.0	1.1	0.0	0.3	5.2	0.1	1.7	0.4	0.0	0.4	1.3	0.2	0.3	2.0	3.9	9.6	63.2	0.6	5.4	4.1	0.0	4.6	7.1	2.4	8.4	4.1	0.0	36.8	100.0
PS1849-1	-15.4075	70.1290	-1250	0.19	18.9	1.2	5.4	1.4	5.1	3.8	0.3	1.1	0.0	0.0	5.6	0.0	1.8	0.6	0.0	0.6	1.9	0.3	0.1	2.4	4.0	8.5	63.0	1.2	5.7	4.9	0.1	4.5	5.9	2.5	9.2	3.0	0.0	37.0	100.0
PS2623-1	-17.5050	74.8583	-342	0.00	18.0	0.2	5.1	0.8	5.1	6.3	2.8	1.2	0.0	0.0	0.0	0.1	0.3	0.6	0.1	0.3	0.2	0.1	0.1	1.5	3.8	9.0	55.8	3.7	5.5	4.9	1.2	5.2	6.7	2.5	9.2	4.9	0.5	44.2	100.0
PS2627-5	-15.6817	73.1233	-2009	0.00	20.6	0.4	5.1	1.2	5.2	7.7	3.9	0.9	0.2	0.0	2.0	0.4	0.9	0.2	0.0	0.2	0.2	0.1	0.1	1.2	4.1	9.0	63.7	1.0	4.2	4.7	0.3	4.6	6.0	2.4	8.8	4.4	0.0	36.3	100.0
PS2629-2	-16.4833	73.1583	-850	0.00	20.3	0.2	4.5	1.9	3.0	7.7	3.8	1.7	0.0	0.0	0.0	0.0	0.9	0.4	0.0	1.0	0.5	0.1	0.2	0.3	4.1	7.2	57.9	1.7	3.5	4.8	0.3	4.6	7.1	2.3	10.0	7.7	0.0	42.1	100.0
PS2630-7	-18.0683	73.1600	-287	0.00	15.1	1.2	4.6	0.0	6.8	5.7	1.9	3.0	1.2	0.6	0.1	0.0	0.9	0.0	0.3	1.3	1.5	0.2	0.3	0.8	5.1	9.5	60.2	1.3	4.8	4.9	0.0	3.6	7.4	2.4	9.8	5.5	0.0	39.8	100.0
PS2633-1	-24.6100	73.4817	-284	0.00	25.9	0.3	4.3	0.0	4.4	5.8	5.7	1.0	0.0	0.0	1.2	0.0	1.7	0.8	0.0	1.1	0.5	0.1	0.2	0.0	4.3	8.7	66.1	0.0	2.3	3.4	0.0	0.8	7.2	3.4	8.3	8.5	0.0	33.9	100.0
PS2641-5	-19.4850	73.1550	-469	0.00	12.0	0.6	4.8	0.0	4.6	5.1	3.0	1.3	0.6	1.5	0.0	0.0	1.2	0.5	0.0	0.5	0.6	0.2	0.1	1.2	4.8	10.9	53.5	1.4	6.8	4.8	0.7	1.6	8.2	4.0	9.6	9.4	0.0	46.5	100.0
PS2631-2	-22.1867	73.1783	-429	0.00	6.3	0.1	3.5	0.0	2.1	4.8	2.2	2.0	1.4	0.7	0.0	0.0	1.7	0.3	0.2	0.7	1.1	0.2	0.3	3.1	5.7	11.9	48.3	1.3	8.8	6.4	0.0	1.5	6.8	4.8	11.0	11.0	0.0	51.7	100.0
PS2628-2	-15.9667	73.1600	-1702	0.00	13.3	1.2	3.1	1.0	2.7	6.3	2.3	1.9	1.2	0.3	3.6	0.1	1.1	0.1	0.2	0.3	0.5	0.1	0.0	2.2	4.8	10.8	57.2	1.4	6.5	5.5	0.0	1.1	5.8	4.0	9.3	9.2	0.0	42.8	100.0