Citation:

2007PA001478

Name: (Table 1) The 10Be and 9Be isotope record of IODP EXP202 composite Site
Published: 2008
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The upper 200 m of the sediments recovered during IODP Leg 302, the Arctic Coring Expedition (ACEX), to the Lomonosov Ridge in the central Arctic Ocean consist almost exclusively of detrital material. The scarcity of biostratigraphic markers severely complicates the establishment of a reliable chronostratigraphic framework for these sediments, which contain the first continuous record of the Neogene environmental and climatic evolution of the Arctic region. Here we present profiles of cosmogenic 10Be together with the seawater-derived fraction of stable 9Be obtained from the ACEX cores. The down-core decrease of 10Be/9Be provides an average sedimentation rate of 14.5 ± 1 m/Ma for the uppermost 151 m of the ACEX record and allows the establishment of a chronostratigraphy for the past 12.3 Ma. The age corrected 10Be concentrations and 10Be/9Be ratios suggest the existence of an essentially continuous sea ice cover over the past 12.3 Ma.

Project(s):

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

International Polar Year (2007-2008) (IPY)

Coverage:

Median Latitude: 87.399199 * Median Longitude: 139.664730 * South-bound Latitude: 86.408667 * West-bound Longitude: 136.189680 * North-bound Latitude: 87.921180 * East-bound Longitude: 143.439500

Date/Time Start: 1996-08-04T00:00:00 * Date/Time End: 2004-09-03T00:00:00

Minimum DEPTH, sediment/rock: 0.02 m * Maximum DEPTH, sediment/rock: 151.28 m

Event(s):

302-M0002A (ACEX-M2A) * Latitude: 87.921180 * Longitude: 139.365010 * Date/Time: 2004-08-19T00:00:00 * Elevation: -1209.0 m * IGSN: IBCR0302RHTS001 * Penetration: 270.1 m * Recovery: 214.68 m * Location: Arctic Ocean * Campaign: (Arctic Coring Expedition, ACEX) * Basis: CCGS Captain Molly Kool (Vidar Viking)

302-M0004C (ACEX-M4C) * Latitude: 87.867750 * Longitude: 136.189680 * Date/Time: 2004-09-03T00:00:00 * Elevation: -1287.9 m * IGSN: IBCR0302RHXS001 * Penetration: 37.33 m * Recovery: 25.6 m * Location: Arctic Ocean * Campaign: (Arctic Coring Expedition, ACEX) * Basis: CCGS Captain Molly Kool (Vidar Viking)

OD96_09-1 * Latitude: 86.408667 * Longitude: 143.439500 * Date/Time: 1996-08-04T00:00:00 * Elevation: -927.0 m * Recovery: 2.93 m * Location: Arctic Ocean * Campaign: * Basis: Oden * Method/Device: Piston corer (PC)

Comment:

DEPTH, sediment/rock [m] is given in mcd. Hiatusus in 302-M0002a between 135.49 and 140.44 mcd, in 96/09-1pc between 1.69 and 1.79 mcd. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	DEPTH, sediment/rock	Depth sed	m			Geocode
3	Sample code/label	Sample label		Frank, Martin	DSDP/ODP/IODP sample designation
4	AGE	Age	ka BP			Geocode
5	Beryllium-10	10Be	10⁹ atoms/g	Frank, Martin	Inductively coupled plasma - mass spectrometry (ICP-MS)
6	Beryllium-10, standard deviation	10Be std dev	±	Frank, Martin	Inductively coupled plasma - mass spectrometry (ICP-MS)	1 sigma S.E.
7	Beryllium-9	9Be	µg/g	Frank, Martin	Inductively coupled plasma - mass spectrometry (ICP-MS)
8	Beryllium-10/Beryllium-9	10Be/9Be	10^-9 atoms/atoms	Frank, Martin	Inductively coupled plasma - mass spectrometry (ICP-MS)
9	Beryllium-10/Beryllium-9, standard deviation	10Be/9Be std dev	±	Frank, Martin	Inductively coupled plasma - mass spectrometry (ICP-MS)	1 sigma S.E.

License:

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

Size:

204 data points

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