Citation:

PANGAEA.990398 (dataset in review)

Name: U-Th dating of sediment cores collected in 2014 on the reef slope of Clerke Island, Australia
Creator: Ellen Hall
License: https://creativecommons.org/licenses/by/4.0/
Keywords: community composition; Coral; dating; MC-ICP-MS; Sediment core; U-Th

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Abstract:

Twelve reef sediment cores were collected on the leeward reef slope of Clerke Island, QLD, Australia via manual percussion coring on SCUBA in August of 2014. Each of these sediment cores were then divided into 5 cm subsections and sieved to collect clasts >4 mm. The genus of coral clasts >4 mm within each subsection were identified. To temporally constrain the changes in community composition, U-Th dating was conducted on samples within each core. Samples were cut, crushed and cleaned then grains of pure aragonite were selected under a binocular microscope for dating purposes. Analysis occurred at the University of Queensland's Radiogenic Isotope Facility in mid 2021 using a Nu Plasma I Multi-collector Inductively Coupled Plasma Mass Spectrometer.

Keyword(s):

community composition; Coral; dating; MC-ICP-MS; Sediment core; U-Th

Funding:

Australian Research Council (ARC), grant/award no. LE170100219 : A multi-institutional environmental radioactivity research centre

Department of the Environment, grant/award no. DP180102526: National Environmental Research Program Tropical Ecosystems Hub Project 1.3

Coverage:

Median Latitude: -11.971877 * Median Longitude: 143.282820 * South-bound Latitude: -11.974900 * West-bound Longitude: 143.281580 * North-bound Latitude: -11.967880 * East-bound Longitude: 143.284460

Date/Time Start: 2014-08-04T02:40:00 * Date/Time End: 2014-08-16T05:25:00

Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 3.35 m

Event(s):

CLES1C1 * Latitude: -11.972850 * Longitude: 143.282420 * Date/Time: 2014-08-04T02:40:00 * Elevation: -2.2 m * Location: Coral Sea * Method/Device: Manual percussion coring conducted on SCUBA

CLES1C2 * Latitude: -11.972850 * Longitude: 143.282420 * Date/Time: 2014-08-04T05:30:00 * Elevation: -1.2 m * Location: Coral Sea * Method/Device: Manual percussion coring conducted on SCUBA

CLES1C3 * Latitude: -11.972850 * Longitude: 143.282420 * Date/Time: 2014-08-04T22:55:00 * Elevation: -2.6 m * Location: Coral Sea * Method/Device: Manual percussion coring conducted on SCUBA

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Hall, Ellen
2	Latitude of event	Latitude		Hall, Ellen
3	Longitude of event	Longitude		Hall, Ellen
4	Laboratory code/label	Lab label		Hall, Ellen
5	Sample code/label	Sample label		Hall, Ellen
6	Comment	Comment		Hall, Ellen
7	DEPTH, sediment/rock	Depth sed	m	Hall, Ellen		Geocode – sampling interval minimum depth
8	DEPTH, sediment/rock	Depth sed	m	Hall, Ellen		Geocode – sampling interval maximum depth
9	Depth comment	Depth comm		Hall, Ellen
10	Uranium	U	mg/kg	Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)	ppm
11	Uranium, standard deviation	U std dev	±	Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)	2σ
12	Thorium-232	232Th	µg/kg	Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)	ppb
13	Thorium, standard deviation	Th std dev	±	Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)	2σ
14	Thorium-230/Thorium-232 activity ratio	(230Th/232Th)		Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)
15	Thorium-230/Thorium-232 activity ratio, standard deviation	(230Th/232Th) std dev	±	Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)	2σ
16	Thorium-230/Uranium-238 activity ratio	(230Th/238U)		Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)
17	Thorium-230/Uranium-238 activity ratio, standard deviation	(230Th/238U) std dev	±	Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)	2σ
18	Uranium-234/Uranium-238 activity ratio	(234U/238U)		Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)
19	Uranium-234/Uranium-238 activity ratio, standard deviation	(234U/238U) std dev	±	Hall, Ellen	Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)	2σ
20	Age, dated	Age dated	ka	Hall, Ellen	Age, 230Thorium, uncorrected
21	Age, dated, standard deviation	Age dated std dev	±	Hall, Ellen	Age, 230Thorium, uncorrected	2σ
22	Age, dated	Age dated	ka	Hall, Ellen	Age, 230Thorium, corrected
23	Age, dated, standard deviation	Age dated std dev	±	Hall, Ellen	Age, 230Thorium, corrected	2σ
24	Uranium-234/Uranium-238 activity ratio (0)	234U/238U(0)		Hall, Ellen	Corrected	Initial (234U/ 238U)
25	Uranium-234/Uranium-238 activity ratio (0), standard deviation	234U/238U(0) std dev	±	Hall, Ellen	Corrected	2σ
26	Year of experiment	Year exp		Hall, Ellen		Date of chemistry
27	Age	Age	a AD/CE	Hall, Ellen		Year (AD)
28	Age, standard deviation	Age std dev	±	Hall, Ellen		2σ

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Size:

2523 data points

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