Citation:

G20734.1

Name: (Table DR1) Argon isotope data and dating for individual >63 µm amphibole grains from Labrador Sea sediments, ODP Hole 105-647A
Published: 2004
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Variations of global and regional silicate weathering rates and paleo-ocean circulation patterns are estimated by using radiogenic isotope records, but the effects of changes in provenance are generally ignored. Here sediment provenance has been constrained through the use of Ar-Ar ages for individual detrital minerals from the Labrador Sea, which can be compared directly to the radiogenic isotope compositions from the same core material. Dramatic changes in the radiogenic isotope composition of North Atlantic Deep Water through the Quaternary Period are shown to reflect discrete changes in both sources and weathering processes accompanying Northern Hemisphere glaciation. Changes in the different radiogenic isotope systems reflect the influence of source, physical weathering, and chemical weathering, and not simply changes in the underlying weathering rate or ocean circulation patterns that are typically inferred.

Other version:

Table DR1: Argon isotope data and age analyses from ODP Hole 105-647A

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: 53.331300 * Longitude: -45.262000

Date/Time Start: 1985-10-15T04:10:00 * Date/Time End: 1985-10-23T18:15:00

Minimum Elevation: -3869.0 m * Maximum Elevation: -3869.0 m

Event(s):

105-647A * Latitude: 53.331300 * Longitude: -45.262000 * Date/Time Start: 1985-10-15T04:10:00 * Date/Time End: 1985-10-23T18:15:00 * Elevation: -3869.0 m * Penetration: 736 m * Recovery: 444.6 m * Location: South Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 75 cores; 716.6 m cored; 0 m drilled; 62 % recovery

Comment:

Parameter "Age" shows sediment age.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	AGE	Age	ka BP			Geocode
2	Sample code/label	Sample label		Reynolds, Ben C	DSDP/ODP/IODP sample designation
3	Number	No		Reynolds, Ben C
4	Method comment	Method comm		Reynolds, Ben C
5	Argon-40	40Ar	arbitrary units	Reynolds, Ben C
6	Argon-40, standard deviation	40Ar std dev	±	Reynolds, Ben C		error, +/-
7	Argon-39	39Ar	arbitrary units	Reynolds, Ben C
8	Standard deviation	Std dev	±	Reynolds, Ben C		Ar39, error, +/-
9	Argon-36/Argon-39	36Ar/39Ar	10^-3	Reynolds, Ben C	Infrared laser ablation microprobe (IRLAMP)
10	Argon-36/Argon-39, standard deviation	36Ar/39Ar std dev	±	Reynolds, Ben C	Calculated
11	Argon-37/Argon-39	37Ar/39Ar		Reynolds, Ben C	Infrared laser ablation microprobe (IRLAMP)
12	Argon-37/Argon-39, standard deviation	37Ar/39Ar std dev	±	Reynolds, Ben C	Calculated
13	Argon-38/Argon-39	38Ar/39Ar		Reynolds, Ben C	Infrared laser ablation microprobe (IRLAMP)
14	Argon-38/Argon-39, standard deviation	38Ar/39Ar std dev	±	Reynolds, Ben C	Calculated
15	Argon-40/Argon-39	40Ar/39Ar		Reynolds, Ben C	Infrared laser ablation microprobe (IRLAMP)
16	Argon-40/Argon-39	40Ar/39Ar		Reynolds, Ben C	Infrared laser ablation microprobe (IRLAMP)	40Ar*/39Ar
17	Argon-40/Argon-39, standard deviation	40Ar/39Ar std dev	±	Reynolds, Ben C	Calculated
18	Argon-40/Argon-39, standard deviation	40Ar/39Ar std dev	±	Reynolds, Ben C	Calculated	40Ar*/39Ar
19	Age, dated	Age dated	ka	Reynolds, Ben C	Infrared laser ablation microprobe (IRLAMP)	of amphibole grains
20	Age, dated standard deviation	Age dated std dev	±	Reynolds, Ben C	Calculated

License:

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

Size:

4595 data points

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