Data Description

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Citation:
Kusch, S et al. (2010): (Table 2) Radiocarbon data (fMC; fraction modern carbon and conventional 14C ages) of foraminifera, TOC and alkenones of cores ME0005A-24JC, Y69-71P and MC16. Unpublished dataset #735532,
Supplement to: Kusch, Stephanie; Eglinton, Timothy I; Mix, Alan C; Mollenhauer, Gesine (2010): Timescales of lateral sediment transport in the Panama Basin as revealed by radiocarbon ages of alkenones, total organic carbon and foraminifera. Earth and Planetary Science Letters, 290(3-4), 340-350, doi:10.1016/j.epsl.2009.12.030
Abstract:
Paired radiocarbon measurements on haptophyte biomarkers (alkenones) and on co-occurring tests of planktic foraminifera (Neogloboquadrina dutertrei and Globogerinoides sacculifer) from late glacial to Holocene sediments at core locations ME0005-24JC, Y69-71P, and MC16 from the south-western and central Panama Basin indicate no significant addition of pre-aged alkenones by lateral advection. The strong temporal correspondence between alkenones, foraminifera and total organic carbon (TOC) also implies negligible contributions of aged terrigenous material. Considering controversial evidence for sediment redistribution in previous studies of these sites, our data imply that the laterally supplied material cannot stem from remobilization of substantially aged sediments. Transport, if any, requires syn-depositional nepheloid layer transport and redistribution of low-density or fine-grained components within decades of particle formation. Such rapid and local transport minimizes the potential for temporal decoupling of proxies residing in different grain-size fractions and thus facilitates comparison of various proxies for paleoceanographic reconstructions in this study area. Anomalously old foraminiferal tests from a glacial depth interval of core Y69-71P may result from episodic spillover of fast bottom currents across the Carnegie Ridge transporting foraminiferal sands towards the north.
Project(s):
Coverage:
Median Latitude: 0.660567 * Median Longitude: -86.417210 * South-bound Latitude: 0.021700 * West-bound Longitude: -86.483330 * North-bound Latitude: 1.860000 * East-bound Longitude: -86.305000
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 3.5 m
Event(s):
MC16 * * Latitude: 1.860000 * Longitude: -86.305000 * Elevation: -2767.0 m * Location: Panama Basin * * Campaign: KNR182-9 * * Basis: Knorr * * Device: Gravity corer *
ME0005A-24JC * * Latitude: 0.021700 * Longitude: -86.463300 * Elevation: -2941.0 m * Location: South Pacific Ocean * * Campaign: ME0005A (NEMO) * * Basis: Melville * * Device: Gravity corer *
Y69-71P * * Latitude: 0.100000 * Longitude: -86.483330 * Elevation: -2740.0 m * Location: South Pacific Ocean * * Campaign: YALOC69 * * Basis: Yaquina * * Device: Piston corer *
Comment:
Depths Comment (Depth in cm) refer to foraminifera samples, if different from organic matter samples. Analytical uncertainties are given as 1 Sigma analytical errors.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEventMetadata
2DEPTH, sediment/rock *DepthmGeocode
3Depth, top/min *Depth topmKusch, Stephanie *
4Depth, bottom/max *Depth botmKusch, Stephanie *
5Depth Comment *Depth CommentKusch, Stephanie *
6Age, dated material *Dated materialKusch, Stephanie *Foraminifera
7Reference/source *ReferenceKusch, Stephanie *Foraminifera
8Fraction modern carbon *fMCKusch, Stephanie *Age, 14C AMS *Foraminifera
9Carbon 14, modern, standard deviation *fMC std devKusch, Stephanie *Age, 14C AMS *Foraminifera
10Age, dated *Age datedkaKusch, Stephanie *Age, 14C AMS *Foraminifera
11Age, dated standard deviation *Age std devKusch, Stephanie *Age, 14C AMS *Foraminifera
12Fraction modern carbon *fMCKusch, Stephanie *Age, 14C AMS *TOC
13Carbon 14, modern, standard deviation *fMC std devKusch, Stephanie *Age, 14C AMS *TOC
14Age, dated *Age datedkaKusch, Stephanie *Age, 14C AMS *TOC
15Age, dated standard deviation *Age std devKusch, Stephanie *Age, 14C AMS *TOC
16Fraction modern carbon *fMCKusch, Stephanie *Age, 14C AMS *Alkenones
17Carbon 14, modern, standard deviation *fMC std devKusch, Stephanie *Age, 14C AMS *Alkenones
18Age, dated *Age datedkaKusch, Stephanie *Age, 14C AMS *Alkenones
19Age, dated standard deviation *Age std devKusch, Stephanie *Age, 14C AMS *Alkenones
Size:
304 data points

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