Labrador Sea HU97048-007PC 58KYr Sediment Source Data Andrews, J.T.; Barber, D.C.; Jennings, A.E.; Eberl, D.D.; Maclean, B.; Kirby, M.E.; Stoner, J.S. Andrews, J.T. Barber, D.C. Jennings, A.E. Eberl, D.D. Maclean, B. Kirby, M.E. Stoner, J.S. Heinrich Events earth science/paleoclimate/paleoceanography (natural remanent magnetization/isothermal remanent magnetization,sediment,null,dimensionless,null,paleoceanography,null,null,N,NRM30/IRM30) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,N,degree of fit) earth science/paleoclimate/paleoceanography (bytownite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (anorthite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (dolomite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (halite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (smectite,sediment,null,weight percent,null,paleoceanography,null,null,N,Ferruginous smectite) earth science/paleoclimate/paleoceanography (chlorite,sediment,null,weight percent,null,paleoceanography,null,null,N,Fe-chlorite; Tusc) earth science/paleoclimate/paleoceanography (potassium feldspar,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (plagioclase feldspar series,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (calcite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (siderite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (maghemite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (smectite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (natural remanent magnetization/isothermal remanent magnetization,sediment,null,dimensionless,null,paleoceanography,null,null,N,NRM45/IRM45) earth science/paleoclimate/paleoceanography (quartz,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (anorthoclase,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (carbonate,sediment,null,weight percent,null,paleoceanography,null,null,N,total carbonate) earth science/paleoclimate/paleoceanography (dolomite,sediment,null,weight percent,null,paleoceanography,null,null,N,Fe-dolomite) earth science/paleoclimate/paleoceanography (magnetite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (saponite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (illite,sediment,null,weight percent,null,paleoceanography,null,null,N,1M; plus mica and smectite) earth science/paleoclimate/paleoceanography (mineral matter,sediment,null,weight percent,null,paleoceanography,null,null,N,total minerals) earth science/paleoclimate/paleoceanography (illite,sediment,null,weight percent,null,paleoceanography,null,null,N,1M; (R>2; 88%I)) earth science/paleoclimate/paleoceanography (age,null,null,calendar year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (natural remanent magnetization/isothermal remanent magnetization,sediment,null,dimensionless,null,paleoceanography,null,null,N,NRM20/IRM20) earth science/paleoclimate/paleoceanography (natural remanent magnetization/isothermal remanent magnetization,sediment,null,dimensionless,null,paleoceanography,null,null,N,NRM35/IRM35) earth science/paleoclimate/paleoceanography (natural remanent magnetization/isothermal remanent magnetization,sediment,null,dimensionless,null,paleoceanography,null,null,N,NRM50/IRM50) earth science/paleoclimate/paleoceanography (microcline,sediment,null,weight percent,null,paleoceanography,null,null,N,intermediate microcline) earth science/paleoclimate/paleoceanography (oligoclase,sediment,null,weight percent,null,paleoceanography,null,null,N,Norway source) earth science/paleoclimate/paleoceanography (silicon dioxide,sediment,null,weight percent,null,paleoceanography,null,null,N,reported as chert) earth science/paleoclimate/paleoceanography (mineral index,sediment,null,weight percent,null,paleoceanography,null,null,N,clay minerals) earth science/paleoclimate/paleoceanography (natural remanent magnetization/isothermal remanent magnetization,sediment,null,dimensionless,null,paleoceanography,null,null,N,NRM40/IRM40) earth science/paleoclimate/paleoceanography (orthoclase,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (plagioclase feldspar series,sediment,null,weight percent,null,paleoceanography,null,null,N,without carbonate) earth science/paleoclimate/paleoceanography (dolomite,sediment,null,weight percent,null,paleoceanography,null,null,N,total dolomite) earth science/paleoclimate/paleoceanography (mineral index,sediment,null,dimensionless,null,paleoceanography,null,null,N,calcite/dolomite) earth science/paleoclimate/paleoceanography (pyroxene,sediment,null,weight percent,null,paleoceanography,null,null,N,diopside) earth science/paleoclimate/paleoceanography (mineral index,sediment,null,weight percent,null,paleoceanography,null,null,N,non-clay minerals) earth science/paleoclimate/paleoceanography (biotite series,sediment,null,weight percent,null,paleoceanography,null,null,N,1M) earth science/paleoclimate/paleoceanography (kaolinite,sediment,null,weight percent,null,paleoceanography,null,null,N,dry branch) earth science/paleoclimate/paleoceanography (smectite,sediment,null,weight percent,null,paleoceanography,null,null,N,without carbonate) earth science/paleoclimate/paleoceanography (illite,sediment,null,weight percent,null,paleoceanography,null,null,N,1M; (R>1; 70-80%I)) earth science/paleoclimate/paleoceanography (illite,sediment,null,weight percent,null,paleoceanography,null,null,N,1M; PD3B) earth science/paleoclimate/paleoceanography (microcline,sediment,null,weight percent,null,paleoceanography,null,null,N,ordered microcline) earth science/paleoclimate/paleoceanography (potassium feldspar,sediment,null,weight percent,null,paleoceanography,null,null,N,without carbonate) earth science/paleoclimate/paleoceanography (cleavelandite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (labradorite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (identified diatom,sediment,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (muscovite,sediment,null,weight percent,null,paleoceanography,null,null,N,2M1) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (amphibole,sediment,null,weight percent,null,paleoceanography,null,null,N,ferrotschermakite) earth science/paleoclimate/paleoceanography (pyrite,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (hematite group,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (kaolinite,sediment,null,weight percent,null,paleoceanography,null,null,N,without carbonate) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (HU97048-007PC>LATITUDE 62.673>LONGITUDE -60.573) Core HU97048-007PC was recovered from the continental Labrador Sea slope at a water depth of 945m, 250km seaward from the mouth of Cumberland Sound, and 400km north of Hudson Strait. Cumberland Sound is a structural trough partly floored by Cretaceous mudstones and Paleozoic carbonates. The record extends from ~10 to 58ka. On-board logging revealed a complex series of lithofacies, including buff-colored detrital carbonate-rich sediments [Heinrich (H)-events] frequently bracketed by black facies. We investigate the provenance of these facies using quantitative X-ray diffraction on drill-core samples from Paleozoic and Cretaceous bedrock from the SE Baffin Island Shelf, and on the <2-mm sediment fraction in a transect of five cores from Cumberland Sound to the NW Labrador Sea. A sediment unmixing program was used to discriminate between sediment sources, which included dolomite-rich sediments from Baffin Bay, calcite-rich sediments from Hudson Strait and discrete sources from Cumberland Sound. Results indicated that the bulk of the sediment was derived from Cumberland Sound, but Baffin Bay contributed to sediments coeval with H-0 (Younger Dryas), whereas Hudson Strait was the source during H-events 1-4. Contributions from the Cretaceous outcrops within Cumberland Sound bracket H-events, thus both leading and lagging Hudson Strait-sourced H-events. STUDY NOTES: Data set includes quantitative X-ray diffraction results and radiocarbon dates from core HU97048-007PC, and other cores, on the NW slope of the Labrador Sea and the mineralogy of bedrock samples from the SE Baffin Island shelf. Relative paleomagnetic intensity (RPI, NRM/IRM) from HU97048-007PC is also reported. IRM=Isothermal Remanent Magnetization NRM=Natural Remanent Magnetization NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Andrews, J.T. Investigator : Barber, D.C. Investigator : Jennings, A.E. Investigator : Eberl, D.D. Investigator : Maclean, B. Investigator : Kirby, M.E. Investigator : Stoner, J.S. 2012-11-14 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13568 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2012/andrews2012xrd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2012/andrews2012rpi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2012/andrews2012xrd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2012/andrews2012rpi.txt English https://www.ncdc.noaa.gov/paleo/study/13568 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2012/andrews2012xrd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2012/andrews2012rpi.txt Andrews, J.T., D.C. Barber, A.E. Jennings, D.D. Eberl, B. Maclean, M.E. Kirby, and J.S. Stoner. 2012. Varying sediment sources (Hudson Strait, Cumberland Sound, Baffin Bay) to the NW Labrador Sea slope between and during Heinrich events 0 to 4. Journal of Quaternary Science, Vol. 27, No. 5, pp. 475-484. DOI: 10.1002/jqs.2535 START YEAR: 58000 cal yr BP * END YEAR: 0 cal yr BP -60.573 62.673 -60.573 62.673