noaa-ocean-13568 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. Labrador Sea HU97048-007PC 58KYr Sediment Source Data 2012-11-14 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/13568 Investigator J.T. Andrews Investigator D.C. Barber Investigator A.E. Jennings Investigator D.D. Eberl Investigator B. Maclean Investigator M.E. Kirby Investigator J.S. Stoner 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 geochemistry earth science paleoclimate paleocean magnetic susceptibility geoscientificInformation Heinrich Events 58000 cal yr BP 0 cal yr BP Complete 62.673 62.673 -60.573 -60.573 Ocean Atlantic Ocean North Atlantic Ocean HU97048-007PC>LATITUDE 62.673>LONGITUDE -60.573 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII 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

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

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2012/andrews2012xrd.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2012/andrews2012rpi.txt USA/NOAA DIF Version 9.8.4 2019-06-03 2019-06-03