noaa-ocean-12275 Baffin Bay Holocene/Late Glacial Mineralogical Data Andrews, J.T.; Eberl, D.D. Baffin Bay Holocene/Late Glacial Mineralogical Data 2011-11-17 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/12275 Investigator J.T. Andrews Investigator D.D. Eberl earth science paleoclimate paleoceanography calcite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography illite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,1MillR>2 earth science paleoclimate paleoceanography calcite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,Mg calcite earth science paleoclimate paleoceanography saturation isothermal remanent magnetization,sediment,null,unspecified unit,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography isothermal remanent magnetization,sediment,null,unspecified unit,null,paleoceanography,null,null,N,backfield isothermal remanent magnetization 0.1T earth science paleoclimate paleoceanography grain size mean,sediment,null,unspecified unit,null,paleoceanography,null,laser particle size analysis,N,null earth science paleoclimate paleoceanography microcline,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,ordered microcline feldspar earth science paleoclimate paleoceanography albite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography labradorite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography pyroxene,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography aragonite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography S-ratio,sediment,null,dimensionless,null,paleoceanography,null,null,N,S 0.3 earth science paleoclimate paleoceanography grain size class,sediment,null,dimensionless,null,paleoceanography,null,laser particle size analysis,N,clay/silt ratio earth science paleoclimate paleoceanography dolomite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,total dolomite earth science paleoclimate paleoceanography dolomite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography grain size skewness,sediment,null,dimensionless,null,paleoceanography,null,laser particle size analysis,N,null earth science paleoclimate paleoceanography blue-yellow contrast,sediment,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography quartz,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography sample identification,null,null,null,null,paleoceanography,null,null,C,null earth science paleoclimate paleoceanography siderite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography halite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography magnetite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography longitude,null,null,degree east,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography clay,sediment,null,percent,null,paleoceanography,null,laser particle size analysis,N,<2mm fraction earth science paleoclimate paleoceanography red-green contrast,sediment,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography microcline,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,intermediate microcline feldspar earth science paleoclimate paleoceanography orthoclase,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography pyrite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography maghemite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography total diatoms,sediment,null,weight percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography kaolinite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography saponite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography illite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,Illite1MPD3B earth science paleoclimate paleoceanography clay,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography collection water depth,null,null,meter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography isothermal remanent magnetization,sediment,null,unspecified unit,null,paleoceanography,null,null,N,backfield isothermal remanent magnetization 0.3T earth science paleoclimate paleoceanography silt,sediment,null,percent,null,paleoceanography,null,laser particle size analysis,N,<2mm fraction earth science paleoclimate paleoceanography grain size standard deviation,sediment,null,unspecified unit,null,paleoceanography,null,laser particle size analysis,N,null earth science paleoclimate paleoceanography grain size kurtosis,sediment,null,dimensionless,null,paleoceanography,null,laser particle size analysis,N,null earth science paleoclimate paleoceanography lightness,sediment,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography anorthoclase,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography oligoclase,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography dolomite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,Fe-dolomite earth science paleoclimate paleoceanography amphibole,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography muscovite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,Muscov2M1 earth science paleoclimate paleoceanography isothermal remanent magnetization,sediment,null,unspecified unit,null,paleoceanography,null,null,N,hard isothermal remanent magnetization; HIRM0.1 earth science paleoclimate paleoceanography isothermal remanent magnetization,sediment,null,unspecified unit,null,paleoceanography,null,null,N,HIRM0.3 earth science paleoclimate paleoceanography mineral index,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,total non-clay earth science paleoclimate paleoceanography smectite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,Ferruginous smectite earth science paleoclimate paleoceanography chlorite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,Fe-Chlorite earth science paleoclimate paleoceanography S-ratio,sediment,null,dimensionless,null,paleoceanography,null,null,N,S 0.1 earth science paleoclimate paleoceanography bytownite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography anorthite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,null earth science paleoclimate paleoceanography quartz,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,chert.8.4nm earth science paleoclimate paleoceanography illite,sediment,null,weight percent,null,paleoceanography,null,x-ray diffraction,N,1MillR>1 earth science paleoclimate paleoceanography latitude,null,null,degree north,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography mass magnetic susceptibility,sediment,null,unspecified unit,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography sand,sediment,null,percent,null,paleoceanography,null,laser particle size analysis,N,<2mm fraction earth science paleoclimate paleocean geochemistry geoscientificInformation 13000 cal yr BP 2000 cal yr BP Complete 68.228 75.469 -70.635 -57.618 -2357 -437 Ocean Atlantic Ocean North Atlantic Ocean JC175BC06>LATITUDE 69.933>LONGITUDE -63.06 Ocean Atlantic Ocean North Atlantic Ocean HU2008029-66>LATITUDE 72.434>LONGITUDE -67.878 Ocean Atlantic Ocean North Atlantic Ocean HU2008029-14>LATITUDE 70.461>LONGITUDE -64.657 Ocean Atlantic Ocean North Atlantic Ocean HU2008029-19>LATITUDE 75.469>LONGITUDE -70.635 Ocean Atlantic Ocean North Atlantic Ocean HU2008029-68>LATITUDE 68.228>LONGITUDE -57.618 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

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Boulder CO 80305-3328 USA online ASCII Andrews, J.T. and D.D. Eberl. 2011. Surface (sea floor) and near-surface (box cores) sediment mineralogy in Baffin Bay as a key to sediment provenance and ice sheet variations. Canadian Journal of Earth Sciences, Vol. 48, pp. 1307-1328. doi: 10.1139/e11-021

To better understand the glacial history of the ice sheets surrounding Baffin Bay and to provide information on sediment pathways, samples from 82 seafloor grabs and core tops, and from seven box cores were subjected to quantitative X-ray diffraction weight percent (wt.%) analysis of the <2 mm sediment fraction. The samples were collected between 67°N and 78°N, in water depths of 155 to 2375 m and were retrieved on cruises between A.D. 1964 and 2009. Grain size, magnetic characteristics, and colour reflectance data were also obtained on many of the samples. Twenty-one non-clay and 10 clay mineral species were identified; the average wt.% of the non-clay minerals was 70% and was dominated by quartz, various feldspars, and dolomite, whereas the dominant clay minerals were 1 M illite, biotite, and chlorite. Cluster analysis on principal component scores identified three main mineral groups, which also had strong associations with grain size and sediment magnetic properties. Box cores from the deep central basin (>2000 m) all show an abrupt drop in calcite wt.% (post-5 cal ka BP?) following a major peak in detrital carbonate (mainly dolomite). This dolomite-rich detrital carbonate (DC) event in JR175BC06 is possibly coeval with the Younger Dryas cold event. Four possible glacial-sourced end members were employed in a compositional unmixing algorithm to gain insight into down core changes in sediment provenance at the deep central basin. Estimates of the rates of sediment accumulation in the central basin are only in the range of 2 to 4 cm/cal ka, surprisingly low given the glaciated nature of the surrounding land. STUDY NOTES: Sediment mineral composition data from X-ray diffraction weight percent (wt.%) analysis of the <2 mm sediment fraction from 82 seafloor samples and 6 box cores collected in Baffin Bay.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2011/andrews2011.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2011/andrews2011.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11