noaa-ocean-10421 East Greenland Margin Holocene Glacial Mineralogy Data Andrews, J.T.; Jennings, A.E.; Coleman, G.C.; Eberl, D.D. East Greenland Margin Holocene Glacial Mineralogy Data 2010-07-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/10421 Investigator J.T. Andrews Investigator A.E. Jennings Investigator G.C. Coleman Investigator D.D. Eberl earth science paleoclimate paleocean geochemistry geoscientificInformation 12000 cal yr BP 0 cal yr BP Complete 67.136 68.409 -32.331 -27.835 -872 -244 Ocean Atlantic Ocean North Atlantic Ocean BS1191-K14>LATITUDE 68.191>LONGITUDE -29.595 Ocean Atlantic Ocean North Atlantic Ocean BS1191-K6>LATITUDE 68.409>LONGITUDE -32.331 Ocean Atlantic Ocean North Atlantic Ocean MD99-2317>LATITUDE 68.103>LONGITUDE -27.861 Ocean Atlantic Ocean North Atlantic Ocean BS1191-K12>LATITUDE 68.111>LONGITUDE -31.425 Ocean Atlantic Ocean North Atlantic Ocean BS1191-K11>LATITUDE 68.115>LONGITUDE -31.431 Ocean Atlantic Ocean North Atlantic Ocean MD99-2322>LATITUDE 67.136>LONGITUDE -30.828 Ocean Atlantic Ocean North Atlantic Ocean JM96-1210>LATITUDE 68.183>LONGITUDE -29.6 Ocean Atlantic Ocean North Atlantic Ocean JM96-1207>LATITUDE 68.1>LONGITUDE -29.35 Ocean Atlantic Ocean North Atlantic Ocean JM96-1214 >LATITUDE 67.3>LONGITUDE -30.966 Ocean Atlantic Ocean North Atlantic Ocean BS1191-K8>LATITUDE 68.133>LONGITUDE -31.862 Ocean Atlantic Ocean North Atlantic Ocean BS1191-K5>LATITUDE 67.409>LONGITUDE -31.066 Ocean Atlantic Ocean North Atlantic Ocean JM96-1205>LATITUDE 68.071>LONGITUDE -27.835 Ocean Atlantic Ocean North Atlantic Ocean BS1191-K15>LATITUDE 68.1>LONGITUDE -29.454 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., A.E. Jennings, G.C. Coleman, and D.D. Eberl. 2010. Holocene variations in mineral and grain-size composition along the East Greenland glaciated margin (ca 67°-70°N): Local versus long-distance sediment transport. Quaternary Science Reviews, Vol. 29, pp. 2619-2632. doi:10.1016/j.quascirev.2010.06.001

Quantitative X-Ray Diffraction (qXRD) analysis of the <2 mm sediment fraction from surface (sea floor) samples, and marine sediment cores that span the last 10-12 cal ka BP, are used to describe spatial and temporal variations in non-clay mineral compositions for an area between Kangerlussuaq Trough and Scoresby Sund (~67°-70°N), East Greenland. Bedrock consists primarily of an early Tertiary alkaline complex with high weight% of pyroxene and plagioclase. Farther inland and to the north, the bedrock is dominantly felsic with a high fraction of quartz and potassium feldspars. Principal Component (PC) analysis of the non-clay sediment compositions indicates the importance of quartz and pyroxene as compositional end members, with an abrupt shift from quartz and k-feldspar dominated sediments north of Scoresby Sund to sediments rich in pyroxene and plagioclase feldspars offshore from the early Tertiary basaltic outcrop. Coarse (<2 mm or <1 mm) ice-rafted sediments are largely absent from the trough sediments between ~8 and 5 cal ka BP, but then increase in the last 4 cal ka BP. Compositional unmixing of the sediments in Grivel Basin and Kangerlussuaq Trough indicate the dominance of local over long distance sediment sources, with pulses of sediment from tidewater glaciers in Kangerlussuaq and Nansen fjords reaching the inner shelf during the Neoglaciation. The change in IRD is more dramatic in the sediment grain-size proxies than in the quartz wt%. Forty to seventy percent of the variance in the quartz records from either side of Denmark Strait is explained by low frequency trends, but the data from the Grivel Basin, East Greenland, are distinctly different, with an approximate 2500 yr periodicity. STUDY NOTES: Estimated weight % of non-clay and clay minerals in the < 2 mm size fraction using the method described by Eberl (2003, 2004) (www.mail-archive.com/rietveld_l@ill.fr/msg02371.html). Figures 1 and 2 show the regional and local setting for the study; data for core locations (Fig. 2) are detailed in Table 1. Table 2 lists the quantitative X-ray diffraction non-clay and clay weight % data for source areas in a series of worksheets; Table 3 consists of a series of worksheets that list the down core mineralogy of a series of cores along a north to south transect (Grivel Basin, Nansen Trough, and Kangerlussuaq Trough). For each depo-center the data are listed by depth. Depth/age models, based on AMS radiocarbon dates, are available, and the sources are listed in Table 1.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2010/andrews2010.xls GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andrews2010/andrews2010.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11