# Greenland Stream Sediment Sr-Nd-Pb Isotope Geochemistry #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # # Online_Resource: http://www.hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:16436 # # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/reyes2014/reyes2014stream.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleoceanography #-------------------- # Contribution_Date # Date: 2014-05-13 #-------------------- # Title # Study_Name: Greenland Stream Sediment Sr-Nd-Pb Isotope Geochemistry #-------------------- # Investigators # Investigators: Reyes, A.V.; Carlson, A.E.; Beard, B.L.; Hatfield, R.G.; Stoner, J.S.; Winsor, K.; Welke, B.; Ullman, D.J. #-------------------- # Description_and_Notes # Description: Sr-Nd-Pb isotope composition of stream sediment and glaciolacustrine silt from southwest Greenland, used to constrain mean isotope composition of subglacially-eroded silt on south Greenland's Precambrian bedrock terranes. Updated from Colville, E.J., Carlson, A.E., Beard, B.L., Hatfield, R.G., Stoner, J.S., Reyes, A.V., Ullman, D.J. (2011) Sr-Nd-Pb isotope evidence for ice-sheet presence on southern Greenland during the last interglacial. Science 333: 620-623. DOI: 10.1126/science.1204673 # #Sample: * indicates samples previously reported in Colville, E.J., Carlson, A.E., Beard, B.L., Hatfield, R.G., Stoner, J.S., Reyes, A.V., Ullman, D.J. (2011) Sr-Nd-Pb isotope evidence for ice-sheet presence on southern Greenland during the last interglacial. Science 333: 620-623. DOI: 10.1126/science.1204673 # #Terrane Abbreviations: # NMB Nagssugtoqidian Mobile Belt # AB Archean Block # KMB Ketilidian Mobile Belt # #Sediment-type abbreviation: # S silt from low-energy fluvial environments # L glaciolacustrine sediment # I iceberg debris # D diamicton # #-------------------- # Publication # Authors: Alberto V. Reyes, Anders E. Carlson, Brian L. Beard, Robert G. Hatfield, Joseph S. Stoner, Kelsey Winsor, Bethany Welke, and David J. Ullman # Published_Date_or_Year: 2014-06-26 # Published_Title: South Greenland ice-sheet collapse during Marine Isotope Stage 11 # Journal_Name: Nature # Volume: 510 # Edition: # Issue: 7506 # Pages: 525-528 # DOI: 10.1038/nature13456 # Online_Resource: http://www.nature.com/nature/journal/v510/n7506/full/nature13456.html # Full_Citation: # Abstract: Varying levels of boreal summer insolation and associated Earth system feedbacks led to differing climate and ice-sheet states during late-Quaternary interglaciations. In particular, Marine Isotope Stage (MIS) 11 was an exceptionally long interglaciation and potentially had a global mean sea level 6 to 13 metres above the present level around 410,000 to 400,000 years ago, implying substantial mass loss from the Greenland ice sheet (GIS). There are, however, no model simulations and only limited proxy data to constrain the magnitude of the GIS response to climate change during this 'super interglacial', thus confounding efforts to assess climate/ice--sheet threshold behaviour and associated sea-level rise. Here we show that the south GIS was drastically smaller during MIS11 than it is now, with only a small residual ice dome over southernmost Greenland. We use the strontium-neodymium-lead isotopic composition of proglacial sediment discharged from south Greenland to constrain the provenance of terrigenous silt deposited on the Eirik Drift, a sedimentary deposit off the south Greenland margin. We identify a major reduction in sediment input derived from south Greenland's Precambrian bedrock terranes, probably reflecting the cessation of subglacial erosion and sediment transport as a result of near-complete deglaciation of south Greenland. Comparison with ice-sheet configurations from numerical models suggests that the GIS lost about 4.5 to 6 metres of sea-level-equivalent volume during MIS11. This is evidence for late-Quaternary GIS collapse after it crossed a climate/ice-sheet stability threshold that may have been no more than several degrees above pre-industrial temperatures. #------------------ # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: ARC-0902571, ARC-0902751 #------------------ # Site_Information # Site_Name: NL-11-01 # Location: North America>Greenland # Country: # Northernmost_Latitude: 65.07 # Southernmost_Latitude: 65.07 # Easternmost_Longitude: -50.92 # Westernmost_Longitude: -50.92 # Elevation: #------------------ # Data_Collection # Collection_Name: Reyes2014stream # Earliest_Year: -50 # Most_Recent_Year: -60 # Time_Unit: Cal. Year BP # Core_Length: # Notes: #------------------ # Chronology: #---------------- # Variables # # Data variables follow (have no #) # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## sample sample field code, , , , , , , , C ## sed_type sediment description, , , , , , , , C ## terrane geological terrane, , , , , , , , C ## lat_N latitude, , , degrees N, , , , , N ## lat_W longitude, , , degrees W, , , , , N ## Sr_ppm Sr concentration, CaCO3-free silt, , ppm, , , , isotope dilution, N ## Rb_ppm Rb concentration, CaCO3-free silt, , ppm, , , , isotope dilution, N ## 87Rb/86Sr 87Rb/86Sr, CaCO3-free silt, , , , , , , N ## 87Sr/86Sr 87Sr/86Sr, CaCO3-free silt, , , , , , TIMS, N ## 87Sr/86S_2SE 2x std-error on 87Sr/86Sr, CaCO3-free silt, , , , , , TIMS, N ## Nd_ppm Nd concentration, CaCO3-free silt, , ppm, , , , isotope dilution, N ## Sm_ppm Sm concentration, CaCO3-free silt, , ppm, , , , isotope dilution, N ## 147Sm/144Nd 147Sm/144Nd, CaCO3-free silt, , , , , , , N ## 143Nd/144Nd 143Nd/144Nd, CaCO3-free silt, , , , , , TIMS, N ## 143Nd/144Nd 2x std-error on 143Nd/144Nd, CaCO3-free silt, , , , , , TIMS, N ## eNd epsilon Nd, CaCO3-free silt, , epsilon units relative to CHUR 143/144 Nd, , , , , N ## 206Pb/204Pb 206Pb/204Pb, CaCO3-free silt, , , , , , TIMS, N ## 207Pb/204Pb 207Pb/204Pb, CaCO3-free silt, , , , , , TIMS, N ## 208Pb/204Pb 208Pb/204Pb, CaCO3-free silt, , , , , , TIMS, N #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: -999 sample sed_type terrane lat_N long_W Sr_ppm Rb_ppm 87Rb/86Sr 87Sr/86Sr 87Sr/86Sr_2SE Nd_ppm Sm_ppm 147Sm/144Nd 143Nd/144Nd 143Nd/144Nd_2SE eNd 206Pb/204Pb 207Pb/204Pb 208Pb/204Pb *Na01-08 S KMB 61.17 45.40 517 111.8 0.6250 0.718350 0.000010 53.2 8.9 0.0936 0.511509 0.000007 -22.0 22.249 15.907 38.888 Na01-10 S KMB 61.22 45.30 516 107.4 0.6033 0.717699 0.000009 52.9 9.0 0.1025 0.511503 0.000008 -22.1 22.289 15.897 38.717 *Na02-08 S KMB 61.22 45.30 460 110.6 0.6953 0.716310 0.000010 50.8 9.4 0.1031 0.511515 0.000009 -21.9 22.872 15.961 39.102 Na02-10 S KMB 61.22 45.30 491 90.2 0.5326 0.716278 0.000010 58.6 9.9 0.1021 0.511504 0.000007 -22.1 22.657 15.935 38.920 *Na03-08 S KMB 61.21 45.32 476 44.5 0.2704 0.716580 0.000010 66.7 11.4 0.0955 0.511532 0.000007 -21.6 23.835 16.071 39.578 *Na04-08 S KMB 61.20 45.36 496 102.7 0.5993 0.717930 0.000010 58.9 9.9 0.0936 0.511500 0.000007 -22.2 22.253 15.910 38.944 Na05-10 S KMB 61.09 45.26 665 62.4 0.2714 0.708922 0.000009 57.2 9.9 0.1045 0.511748 0.000008 -17.4 21.779 15.849 39.091 Na06-08 S KMB 61.20 45.52 577 85.8 0.4305 0.712708 0.000010 52.2 8.8 0.1016 0.511680 0.000008 -18.7 20.474 15.718 38.283 *Na08-08 S KMB 61.15 45.52 502 144.5 0.8334 0.717290 0.000010 158.9 26.8 0.0939 0.511858 0.000007 -15.2 20.733 15.741 39.748 Nq11-05 S KMB 61.08 46.18 604 83.4 0.4000 0.712411 0.000009 34.5 5.8 0.1017 0.511429 0.000008 -23.6 18.791 15.529 37.220 Nq11-07 S KMB 61.08 46.18 592 82.6 0.4037 0.712676 0.000010 31.7 5.4 0.1029 0.511435 0.000007 -23.5 18.566 15.484 36.989 Nq11-11 L KMB 61.08 46.32 590 82.4 0.4039 0.713137 0.000012 46.7 8.0 0.1035 0.511441 0.000008 -23.4 21.195 15.751 38.503 Nq11-15 S KMB 61.06 46.33 610 64.8 0.3076 0.711059 0.000010 41.2 7.3 0.1069 0.511498 0.000007 -22.2 20.758 15.695 37.872 *Qq04-08 S KMB 60.75 46.09 330 98.3 0.8616 0.720920 0.000010 34.8 15.8 0.2534 0.511028 0.000007 -31.4 20.667 15.764 38.749 BH-11-03 S AB 64.11 50.11 347 32.4 0.2704 0.715696 0.000010 18.4 3.4 0.1109 0.511047 0.000009 -31.0 14.912 14.575 35.029 Kp11-01 I AB 64.47 50.18 328 28.1 0.2487 0.715880 0.000009 19.4 3.6 0.1123 0.511043 0.000007 -31.1 15.675 14.659 35.192 Kp11-02 I AB 64.47 50.18 337 33.6 0.2885 0.716788 0.000008 16.8 3.1 0.1105 0.511041 0.000009 -31.2 14.742 14.512 34.958 Kp11-03 I AB 64.47 50.18 310 39.9 0.3729 0.720129 0.000008 16.3 2.9 0.1089 0.510958 0.000006 -32.8 14.450 14.400 35.471 Mn11-03 S AB 65.55 51.89 319 46.5 0.4224 0.727575 0.000011 24.9 4.6 0.1108 0.510805 0.000006 -35.8 14.692 14.391 35.197 NL-11-01 L AB 65.07 50.92 314 71.3 0.6575 0.733156 0.000010 16.3 3.2 0.1194 0.510957 0.000007 -32.8 14.904 14.562 34.979 Nu-iceberg I AB 64.17 51.77 325 43.8 0.3909 0.726286 0.000009 13.4 2.9 0.1299 0.511316 0.000008 -25.8 14.973 14.418 34.372 *Nu01-08 S AB 64.17 51.66 307 41.3 0.3896 0.726400 0.000010 14.0 2.9 0.1161 0.511240 0.000007 -27.3 15.264 14.512 34.663 *Nu02-08 S AB 64.17 51.66 304 39.1 0.3717 0.723310 0.000010 15.7 3.2 0.1149 0.511189 0.000008 -28.3 15.235 14.518 34.718 *Nu04-08 S AB 64.19 51.73 238 42.6 0.5175 0.726690 0.000010 53.2 7.9 0.0831 0.510545 0.000007 -40.8 16.837 15.072 37.463 Nu04-10 S AB 64.18 51.63 241 59.6 0.7170 0.727251 0.000008 21.2 3.8 0.1085 0.511127 0.000007 -29.5 19.302 15.397 38.994 Nu05-10 D AB 64.18 51.66 267 69.6 0.7564 0.738501 0.000010 15.0 2.9 0.1168 0.510980 0.000008 -32.3 14.957 14.278 35.138 Pa11-10 L AB 62.16 49.81 344 35.6 0.2994 0.717020 0.000009 12.6 2.4 0.1160 0.511152 0.000007 -29.0 15.176 14.559 34.544 Pa14-10 S AB 62.08 48.82 344 33.5 0.2826 0.717451 0.000009 16.4 3.3 0.1222 0.511268 0.000008 -26.7 17.599 15.022 36.106 Pa16-10 S AB 62.07 48.84 338 34.0 0.2905 0.717702 0.000007 16.1 3.1 0.1158 0.511146 0.000007 -29.1 17.095 14.926 35.660 *08ICE-4A L NMB 69.23 49.99 359 82.1 0.6613 0.731400 0.000010 21.0 3.9 0.1038 0.511134 0.000007 -29.3 17.578 15.215 37.302 BH-11-02 S NMB 69.43 50.45 301 81.9 0.7911 0.737928 0.000010 22.1 3.8 0.1046 0.510932 0.000008 -33.3 16.044 14.939 37.917 *Kn01-09 S NMB 67.02 50.65 408 28.6 0.2025 0.713220 0.000010 33.5 5.0 0.0826 0.511025 0.000007 -31.5 15.066 14.823 36.687 *Kn02-08 S NMB 67.01 50.48 343 21.0 0.1775 0.712060 0.000010 33.6 5.4 0.0893 0.510750 0.000060 -36.8 17.407 15.171 39.702 *Kn03-08 S NMB 67.02 50.67 420 27.6 0.1900 0.712450 0.000010 26.9 4.4 0.0914 0.510845 0.000007 -35.0 14.813 14.765 36.025 *Kn03-09 S NMB 67.01 50.48 366 24.9 0.1969 0.712600 0.000010 35.6 5.8 0.0908 0.510804 0.000008 -35.8 16.658 15.118 37.861 *Kn04-09 S NMB 67.09 50.24 621 29.6 0.1375 0.707400 0.000010 55.0 9.0 0.0910 0.511150 0.000007 -29.0 17.009 15.281 37.466 *Kn05-09 S NMB 67.16 50.13 440 16.9 0.1107 0.707970 0.000010 35.6 6.1 0.0958 0.511028 0.000007 -31.4 17.509 15.259 38.404 *Kn05-08 S NMB 67.01 50.69 562 35.0 0.1797 0.712110 0.000010 38.1 6.4 0.0939 0.510895 0.000010 -34.0 -999.000 -999.000 -999.000 *Kn06-08 S NMB 67.09 50.24 436 29.9 0.1981 0.713240 0.000010 21.9 4.1 0.1055 0.511122 0.000009 -29.6 -999.000 -999.000 -999.000 Kn11-03 S NMB 66.99 50.54 406 30.4 0.2164 0.713014 0.000008 30.1 4.8 0.0958 0.510771 0.000007 -36.4 14.483 14.699 36.050 KT-134-140 L NMB 68.73 50.69 389 64.5 0.4808 0.722241 0.000009 17.0 2.9 0.1030 0.510983 0.000007 -32.3 16.531 15.069 36.750 Qa11-01 S NMB 68.62 50.84 373 68.9 0.5350 0.721582 0.000009 33.0 5.3 0.0977 0.510850 0.000007 -34.9 18.143 15.327 39.113 Qa11-03 S NMB 68.62 50.84 380 58.5 0.4459 0.720469 0.000009 30.4 5.2 0.1046 0.510953 0.000010 -32.9 17.997 15.311 38.305 Qa11-04 S NMB 68.73 50.95 343 73.0 0.6162 0.722458 0.000012 68.0 10.2 0.0904 0.510763 0.000008 -36.6 20.793 15.570 45.131 Qa11-05 I NMB 68.77 51.24 371 53.1 0.4149 0.718737 0.000009 29.5 5.0 0.1022 0.510962 0.000010 -32.7 17.954 15.301 38.273 *Sm01-09 S NMB 66.92 53.65 699 18.5 0.0765 0.706730 0.000010 41.5 7.0 0.0939 0.511207 0.000008 -27.9 15.902 15.085 36.414 *Sm02-09 S NMB 66.92 53.13 355 15.2 0.1235 0.707090 0.000010 68.6 11.8 0.0958 0.511445 0.000006 -23.3 16.376 15.179 37.220 *Sm04-09 S NMB 66.94 53.61 362 23.6 0.1884 0.713630 0.000010 28.6 6.0 0.1175 0.510984 0.000007 -32.3 17.127 15.187 38.054 Ta12-10 S NMB 65.63 37.78 1244 15.3 0.0355 0.704759 0.000009 117.5 19.4 0.1002 0.511294 0.000006 -26.2 16.923 15.371 37.131 Ta13-10 S NMB 65.65 37.83 802 27.6 0.0994 0.706557 0.000007 117.0 18.7 0.0967 0.511273 0.000008 -26.6 17.373 15.473 40.424 Ta14-10 S NMB 65.65 37.77 1016 11.1 0.0316 0.704989 0.000010 112.5 15.9 0.0853 0.511102 0.000008 -30.0 -999.000 -999.000 -999.000