# West Greenland Trough-Mouth Fan Sedimentary Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using these data, # If there is no publication information, please cite investigator, title, online resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/14768 # # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/ocofaigh2013/ocafaigh2013-vc46-source.txt # # Archive: Paleoceanography #-------------------- # Contribution_Date # Date: 2013-08-12 #-------------------- # Title # Study_Name: West Greenland Trough-Mouth Fan Sedimentary Data #-------------------- # Investigators # Investigators: Ó Cofaigh, C.; Andrews, J.T.; Jennings, A.E.; Dowdeswell, J.A.; Hogan, K.A.; Kilfeather A.A.; Sheldon, C. #-------------------- # Description_and_Notes # #-------------------- # Publication # Authors: C. Ó Cofaigh, J.T. Andrews, A.E. Jennings, J.A. Dowdeswell, K.A. Hogan, A.A. Kilfeather and C. Sheldon # Published_Date_or_Year: 2013 # Published_Title: Glacimarine lithofacies, provenance and depositional processes on a West Greenland trough-mouth fan # Journal_Name: Journal of Quaternary Science # Volume: 28 # Issue: 1 # Pages: 13-26 # DOI: 10.1002/jqs.2569 # Abstract: Along the West Greenland continental margin adjoining Baffin Bay, bathymetric data show a series of large submarine fans located at the mouths of cross-shelf troughs. One of these fans, termed here ‘Uummannaq Fan’, is a trough-mouth fan built largely by debris delivered from a fast-flowing outlet of the Greenland Ice Sheet during past glacial maxima. Cores from this fan provide the first information on glacimarine sedimentary facies within a major West Greenland trough-mouth fan and on the nature of Late Weichselian–Holocene glacigenic sediment delivery to this region of the Baffin Bay margin. Glacigenic debris flows deposited on the upper slope and extending to at least 1800 m water depth in front of the trough-mouth are related to the remobilization of subglacial debris that was delivered onto the upper slope at times when an ice stream was positioned at the shelf edge. In contrast, sedimentary facies from the northern sector of the fan are characterized by hemipelagic and ice-rafted sediments and turbidites; glacigenic debris flows are notably absent in cores from this region. Quantitative X-ray diffraction studies of the <2-mm sediment fraction indicate that the bulk of the sediment in the fan is derived from Uummannaq Trough but there are distinct intervals when sediment from northern Baffin Bay sources dominates, especially on the northern limit of the fan. These data demonstrate considerable variation in the nature of sediment delivery across the Uummannaq Fan when the Greenland Ice Sheet was at the shelf edge. They highlight the variability of glacimarine depositional processes operating on trough-mouth fans on high-latitude continental margins during the last glacial maximum and indicate that glacigenic debris flows are just one of a number of mechanisms by which such large depocentres form. # #--------------------- # Site_Information # Site_Name: JR175-VC46 # Location: North Atlantic Ocean # Northernmost_Latitude: 70.468833 # Southernmost_Latitude: 70.468833 # Easternmost_Longitude: -61.0485 # Westernmost_Longitude: -61.0485 # Elevation: -845 #------------------ # Data_Collection # Core_Name: JR175-VC46 two-source # First_Year: # Last_Year: # Time_Unit: # Core_Length: 564 cm # Notes: Supporting information # Table S3. Varimax factor loadings # Factor_1 Factor_2 Factor_3 Communality Unique Vmax_Factor_1 Vmax_Factor_2 Vmax_Factor_3 V_Max_Communality # EigenValues 2.21 1.52 1.33 # Variance(%) 27.57 19.06 16.59 # Variance(Cum. %) 27.57 46.63 63.22 # - # Quartz 0.68 0.37 0.04 0.60 0.40 0.42 0.64 -0.14 0.60 # Oligoclase feldspar (Norway) -0.28 -0.24 -0.59 0.49 0.51 0.00 -0.56 -0.41 0.49 # Labradorite feldspar 0.11 0.23 -0.73 0.60 0.40 0.16 -0.06 -0.76 0.60 # Fe-Dolomite 0.06 -0.51 0.54 0.56 0.44 0.15 -0.15 0.71 0.56 # Amphibole (ferrotschermakite) -0.77 -0.14 -0.19 0.65 0.35 -0.57 -0.56 -0.10 0.65 # Pyroxene (diopside) 0.11 0.83 0.15 0.73 0.27 -0.30 0.76 -0.25 0.73 # 1M illite (R>1, 70-80%I) -0.76 0.24 0.26 0.70 0.30 -0.83 -0.08 0.12 0.70 # Biotite (1M) -0.68 0.49 0.16 0.73 0.27 -0.84 0.10 -0.09 0.73 # #------------------ # Chronology # Core Sample depth(cm) Lab. code Material 14C age Corrected 14C age 1 or 2 sigma Cal BP range Relative probability Calibrated age # VC46 120–121 NSRL-20849 Cassidulina neoteretis 12,770 12,370 1 14,152–13,996 1 # 2 14,245–13,882 0.97 14,060 # # Conventional radiocarbon age, i.e. the measured radiocarbon age corrected for isotopic fractionation, calculated using d13C. Corrected 14C age is # conventional radiocarbon age minus 400 years (marine reservoir effect). All calibrations were carried out using the Marine 09.14c dataset and Calib 6.0. # A DR of 140 years +/-25 was applied to the West Greenland dates based on http://calib.qub.ac.uk/marine/ and McNeely et al. (2006). Calibrated # ages are the mean of the 2d calibrated age range and have been rounded to the nearest 10 years. #------------------ # Variables # # Data line variables format: Variables list, one per line, shortname-tab- 9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## depth_cm Depth, , , cm, , , , ,N ## frac-V233 fraction similar to VC43-233,,, ,,,,,N ## frac-V233_err fraction similar to VC43-233, 1s error,, ,,,,,N ## frac-Baff fraction similar to Baffin Is.,,, ,,,,,N ## frac-Baff_err fraction similar to Baffin Is., 1s error,, ,,,,,N ## frac-total fraction similar to both sources,,, ,,,,,N ## frac-unexp unexplained fraction,by VC43-233 and Baffin Is.,, ,,,,,N ## DOF-2-source degree of fit,VC43-233 and Baffin Is. , , , , , , ,N ## abs_ave_dev absolute average deviation,,, ,,,,absolute differences between the known and estimated mineral % divided by the number of mineral species,N ## Vmax_F_Score_1 Vmax Factor score,,, ,,,run 1,using loadings in table S3,N ## Vmax_F_Score_2 Vmax Factor score,,, ,,,run 2,using loadings in table S3,N #----------------- # Data # Missing Value -999 depth_cm frac-V233 frac-V233_err frac-Baff frac-Baff_err frac-total frac-unexp DOF-2-sources abs_ave_dev Vmax_F_Score_1 Vmax_F_Score_2 3 0.58 0.06 0.28 0.04 85.94 14.06 0.53 2.95 -0.63 0.06 7 0.55 0.04 0.34 0.09 88.25 11.75 0.5 2.8 0.23 -0.14 16 0.59 0.09 0.3 0.06 89.54 10.46 0.46 2.58 -0.28 -0.63 22 0.58 0.07 0.33 0.04 91.37 8.63 0.45 2.51 -0.28 -0.42 23 0.5 0.1 0.36 0.11 86.24 13.76 0.42 2.36 -0.29 -0.31 24 0.44 0.06 0.45 0.04 89.41 10.59 0.49 2.73 -0.38 -0.16 24 0.52 0.1 0.36 0.03 87.92 12.08 0.46 2.53 -0.48 -0.21 25 0.52 0.05 0.31 0.03 82.66 17.34 0.43 2.39 -1.13 -0.16 27 0.53 0.06 0.35 0.05 88.19 11.81 0.43 2.38 -0.42 -0.39 28 0.57 0.1 0.3 0.03 86.7 13.3 0.42 2.31 -0.63 -0.27 29 0.47 0.03 0.37 0.07 83.87 16.13 0.44 2.45 -0.7 0.02 30 0.63 0.09 0.36 0.04 98.81 1.19 0.43 2.39 -1.11 0.1 31 0.59 0.1 0.29 0.04 88.29 11.71 0.42 2.31 -0.67 0.09 32 0.42 0.05 0.25 0.13 66.61 33.39 0.55 3.07 -0.61 -0.71 33 0.59 0.04 0.33 0.04 92.56 7.44 0.44 2.44 -0.65 -0.44 34 0.54 0.09 0.44 0.05 97.82 2.18 0.4 2.22 -0.65 0.11 35 0.56 0.06 0.36 0.11 91.98 8.02 0.48 2.67 -0.85 -0.42 41 0.36 0.11 0.4 0.17 76.47 23.53 0.54 3 1.03 -0.42 42 0.51 0.06 0.33 0.11 84.05 15.95 0.47 2.59 -0.46 -0.23 43 0.44 0.11 0.3 0.04 74.3 25.7 0.5 2.79 -0.21 -0.46 46 0.39 0.08 0.46 0.1 85.36 14.64 0.56 3.12 -0.45 -0.48 47 0.57 0.16 0.32 0.18 88.68 11.32 0.52 2.87 -0.15 -0.64 48 0.27 0.04 0.44 0.04 70.87 29.13 0.6 3.34 0.03 -0.64 49 0.49 0.13 0.41 0.11 90.78 9.22 0.45 2.48 -0.62 -0.52 50 0.49 0.11 0.44 0.13 93.5 6.5 0.44 2.44 -0.29 -0.32 51 0.52 0.09 0.37 0.09 89.44 10.56 0.43 2.38 -0.46 -0.27 52 0.37 0.06 0.43 0.08 80.44 19.56 0.52 2.89 1.16 -0.5 56 0.57 0.1 0.33 0.09 89.56 10.44 0.5 2.76 -0.31 -0.48 65 0.47 0.11 0.39 0.15 85.89 14.11 0.48 2.66 -0.41 -0.35 76 0.44 0.08 0.38 0.06 81.77 18.23 0.53 2.93 0.49 -0.57 89 0.6 0.13 0.31 0.15 91.51 8.49 0.47 2.59 -0.1 -0.57 91 0.48 0.08 0.33 0.08 81.12 18.88 0.5 2.77 0.61 -0.66 100 0.5 0.11 0.3 0.08 80.82 19.18 0.51 2.86 0.16 -0.71 111 0.49 0.08 0.37 0.09 86.17 13.83 0.43 2.4 -0.2 -0.69 117 0.36 0.03 0.48 0.04 84.69 15.31 0.41 2.3 -0.7 0.18 121 0.41 0.07 0.44 0.11 84.72 15.28 0.44 2.42 0.29 -0.27 131 0.4 0.09 0.42 0.11 82.32 17.68 0.4 2.23 0.03 -0.34 146 0.52 0.08 0.36 0.1 87.92 12.08 0.4 2.24 -0.46 -0.29 156 0.57 0.06 0.35 0.1 92.35 7.65 0.43 2.4 -0.46 -0.09 171 0.47 0.15 0.39 0.2 86.02 13.98 0.48 2.65 0.66 -0.74 181 0.59 0.07 0.31 0.04 90.07 9.93 0.48 2.67 0.79 -0.85 191 0.61 0.06 0.38 0.03 99.12 0.88 0.41 2.27 -0.48 -0.15 201 0.66 0.1 0.26 0.1 91.86 8.14 0.47 2.63 0.11 -0.86 211 0.74 0.07 0.28 0.09 102.21 -2.21 0.43 2.41 -0.08 -0.38 221 0.73 0.1 0.21 0.1 94.29 5.71 0.47 2.59 -1.66 -0.55 231 0.53 0.08 0.32 0.05 85.2 14.8 0.44 2.47 -1.21 -0.52 241 0.59 0.07 0.34 0.09 92.73 7.27 0.4 2.2 -0.19 -0.45 251 0.6 0.09 0.31 0.1 91.1 8.9 0.47 2.59 0.43 -0.69 261 0.75 0.05 0.19 0.1 94.06 5.94 0.44 2.44 -1.18 -0.22 276 0.61 0.02 0.23 0.06 83.42 16.58 0.35 1.93 0.34 0.31 293 0.36 0.21 0.26 0.17 61.41 38.59 0.71 3.94 1.5 -0.95 313 0.51 0.1 0.31 0.05 82.33 17.67 0.45 2.48 -0.44 -0.47 333 0.67 0.09 0.29 0.08 95.8 4.2 0.45 2.48 -1.27 -0.29 358 0.7 0.05 0.29 0.09 98.71 1.29 0.43 2.38 -0.91 -0.21 358 0.69 0.07 0.26 0.13 94.39 5.61 0.39 2.14 -0.26 -0.05 371 0.66 0.04 0.33 0.06 98.14 1.86 0.38 2.13 -0.54 -0.34 386 0.74 0.06 0.3 0.09 103.6 -3.6 0.41 2.3 -1.08 -0.03 402 0.57 0.06 0.34 0.1 90.95 9.05 0.42 2.33 -0.35 -0.16 541 0.63 0.07 0.34 0.04 96.44 3.56 0.57 3.16 0.31 0.25