# Central Pacific ODP865 d18O and Mg/Ca Analyses from the Paleocene-Eocene Thermal Maximum #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: http://www.ncdc.noaa.gov/paleo/study/17397 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kozdon2013/kozdon2013-mgsr.txt # # Archive: Paleoceanography #--------------------------------------- # Contribution_Date # Date: 2014-11-05 #--------------------------------------- # Title # Study_Name: Central Pacific ODP865 d18O and Mg/Ca Analyses from the Paleocene-Eocene Thermal Maximum #--------------------------------------- # Investigators # Investigators: Kozdon, R.; Kelly, D.C.; Kitajima, K.; Strickland, A.; Fournelle, J.H.; Valley, J.W. #--------------------------------------- # Description and Notes # Description: In situ oxygen isotope data were acquired between January and March 2011 in the WiscSIMS Laboratory at UW-Madison by a CAMECA ims-1280 large radius ion microprobe. A 133Cs+ primary ion beam with an intensity of ~1.6 nA was focused to a diameter of ~10 µm. For smaller domains, a 133Cs+ primary ion beam with an intensity of ~30 pA was focused to a diameter of ~3 µm. Charging of the sample surface was compensated by Au-coating and an electron flood gun. Grains of UWC-3 calcite standard (d18O = 12.49 per mill V-SMOW, Kozdon et al. 2009) were cast in the center of each epoxy mount. Four to five consecutive measurements of UWC-3 calcite standard were performed before and after every set of up to 15 sample analyses. SIMS analyses for minor and major element concentrations were performed using a primary O- ion beam, with an intensity of 1 nA, focused to a ~ 1.5 µm beam spot size. Further, Mg/Ca measurements in small domains were performed on the CAMECA SX51 electron microprobe at the UW-Madison Department of Geoscience. #--------------------------------------- # Publication # Authors: Kozdon, R., D.C. Kelly, K. Kitajima, A. Strickland, J.H. Fournelle, and J.W. Valley # Published_Date_or_Year: 2013 # Published_Title: In situ d18O and Mg/Ca Analyses of Diagenetic and Planktic Foraminiferal Calcite Preserved in a Deep-Sea Record of the Paleocene-Eocene Thermal Maximum # Journal_Name: Paleoceanography # Volume: 28 # Issue: # Pages: 517-528 # Report Number: # DOI: 10.1002/palo.20048 # Abstract: We report d18O and minor element (Mg/Ca, Sr/Ca) data acquired by high-resolution,in situ secondary ion mass spectrometry (SIMS) from planktic foraminiferal shells and 100–500 µm sized diagenetic crystallites recovered from a deep-sea record (ODP Site 865) of the Paleocene-Eocene thermal maximum (PETM). The d18O of crystallites (~1.2‰ Pee Dee Belemnite (PDB)) is ~4.8‰ higher than that of planktic foraminiferal calcite ( 3.6‰ PDB), while crystallite Mg/Ca and Sr/Ca ratios are slightly higher and substantially lower than in planktic foraminiferal calcite, respectively. The focused stratigraphic distribution of the crystallites signals an association with PETM conditions; hence, we attribute their formation to early diagenesis initially sourced by seafloor dissolution (burndown) ensued by reprecipitation at higher carbonate saturation. The Mg/Ca ratios of the crystallites are an order of magnitude lower than those predicted by inorganic precipitation experiments, whichmay reflect a degree of inheritance from“donor” phases of biogenic calcite that underwent solution in the sediment column. In addition, SIMS d18O and electron microprobe Mg/Ca analyses that were taken within a planktic foraminiferal shell yield parallel increases along traverses that coincide with muricae blades on the chamber wall. The parallel d18O and Mg/Ca increases indicate a diagenetic origin for the blades, but their d18O value ( 0.5‰ PDB) is lower than that of crystallites suggesting that these two phases of diagenetic carbonate formed at different times. Finally, we posit that elevated levels of early diagenesis acted in concert with sediment mixing and carbonate dissolution to attenuate the d18O decrease signaling PETM warming in “wholeshell” records published for Site 865. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: National Science Foundation # Grant: 1131516, 1053466 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Wisconsin Alumni Research Foundation # Grant: #--------------------------------------- # Site Information # Site_Name: ODP865 # Location: Central Pacific Ocean # Country: # Northernmost_Latitude: 18.44 # Southernmost_Latitude: 18.44 # Easternmost_Longitude: -179.556 # Westernmost_Longitude: -179.556 # Elevation: 1528.3 #--------------------------------------- # Data_Collection # Collection_Name: ODP865 Sr and Mg Koz13 # First_Year: 55200000 # Last_Year: 48800000 # Time_Unit: cal yrs BP # Core_Length: # Notes: Core depths [Bralower and Mutterlose, 1995] and ages [Berggren et al., 1995] assigned to various nannofossil biostratigraphic datums were applied to calculate linear sedimentation rates that were, in turn, used to construct a chronostratigraphic framework for the samples. #--------------------------------------- # Chronology: # Age Model of ODP Site 865, PETM Section. Sample core depths, assigned calcareous nannofossil zones, and estimated ages. Core depths [Bralower and Mutterlose, 1995] and ages [Berggren et al., 1995] assigned to various nannofossil biostratigraphic datums were applied to calculate linear sedimentation rates that were, in turn, used to construct a chronostratigraphic framework for the samples. # Depth [mbsf] Age [Ma] Nannofossil Zone Hole Section Interval [cm] # 77.20 48.800 NP14a 865B 9H-2 70-72 # 78.20 49.180 NP14a 865B 9H-3 20-22 # 78.70 49.360 NP14a 865B 9H-3 70-72 # 79.60 49.700 NP14a 865B 9H-4 10-12 # 80.20 49.850 NP13 865B 9H-4 70-72 # 80.70 49.980 NP13 865B 9H-4 120-125 # 81.70 50.230 NP13 865B 9H-5 70-72 # 82.56 50.440 NP13 865B 9H-6 6-11 # 85.33 51.350 NP12 865B 10H-2 83-85 # 86.60 51.800 NP12 865B 10H-3 60-62 # 87.54 52.130 NP12 865B 10H-3 4-6 # 91.10 53.250 NP11 865B 10H-5 60-62 # 94.20 53.950 NP10 865B 11H-1 20-22 # 97.85 54.430 NP10 865B 11H-3 85-89 # 98.70 54.540 NP10 865B 11H-4 20-22 # 100.50 54.730 NP10 865C 12H-2 70-72 # 101.30 54.830 NP10 865C 12H-3 0-2 # 101.60 54.860 NP10 865C 12H-3 30-32 # 102.00 54.910 NP10 865C 12H-3 70-72 # 102.40 54.960 NP10 865C 12H-3 110-112 # 102.60 54.990 NP10 865C 12H-3 130-132 # 102.75 55.006 NP9 865C 12H-3 146-149 # 102.87 55.017 NP9 865C 12H-4 6-8 # 102.89 55.019 NP9 865C 12H-4 9-10 # 102.90 55.020 NP9 865C 12H-4 10-12 # 103.00 55.029 NP9 865C 12H-4 20-22 # 103.10 55.038 NP9 865C 12H-4 30-32 # 103.50 55.073 NP9 865C 12H-4 70-72 # 103.70 55.091 NP9 865C 12H-4 90-92 # 104.00 55.118 NP9 865C 12H-4 120-122 # 104.20 55.136 NP9 865C 12H-4 140-142 # 104.28 55.143 NP9 865C 12H-4 146-149 # 104.30 55.145 NP9 865C 12H-5 0-2 # 105.00 55.207 NP9 865C 12H-5 70-72 #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## depth_mbsf depth,,,meter,,,,,N ## age_Ma age,,,million years BP,,,,,N ## AnalysisNum consequtive analysis number during this session,,,,,Paleoceanography,,,N ## SampleID Sample ID,,, ,,Paleoceanography,,,C ## 24Mg_ppm Magnesium concentration,carbonate/foraminifera,,ppm,,Paleoceanography,in situ measurements by SIMS (10 um beam-spot size).,analytical technique: Secondary Ion Mass Spectrometry (SIMS),N ## 24Mg_ppm_err Magnesium concentration,carbonate/foraminifera,Internal error of a single analysis calculated as the standard error of the mean of 5 cycles,percent,,Paleoceanography,in situ measurements by SIMS (10 um beam-spot size).,analytical technique: Secondary Ion Mass Spectrometry (SIMS),N ## 88Sr_ppm Strontium concentration,carbonate/foraminifera,,ppm,,Paleoceanography,in situ measurements by SIMS (10 um beam-spot size).,analytical technique: Secondary Ion Mass Spectrometry (SIMS),N ## 88Sr_ppm_err Strontium concentration,carbonate/foraminifera,Internal error of a single analysis calculated as the standard error of the mean of 5 cycles,percent,,Paleoceanography,in situ measurements by SIMS (10 um beam-spot size).,analytical technique: Secondary Ion Mass Spectrometry (SIMS),N ## notes notes,,,,,Paleoceanography,,,C # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NaN depth_mbsf age_Ma AnalysisNum SampleID 24Mg_ppm 24Mg_ppm_err 88Sr_ppm 88Sr_ppm_err notes 103.60 55.120 101 Cement #1-1 2005 0.4% 161 1.8% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 102 Cement #1-2 1937 0.4% 88 0.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 103 Cement #1-3 684 0.2% 53 3.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 104 Cement #1-4 1608 0.5% 65 0.8% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 105 Cement #1-5 997 0.1% 69 1.5% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 106 Cement #1-6 1542 1.1% 77 1.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 107 Cement #1-7 1436 1.8% 169 0.7% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 108 Cement #1-8 1232 0.4% 55 2.8% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 109 Cement #2-1 779 0.7% 163 2.2% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 110 Cement #2-2 1582 1.3% 158 2.3% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 111 Cement #2-3 2358 0.2% 249 0.9% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 112 Cement #2-4 961 0.5% 36 1.4% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 113 Cement #2-5 1241 0.4% 29 2.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 114 Cement #2-6 1888 0.4% 82 0.9% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 115 Cement #2-7 2107 0.4% 182 2.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 116 Cement #2-8 1916 0.3% 86 1.1% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 117 Cement #2 - cemented shell-1 1035 3.1% 585 0.9% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 118 Cement #2 - cemented shell-2 1168 1.5% 690 0.5% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 119 Cement #2 - cemented shell-3 1263 1.6% 671 2.9% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 120 Cement #2 - cemented shell-4 1075 0.5% 439 1.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 121 Cement #2-9 599 0.3% 25 1.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 122 Cement #2-10 1241 1.1% 60 2.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 123 Cement #2-11 2384 0.6% 181 1.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 124 Cement #2-12 2338 0.4% 197 0.7% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 125 Cement #2-13 1622 1.2% 118 1.4% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 126 Cement #2 - cemented shell-5 1469 0.8% 309 3.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 127 Cement #8 - cemented shell-1 1771 0.4% 798 1.1% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 128 Cement #8 - cemented shell-2 1811 3.7% 545 1.7% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 129 Cement #8-1 1063 0.3% 84 4.2% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 130 Cement #8 - cemented shell-3 1021 0.5% 496 1.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 131 Cement #8 - cemented shell-4 1771 1.8% 600 0.5% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 132 Cement #8-2 1608 0.7% 96 2.3% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 133 Cement #8-3 916 1.1% 162 0.7% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 134 Cement #8-4 587 0.8% 20 1.3% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 135 Cement #8-5 1928 0.6% 129 0.9% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 136 Cement #8-6 2173 0.5% 167 2.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 137 Cement #8 - cemented shell-5 1352 0.4% 691 0.4% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 138 Cement #8 - cemented shell-6 2008 2.3% 593 0.8% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 139 Cement #8-7 1559 0.6% 32 1.2% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 140 Cement #8-8 1856 0.4% 21 2.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 141 Cement #8-9 1520 0.4% 22 1.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 142 Cement #8-10 1152 0.4% 26 1.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 143 Cement #8-11 1159 1.1% 68 4.1% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 144 Cement #9-1 1075 1.2% 35 2.9% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 145 Cement #9 - cemented shell-1 1663 6.0% 830 1.4% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 146 Cement #9 - cemented shell-2 1535 1.0% 725 1.6% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 147 Cement #3 - cemented shell-1 1392 0.4% 805 1.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 148 Cement #3-1 789 0.3% 128 0.9% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 149 Cement #3-2 633 0.3% 26 2.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 150 Cement #3-3 658 0.4% 189 2.0% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 151 Cement #3 - cemented shell-2 1174 0.7% 1045 0.3% 865B Section: 12-1 Interval[cm]: 10-12 103.60 55.120 152 Cement #3-4 1496 0.2% 98 0.4% 865B Section: 12-1 Interval[cm]: 10-12