# 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-epma.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 EPMA 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 analysis number used during this session,,,,,Paleoceanography,,,N ## SampleID Sample ID,,, ,,Paleoceanography,,,C ## CaO-EPMA CaO,carbonate/foraminifera,, ,,paleoceanography,using Electron Probe Microanalyser (EPMA),,N ## MgO-EPMA MgO,carbonate/foraminifera,, ,,paleoceanography,using Electron Probe Microanalyser (EPMA),,N ## SrO-EPMA SrO,carbonate/foraminifera,, ,,paleoceanography,using Electron Probe Microanalyser (EPMA),,N ## CaO2-EPMA CaO2,carbonate/foraminifera,, ,,paleoceanography,using Electron Probe Microanalyser (EPMA),,N ## oxidetot oxide totals,,,percent,,paleoceanography,,,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 CaO-EPMA MgO-EPMA SrO-EPMA CaO2-EPMA oxidetot notes 102.90 55.020 61 Shell #2 54.34 0.12 NaN 44.29 98.74 Section 12-4 Interval 10-12 Data from Fig. 5f, g: EPMA traverse, chamber wall to muricae blade. Mount ODP 865 (I) shell # 2, Hole 865C, 12-4, 10-12 cm 102.90 55.020 62 Shell #2 54.92 0.11 0.06 44.13 99.22 Section 12-4 Interval 10-12 102.90 55.020 63 Shell #2 54.88 0.09 0.05 44.14 99.17 Section 12-4 Interval 10-12 102.90 55.020 64 Shell #2 54.86 0.12 0.06 44.14 99.18 Section 12-4 Interval 10-12 102.90 55.020 65 Shell #2 54.81 0.18 0.11 44.12 99.23 Section 12-4 Interval 10-12 102.90 55.020 66 Shell #2 54.18 0.11 0.10 44.28 98.69 Section 12-4 Interval 10-12 102.90 55.020 67 Shell #2 55.73 0.13 0.17 43.89 99.92 Section 12-4 Interval 10-12 102.90 55.020 75 Shell #2 56.84 0.13 0.15 43.65 100.77 Section 12-4 Interval 10-12 102.90 55.020 86 Shell #2 56.24 0.22 0.10 43.80 100.36 Section 12-4 Interval 10-12 102.90 55.020 87 Shell #2 53.57 0.33 0.01 44.45 98.36 Section 12-4 Interval 10-12 102.90 55.020 88 Shell #2 53.13 0.40 NaN 44.55 98.08 Section 12-4 Interval 10-12 102.90 55.020 89 Shell #2 55.19 0.49 0.04 44.03 99.76 Section 12-4 Interval 10-12 102.87 55.017 143 Shell #60, infilling 54.75 0.31 NaN 44.18 99.22 Section 12-4 Interval 6-8 Data from Fig. 5b, c: Parallel EPMA traverses, diagenetic infilling of M. allisonensis chamber. Traverse II 102.87 55.017 144 Shell #60, infilling 54.69 0.13 0.01 44.20 99.03 Section 12-4 Interval 6-8 102.87 55.017 145 Shell #60, infilling 54.28 0.23 0.08 44.26 98.85 Section 12-4 Interval 6-8 102.87 55.017 146 Shell #60, infilling 53.65 0.31 0.11 44.39 98.46 Section 12-4 Interval 6-8 102.87 55.017 147 Shell #60, infilling 54.31 0.33 NaN 44.28 98.91 Section 12-4 Interval 6-8 102.87 55.017 148 Shell #60, infilling 53.91 0.28 0.13 44.32 98.64 Section 12-4 Interval 6-8 102.87 55.017 149 Shell #60, infilling 51.90 0.38 0.04 44.84 97.16 Section 12-4 Interval 6-8 102.87 55.017 152 Shell #60, infilling 54.21 0.28 NaN 44.34 98.72 Section 12-4 Interval 6-8 102.87 55.017 153 Shell #60, infilling 54.67 0.25 0.06 44.17 99.16 Section 12-4 Interval 6-8 102.87 55.017 154 Shell #60, infilling 54.04 0.22 0.00 44.35 98.60 Section 12-4 Interval 6-8 102.87 55.017 155 Shell #60, infilling 53.38 0.21 0.05 44.49 98.13 Section 12-4 Interval 6-8 102.87 55.017 156 Shell #60, infilling 54.77 0.07 0.00 44.19 99.03 Section 12-4 Interval 6-8 102.87 55.017 157 Shell #60, infilling 54.22 0.03 0.11 44.28 98.64 Section 12-4 Interval 6-8 102.87 55.017 158 Shell #60, infilling 55.42 0.25 0.06 44.00 99.73 Section 12-4 Interval 6-8 Data fro Fig. 5b, c: Parallel EPMA traverses, diagenetic infilling of M. allisonensis chamber. Traverse I 102.87 55.017 159 Shell #60, infilling 58.36 0.26 0.03 43.35 102.00 Section 12-4 Interval 6-8 102.87 55.017 160 Shell #60, infilling 54.93 0.29 NaN 44.16 99.31 Section 12-4 Interval 6-8 102.87 55.017 161 Shell #60, infilling 54.52 0.33 NaN 44.24 99.04 Section 12-4 Interval 6-8 102.87 55.017 163 Shell #60, infilling 57.55 0.39 0.02 43.52 101.47 Section 12-4 Interval 6-8 102.87 55.017 164 Shell #60, infilling 55.01 0.39 0.04 44.09 99.52 Section 12-4 Interval 6-8 102.87 55.017 165 Shell #60, infilling 52.14 0.31 0.04 44.79 97.27 Section 12-4 Interval 6-8 102.87 55.017 167 Shell #60, infilling 57.73 0.38 NaN 43.49 101.58 Section 12-4 Interval 6-8 102.87 55.017 168 Shell #60, infilling 54.43 0.32 0.01 44.24 99.00 Section 12-4 Interval 6-8 102.87 55.017 170 Shell #60, infilling 57.29 0.09 NaN 43.66 100.90 Section 12-4 Interval 6-8 102.87 55.017 172 Shell #60, infilling 58.35 0.05 0.06 43.36 101.82 Section 12-4 Interval 6-8