# Late Eocene marine Os isotope record from Italy, the Southern Atlantic, and the Eastern Pacific #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # 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: https://www.ncdc.noaa.gov/paleo/study/22811 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/paquay2014/paquay2014-odp1218.txt # Description: NOAA location of this template # # Archive: Paleoceanography # # Dataset DOI: # # Parameter_Keywords: radiogenic isotopes, geochemistry #--------------------------------------- # Contribution_Date # Date: 2017-10-17 #--------------------------------------- # File_Last_Modified_Date # Date: 2017-10-17 #--------------------------------------- # Title # Study_Name: Late Eocene marine Os isotope record from Italy, the Southern Atlantic, and the Eastern Pacific #--------------------------------------- # Investigators # Investigators: Paquay, Francois S.; Ravizza, Greg; Coccioni, Rodolpho #--------------------------------------- # Description_Notes_and_Keywords # Description: # Provided Keywords: Osmium Isotope,Eocene #--------------------------------------- # Publication # Authors: Paquay, Francois S., Greg Ravizza, and Rodolpho Coccioni # Published_Date_or_Year: 2014 # Published_Title: The influence of extraterrestrial material on the late Eocene marine Os isotope record # Journal_Name: Geochimica Cosmochimica Acta # Volume: 144 # Edition: # Issue: # Pages: 238-257 # Report Number: # DOI: 10.1016/j.gca.2014.08.024 # Online_Resource: # Full_Citation: # Abstract: A reconstruction of seawater 187Os/188Os ratios during the late Eocene (~36–34 Ma), based upon bulk sediment analyses from the sub-Antarctic Southern Atlantic Ocean (Ocean Drilling Program (ODP) Site 1090), Eastern Equatorial Pacific Ocean (ODP Sites 1218 and 1219) and the uplifted (land-based) Tethyan section (Massignano, Italy), confirms that the previously reported abrupt shift to lower 187Os/188Os is a unique global feature of the marine Os isotope record that occurs in magnetochron C16n.1n. This feature is interpreted to represent the change in seawater 187Os/188Os caused by the Popigai impact event. Higher in the Massignano section, two other iridium anomalies previously proposed to represent additional impact events do not show a comparable excursion to low 187Os/188Os, suggesting that these horizons do not record multiple large impacts. Comparison of records from three different ocean basins indicates that seawater 187Os/188Os begins to decline in advance of the Popigai impact event. At Massignano this decline coincides with a previously reported episode of elevated 3He flux, suggesting that increased influx of interplanetary dust particles (IDPs) contributed to the pre-impact shift in 187Os/188Os and not to the longer-term latest Eocene 187Os/188Os decline that occurred ~1 million year after the Popigai impact event. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: NSF # Grant: 1061061 #--------------------------------------- # Site Information # Site_Name: ODP 1218 # Location: Eastern Pacific # Country: # Northernmost_Latitude: 8.8894 # Southernmost_Latitude: 8.8894 # Easternmost_Longitude: -135.3667 # Westernmost_Longitude: -135.3667 # Elevation: -4828 #--------------------------------------- # Data_Collection # Collection_Name: ODP1218 Os Paquay2014 # First_Year: 36620000 # Last_Year: 35000000 # Time_Unit: cal yr BP # Core_Length: # Notes: Data source: This Study Or Dalai et al. 2006 EPSL 241:477-492. Age model is detailed in the publication. #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab- 10 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data,additional info ## depth_mbsf depth,,,meter,,,,,N,meters below seafloor ## age_calyrBP age,,,calendar year before present,,,,,N, ## 187/188Os_bulk 187Os/188Os,bulk sediment,,atom ratio,,,,inductively coupled plasma mass spectrometer,N,Digestion by NiS fire assay ## 187/188Os_bulk_2se 187Os/188Os,bulk sediment,two standard error of the mean,atom ratio,,,,inductively coupled plasma mass spectrometer,N, ## Bulk_Os osmium,bulk sediment,,picograms/gram sediment,,,,inductively coupled plasma mass spectrometer,N,by isotope dilution ## notes notes,,,,,,,,C,ODP site-core-section-depth designation ## notes notes,,,,,,,,C,Data source: This Study Or Dalai et al. 2006 EPSL 241:477-492 #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: depth_mbsf age_calyrBP 187/188Os_bulk 187/188Os_bulk_2se Bulk_Os notes notes 206.71 32843000 0.544 0.010 67 1218A 23X 1W 120-122 Dalai et al. 2006 208.41 32988000 0.520 0.002 82 1218A 23X 2W 140-142 Dalai et al. 2006 209.41 33064000 0.546 0.009 77 1218A 23X 3W 90-92 Dalai et al. 2006 211.41 33239000 0.496 0.002 103 1218A 23X 4W 140-142 Dalai et al. 2006 212.41 33315000 0.482 0.002 75 1218A 23X 5W 90-92 Dalai et al. 2006 213.53 33401000 0.471 0.002 44 1218A 23X 6W 50-55 Dalai et al. 2006 214.41 33471000 0.466 0.003 105 1218A 23X 6W 140-142 Dalai et al. 2006 214.41 33471000 0.437 0.002 114 1218A 23X 6W 140-142R Dalai et al. 2006 215.16 33732000 0.433 0.003 50 1218A 24X 1W 3--8 Dalai et al. 2006 215.71 33807000 0.446 0.003 108 1218A 24X 1W 60-62 Dalai et al. 2006 215.71 33807000 0.442 0.003 103 1218A 24X 1W 60-62Rep Dalai et al. 2006 216.03 33850000 0.430 0.003 40 1218A 24X 1W 90-95 Dalai et al. 2006 214.76 33869000 0.406 0.002 46 1218B-24X-1W-106/108 This study 214.90 33888000 0.402 0.002 45 1218B-24X-1W-120/122 This study 216.50 33925000 0.426 0.003 93 1218A 24X 2W 30-32 Dalai et al. 2006 216.81 33977000 0.399 0.002 36 1218A 24X 2W 60-65 Dalai et al. 2006 217.09 34024000 0.401 0.006 88 1218A 24X 2W 90-92 Dalai et al. 2006 217.62 34111000 0.364 0.005 73 1218A 24X 2W 140-145 Dalai et al. 2006 218.20 34207000 0.348 0.005 54 1218A 24X 3W 47-52 Dalai et al. 2006 218.91 34324000 0.355 0.003 98 1218A 24X 3W 120-122 Dalai et al. 2006 218.91 34324000 0.353 0.002 100 1218A 24X 3W 120-122R Dalai et al. 2006 219.31 34391000 0.322 0.002 154 1218A 24X 4W 10--12 Dalai et al. 2006 219.61 34440000 0.302 0.002 155 1218A 24X 4W 40-42 Dalai et al. 2006 220.21 34540000 0.276 0.001 141 1218A 24X 4W 100-102 Dalai et al. 2006 220.81 34639000 0.329 0.006 101 1218A 24X 5W 10--12 Dalai et al. 2006 221.11 34688000 0.288 0.001 135 1218A 24X 5W 40-42 Dalai et al. 2006 221.41 34736000 0.312 0.002 104 1218A 24X 5W 70-72 Dalai et al. 2006 221.71 34783000 0.338 0.001 102 1218A 24X 5W 100-102 Dalai et al. 2006 219.74 34821000 0.329 0.004 68 1218B-24X-5W-4/6 This study 219.80 34833000 0.341 0.002 107 1218B 24X 5W 10/12 This study 219.94 34859000 0.379 0.006 66 1218B-24X-5W-24/26 This study 220.00 34870000 0.368 0.003 70 1218B-24X-5W-30/32 This study 220.14 34897000 0.394 0.004 58 1218B-24X-5W-44/46 This study 220.20 34908000 0.454 0.006 54 1218B 24X 5W 50-52 This study 220.34 34935000 0.397 0.008 55 1218B 24X 5W 64-66 This study 220.34 34935000 0.417 0.009 75 1218B 24X 5W 64-66 REP This study 220.40 34946000 0.450 0.009 65 1218B 24X 5W 70-72 This study 220.50 34965000 0.519 0.007 54 1218B 24X 5W 80-82 This study 220.56 34976000 0.405 0.001 58 1218B 24X 5W 86-88 This study 222.91 34977000 0.465 0.015 57 1218A 24X 6W 70-72 Dalai et al. 2006 220.64 34989000 0.457 0.003 79 1218B 24X 5W 94/96 This study 220.70 34996000 0.454 0.002 59 1218B-24X-5W-100/102 This study 220.76 35033000 0.460 0.008 37 1218B-24X-5W-106/108 This study 220.76 35033000 0.500 0.004 32 1218B-24X-5W-114/116 This study 223.21 35069000 0.481 0.004 51 1218A 24X 6W 100-102 Dalai et al. 2006 220.84 35083000 0.491 0.005 64 1218B-24X-5W-114/116 REP This study 220.90 35120000 0.483 0.004 52 1218B-24X-5W-120/122 This study 221.02 35194000 0.481 0.003 34 1218B-24X-5W-132/134 This study 221.10 35243000 0.483 0.012 105 1218B 24X 5W 140-142 This study 221.18 35292000 0.477 0.003 33 1218B 24X 5W 148-150 This study 221.24 35330000 0.502 0.004 84 1218B 24X 6W 4/6 This study 223.77 35362000 0.537 0.007 43 1218A 24X 7W 6--8 Dalai et al. 2006 221.30 35367000 0.534 0.015 45 1218B 24X 6W 10/12 This study 221.36 35404000 0.505 0.006 45 1218B 24X 6W 16/18 This study 221.50 35490000 0.503 0.002 68 1218B 24X 6W 30-32 This study 221.60 35552000 0.487 0.007 80 1218B 24X 6W 40-42 This study 221.64 35576000 0.490 0.010 66 1218B 24X 6W 44-46 This study 221.70 35613000 0.501 0.009 62 1218B 24X 6W 50/52 This study 221.70 35613000 0.497 0.005 150 1218B 24X 6W 50/52 REP This study 221.76 35650000 0.542 0.013 36 1218B 24X 6W 56-58 This study 221.84 35705000 0.408 0.002 74 1218B 24X 6W 64-66 This study 221.90 35711000 0.490 0.003 65 1218B 24X 6W 70-72 This study 224.51 35713000 0.522 0.010 47 1218A 24X 7W 80-82 Dalai et al. 2006 221.94 35715000 0.449 0.002 36 1218B 24X 6W 74/76 This study 222.00 35722000 0.487 0.005 34 1218B 24X 6W 80/82 This study 222.26 35749000 0.470 0.456 39 1218B 24X 6W 106/107 This study 222.46 35769000 0.485 0.006 47 1218B 24X 6W 126/127 This study 222.60 35784000 0.451 0.003 35 1218B-24X-6W-140/142 This study 222.74 35797000 0.450 0.005 41 1218B-24X-7W-4/6 This study 222.80 35798000 0.475 0.003 103 1218B-24X-7W-10/12 This study 222.86 35798000 0.424 0.005 40 1218B-24X-7W-16/18 This study 222.94 35799000 0.360 0.004 261 1218B-24X-7W-24/26 This study 223.00 35800000 0.312 0.002 73 1218B-24X-7W-30-32 This study 223.06 35800000 0.240 0.002 302 1218B-24X-7W-36/38 This study 223.06 35800000 0.251 0.003 780 1218B-24X-7W-36/38 rep This study 223.10 35812000 0.245 0.003 162 1218B-24X-7W-40/42 This study 223.13 35822000 0.325 0.003 26 1218B-24X-7W-43/44 This study 224.77 36251000 0.537 0.011 84 1218A 25X 1W 6--8 Dalai et al. 2006 223.88 36356000 0.522 0.004 17 1218B-25X-1W-57/59 This study 223.90 36361000 0.546 0.007 22 1218B-25X-1W-60/62 This study 224.02 36393000 0.502 0.013 25 1218B-25X-1W-72/74 This study 224.24 36446000 0.548 0.004 29 1218B-25X-1W-94/96 This study 224.55 36511000 0.571 0.020 24 1218B-25X-1W-125/127 This study