# 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-odp1090b.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 1090B # Location: Southern Ocean, Atlantic Sector # Country: # Northernmost_Latitude: -42.913687 # Southernmost_Latitude: -42.913687 # Easternmost_Longitude: 8.899737 # Westernmost_Longitude: 8.899737 # Elevation: -3700 #--------------------------------------- # Data_Collection # Collection_Name: ODP1090B Os Paquay2014 # First_Year: 36010000 # Last_Year: 35010000 # Time_Unit: cal yr BP # Core_Length: # Notes: This study (30X-1W-15/17 to 30X-3W-144/146 and 30X-5W-97/98 to 30X-5W-113.5/115.5) and from Paquay et al. (2008). “R” indicates a duplicate analysis (different sample powder). #--------------------------------------- # 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_mcd depth,,,meter,,,,,N,meters composite depth ## age age,,,calendar year before present,,,,,N, ## 187/188Os_bulk 187Os/188Os,bulk sediment,,atom ratio,,,,inductively coupled plasma mass spectrometer,N,Bulk Sediment 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 Sediment Digestion by NiS Fire Assay ## Bulk_Os osmium,bulk sediment,,picograms/gram sediment,,,,inductively coupled plasma mass spectrometer,N,by isotope dilution ## notes notes,,,,,,,,,ODP site-core-section-depth designation. This study (30X-1W-15/17 to 30X-3W-144/146 and 30X-5W-97/98 to 30X-5W-113.5/115.5) and from Paquay et al. (2008). “R” indicates a duplicate analysis (different sample powder). #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: depth_mcd age 187/188Os_bulk 187/188Os_bulk_2se Bulk_Os notes 284.14 35010000 0.49 0.003 64 1090B 30X 1W 15-17 284.24 35020000 0.49 0.005 51 1090B 30X 1W 25-27 284.33 35030000 0.51 0.008 49 1090B 30X 1W 34/36 284.44 35040000 0.501 0.005 77 1090B 30X 1W 45/47 284.54 35050000 0.594 0.004 93 1090B 30X 1W 55/57 284.64 35060000 0.481 0.003 64 1090B 30X 1W 65/67 284.82 35080000 0.457 0.002 37 1090B 30X 1W 83-85 284.94 35090000 0.465 0.002 54 1090B 30X 1W 95/97 285.04 35100000 0.47 0.011 33 1090B 30X 1W 105/107 285.14 35110000 0.452 0.003 27 1090B 30X 1W 115/117 285.34 35130000 0.45 0.004 42 1090B 30X 1W 136-137 285.44 35140000 0.564 0.02 64 1090B 30X 1W 145/147 285.63 35160000 0.443 0.006 42 1090B 30X 2W 14/16 285.73 35170000 0.445 0.008 42 1090B 30X 2W 24/26 285.83 35180000 0.436 0.007 49 1090B 30X 2W 34/36 285.94 35190000 0.443 0.002 54 1090B 30X 2W 44/46 286.05 35200000 0.445 0.002 60 1090B 30X 2W 55/57 286.23 35220000 0.444 0.004 52 1090B 30X 2W 74/76 286.33 35230000 0.413 0.004 66 1090B 30X 2W 84/86 286.45 35240000 0.441 0.005 66 1090B 30X 2W 94/96 286.54 35250000 0.38 0.004 66 1090B 30X 2W 104/106 286.64 35260000 0.438 0.003 91 1090B 30X 2W 114/116 286.64 35260000 0.434 0.003 72 1090B 30X 2W 114/116R 286.84 35280000 0.443 0.003 108 1090B 30X 2W 134/136 287.05 35300000 0.429 0.006 41 1090B 30X 3W 6-7.5 287.23 35340000 0.442 0.005 84 1090B 30X 3W 24/26 287.42 35380000 0.449 0.007 64 1090B 30X 3W 43-45 287.63 35420000 0.434 0.001 60 1090B 30 3W 64-66 287.87 35470000 0.428 0.003 88 1090B 30X 3W 88/90 287.92 35480000 0.466 0.007 77 1090B 30X 3W 93-95 288.04 35510000 0.427 0.003 93 1090B 30X 3W 105/107 288.13 35530000 0.415 0.004 71 1090B 30 3W 114/116 288.23 35550000 0.413 0.003 69 1090B 30X 3W 124/126 288.43 35590000 0.407 0.003 72 1090B 30X 3W 144-146 288.56 35620000 0.433 0.006 66 1090B-030X-04W-7/8R 288.64 35630000 0.414 0.006 50 1090B-030X-04W-15/17 288.73 35650000 0.412 0.011 66 1090B-030X-04W-24/26 288.83 35670000 0.418 0.009 65 1090B-030X-04W-34-36 288.93 35690000 0.407 0.007 61 1090B-030X-04W-44/46 289.05 35710000 0.372 0.006 126 1090B-030X-04W-56/58 289.05 35710000 0.417 0.004 119 1090B-030X-04W-56/58R 289.05 35710000 0.417 0.008 84 1090B-030X-04W-56/58R 289.14 35710000 0.427 0.004 67 1090B-030X-04W-65/67 289.25 35720000 0.425 0.004 74 1090B-030X-04W-76/78R 289.33 35720000 0.408 0.006 70 1090B-030X-04W-84/86R 289.42 35720000 0.422 0.006 73 1090B-030X-04W-93/95 289.51 35730000 0.415 0.003 122 1090B-030X-04W-102/105 289.51 35730000 0.415 0.006 113 1090B-030X-04W-102/105R 289.64 35730000 0.392 0.006 97 1090B-030X-04W-115/117 289.74 35740000 0.384 0.005 135 1090B-030X-04W-125/127 289.84 35740000 0.413 0.003 192 1090B-030X-04W-135-137 290.04 35750000 0.381 0.006 175 1090B-030X-05W-5/7R 290.04 35750000 0.374 0.005 150 1090B-030X-05W-5/7R 290.14 35750000 0.36 0.008 98 1090B-030X-05W-15/17 290.24 35760000 0.356 0.011 86 1090B-030X-05W-25/27 290.33 35760000 0.37 0.007 80 1090B-030X-05W-34-36 290.33 35760000 0.371 0.005 144 1090B-030X-05W-34-36R 290.44 35770000 0.34 0.014 69 1090B-030X-05W-45/47 290.54 35770000 0.331 0.005 68 1090B-030X-05W-55/57 290.64 35770000 0.326 0.005 82 1090B-030X-05W-65/67R 290.73 35780000 0.332 0.006 86 1090B-030X-05W-73.5/75.5 290.84 35780000 0.319 0.004 117 1090B-030X-05W-85/87 290.84 35780000 0.336 0.016 97 1090B-030X-05W-85/87R 290.91 35780000 0.299 0.005 142 1090B-030X-05W-92/94 290.91 35780000 0.29 0.008 147 1090B-030X-05W-92/94R 290.95 35790000 0.283 0.002 150 1090B 30 5W 97/98 290.99 35790000 0.273 0.001 185 1090B 30 5W 103/104 291.04 35790000 0.27 0.002 177 1090B 30 5W 105/106 291.06 35790000 0.25 0.001 240 1090B 30 5W 107/109 291.12 35790000 0.273 0.001 152 1090B 30 5W 113.5/114.5 291.15 35790000 0.282 0.004 153 1090B-030X-05W-116-118 291.15 35790000 0.285 0.006 187 1090B-030X-05W-116-118R 291.23 35800000 0.371 0.005 115 1090B-030X-05W-124/126R 291.23 35800000 0.376 0.007 88 1090B-030X-05W-124/126R 291.35 35800000 0.421 0.005 67 1090B-030X-05w-136/138 291.35 35800000 0.431 0.014 63 1090B-030X-05w-136/138R 291.44 35810000 0.417 0.005 76 1090B-030X-05W-145/147 291.55 35810000 0.45 0.02 70 1090B-030X-06W-6/8 291.64 35820000 0.46 0.004 58 1090B-030X-06W-15/17 291.74 35820000 0.477 0.004 44 10910B-030X-06W-25/27 291.85 35820000 0.475 0.009 83 1090B-030X-06W-36/38 291.94 35830000 0.48 0.005 54 1090B-030X-06W-45/47 292.05 35830000 0.474 0.003 72 1090B-030X-06W-56/58 292.13 35840000 0.483 0.005 56 1090B-030X-06W-64/66 292.24 35840000 0.505 0.006 53 1090B-030X-06W-75/77 292.31 35840000 0.503 0.005 58 1090B-030X-06W-82/84 292.34 35840000 0.49 0.007 51 1090B-030X-06W-85/87 292.44 35850000 0.506 0.013 48 1090B-030-06W-95/97 292.54 35850000 0.505 0.004 47 1090B-030X-06W-105/107 292.64 35860000 0.495 0.005 62 1090B-030-06W-116/118 292.7 35860000 0.427 0.033 55 1090B-030X-06W-121/123 292.85 35870000 0.535 0.007 34 1090B-030X-06W-136/138 292.95 35870000 0.54 0.003 66 1090B-030-06W-146/148 293.06 35870000 0.542 0.007 64 1090B-030-07W-7/9 293.06 35870000 0.535 0.006 61 1090B-030-07W-7/9R 293.12 35880000 0.536 0.003 45 1090B-030X-07W-13/15 293.12 35880000 0.475 0.003 56 1090B-030X-07W-13/15R 293.17 35880000 0.547 0.011 44 1090B-030X-07W-18/20 293.17 35880000 0.553 0.003 40 1090B-030X-07W-18/20R 293.21 35880000 0.483 0.004 45 1090B-030X-07W-22/24 293.32 35880000 0.552 0.039 42 1090B-030-07W-34-36 293.42 35890000 0.464 0.008 38 1090B-030X-07W-43/45 294.53 35890000 0.547 0.007 34 1090B-030-ccw-5/7 293.59 35900000 0.544 0.006 42 1090B-030X-ccw-12/14 293.81 35910000 0.507 0.005 46 1090B-031X-01W-10/13 293.84 35910000 0.563 0.005 40 1090B-031X-01W-23/25 293.97 35920000 0.585 0.007 24 1090B-031X-01W-35.5/37.5 294.09 35930000 0.538 0.014 20 1090B-031X-01W-48/50 294.19 35940000 0.602 0.012 24 1090B-031X01W-58/60 294.32 35940000 0.589 0.012 30 1090B-031X-01W-71/73 294.44 35950000 0.573 0.007 73 1090B-031X-01W-83/85 294.54 35960000 0.576 0.006 90 1090B-031X-01W-93/95 294.68 35970000 0.577 0.009 48 1090B-031X-01W-107/109 294.8 35970000 0.576 0.009 25 1090B-031X-01W-119-121 294.93 35980000 0.508 0.008 36 1090B-031X-01W-132/134 295.16 36000000 0.581 0.005 31 1090B-031X-02W-6/8 295.28 36010000 0.539 0.01 36 1090B-031X-02W-16/19