# 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-massignano.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; Ravizza, Greg; Coccioni, Rodolpho #--------------------------------------- # Description_Notes_and_Keywords # Description: # Provided Keywords: Osmium Isotope, Miocene #--------------------------------------- # 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: Massignano, Italy # Location: Italy # Country: Italy # Northernmost_Latitude: 43.5355 # Southernmost_Latitude: 43.5355 # Easternmost_Longitude: 13.589333 # Westernmost_Longitude: 13.589333 # Elevation: #--------------------------------------- # Data_Collection # Collection_Name: Massignano Os Paquay2014 # First_Year: 36620000 # Last_Year: 35000000 # Time_Unit: cal yr BP # Core_Length: # Notes: Ages determined by linear interpolation between magnet reversals. See publication in metadate for details. #--------------------------------------- # 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_msl depth,,,meter,,,,,N,meters section level ## 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,Digestion by NiS fire assay ## Bulk_Os osmium,bulk sediment,,picograms/gram sediment,,,,inductively coupled plasma mass spectrometer,N,by isotope dilution ## Ir iridium,bulk sediment,,picograms/gram sediment,,,,inductively coupled plasma mass spectrometer,N,by isotope dilution ## Pt platinum,bulk sediment,,picograms/gram sediment,,,,inductively coupled plasma mass spectrometer,N,by isotope dilution #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: Depth_(msl) Age 187/188 Err_187/188 Os Ir Pt 0.5 36620000 0.5243 0.0035 35 44 272 1 36540000 0.4853 0.0027 37 39 242 1.1 36530000 0.5272 0.0117 31 46 303 1.2 36510000 0.589 0.0064 24 33 240 1.3 36500000 0.5242 0.0046 11 33 197 1.4 36480000 0.5123 0.0047 31 99 699 1.5 36470000 -999 -999 -999 40 333 1.5 36470000 0.5496 0.0076 124 -999 -999 1.5 36470000 0.5469 0.0045 37 39 368 1.7 36430000 0.5214 0.0039 30 56 377 1.8 36420000 0.5199 0.0086 37 -999 -999 1.9 36400000 0.5264 0.0034 67 81 1268 2 36390000 0.5281 0.0133 33 69 531 2.4 36320000 0.537 0.0046 27 56 302 2.7 36280000 0.501 0.0064 30 239 1370 2.7 36280000 0.5152 0.0035 39.33 42 489 2.75 36270000 0.5175 0.0048 27 60 418 2.75 36270000 0.5119 0.0067 49.8 66 700 3 36230000 0.5089 0.0025 34.97 -999 -999 3.2 36200000 0.5602 0.0015 30.8 -999 -999 3.35 36180000 0.5525 0.0077 22.99 31 440 3.45 36160000 0.526 0.005 38 98 1241 3.45 36160000 0.537 0.0051 32.43 47 1604 3.5 36150000 0.5228 0.0042 39 48 378 3.5 36150000 0.5293 0.0053 26.26 -999 -999 3.55 36140000 0.47 0.003 27 92 999 3.6 36140000 0.5323 0.007 29 73 552 3.6 36140000 0.5687 0.0124 43.08 -999 -999 3.6 36140000 0.5184 0.0021 36 -999 -999 3.8 36110000 0.2565 0.0019 84 127 393 3.8 36110000 0.5082 0.0081 29 49 370 4 36070000 0.495 0.0083 35 75 647 4.1 36060000 0.5214 0.0054 23 75 368 4.2 36040000 0.5524 0.0043 38 44 390 4.5 36000000 0.5107 0.0031 33 46 332 4.5 36000000 0.5325 0.0048 25 72 392 5 35920000 0.5026 0.0078 58 67 549 5 35920000 0.481 0.0099 49 108 157 5.04 35920000 0.5196 0.0035 49 85 396 5.08 35910000 0.5103 0.0055 43 77 459 5.12 35900000 0.4569 0.0038 44 95 623 5.12 35900000 0.5034 0.004 37 49 584 5.16 35900000 0.5076 0.0039 39 55 535 5.2 35890000 0.4922 0.005 43 50 572 5.24 35880000 0.4905 0.932 46 77 415 5.28 35880000 0.5094 0.0032 34 52 257 5.3 35870000 0.4861 0.0031 20 57 358 5.32 35870000 0.4968 0.0054 68 137 922 5.32 35870000 0.507 0.007 55 169 1076 5.36 35860000 0.4835 0.0036 62 54 596 5.36 35860000 0.5009 0.0044 60 74 606 5.4 35860000 0.4659 0.0036 37 57 467 5.44 35850000 0.4065 0.0032 51 59 516 5.48 35840000 0.424 0.0015 58 62 461 5.52 35830000 0.458 0.0117 71 70 868 5.52 35830000 0.4772 0.0005 59 98 705 5.52 35830000 0.4663 0.0039 32 46 339 5.56 35830000 0.3866 0.0011 71 67 288 5.56 35830000 0.4519 0.0023 47 112 262 5.61 35820000 -999 -999 -999 88 945 5.61 35820000 -999 -999 -999 87 939 5.61 35820000 0.453 0.0017 88 -999 -999 5.61 35820000 -999 -999 -999 86 871 5.61 35820000 0.4321 0.0035 56 69 488 5.63 35810000 -999 -999 -999 102 1178 5.63 35810000 0.4426 0.0012 108 129 1300 5.65 35810000 0.3209 0.0051 98 415 854 5.65 35810000 -999 -999 -999 400 809 5.65 35810000 0.3568 0.0063 96 401 930 5.65 35810000 -999 -999 -999 462 760 5.65 35810000 0.3114 0.0014 138 415 1080 5.66 35810000 0.3426 0.0028 96 351 772 5.68 35800000 0.3239 0.0031 92 424 884 5.7 35800000 0.3092 0.0014 92 244 468 5.72 35800000 -999 -999 -999 198 380 5.72 35800000 -999 -999 -999 199 396 5.74 35790000 0.3321 0.0016 63 134 255 5.76 35790000 0.3089 0.0013 89 142 363 5.76 35790000 0.3283 0.0083 77 -999 -999 5.76 35790000 0.3953 0.0049 69 -999 -999 5.76 35790000 -999 -999 -999 137 659 5.78 35790000 0.3733 0.0044 69 178 698 5.79 35780000 0.3921 0.0011 110 162 872 5.81 35780000 0.3888 0.0157 93 125 958 5.83 35780000 -999 -999 -999 82 270 5.83 35780000 0.3965 0.0064 64 108 357 5.85 35770000 0.4234 0.0075 53 97 260 5.86 35770000 0.4143 0.0046 46 58 331 5.88 35770000 -999 -999 -999 187 2284 5.9 35760000 -999 -999 -999 86 1039 5.92 35760000 0.4126 0.004 42 51 333 5.94 35760000 0.3902 0.0028 54 70 423 5.96 35750000 0.4209 0.0046 56 89 567 5.98 35750000 0.4339 0.0027 57 58 452 5.98 35750000 -999 -999 -999 58 472 6 35750000 0.4312 0.0019 67 85 592 6.02 35740000 0.4323 0.0013 60 56 320 6.02 35740000 0.4283 0.0041 55 59 421 6.04 35740000 0.3236 0.0054 67 76 197 6.04 35740000 0.447 0.0043 60 59 474 6.05 35740000 0.4189 0.0024 60 69 801 6.07 35730000 -999 -999 -999 64 540 6.07 35730000 0.4091 0.0036 75 97 682 6.09 35730000 -999 -999 -999 200 3450 6.11 35730000 0.4404 0.0023 72 65 574 6.13 35720000 0.4313 0.0014 86 71 800 6.15 35720000 0.4541 0.0017 65 72 544 6.17 35720000 0.4419 0.0044 58 59 429 6.17 35720000 0.4732 0.0106 55 128 566 6.17 35720000 0.4623 0.0038 57 57 724 6.2 35710000 0.4138 0.0014 63 25 155 6.2 35710000 0.4598 0.0029 60 -999 56 6.24 35700000 0.4452 0.013 48 62 401 6.28 35700000 0.4588 0.0057 47 98 1093 6.28 35700000 -999 -999 -999 53 337 6.32 35690000 0.4605 0.0034 66 67 621 6.32 35690000 -999 -999 -999 64 638 6.36 35690000 0.4597 0.0039 50 67 481 6.4 35680000 0.4487 0.004 38 43 343 10 35170000 0.4282 0.0024 47 62 402 10.1 35160000 0.38 0.0048 46 48 471 10.2 35140000 0.3506 0.0041 59 86 734 10.25 35130000 0.4585 0.0053 48 69 597 10.25 35130000 0.4423 0.0031 63 55 885 10.3 35120000 0.4185 0.0026 64 56 332 10.4 35110000 0.4264 0.0067 59 70 379 10.5 35090000 0.4002 0.0044 60 62 491 10.7 35060000 -999 -999 -999 75 946 10.7 35060000 0.4324 0.002 82 56 565 10.8 35040000 0.2662 0.0021 113 145 317 10.8 35040000 0.4421 0.0037 57 52 489 10.9 35020000 0.408 0.0053 50 40 262 11 35010000 0.349 0.0011 101 -999 -999