Sediment Ramped Pyrolysis and Isotope Data from the northern Gulf of Mexico, October 12, 2010 to June 19, 2015

Ecosystem Impacts of Oil and Gas Inputs to the Gulf-2 (ECOGIG-2)

DOI:
10.7266/N7KH0KWJ
 
UDI:
R4.x268.000:0109
Last Update:
Jun 13 2018 17:34 UTC
 
Dataset Author(s):
Jeffrey Chanton
Point of Contact:
Chanton, Jeffrey Paul
Florida State University / Department of Earth, Ocean, and Atmospheric Science
1017 Academic Way PO Box 3064520
Tallahassee, Florida  32306
USA
jchanton@fsu.edu
Funding Source:
RFP-IV
Data Collection Period:
2010-10-12 to 2015-06-19

Identified Submitted In-Review Available
3 3 3 3

Suggested Citation:

Jeffrey Chanton. 2018. Sediment Ramped Pyrolysis and Isotope Data from the northern Gulf of Mexico, October 12, 2010 to June 19, 2015. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7KH0KWJ

Abstract:

The purpose of this study was to analyze the recovery of oil contaminated deep-sea sediment from by analyzing the carbon isotopic composition of bulk sedimentary organic carbon and the thermochemical stability of sediment from 5 sites in the northern Gulf of Mexico, using ramped pyrolysis/oxidation. There were clear differences between crude oil (low temperature), natural hydrocarbon seep sediment (medium temperature; Δ14C = -912‰) and our control site (medium temperature; Δ14C = -189‰), in both the thermographs and carbon isotope signatures. We observed recovery in the bulk Δ14C in sites further from the wellhead in ~4 years, while sites in closer proximity took 5-6 years to recover. The thermographs also indicated changes over time in the composition of the sediment, with shifts towards higher temperatures over time at sites near the wellhead, and losses of higher temperature CO2 peaks at more distal sites.

Purpose:

To determine the fate of oil as it weathered and was biodegraded on the seafloor.

Theme Keywords:

ramped pyrolysis, radiocarbon, sediments

File Format:

xlsx

Filename:

Ramped pyrolysis data.xlsx (15.76 KB)

Dataset Downloads:

3

Sediment Ramped Pyrolysis and Isotope Data from the northern Gulf of Mexico, October 12, 2010 to June 19, 2015



Identification Information
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Metadata Maintenance Information

Metadata: 
  File identifier: 
      R4.x268.000-0109-metadata.xml
  Language: 
      eng; USA
  Character set: 
    Character set code: 
      utf8
  Hierarchy level: 
    Scope code: 
      dataset
  Metadata author: 
    Responsible party: 
      Individual name: 
          Brian Dixon
      Organisation name: 
          University of Georgia / Department of Marine Sciences
      Position name: 
          Data Manager
      Contact info: 
        Contact: 
          Phone: 
            Telephone: 
              Voice: 
                  2182487483
              Facsimile: 
          Address: 
            Address: 
              Delivery point: 
                  Marine Sciences Building
                  325 Sanford Dr
              City: 
                  Athens
              Administrative area: 
                  Georgia
              Postal code: 
                  30602
              Country: 
                  USA
              Electronic mail address: 
                  dixonb@uga.edu
      Role: 
        Role code: 
          pointOfContact
  Date stamp: 
      2021-05-04T20:04:56+00:00
  Metadata standard name: 
      ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
  Metadata standard version: 
      ISO 19115-2:2009(E)
  Dataset URI: 
      https://data.gulfresearchinitiative.org/metadata/R4.x268.000:0109
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Identification info: Data identification: Citation: Citation: Title: Sediment Ramped Pyrolysis and Isotope Data from the northern Gulf of Mexico, October 12, 2010 to June 19, 2015 Alternate title: Date: Date: Date: 2018-07-06 Date type: Date type code: publication Identifier: Identifier: Code: Anchor: xlink: https://dx.doi.org/10.7266/N7KH0KWJ title: DOI doi:10.7266/N7KH0KWJ Abstract: The purpose of this study was to analyze the recovery of oil contaminated deep-sea sediment from by analyzing the carbon isotopic composition of bulk sedimentary organic carbon and the thermochemical stability of sediment from 5 sites in the northern Gulf of Mexico, using ramped pyrolysis/oxidation. There were clear differences between crude oil (low temperature), natural hydrocarbon seep sediment (medium temperature; Δ14C = -912‰) and our control site (medium temperature; Δ14C = -189‰), in both the thermographs and carbon isotope signatures. We observed recovery in the bulk Δ14C in sites further from the wellhead in ~4 years, while sites in closer proximity took 5-6 years to recover. The thermographs also indicated changes over time in the composition of the sediment, with shifts towards higher temperatures over time at sites near the wellhead, and losses of higher temperature CO2 peaks at more distal sites. Purpose: To determine the fate of oil as it weathered and was biodegraded on the seafloor. Status: Progress code: completed Point of contact: Responsible party: Individual name: Jeffrey Paul Chanton Organisation name: Florida State University / Department of Earth, Ocean, and Atmospheric Science Position name: Professor Contact info: Contact: Phone: Telephone: Voice: 8506447493 Facsimile: Address: Address: Delivery point: 1017 Academic Way PO Box 3064520 City: Tallahassee Administrative area: Florida Postal code: 32306 Country: USA Electronic mail address: jchanton@fsu.edu Role: Role code: author Descriptive keywords: Keywords: Keyword: ramped pyrolysis Keyword: radiocarbon Keyword: sediments Type: Keyword type code: theme Descriptive keywords: Keywords: Keyword: northern Gulf of Mexico Type: Keyword type code: place Resource constraints: title: Cite As Constraints: Use limitation: Jeffrey Chanton. 2018. Sediment Ramped Pyrolysis and Isotope Data from the northern Gulf of Mexico, October 12, 2010 to June 19, 2015. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7KH0KWJ Resource constraints: title: CC0 License Legal constraints: Use constraints: Restriction code: licenceUnrestricted Other constraints: This information is released under the Creative Commons license - No Rights Reserved - CC0 1.0 Universal (https://creativecommons.org/publicdomain/zero/1.0/). The person who associated a work with this deed has dedicated the work to the public domain by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission. Resource constraints: title: Liability and Warranty Legal constraints: Other constraints: All materials on this website are made available to GRIIDC and in turn to you "as-is." Content may only be submitted by an individual who represents and warrants that s/he has sufficient rights to be able to make the content available under a CC0 waiver. There is no warranty (expressed or implied) to these materials, their title, accuracy, non-infringement of third party rights, or fitness for any particular purpose, including the performance or results you may obtain from their use. Use these materials at your own risk. Under no circumstances shall GRIIDC be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use or the inability to use either this website or the materials available via this website. If you are dissatisfied with any website feature, content, or terms of use, your sole and exclusive remedy is to discontinue use. Aggregation Info: AggregateInformation: Aggregate Data Set Name: title: Related Publication Citation Citation: Title: Rogers, K. L., Bosman, S. H., Lardie-Gaylord, M., McNichol, A., Rosenheim, B. E., Montoya, J. P., & Chanton, J. P. (2019). Petrocarbon evolution: Ramped pyrolysis/oxidation and isotopic studies of contaminated oil sediments from the Deepwater Horizon oil spill in the Gulf of Mexico. PLOS ONE, 14(2), e0212433. doi:10.1371/journal.pone.0212433 Date: inapplicable Aggregate Data Set Identifier: title: Related Publication DOI Identifier: Code: Anchor: xlink: https://dx.doi.org/10.1371/journal.pone.0212433 title: DOI doi:10.1371/journal.pone.0212433 Association Type: Association type code: crossReference Language: eng; USA Topic category: Topic category code: oceans Extent: Extent: Geographic element: Geographic bounding box: West bound longitude: -90.5629 East bound longitude: -87.48 South bound latitude: 27.36452 North bound latitude: 28.63728 Geographic element: BoundingPolygon: Polygon: gml:MultiPoint: gml:pointMember: Point: gml:pos: 28.23972 -89.1207 gml:pointMember: Point: gml:pos: 28.23972 -89.1207 gml:pointMember: Point: gml:pos: 28.24048 -89.119 gml:pointMember: Point: gml:pos: 27.49767 -90.0203 gml:pointMember: Point: gml:pos: 28.575 -88.5377 gml:pointMember: Point: gml:pos: 28.63728 -88.5188 gml:pointMember: Point: gml:pos: 28.63728 -88.5188 gml:pointMember: Point: gml:pos: 28.63705 -87.48 gml:pointMember: Point: gml:pos: 27.36452 -90.5629 gml:pointMember: Point: gml:pos: 27.36452 -90.5629 Temporal element: Temporal extent: Extent: Time period: Description: ground condition Begin date: 2010-10-12 End date: 2015-06-19 Supplemental Information: Accession # = NOSAMS (national ocean science ams) facility id number; Sample ID = FSU sample ID; Fraction = time series sample of CO2 evolution with increasing temperature; Latitude = decimal degrees North; Longitude = decimal degrees West; d13C 13C/12C isotope ratio in per mil; 14C radiocarbon content in per mill; CO2 umol = micromoles of CO2; evolve from temperature start to stop start T = degrees C; stop T = degrees C GIP07 2010 0-1 10-12-2010 GIP07 2011 0-1 10-21-2011 GIP07 2014 0-1 8-24-2014 GB480 2015 0-1 6-12-2015 BP444 2015 0-1 6-19-2015 BP444 2015 1-2 6-19-2015 BP444 2015 3-4 6-19-2015 GIP17 2010 0-1 10-17-2010 GIP17 2011 0-1 10-23-2011 GIP17 2015 0-1 6-6-2015 GC600 2014 0-1 4-4-2014|Ramped pyrolysis/oxidation (RPO) is an approach used to detect the thermochemical stability of organic carbon. When paired with δ13C and Δ14C isotope analysis, the source of the carbon can be determined as a function of thermal stability. The thermochemical stability of a compound is based on the amount of energy needed to break the bonds in the compound, with higher stability requiring higher temperatures, while more labile bonds break at lower temperatures. The thermal stability of a compound is related to its lability, reactivity, and suitability as a substrate in microbially mediated reactions in the environment. The Programmable Temperature Control System (PTCS) at NOSAMS was used to serially oxidize these sediments in a controlled environment, following the instrument protocol for pyrolysis in Rosenheim et al. (2008). An aliquot of sediment, between ~80-110 mg depending on the C content, was loaded into a precombusted quartz tube, between layers of precombusted quartz wool, and inserted into the combustion oven, sealed away from atmosphere. A total gas flow of 35 mL/min of helium with 8% oxygen flowed through the sample as the temperature was consistently ramped up to 800-1000°C (5°C /min). At selected temperature intervals, the evolved CO2 was collected and cryogenically purified prior to being sealed in a sample ampoule. With each switch of the temperature interval, the CO2 was continuously collected in a secondary N2 (l) trap. Next, roughly 10% of CO2 was diverted during the graphitization process, to be analyzed for δ13C. The graphite was analyzed for Δ14C at NOSAMS. Hemingway et al. (2017) estimated the blank for a typical RPO analysis was 3.7 ± 0.6 µg C, with δ13C = -29.1± 0.1‰ and potentially Δ14C = -449 ± 41‰. The blank carbon correction for δ13C ranged between -0.02 to +0.15‰ and Fm ranged from -0.002 to +0.002 (Δ14C ~ 3-4 ‰). Due to the small size of these corrections, the data herein were not corrected. Rosenheim, B.E., Day, M.B., Domack, E., Schrum, H., Benthien, A., & Hayes, J.M. (2008). Antarctic sediment chronology by programmed-temperature pyrolysis: Methodology and data treatment. Geochemistry, Geophysics, Geosystems, 9(4): Q04005. doi: 10.1029/2007GC001816 Hemingway, J.D., Galy, V.V., Gagnon, A.R., & Grant, K.E. (2017). Assessing the Blank Carbon Contribution, Isotope Mass Balance, and Kinetic Isotope Fractionation of the Ramped Pyrolysis/Oxidation Instrument at NOSAMS. Radiocarbon, 59(1): 179-193. doi: 10.1017/RDC.2017.3|The Programmable Temperature Control System (PTCS) Accelerator Mass Spectrometer||The blank for a typical RPO analysis was 3.7 ± 0.6 µg C, with δ13C = -29.1± 0.1‰ and potentially Δ14C = -449 ± 41‰. The blank carbon correction for δ13C ranged between -0.02 to +0.15‰ and Fm ranged from -0.002 to +0.002 (Δ14C ~ 3-4 ‰). Due to the small size of these corrections, the data herein were not corrected. Replication of 17 bulk sediment samples averaged 6.5‰|
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Distribution info: Distribution: Distributor: Distributor: Distributor contact: Responsible party: Organisation name: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC) Contact info: Contact: Phone: Telephone: Voice: 3618253604 Address: Address: Delivery point: 6300 Ocean Drive City: Corpus Christi Administrative area: TX Postal code: 78412 Country: USA Electronic mail address: griidc@gomri.org Online Resource: Online Resource: Linkage: URL: https://data.gulfresearchinitiative.org Role: Role code: distributor Distributor format: Format: Name: xlsx Version: inapplicable File decompression technique: Distributor transfer options: Digital transfer options: Transfer size: 0.0158 Online: Online Resource: Linkage: URL: https://data.gulfresearchinitiative.org/data/R4.x268.000:0109 Protocol: https Name: Data Landing Page Description: GRIIDC dataset landing page Function: Online function code: information
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Metadata maintenance: Maintenance information: Maintenance and update frequency: unknown Maintenance note: This ISO metadata record was automatically generated from information provided to GRIIDC for dataset: R4.x268.000:0109 on 2021-06-18T10:18:26-05:00
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