View in EDS

High rates of rock organic carbon oxidation sustained as Andean sediment transits the Amazon foreland-floodplain.

Saved in:
Bibliographic Details
Title: High rates of rock organic carbon oxidation sustained as Andean sediment transits the Amazon foreland-floodplain.
Authors: Dellinger, Mathieu1,2 mathieu.dellinger@univ-smb.fr, Hilton, Robert G.1,3 robert.hilton@earth.ox.ac.uk, Baronas, J. Jotautas4, Torres, Mark A.5, Burt, Emily I.6, Clark, Kasey E.7, Galy, Valier8, Ccahuana Quispe, Adan Julian9, West, A. Joshua6
Source: Proceedings of the National Academy of Sciences of the United States of America. 9/26/2023, Vol. 120 Issue 39, p1-9. 17p.
Subjects: Oxidation, Sedimentary rocks, Sediments, Floodplains, Carbon
Abstract: The oxidation of organic carbon contained within sedimentary rocks ("petrogenic" carbon, or hereafter OCpetro) emits nearly as much C2 as is released by volcanism, thereby playing a key role in the long-term global C budget. High erosion rates in mountains have been shown to increase OCpetro oxidation. However, these settings also export unweathered material that may continue to react in downstream floodplains. The relative importance of OCpetro oxidation in mountains versus floodplains remains difficult to assess as disparate methods have been used in the different environments. Here, we investigate the sources and fluxes of rhenium (Re) in the Rio Madre de Dios to quantify OCpetro oxidation from the Andes to the Amazon floodplain using a common approach. Dissolved rhenium concentrations (n = 131) range from 0.01 to 63 pmol L-1 and vary depending on lithology and geomorphic setting. We find that >75% of the dissolved Re derives from OCpetro oxidation and that this proportion increases downstream. We estimate that in the Andes, OCpetro oxidation releases 11.2+4.5/-2.8 tC km-2 y-1 of C2, which corresponds to ~41% of the total OCpetro denudation (sum of oxidized and solid OCpetro). A Re mass balance across the Rio Madre de Dios shows that 46% of OCpetro oxidation takes place in the Andes, 14% in the foreland-lowlands, and 40% in the Andean-fed floodplains. This doubling of OCpetro oxidation flux downstream of the Andes demonstrates that, when present, floodplains can greatly increase OCpetro oxidation and C2 release. [ABSTRACT FROM AUTHOR]
Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 172261619
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: High rates of rock organic carbon oxidation sustained as Andean sediment transits the Amazon foreland-floodplain.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Dellinger%2C+Mathieu%22">Dellinger, Mathieu</searchLink><relatesTo>1,2</relatesTo><i> mathieu.dellinger@univ-smb.fr</i><br /><searchLink fieldCode="AR" term="%22Hilton%2C+Robert+G%2E%22">Hilton, Robert G.</searchLink><relatesTo>1,3</relatesTo><i> robert.hilton@earth.ox.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Baronas%2C+J%2E+Jotautas%22">Baronas, J. Jotautas</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Torres%2C+Mark+A%2E%22">Torres, Mark A.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Burt%2C+Emily+I%2E%22">Burt, Emily I.</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Clark%2C+Kasey+E%2E%22">Clark, Kasey E.</searchLink><relatesTo>7</relatesTo><br /><searchLink fieldCode="AR" term="%22Galy%2C+Valier%22">Galy, Valier</searchLink><relatesTo>8</relatesTo><br /><searchLink fieldCode="AR" term="%22Ccahuana+Quispe%2C+Adan+Julian%22">Ccahuana Quispe, Adan Julian</searchLink><relatesTo>9</relatesTo><br /><searchLink fieldCode="AR" term="%22West%2C+A%2E+Joshua%22">West, A. Joshua</searchLink><relatesTo>6</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America%22">Proceedings of the National Academy of Sciences of the United States of America</searchLink>. 9/26/2023, Vol. 120 Issue 39, p1-9. 17p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Sedimentary+rocks%22">Sedimentary rocks</searchLink><br /><searchLink fieldCode="DE" term="%22Sediments%22">Sediments</searchLink><br /><searchLink fieldCode="DE" term="%22Floodplains%22">Floodplains</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon%22">Carbon</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The oxidation of organic carbon contained within sedimentary rocks ("petrogenic" carbon, or hereafter OCpetro) emits nearly as much C2 as is released by volcanism, thereby playing a key role in the long-term global C budget. High erosion rates in mountains have been shown to increase OCpetro oxidation. However, these settings also export unweathered material that may continue to react in downstream floodplains. The relative importance of OCpetro oxidation in mountains versus floodplains remains difficult to assess as disparate methods have been used in the different environments. Here, we investigate the sources and fluxes of rhenium (Re) in the Rio Madre de Dios to quantify OCpetro oxidation from the Andes to the Amazon floodplain using a common approach. Dissolved rhenium concentrations (n = 131) range from 0.01 to 63 pmol L-1 and vary depending on lithology and geomorphic setting. We find that >75% of the dissolved Re derives from OCpetro oxidation and that this proportion increases downstream. We estimate that in the Andes, OCpetro oxidation releases 11.2+4.5/-2.8 tC km-2 y-1 of C2, which corresponds to ~41% of the total OCpetro denudation (sum of oxidized and solid OCpetro). A Re mass balance across the Rio Madre de Dios shows that 46% of OCpetro oxidation takes place in the Andes, 14% in the foreland-lowlands, and 40% in the Andean-fed floodplains. This doubling of OCpetro oxidation flux downstream of the Andes demonstrates that, when present, floodplains can greatly increase OCpetro oxidation and C2 release. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=172261619
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1073/pnas.2306343120
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: Oxidation
        Type: general
      – SubjectFull: Sedimentary rocks
        Type: general
      – SubjectFull: Sediments
        Type: general
      – SubjectFull: Floodplains
        Type: general
      – SubjectFull: Carbon
        Type: general
    Titles:
      – TitleFull: High rates of rock organic carbon oxidation sustained as Andean sediment transits the Amazon foreland-floodplain.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Dellinger, Mathieu
      – PersonEntity:
          Name:
            NameFull: Hilton, Robert G.
      – PersonEntity:
          Name:
            NameFull: Baronas, J. Jotautas
      – PersonEntity:
          Name:
            NameFull: Torres, Mark A.
      – PersonEntity:
          Name:
            NameFull: Burt, Emily I.
      – PersonEntity:
          Name:
            NameFull: Clark, Kasey E.
      – PersonEntity:
          Name:
            NameFull: Galy, Valier
      – PersonEntity:
          Name:
            NameFull: Ccahuana Quispe, Adan Julian
      – PersonEntity:
          Name:
            NameFull: West, A. Joshua
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 26
              M: 09
              Text: 9/26/2023
              Type: published
              Y: 2023
          Identifiers:
            – Type: issn-print
              Value: 00278424
          Numbering:
            – Type: volume
              Value: 120
            – Type: issue
              Value: 39
          Titles:
            – TitleFull: Proceedings of the National Academy of Sciences of the United States of America
              Type: main
ResultId 1