Digitala Vetenskapliga Arkivet

Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Origin and alteration of organic matter in hydrate-bearing sediments of the Rio Grande Cone, Brazil: evidence from biological, physical, and chemical factors.
Universidade Federal Fluminense, Brazil;Pontifícia Universidade Católica do Rio Grande do Sul, Brazil.
Universidade Federal Fluminense, Brazil.
Universidade Federal Fluminense, Brazil.
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. Pontifícia Universidade Católica do Rio Grande do Sul, Brazil.ORCID iD: 0000-0003-4796-8177
Show others and affiliations
2020 (English)In: Radiocarbon, ISSN 0033-8222, E-ISSN 1945-5755, Vol. 62, no 1, p. 197-206Article in journal (Refereed) Published
Abstract [en]

The Rio Grande Cone is a major fanlike depositional feature in the continental slope of the Pelotas Basin, Southern Brazil. Two representative sediment cores collected in the Cone area were retrieved using a piston core device. In this work, the organic matter (OM) in the sediments was characterized for a continental vs. marine origin using chemical proxies to help constrain the origin of gas in hydrates. The main contribution of OM was from marine organic carbon based on the stable carbon isotope (δ13C-org) and total organic carbon/total nitrogen ratio (TOC:TN) analyses. In addition, the 14C data showed important information about the origin of the OM and we suggest some factors that could modify the original organic matter and therefore mask the “real” 14C ages: (1) biological activity that could modify the carbon isotopic composition of bulk terrestrial organic matter values, (2) the existence of younger sediments from mass wasting deposits unconformably overlying older sediments, and (3) the deep-sediment-sourced methane contribution due to the input of “old” (>50 ka) organic compounds from migrating fluids.

Place, publisher, year, edition, pages
Cambridge University Press, 2020. Vol. 62, no 1, p. 197-206
National Category
Earth and Related Environmental Sciences
Research subject
Natural Science
Identifiers
URN: urn:nbn:se:lnu:diva-88910DOI: 10.1017/RDC.2019.109ISI: 000510445400013OAI: oai:DiVA.org:lnu-88910DiVA, id: diva2:1347857
Available from: 2019-09-02 Created: 2019-09-02 Last updated: 2020-02-21Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Search in DiVA

By author/editor
Ketzer, João Marcelo
By organisation
Department of Biology and Environmental Science
In the same journal
Radiocarbon
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 38 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf