Show simple item record

dc.contributor.author
Meister, Patrick
dc.contributor.author
Wiedling, Johanna
dc.contributor.author
Lott, Christian
dc.contributor.author
Bach, Wolfgang
dc.contributor.author
Kuhfuß, Hanna
dc.contributor.author
Wegener, Gunter
dc.contributor.author
Böttcher, Michael E.
dc.contributor.author
Deusner, Christian
dc.contributor.author
Lichtschlag, Anna
dc.contributor.author
Bernasconi, Stefano M.
dc.contributor.author
Weber, Miriam
dc.date.accessioned
2019-02-22T08:58:49Z
dc.date.available
2019-01-03T03:48:10Z
dc.date.available
2019-02-22T08:58:49Z
dc.date.issued
2018
dc.identifier.other
10.1371/journal.pone.0207305
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/313479
dc.identifier.doi
10.3929/ethz-b-000313479
dc.description.abstract
Seepage of methane (CH4) on land and in the sea may significantly affect Earth’s biogeochemical cycles. However processes of CH4 generation and consumption, both abiotic and microbial, are not always clear. We provide new geochemical and isotope data to evaluate if a recently discovered CH4 seepage from the shallow seafloor close to the Island of Elba (Tuscany) and two small islands nearby are derived from abiogenic or biogenic sources and whether carbonate encrusted vents are the result of microbial or abiotic processes. Emission of gas bubbles (predominantly CH4) from unlithified sands was observed at seven spots in an area of 100 m2 at Pomonte (Island of Elba), with a total rate of 234 ml m-2 d-1. The measured carbon isotope values of CH4 of around -18‰ (VPDB) in combination with the measured δ2H value of -120‰ (VSMOW) and the inverse correlation of δ13C-value with carbon number of hydrocarbon gases are characteristic for sites of CH4 formation through abiogenic processes, specifically abiogenic formation of CH4 via reduction of CO2 by H2. The H2 for methanogenesis likely derives from ophiolitic host rock within the Ligurian accretionary prism. The lack of hydrothermal activity allows CH4 gas to become decoupled from the stagnant aqueous phase. Hence no hyperalkaline fluid is currently released at the vent sites. Within the seep area a decrease in porewater sulphate concentrations by ca. 5 mmol/l relative to seawater and a concomitant increase in sulphide and dissolved inorganic carbon (DIC) indicate substantial activity of sulphate-dependent anaerobic oxidation of methane (AOM). In absence of any other dissimilatory pathway, the δ13C-values between -17 and -5‰ in dissolved inorganic carbon and aragonite cements suggest that the inorganic carbon is largely derived from CH4. The formation of seep carbonates is thus microbially induced via anaerobic oxidation of abiotic CH4.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Public Library of Science
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Anaerobic methane oxidation inducing carbonate precipitation at abiogenic methane seeps in the Tuscan archipelago (Italy)
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2018-12-19
ethz.journal.title
PLoS ONE
ethz.journal.volume
13
en_US
ethz.journal.issue
12
en_US
ethz.pages.start
e0207305
en_US
ethz.size
34 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
San Francisco, CA
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::09601 - Stoll, Heather / Stoll, Heather::08806 - Bernasconi, Stefano (Tit.-Prof.)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::09601 - Stoll, Heather / Stoll, Heather::08806 - Bernasconi, Stefano (Tit.-Prof.)
ethz.date.deposited
2019-01-03T03:48:14Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-02-22T08:59:01Z
ethz.rosetta.lastUpdated
2020-02-15T17:28:17Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Anaerobic%20methane%20oxidation%20inducing%20carbonate%20precipitation%20at%20abiogenic%20methane%20seeps%20in%20the%20Tuscan%20archipelago%20(Italy)&rft.jtitle=PLoS%20ONE&rft.date=2018&rft.volume=13&rft.issue=12&rft.spage=e0207305&rft.au=Meister,%20Patrick&Wiedling,%20Johanna&Lott,%20Christian&Bach,%20Wolfgang&Kuhfu%C3%9F,%20Hanna&rft.genre=article&
 Search via SFX

Files in this item

Thumbnail

Publication type

Show simple item record