Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics
Microbially mediated anaerobic oxidation of methane (AOM) coupled with sulfate consumption within the sulfate methane transition zone (SMTZ) in marine sediments is a widely recorded biogeochemical reaction and has profound influence on the atmospheric CH sub(4) budget, marine carbon cycle and compos...
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ftnio:oai:dsr.nio.org:2264/4194 2023-05-15T17:12:01+02:00 Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics Peketi, A. Mazumdar, A. Joshi, R.K. Patil, D.J. Srinivas, P.L. Dayal, A.M. 2012 http://drs.nio.org/drs/handle/2264/4194 en eng American Geophysical Union An edited version of this paper was published by AGU. Copyright [2012] AGU. To view the published open abstract, go to http://dx.doi.org/10.1029/2012GC004288 sediments methane transition element compounds seepages Journal Article 2012 ftnio 2012-11-03T00:13:15Z Microbially mediated anaerobic oxidation of methane (AOM) coupled with sulfate consumption within the sulfate methane transition zone (SMTZ) in marine sediments is a widely recorded biogeochemical reaction and has profound influence on the atmospheric CH sub(4) budget, marine carbon cycle and composition of sediment pore fluids. Recognizing the paleo-SMTZs in the marine sediments/rock records can throw light on the variation of paleo-methane fluxes and occurrences of cold seep (H sub(2)S + CH sub(4)) events through geologic time. Here, we present results from carbonate carbon, pyrite sulfur and molybdenum analyses for two sediment cores overlying the methane hydrate deposits in the Bay of Bengal. The results show intimate association of isotopically depleted carbonate carbon and enriched pyrite sulfur, constraining the paleo SMTZ within the sediment column. In addition, anomalous enrichments of Mo concentrations indicate hydrogen sulfide seepage events. Here, we propose a geochemical tool using C-S-Mo systematics to decipher the paleo-SMTZs in marine sediments and rocks. Article in Journal/Newspaper Methane hydrate National Institute of Oceanography, India: Digital Repository Service (DRS@nio) |
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Open Polar |
collection |
National Institute of Oceanography, India: Digital Repository Service (DRS@nio) |
op_collection_id |
ftnio |
language |
English |
topic |
sediments methane transition element compounds seepages |
spellingShingle |
sediments methane transition element compounds seepages Peketi, A. Mazumdar, A. Joshi, R.K. Patil, D.J. Srinivas, P.L. Dayal, A.M. Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics |
topic_facet |
sediments methane transition element compounds seepages |
description |
Microbially mediated anaerobic oxidation of methane (AOM) coupled with sulfate consumption within the sulfate methane transition zone (SMTZ) in marine sediments is a widely recorded biogeochemical reaction and has profound influence on the atmospheric CH sub(4) budget, marine carbon cycle and composition of sediment pore fluids. Recognizing the paleo-SMTZs in the marine sediments/rock records can throw light on the variation of paleo-methane fluxes and occurrences of cold seep (H sub(2)S + CH sub(4)) events through geologic time. Here, we present results from carbonate carbon, pyrite sulfur and molybdenum analyses for two sediment cores overlying the methane hydrate deposits in the Bay of Bengal. The results show intimate association of isotopically depleted carbonate carbon and enriched pyrite sulfur, constraining the paleo SMTZ within the sediment column. In addition, anomalous enrichments of Mo concentrations indicate hydrogen sulfide seepage events. Here, we propose a geochemical tool using C-S-Mo systematics to decipher the paleo-SMTZs in marine sediments and rocks. |
format |
Article in Journal/Newspaper |
author |
Peketi, A. Mazumdar, A. Joshi, R.K. Patil, D.J. Srinivas, P.L. Dayal, A.M. |
author_facet |
Peketi, A. Mazumdar, A. Joshi, R.K. Patil, D.J. Srinivas, P.L. Dayal, A.M. |
author_sort |
Peketi, A. |
title |
Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics |
title_short |
Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics |
title_full |
Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics |
title_fullStr |
Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics |
title_full_unstemmed |
Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics |
title_sort |
tracing the paleo sulfate-methane transition zones and h2s seepage events in marine sediments: an application of c-s-mo systematics |
publisher |
American Geophysical Union |
publishDate |
2012 |
url |
http://drs.nio.org/drs/handle/2264/4194 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_rights |
An edited version of this paper was published by AGU. Copyright [2012] AGU. To view the published open abstract, go to http://dx.doi.org/10.1029/2012GC004288 |
_version_ |
1766068773017616384 |