Variations of methane induced pyrite formation in the accretionary wedge sediments offshore southwestern Taiwan

Lim, Yee Cheng; Lin, Shu-Yen; Yang, T. F.; Chen, Yue‐Gau; Liu, Char‐Shine

doi:10.1016/j.marpetgeo.2011.04.004

Cited by 83 publications

(54 citation statements)

References 82 publications

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“…1), indicating gas hydrate in the strata (Suess et al, 2005;Ge et al, 2010). In addition to authigenic carbonates, chemosynthetic communities were visually observed, and shallow SMTZS were observed in this area (Lim et al, 2011;Feng and Chen, 2015b). Gas hydrate was recovered from drilling sites near the study area at 600e1100 m depth during the scientific expedition conducted by the China Marine Geological Survey in 2013 (Zhang et al, 2014).…”

Section: Study Areamentioning

confidence: 96%

“…In oxic and suboxic marine sediments, the reduced sulfur and organic carbon contents typically show a positive correlation with an average S/C ratio of 0.36 (Berner, 1982). The S/C ratios are high in euxinic condition, generally greater than 2.05, just like the Black Sea (Leventhal, 1983), when compared to the freshwater condition where sulfate is limiting (Lim et al, 2011). Moreover, in organicallylimited and methane-rich environment, where AOM is the predominant process, AOM induced the pyrite formation may significantly increase the S/C ratio of sediments (Lim et al, 2011;Sato et al, 2012).…”

Section: Anaerobic Oxidation Of Methane (Aom) Signals In the Sedimentsmentioning

confidence: 99%

“…Therefore, the sedimentary organic carbon supply is commonly the primary control on pyrite formation (Canfield, 1991;Jørgensen, 1982;Lim et al, 2011;Tribovillard et al, 2015). However, in methane-rich environment, AOM at the SMTZ could produce additional hydrogen sulfide that is ultimately fixed as sulfide minerals, such as sulfur, S o ; iron monosulfides, FeS; and pyrite, FeS 2 in sediments.…”

Section: Pyrite and Pyrite Sulfur Isotope As A Proxy Of Anaerobic Oximentioning

confidence: 99%

“…However, owing to the ephemeral of elemental sulfur and FeS minerals, so that it is pyrite usually survives as the main phase of the sulfide minerals (Borowski et al, 2013). Therefore, the content of sulfide minerals near the SMTZ could indicate the historical AOM and methane migration (Lim et al, 2011). Moreover, enrichments in sulfate phases (mainly barite) based on bulk sediment Ba profiles has also been used to assess the temporal variation of methane seeping (Dickens, 2001).…”

Section: Pyrite and Pyrite Sulfur Isotope As A Proxy Of Anaerobic Oximentioning

confidence: 99%

“…The supply of organic carbon is the primary control on sulfate reduction and reduced sulfur contents in marine sediments (Canfield, 1991;Jørgensen, 1982;Lim et al, 2011). In oxic and suboxic marine sediments, the reduced sulfur and organic carbon contents typically show a positive correlation with an average S/C ratio of 0.36 (Berner, 1982).…”

Section: Anaerobic Oxidation Of Methane (Aom) Signals In the Sedimentsmentioning

confidence: 99%

See 4 more Smart Citations

Using sediment geochemistry to infer temporal variation of methane flux at a cold seep in the South China Sea

Niu

Dong

Chen

et al. 2016

Marine and Petroleum Geology

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Section: Study Areamentioning

confidence: 96%

Section: Anaerobic Oxidation Of Methane (Aom) Signals In the Sedimentsmentioning

confidence: 99%

Section: Pyrite and Pyrite Sulfur Isotope As A Proxy Of Anaerobic Oximentioning

confidence: 99%

Section: Pyrite and Pyrite Sulfur Isotope As A Proxy Of Anaerobic Oximentioning

confidence: 99%

Section: Anaerobic Oxidation Of Methane (Aom) Signals In the Sedimentsmentioning

confidence: 99%

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Using sediment geochemistry to infer temporal variation of methane flux at a cold seep in the South China Sea

Niu

Dong

Chen

et al. 2016

Marine and Petroleum Geology

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Coupled C–S–Fe geochemistry in a rapidly accumulating marine sedimentary system: Diagenetic and depositional implications

Peketi

Mazumdar

Joao

et al. 2015

Geochem Geophys Geosyst

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In the present study, we have investigated the C–S–Fe systematics in a sediment core (MD161‐13) from the Krishna‐Godavari (K‐G) basin, Bay of Bengal. The core covers the late Holocene period with high overall sedimentation rate of ∼573 cm kyr−1. Pore fluid chemical analyses indicate that the depth of the present sulfate methane transition zone (SMTZ) is at ∼6 mbsf. The (ΔTA + ΔCa + ΔMg)/ ΔSO42− ratios suggest that both organoclastic degradation and anaerobic oxidation of methane (AOM) drive sulfate reduction at the study site. The positive correlation between total organic carbon content (TOC) and chromium reducible sulfur (CRS) content indicates marked influence of organoclastic sulfate reduction on sulfidization. Coupled occurrence of 34S‐enriched iron sulfide (pyrite) with 12C‐enriched authigenic carbonate zones is the possible records of paleo‐sulfate methane transition zones where AOM‐driven‐focused sulfate reduction was likely fueled by sustained high methane flux from underlying gas‐rich zone. Aluminum normalized poorly reactive iron (FePR/Al) and La/Yb ratios suggest increasing contribution from Deccan basalts relative to that of Archean‐Proterozoic granitic complex in sediment flux of Krishna‐Godavari basin during the last 4 kyr.

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Unusual Magnetic Properties of Sedimentary Pyrrhotite in Methane Seepage Sediments: Comparison With Metamorphic Pyrrhotite and Sedimentary Greigite

Horng

2018

JGR Solid Earth

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Interpretation of the paleomagnetic and environmental signals carried by magnetic iron sulfide minerals depends on the ability to diagnose their magnetic properties and to recognize their origin. Greigite (Fe3S4) and hexagonal pyrrhotite (with variable composition between Fe9S10 and Fe11S12) often form authigenically in sulfidic and methanic sedimentary environments, whereas monoclinic pyrrhotite (Fe7S8) occurs widely in igneous and metamorphic rocks so that erosion of such rocks can give rise to deposition of detrital pyrrhotite in sediments. In this study, low‐ and high‐field, and low‐, room temperature, and high‐temperature magnetization data are presented to demonstrate that these magnetic iron sulfide minerals have contrasting magnetic properties that enable their identification, particularly when assisted by mineralogical characterizations. The results presented here should have wide applicability in sedimentary magnetic studies.

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Variations of methane induced pyrite formation in the accretionary wedge sediments offshore southwestern Taiwan

Cited by 83 publications

References 82 publications

Using sediment geochemistry to infer temporal variation of methane flux at a cold seep in the South China Sea

Using sediment geochemistry to infer temporal variation of methane flux at a cold seep in the South China Sea

Coupled C–S–Fe geochemistry in a rapidly accumulating marine sedimentary system: Diagenetic and depositional implications

Unusual Magnetic Properties of Sedimentary Pyrrhotite in Methane Seepage Sediments: Comparison With Metamorphic Pyrrhotite and Sedimentary Greigite

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