Naturally occurring, microbially induced smectite-to-illite reaction

Kim, Jin-Wook; Dong, Hailiang; Yang, Kiho; Park, Hanbeom; Elliott, W. Crawford; Spivack, Arthur J.; Koo, Tae Hee; Kim, Gil Young; Morono, Yuki; Henkel, Susann; Inagaki, Fumio; Zeng, Qiang; Hoshino, Takao; Heuer, Verena B

doi:10.1130/g46122.1

Cited by 39 publications

(23 citation statements)

References 46 publications

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“…However, the hyperfine parameters for most of the recorded spectra point towards kaolinite (Al4Si4O10(OH)8) to be a relatively abdundant candidate which usually occurs with a minor substitution of Fe for Al (Murad, 1998). The appearance of kaolinite was also confirmed by XRD analyses (Kim et al, 2019).…”

Section: Accepted Articlementioning

confidence: 79%

“…Current studies indicate that structural Fe(III) in phyllosilicates can be reduced microbially (e.g., Jung et al, 2019;Kim et al, 2004;Vorhies & Gaines, 2009), although this Fe pool is thought to be reactive only on timescales of 10 2 to 10 5 of years (Canfield et al, 1992). More recently, Kim et al (2019) showed that microbial reduction of structural Fe(III) in smectite promotes the smectite-to-illite transition at Site C0023 even at relatively low temperature and pressure conditions. Thus, the hydroxylamine-HCl-extracted Fe pool represents the part of phyllosilicate Fe(III) that has been preserved during burial and can support microbial Fe reduction as suggested by Kim et al (2019).…”

Section: Accepted Articlementioning

confidence: 99%

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Evolution of (Bio‐)Geochemical Processes and Diagenetic Alteration of Sediments Along the Tectonic Migration of Ocean Floor in the Shikoku Basin off Japan

Köster

Kars

Schubotz

et al. 2021

Geochem Geophys Geosyst

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 The tectonic migration of ocean floor led to a transition from an organic carbon-starved to an elevated organic carbon burial environment  Diagenetic transformation of iron oxides into pyrite within the carbon-lean sediments occurred several millions of years after deposition Accepted ArticleThis article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

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Section: Accepted Articlementioning

confidence: 79%

Section: Accepted Articlementioning

confidence: 99%

Evolution of (Bio‐)Geochemical Processes and Diagenetic Alteration of Sediments Along the Tectonic Migration of Ocean Floor in the Shikoku Basin off Japan

Köster

Kars

Schubotz

et al. 2021

Geochem Geophys Geosyst

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“…Since iron at relevant depths is associated with clay minerals rather than with oxyhydroxide phases, it appears that its reduction could have contributed to clay mineral alteration in a direct or indirect way (Kim et al, 2019;Kostka et al, 2002;Liu et al, 2016;Liu et al, 2017;Pentráková et al, 2013;Vorhies and Gaines, 2009). Thus, clay mineral…”

Section: Diagenetic Reactions In Response To Seawater Intrusionmentioning

confidence: 99%

Effects of postglacial seawater intrusion on sediment geochemical characteristics in the Romanian sector of the Black Sea

Ruffine

Deusner

Haeckel

et al. 2021

Marine and Petroleum Geology

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Pore water and sediment geochemistry in the western Black Sea were investigated on long Calypso piston core samples. Using this type of coring device facilitates the recovery of the thick sediment record necessary to analyze transport-reaction processes in response to the postglacial sea-level rise and intrusion of Mediterranean salt water 9 ka ago, and thus, to better characterize key biogeochemical processes and process changes in response to the shift from lacustrine to marine bottom water composition. Complementary data indicate that organic matter degradation occurs in the upper 15 m of the sediment column. However, sulfate reduction coupled with Anaerobic Methane Oxidation (AOM) is the dominant electron-accepting process and characterized by a shallow Sulfate Methane Transition Zone (SMTZ). Net silica dissolution, total alkalinity (TA) maxima and carbonate peaks are found at shallow depths. Pore water profiles clearly show the uptake of K+, Mg2+ and Na + by, and release of Ca2+ and Sr2+ from the heterogeneous lacustrine sediments, which is likely controlled by chemical reactions of silicate minerals and changes in clay mineral composition. Iron (Fe2+) and manganese (Mn2+) maxima largely coincide with Ca2+ peaks and suggest a close link between Fe2+, Mn2+ and Ca2+ release. We hypothesize that the Fe2+ maxima below the SMTZ result from deep Fe3+ reduction linked to organic matter degradation, either driven by DOC escaping from the shallow sulfate reduction zone or slow degradation of recalcitrant POC. The chemical analysis of dissolved and solid iron species indicates that iron is essentially associated with clay minerals, which suggests that microbial iron reduction is influenced by clay mineral composition and bioavailability of clay mineral-bound Fe(III). Overall, our study suggests that postglacial seawater intrusion plays a major role in shaping redox zonation and geochemical profiles in the lacustrine sediments of the Late Quaternary.Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site. Highlights► Geochemical analyses highlight multiple diagenesis processes occurring in the sediment. ► Intense methane seepages and organic matter degradation contribute to the sulfate reduction. ► Chemical of dissolved and mineral iron species indicate that iron is associated with clay minerals. ► In response to seawater intrusion, ion exchange, dissolution and reverse weathering reactions change the composition of clay constituting the sediment.

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“…MZ 3 (720-890 mbsf) is characterized by downward decreasing smectite contents from 80 (at ∼600 mbsf) to 20 wt% (at ∼850 mbsf) in association with progressive illitization (Kim et al, 2019). However, porewater K + is low (<1 mM) in this interval (Heuer, Inagaki, Morono, Kubo, Maeda, Bowden, et al, 2017;Kim et al, 2019), although this is the present-day situation, and might not have been the case during episodic short-term pulses of hydrothermal fluids. Kim et al (2019) suggested that thermogenic oxidative conditions exist below 700 mbsf and above 80°C to initiate abiotic illitization.…”

Section: Role Of Burial Temperature and Fluidsmentioning

confidence: 93%

Influence of Early Low‐Temperature and Later High‐Temperature Diagenesis on Magnetic Mineral Assemblages in Marine Sediments From the Nankai Trough

Kars

Köster

Henkel

et al. 2021

Geochem Geophys Geosyst

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Dissimilatory iron reduction plays an important role in iron cycling in reducing environments (e.g., Lovley, 1991). Detrital and authigenic iron oxides are used by microbes as electron acceptors to oxidize organic matter, releasing dissolved iron (Fe 2+ ) into porewater. In marine environments, early formation of authigenic iron oxides results from Fe 2+ diffusion into the overlying oxic and nitrogenous zones. In underlying sulfidic environments, dissolved iron and iron-bearing solid phases react with dissolved sulfide (HS − /H 2 S) to form iron sulfides. HS − /H 2 S results from organoclastic sulfate reduction associated with organic matter decomposition (e.g., R. A. Berner, 1981;Jørgensen et al., 2019) and microbial anaerobic oxidation of methane (AOM) above and at the sulfate-methane transition (SMT) zone (e.g., Knittel & Boetius, 2009;Treude et al., 2005). These processes strongly affect iron-bearing magnetic minerals, which affects the magnetic properties of sediments and sedimentary rocks (Roberts, 2015). Iron reduction and the subsequent incorporation of released Fe 2+ into iron sulfides, is an important mechanism responsible for magnetic mineral alteration. Destruction of detrital and biogenic ferrimagnetic minerals during diagenesis can destroy primary magnetic records. Limited exposure of sediments to dissolved sulfide can prevent pyritization (e.g., R. A. Berner, 1984;Canfield & Berner, 1987) and favor preservation of metastable iron sulfide precursors such as greigite (Kao et al., 2004). Greigite is ferrimagnetic and can carry a secondary magnetization that can poten-Abstract Diagenesis can have a major impact on sedimentary mineralogy. Primary magnetic mineral assemblages can be modified significantly by dissolution or by formation of new magnetic minerals during early or late diagenesis. At International Ocean Discovery Program Site C0023, which was drilled in the protothrust zone of the Nankai Trough during Expedition 370, offshore of Shikoku Island, Japan, non-steady state conditions have produced a complex sequence of magnetic overprints. Detailed rock magnetic measurements, which characterize magnetic mineral assemblages in terms of abundance, grain size, and composition, were conducted to assess magnetic mineral alteration and diagenetic overprinting. Four magnetic zones (MZs) are identified down-core from ∼200 to 1,100 m below sea floor based on rock magnetic variations. MZ 1 is a high magnetic intensity zone that contains ferrimagnetic greigite, which formed at shallow depths and is preserved because of rapid sedimentation. MZs 2 and 4 are low magnetic intensity zones with fewer magnetic minerals, mainly coarse-grained (titano-)magnetite and hematite. This magnetic mineral assemblage is a remnant of a more complex assemblage that was altered diagenetically a few million years after deposition when the site entered the Nankai Trough. MZ 3 is a high magnetic intensity zone between MZs 2 and 4. It contains authigenic single-domain magnetic particles that probably formed from fluids that circulat...

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Naturally occurring, microbially induced smectite-to-illite reaction

Cited by 39 publications

References 46 publications

Evolution of (Bio‐)Geochemical Processes and Diagenetic Alteration of Sediments Along the Tectonic Migration of Ocean Floor in the Shikoku Basin off Japan

Evolution of (Bio‐)Geochemical Processes and Diagenetic Alteration of Sediments Along the Tectonic Migration of Ocean Floor in the Shikoku Basin off Japan

Effects of postglacial seawater intrusion on sediment geochemical characteristics in the Romanian sector of the Black Sea

Influence of Early Low‐Temperature and Later High‐Temperature Diagenesis on Magnetic Mineral Assemblages in Marine Sediments From the Nankai Trough

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