2021
DOI: 10.1029/2021gc010133
|View full text |Cite
|
Sign up to set email alerts
|

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

Abstract: 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 dissolve… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

0
5
0

Year Published

2022
2022
2024
2024

Publication Types

Select...
5

Relationship

1
4

Authors

Journals

citations
Cited by 6 publications
(5 citation statements)
references
References 83 publications
(151 reference statements)
0
5
0
Order By: Relevance
“…Greigite is considered to be metastable but has been reported to be generated and preserved in diverse environmental settings with ages ranging from the Ediacaran to the Holocene, although the greigite could be younger than its host sediment. Environments include organic‐rich lacustrine and marine sediments, restricted anoxic basins, gas hydrate systems, and hydrothermal/cold seep environments (e.g., Badesab et al., 2020; Dewangan et al., 2013; Dong et al., 2013; Greve et al., 2021; Horng, 2018; Housen & Musgrave, 1996; Kars, Greve, & Zerbst, 2021; Kars, Köster, Henkel, et al., 2021; Kelder et al., 2018; Krs et al., 1990; Larrasoaña et al., 2007; Reynolds et al., 1994; Roberts et al., 1996; Sagnotti & Winkler, 1999; Snowball, 1991; Vasiliev et al., 2007, 2008).…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Greigite is considered to be metastable but has been reported to be generated and preserved in diverse environmental settings with ages ranging from the Ediacaran to the Holocene, although the greigite could be younger than its host sediment. Environments include organic‐rich lacustrine and marine sediments, restricted anoxic basins, gas hydrate systems, and hydrothermal/cold seep environments (e.g., Badesab et al., 2020; Dewangan et al., 2013; Dong et al., 2013; Greve et al., 2021; Horng, 2018; Housen & Musgrave, 1996; Kars, Greve, & Zerbst, 2021; Kars, Köster, Henkel, et al., 2021; Kelder et al., 2018; Krs et al., 1990; Larrasoaña et al., 2007; Reynolds et al., 1994; Roberts et al., 1996; Sagnotti & Winkler, 1999; Snowball, 1991; Vasiliev et al., 2007, 2008).…”
Section: Introductionmentioning
confidence: 99%
“…Thermal maturation due to burial typically drives progressive diagenesis: the continual loss of fine-grained magnetite and gradual pyritization of greigite. These processes are argued to occur from the subsurface to depths corresponding to a burial temperature of ∼60°C (e.g., Aubourg et al, 2012;Kars, Greve, & Zerbst, 2021;Kars, Köster, Henkel, et al, 2021;Kars et al, 2012Kars et al, , 2014Musgrave et al, 2019).…”
mentioning
confidence: 99%
“…High‐pressure flows result in mechanically weak areas (∼800–1050 mbsf) beneath the décollement zone (Heuer et al., 2020; Hirose et al., 2021), where Fe‐ and Mn‐rich hydrothermal fluids intrude via lateral advection (LaRowe et al., 2020; Torres et al., 2015). Such environments favor Fe‐Mn (oxyhydr)oxide formation, which explains the elevated contents of Mn and Fe oxides between 800 and 900 mbsf (Figure S3 in Supporting Information ) (Kars et al., 2021; Torres et al., 2015). Meanwhile, hydrothermal fluids carry large amounts of trace metals (Wheat et al., 2002), which are, in turn, adsorbed onto the Fe‐Mn (oxyhydr)oxides.…”
Section: Discussionmentioning
confidence: 99%
“…The porewater sulfate and methane profiles display a reverse SMTZ sulfides (Figure 2a, Figure S4 in Supporting Information S1; Heuer et al, 2020;Kars et al, 2021;Köster et al, 2021), where iron oxides are typically transformed into Fe sulfides (e.g., Riedinger et al, 2005Riedinger et al, , 2017. During this alteration, previously adsorbed Mo is released into porewater (Figure 4).…”
Section: Mo Behavior Across the Smtzmentioning
confidence: 99%
See 1 more Smart Citation