Limited Zn and Ni mobility during simulated iron formation diagenesis

Robbins, Leslie J.; Swanner, Elizabeth D.; Lalonde, Stefan V.; Eickhoff, Merle; Paranich, Megan L.; Reinhard, Christopher T.; Peacock, Caroline L.; Kappler, Andreas; Konhauser, Kurt O.

doi:10.1016/j.chemgeo.2015.02.037

Cited by 24 publications

(13 citation statements)

References 65 publications

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“…Robbins et al (2015) took this one step further, demonstrating that during these diagenetic mineral transformations, Ni and Zn remained largely immobile. Robbins et al (2015) took this one step further, demonstrating that during these diagenetic mineral transformations, Ni and Zn remained largely immobile.…”

Section: Precambrian Seawater Composition Biogeochemical Processes Amentioning

confidence: 98%

Using modern ferruginous habitats to interpret Precambrian banded iron formation deposition

Koeksoy

Halama

Konhauser

et al. 2015

International Journal of Astrobiology

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Early Earth processes are typically identified through the study of mineralogical, elemental and isotopic features in the rock record, including Precambrian banded iron formations (BIF). However, postdepositional processes often obscure the primary geochemical signals, making the use of BIF as proxies for paleo-seawater and the paleo-biosphere potentially imprecise. Thus, alternative approaches are required to complement the information gained from the rock record in order to fully understand the distinctive biogeochemical processes on ancient Earth. Simulating these conditions in the laboratory is one approach, but this approach can never fully replicate the complexity of a natural environment. Therefore, finding modern environments with a unique set of geochemical and microbiological characteristics to use as analogues for BIF depositional environments can provide invaluable information. In this review, we provide an overview of the chemical, physical and biological parameters of modern, ferruginous lakes that have been used as analogue BIF environments.

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Section: Precambrian Seawater Composition Biogeochemical Processes Amentioning

confidence: 98%

Using modern ferruginous habitats to interpret Precambrian banded iron formation deposition

Koeksoy

Halama

Konhauser

et al. 2015

International Journal of Astrobiology

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“…The 12 sequence of events linked to the replacement process may be predictable, and in this regard, 13 paragenetic relations between the cherty matrix (recrystallized amorphous silica) and dolomite 14 offer insights into establishing the time during which silicification of the carbonates occurred 15 (Dapples, 1979). Our goals here were to investigate the nature of silicification in the peritidal (i.e., Broderick, 1920), Goodwin (1956) subdivided this formation into four members: the Basal 28 Conglomerate, the Lower and Upper Cherty Member(s), and the Upper Limestone.…”

Section: Introductionmentioning

confidence: 98%

“…Broad consensus is that REE SN and some 10 transition metal signatures of ancient stromatolites are useful in the pursuit of an interpretable 11 record of ancient seawater chemistry (see Riding et al, 2014). 12 An inherent difficulty with such models, however, is that Holocene stromatolites were 13 affected only by shallow burial diagenesis. As such, it remains unquantified to what extent a far 14 more complex diagenetic history within their ancient analogues overprinted original chemical 15 signatures.…”

Section: Introductionmentioning

confidence: 99%

Chemical and textural overprinting of ancient stromatolites: Timing, processes, and implications for their use as paleoenvironmental proxies

Petrash

Robbins

Shapiro

et al. 2016

Precambrian Research

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1Shale-normalized Rare Earth Element (REE SN ) patterns and transition metal abundances in 2 banded iron formations (BIF) and shales have long been used as paleoenvironmental proxies to 3 investigate the evolving geochemistry of Precambrian oceans. Apparent similarities between the 4 REE SN of modern stromatolites and contemporary seawater values also mean that some ancient 5 stromatolites could record paleo-ocean chemistry. To test this hypothesis, we present 6 comparative mineralogical, textural, and spectral analyses of multifurcate, silicified and iron 7 oxide/carbonate-rich, stromatolites from the ca.1.88 Ga Gunflint Formation (Ontario, Canada). 8Previous studies show that these organo-sedimentary structures represent the initiation of 9 shallow marine sedimentation in the Animikie Basin on the southern tip of the Superior 10 Province. We present evidence that these structures were originally stabilized by aragonite and 11Mg-bearing carbonates. Fabrics indicative of stromatolite accretion under local hypersaline 12 conditions are also present, with La anomalies suggestive of laterally variable freshwater runoff. 13 The admixture of partially evaporated seawater and silica-oversaturated deep seawater led to 14 pervasive silicification of metastable carbonates and preservation of less soluble early diagenetic 15 carbonate cements. Bulk rock transition metal contents point to lateral variability and dissimilar 16 partitioning and fractionation during mineral formation, yet Ce anomalies amongst samples are 17 similar. Considering the pronounced differences between the REE partitioning between Fe 18 oxyhydroxide precipitates and carbonates, our results point to hematite and siderite as secondary 19 minerals that postdate the stabilization of these structures by carbonates and silica. Stratabound 20 relations of the Fe-rich stromatolites with diabase sills and dikes indicate that the pore water 21 fluids evolved towards a localized state of hematite and siderite oversaturation towards the 22 Mesoproterozoic. If hematite and siderite are both early diagenetic phases, then the Ce anomalies 23 of these stromatolites may be a poor measure of the redox conditions of the shallow areas of the 24 Animikie Basin at the time of accretion. 25 3

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“…The addition of organic carbon to these diagenetic experiments led to the formation of reduced Fe minerals in the post-diagenetic capsules, mainly a mixture of hematite, magnetite, and siderite, a composition broadly consistent with the modern-day mineralogy of IF. Robbins et al (2015) took this one step further, demonstrating that, during these diagenetic mineral transformations, Ni remains largely immobile. In fact, more than 91% of Ni was retained following the mineral transformations characteristic of these diagenetic experiments.…”

Section: Nickel Mobility During Diagenesismentioning

confidence: 99%

The Archean Nickel Famine Revisited

et al. 2015

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Iron formations (IF) preserve a history of Precambrian oceanic elemental abundance that can be exploited to examine nutrient limitations on early biological productivity. However, in order for IF to be employed as paleomarine proxies, lumped-process distribution coefficients for the element of interest must be experimentally determined or assumed. This necessitates consideration of bulk ocean chemistry and which authigenic ferric iron minerals controlled the sorption reactions. It also requires an assessment of metal mobilization reactions that might have occurred in the water column during particle descent and during post-depositional burial. Here, we summarize recent developments pertaining to the interpretation and fidelity of the IF record in reconstructions of oceanic trace element evolution. Using an updated compilation, we reexamine and validate temporal trends previously reported for the nickel content in IF (see Konhauser et al., 2009). Finally, we reevaluate the consequences of methanogen Ni starvation in the context of evolving views of the Archean ocean-climate system and how the Ni famine may have ultimately facilitated the rise in atmospheric oxygen.

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Limited Zn and Ni mobility during simulated iron formation diagenesis

Cited by 24 publications

References 65 publications

Using modern ferruginous habitats to interpret Precambrian banded iron formation deposition

Using modern ferruginous habitats to interpret Precambrian banded iron formation deposition

Chemical and textural overprinting of ancient stromatolites: Timing, processes, and implications for their use as paleoenvironmental proxies

The Archean Nickel Famine Revisited

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