Biogenic mineralization in the ferromanganese nodules and crusts from the South China Sea

Jiang, Xiaodong; Sun, Xiaoming; Guan, Yao

doi:10.1016/j.jseaes.2017.07.050

Cited by 22 publications

(26 citation statements)

References 52 publications

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“…Microbial fossils (typically ~5 μm) with spherical or rod‐shaped morphologies were observed commonly in nodules (Jiang et al, , ; Nayak et al, ; Wang & Müller, ). Abundant, micron‐scale, spheroidal mineral aggregates (1–8 μm in diameter) composed of nm‐scale, tangled filaments are evident in porous areas of nodules (Figures a and b).…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, materials with abiotic origin within the nodules have high Fe with minor Si, Al, and Mg contents (Wang & Müller, 2009). We interpret these Mn-dominated filamentous aggregates with well-defined morphology as MOB fossils (Jiang et al, 2019;Nayak et al, 2013;Wang & Müller, 2009). MOB fossils (biogenic manganese oxide) are accompanied commonly by Ni (Figures 5b-5d).…”

Section: Mob Fossils Preserved In Nodulesmentioning

confidence: 91%

“…MTB and MOB are two of the most common bacteria in seafloor microbial communities (Dong et al, 2016;Jiang et al, 2019;Liao et al, 2011;Liu et al, 2017;Wang et al, 2010). Both of their fossils are preserved within nodules.…”

Section: Indication Of Biomineralization Contributions To Nodule Formmentioning

confidence: 99%

“…Bacteria related to manganese oxidation have also been detected in nodules (Ehrlich, 1968;Jiang et al, 2017;Shiraishi et al, 2016). Compared to abiotic Mn oxidation, Mn-oxidizing bacteria (MOB) can accelerate Mn oxidation by 5 orders of magnitude (Tebo et al, 2004), which means that microbes can contribute importantly to nodule growth (Jiang et al, 2019(Jiang et al, , 2020Wang & Müller, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…They also generally produce extracellular biogenic manganese oxide (i.e., as MOB fossils) through biomineralization (Tebo et al, 2004;Wang & Müller, 2009). They are considered the main contributors to nodule formation (Jiang et al, 2019(Jiang et al, , 2020Nayak et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Characterization and Quantification of Magnetofossils Within Abyssal Manganese Nodules From the Western Pacific Ocean and Implications for Nodule Formation

Jiang

Zhao

Chou

et al. 2020

Geochem Geophys Geosyst

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Abyssal manganese nodules have been explored widely for their economic potential and paleoenvironmental significance. Debate about whether biogenic or physical‐chemical processes are responsible for their formation remains because of difficulties in quantifying ancient microbiological contributions. To address this question, we investigated microbial fossils in manganese nodules from the western Pacific Ocean by integrating scanning electron microscope, transmission electron microscope, and synchrotron transmission X‐ray microscope observations. Our results suggest that the nodules host abundant fossil biogenic magnetite and manganese‐oxidizing bacteria. These organisms engage in redox reactions or live in environments with redox gradients. By combining magnetic properties and observations of fossil biogenic magnetite morphology, we estimate magnetofossil abundances and further assess fossil biogenic manganese oxide in nodules. Our results imply that manganese nodule formation appears to be dominated by biomineralization with an additional terrestrial contribution. Extensive biomineralization in ultralow‐productivity oceanic environments suggests that manganese nodule formation is an important aspect of biogeochemical cycling in abyssal seafloor environments.

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Section: Resultsmentioning

confidence: 99%