Insights from modern diffuse-flow hydrothermal systems into the origin of post-GOE deep-water Fe-Si precipitates

Dong, Aiguo; Sun, Zhilei; Kendall, Brian; Izon, Gareth; Cao, Hong; Li, Zhihong; Ma, Xiaoming; Yin, Xijie; Qiu, Zhen; Zhu, Xiangkun; Bekker, Andrey; Poulton, Simon W.

doi:10.1016/j.gca.2021.10.001

Cited by 4 publications

(9 citation statements)

References 66 publications

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“…As illustrated in Figure 11, the Fe isotope compositions (−1.47 to 0.82‰) of Fe‐Si oxyhydroxide deposits at the ultraslow‐spreading SWIR resemble those reported for other modern deposits from the Jan Mayen vent fields (Moeller et al., 2014), the Loihi Seamount (Rouxel et al., 2018), and additional locations along the SWIR (Dong et al., 2022). Meanwhile, global compilations of δ 56 Fe in IFs reveal a statistically significant difference between the Archean and Proterozoic IFs (Figure 11).…”

Section: Discussionsupporting

confidence: 66%

“…As illustrated in Figure 11, the Fe isotope compositions ( 1.47 to 0.82‰) of Fe-Si oxyhydroxide deposits at the ultraslow-spreading SWIR resemble those reported for other modern deposits from the Jan Mayen vent fields (Moeller et al, 2014), the Loihi Seamount (Rouxel et al, 2018), and additional locations along the SWIR (Dong et al, 2022). Meanwhile, global compilations of δ 56 Fe in IFs reveal a statistically significant difference between the (Dong et al, 2022), (2) the Loihi Seamount (Rouxel et al, 2018), and (3) the Jan Mayen vent fields (Moeller et al, 2014); Proterozoic IFs, including (4) 2.4 Ga Hotazel IFs (Wang et al, 2023), (5) 2.45Ga Joffre IFs (Haugaard et al, 2016), (6) 2.46 Ga Griquatown IFs (Thibon et al, 2019;Wang et al, 2023), (7) 0.64-2.48 Ga IFs (Planavsky et al, 2012); Archean IFs, including (8) 2.5-2.56 Ga IFs from China (Dai et al, 2017;Z. H. Li et al, 2008Wang et al, 2023), ( 9) 2.5-3.24 Ga IFs (Planavsky et al, 2012), (10) 3.24 Ga Manzimnyama IFs (Satkoski et al, 2015), (11) 3.46 Ga Marble Bar Chert (W. , (12) 3.7 Ga Isua IFs (Czaja et al, 2013;Dauphas et al, 2007;Wang et al, 2023), ( 13) 3.7-3.8 Ga SW Greenland IFs (Dauphas et al, 2004).…”

Section: Implications For the Origin Of Ancient Banded Ifssupporting

confidence: 64%

“…Also shown are Fe isotope compositions of ancient iron formations (IFs) worldwide for comparison. Data sources include modern Fe‐Si oxide deposits from (1) the Southwest Indian Ridge (Dong et al., 2022), (2) the Loihi Seamount (Rouxel et al., 2018), and (3) the Jan Mayen vent fields (Moeller et al., 2014); Proterozoic IFs, including (4) 2.4 Ga Hotazel IFs (Wang et al., 2023), (5) 2.45Ga Joffre IFs (Haugaard et al., 2016), (6) 2.46 Ga Griquatown IFs (Thibon et al., 2019; Wang et al., 2023), (7) 0.64–2.48 Ga IFs (Planavsky et al., 2012); Archean IFs, including (8) 2.5–2.56 Ga IFs from China (Dai et al., 2017; Z. H. Li et al., 2008, 2012; Wang et al., 2023), (9) 2.5–3.24 Ga IFs (Planavsky et al., 2012), (10) 3.24 Ga Manzimnyama IFs (Satkoski et al., 2015), (11) 3.46 Ga Marble Bar Chert (W. Li et al., 2013), (12) 3.7 Ga Isua IFs (Czaja et al., 2013; Dauphas et al., 2007; Wang et al., 2023), (13) 3.7–3.8 Ga SW Greenland IFs (Dauphas et al., 2004). The vertical gray bar represents the δ 56 Fe range (0.07–0.14‰) of the MORB (Teng et al., 2013).…”

Section: Discussionmentioning

confidence: 99%

“…The wide range of Fe/Si ratios (0.35–12.69; Table 1) is accompanied by a negative correlation between Fe and Si in the Fe‐Si oxyhydroxides. This could be because Si 4+ is primarily incorporated into Fe oxyhydroxides during co‐precipitation of Fe and Si when Fe/Si >1 (Dong et al., 2022) or because Si precipitation is caused by conductive cooling of low‐temperature hydrothermal fluids (Fe/Si < 1), where Fe 2+ oxidation is limited (Dekov et al., 2007; Sun et al., 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies have advanced our understanding of the Fe isotope composition in seafloor hydrothermal Fe oxyhydroxides (Dong et al., 2022; Moeller et al., 2014; Rouxel et al., 2018). For instance, Moeller et al.…”

Section: Introductionmentioning

confidence: 99%

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Geochemical and Sr‐Nd‐Pb‐Fe Isotopic Constraints on the Formation of Fe‐Si Oxyhydroxide Deposits at the Ultraslow‐Spreading Southwest Indian Ridge

Li,

Sun,

et al. 2024

Geochem Geophys Geosyst

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Modern Fe‐Si oxyhydroxide deposits occur in global marine hydrothermal vent sites. Despite their role as biogenic substrates and potential ore resources, much remains unknown about their formation processes. Here, we apply analyses of major and trace elements as well as Sr‐Nd‐Pb‐Fe isotopes combined with 238U‐230Th dating to Fe‐Si oxyhydroxides obtained from several hydrothermal fields along the Southwest Indian Ridge. These mineralized oxyhydroxides primarily consist of poorly crystalline two‐line ferrihydrite and amorphous opal‐A, with lesser amounts of nontronite and birnessite. The ubiquitous and characteristic Fe‐rich ultrastructures in the oxyhydroxides directly indicate microbial activity. The 238U‐230Th dating constrains their crystallization ages from ca. 11,873 to 384 years old. The seawater‐like 87Sr/86Sr and varying 143Nd/144Nd ratios underline a high proportion of seawater mixed with hydrothermal fluids. The radiogenic Pb isotopic patterns suggest a primary derivation of Pb leached from substrate basalts and to a lesser extent Pb from seawater. Stable iron isotopic compositions for different oxyhydroxides display a remarkable range between −1.47 and 0.82‰, which were interpreted as reflecting the fractionation processes during the formation of the deposits under evolving depositional redox conditions. The partial oxidation of Fe(II) and the subsurface removal of isotopically heavy Fe oxyhydroxides are suggested to play a vital role in shifting the Fe isotopic signature toward more negative values. Given that these Fe‐Si oxyhydroxide deposits exhibit features similar to certain ancient iron formations (IFs), Fe isotope systematics of these deposits may hold significant potential for fingerprinting the biological Fe oxidation processes that drove IF deposition on early Earth.

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Section: Discussionsupporting

confidence: 66%

Section: Implications For the Origin Of Ancient Banded Ifssupporting

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geochemical and Sr‐Nd‐Pb‐Fe Isotopic Constraints on the Formation of Fe‐Si Oxyhydroxide Deposits at the Ultraslow‐Spreading Southwest Indian Ridge

Li,

Sun,

et al. 2024

Geochem Geophys Geosyst

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Genesis of Devonian volcanic-associated Lahn-Dill-type iron ores – part II: trace element fractionation evidences diffuse fluid venting

Schmitt,

Kirnbauer,

Angerer

et al. 2024

Miner Deposita

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The iron (Fe)-oxide deposits of the Lahn-Dill-type are composed of haematite-quartz and rare siderite-haematite ores. These ores formed as marine chemical sediments on top of volcaniclastic rocks near the Middle to Late Devonian boundary (∼ 380 Ma). As such, their trace element fractionation patterns provide key information on venting style, ocean chemistry, particle-solution interaction, and depositional environment at the time of ore formation. This study combines WDXRF and ICP-MS/OES whole-rock geochemistry with complementary in-situ LA-ICP-MS analysis, and TEM element mapping of ore samples from the Fortuna Mine (Rhenish Massif, Germany). In-situ measurments were conducted on quartz-haematite, haematite, and siderite-haematite microdomains. Bulk major element contents of the ores indicate (volcani)clastic contamination and post-depositional hydrothermal alteration. Microdomain trace element distributions reveal four different trace element signatures, which are related to: (1) syngenetic apatite formation due to sorption of P and REY from seawater; (2) Fe-(oxyhydr)oxide-specific trace element scavenging and fractionation within the seawater column; (3) diagenetic Fe(III) reduction and trace element mobilisation in pore water; and (4) simultaneous deposition of (volcani)clastic material and Fe-(oxyhydr)oxides. These results show that Lahn-Dill-type iron ore formation resulted from mixing of a low-temperature vent fluid with ambient seawater at high seawater to vent fluid ratios. This likely was related to an environment in which diffuse venting dominated over focused venting, and in which quick Fe-particle precipitation led to formation of haematite-quartz ores. Local diagenetic Fe(III) reduction resulted in post-depositional siderite-haematite ore formation during which trace elements were partially remobilised in pore water.

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Fe-Pb-Sr isotopic systematics of the hydrothermal chimney from the Minami-Ensei hydrothermal field, middle Okinawa Trough: Constraint on hydrothermal mineralization process in incipient back-arc basin

Xia

Sun

2023

Ore Geology Reviews

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Insights from modern diffuse-flow hydrothermal systems into the origin of post-GOE deep-water Fe-Si precipitates

Cited by 4 publications

References 66 publications

Geochemical and Sr‐Nd‐Pb‐Fe Isotopic Constraints on the Formation of Fe‐Si Oxyhydroxide Deposits at the Ultraslow‐Spreading Southwest Indian Ridge

Geochemical and Sr‐Nd‐Pb‐Fe Isotopic Constraints on the Formation of Fe‐Si Oxyhydroxide Deposits at the Ultraslow‐Spreading Southwest Indian Ridge

Genesis of Devonian volcanic-associated Lahn-Dill-type iron ores – part II: trace element fractionation evidences diffuse fluid venting

Fe-Pb-Sr isotopic systematics of the hydrothermal chimney from the Minami-Ensei hydrothermal field, middle Okinawa Trough: Constraint on hydrothermal mineralization process in incipient back-arc basin

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