Tracing the composition, fluid source and formation conditions of the methane-derived authigenic carbonates in the Gulf of Cadiz with rare earth elements and stable isotopes

Wang, Shuhong; Magalhães, Vítor; Pinheiro, Luís Menezes; Jinlong, LIU; Yan, Wen

doi:10.1016/j.marpetgeo.2015.08.022

Cited by 23 publications

(10 citation statements)

References 81 publications

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“…In Fig. 6, we investigate the relationships between Ce/Ce* and La/La* in modern cold seep carbonates worldwide (Feng et al, 2008(Feng et al, , 2009a(Feng et al, , 2010Himmler et al, 2010;Birgel et al, 2011;Rongemaille et al, 2011;Bayon et al, 2013;Hu et al, 2014;Pierre et al, 2014;Wang et al, 2014Wang et al, , 2015Novikova et al, 2015;Crémière et al, 2016 ;Franchi et al, 2017 ;Yang et al, 2018;Wang et al, 2019). Note that all these literature data for modern seep carbonates are also compiled in Table S3.…”

Section: Revisiting Ree Systematics In Modern Cold Seep Carbonatesmentioning

confidence: 99%

Microbial utilization of rare earth elements at cold seeps related to aerobic methane oxidation

et al. 2020

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A major breakthrough in the field of rare earth element (REE) geochemistry has been the recent discovery of their utility to microbial life, as essential metalloenzymes catalyzing the oxidation of methanol to formaldehyde. Lanthanide-dependent bacteria are thought to be ubiquitous in marine and terrestrial environments, but direct field evidence of preferential microbial utilization of REE in natural systems is still lacking. In this study, we report on the REE and trace element composition of the tube of a siboglinid worm collected at a methane seep in the Gulf of Guinea; a tube-dwelling annelid that thrives in deep-sea chemosynthetic ecosystems. High-resolution trace element profiles along the chitin tube indicate marked enrichments of lanthanum (La) and cerium (Ce) in its oxic part, resulting in REE distribution patterns that depart significantly from the ambient seawater signature. Combined with various geochemical and microbiological evidence, this observation provides direct support for an active consumption of light-REE at cold seeps, associated with the aerobic microbial oxidation of methane. To further evaluate this hypothesis, we also reexamine the available set of REE data for modern seep carbonates worldwide. While most carbonate concretions at cold seeps generally display REE distribution patterns very similar to those for reduced pore waters in marine sediments, we find that seafloor carbonate pavements composed of aragonite commonly exhibit pronounced light-REE enrichments, as inferred from high shalenormalized La/Gd ratio (>~0.8), interpreted here as possibly reflecting the signature of lanthanidedependent methanotrophic activity. This finding opens new perspectives for revisiting REE systematics in ancient seep carbonates and other microbialites throughout the Earth's history. In particular, the geochemical imprint of aerobic methane oxidation could be possibly traced using REE in Archaean stromatolites and other archives of Precambrian seawater chemistry, potentially providing new insights into the oxygenation of early Earth's oceans and associated microbiogeochemical processes. 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.

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Section: Revisiting Ree Systematics In Modern Cold Seep Carbonatesmentioning

confidence: 99%

Microbial utilization of rare earth elements at cold seeps related to aerobic methane oxidation

et al. 2020

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“…In authigenic carbonates, rare earth elements (REE) are commonly used to reconstruct interstitial redox conditions and to trace the evolution of early diagenetic fluids (e.g. Birgel et al, A C C E P T E D M A N U S C R I P T 2011; Himmler et al, 2010;Hu et al, 2014;McRae et al, 1992, Wang et al, 2015Zwicker et al, 2018). Carbonates forming under normal marine conditions in oxygenated waters follow the smooth seawater REE profile, characterized by enrichments in HREE along with positive La and negative Ce anomalies (Elderfield et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…Conversely, positive Ce anomalies represent precipitation in anoxic to suboxic porewaters. Methane-derived carbonates are characterized by a wide range of Ce concentrations, with positive anomalies indicative of precipitation under strictly anoxic conditions and negative or absent anomalies ascribed to episodic oxic conditions and seawater influences (Feng et al, 2010;Hu et al, 2014;Wang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

A deep fluid source of radiogenic Sr and highly dynamic seepage conditions recorded in Miocene seep carbonates of the northern Apennines (Italy)

et al. 2019

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“…The bottom seawater samples from station C and the vent water samples from HM-ROV-2 showed a slight positive Eu anomaly (Figure 4), which is likely associated with AOM [61,62]. Recent research has suggested that in a reducing environment, reductive dissolution or desorption of Fe and Mn oxides enables Eu to be released more easily than other REEs; thus, Eu is given priority for entering the liquid and presents a positive Eu anomaly [63].…”

Section: Geofluidsmentioning

confidence: 99%

Hydrochemical Characteristics and Evolution Mode of Cold Seeps in the Qiongdongnan Basin, South China Sea

et al. 2020

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Submarine cold seeps have recently attracted significant attention and are among the most effective indicators of gas hydrate in the oceans. In this study, remotely operated vehicle (ROV) observations, seismic profiles, core sediments, bottom seawater, and fluid vented from cold seeps in the deep-water Qiongdongnan Basin were used to investigate the origin and evolution of cold seeps and their relationships with gas hydrate. At stations A, B, and C, inactive cold seeps with dead clams, cold seep leakage with live clams, and active cold seeps with a rich mussel presence, respectively, were observed. The salinity and Na+ and Cl- concentrations of the cold seeps were different from those of typical seawater owing to gas hydrate formation and decomposition and fluid originating from various depths. The main ion concentrations of the bottom seawater at stations B and C were higher than those at station A, indicating the substantial effects of low-salinity cold seep fluids from gas hydrate decomposition. The Na+-Cl-, K+-Cl-, Mg2+-Cl-, and Ca2+-Cl- diagrams and rare earth element distribution curves of the water samples were strongly affected by seawater. The concentrations of trace elements and their ratios to Cl- in the bottom seawater were high at the stations with cold seeps, suggesting the mixing of other fluids rich in those elements. Biochemical reactions may also have caused the chemical anomalies. Samples of HM-ROV-1 indicated a greater effect of upward cold seep fluids with higher B/Cl-, Sr/Cl-, and Ba/Cl- values. Moreover, the Re/Cl- value varied between fluid vents, possibly due to differences in Re precipitation strength. Differences in cold seep intensity are also believed to occur between areas. The cold seep fluxes changed from large to small before finally disappearing, showing a close connection with gas hydrate formation and decomposition, and influenced the local topography and ecosystems.

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Tracing the composition, fluid source and formation conditions of the methane-derived authigenic carbonates in the Gulf of Cadiz with rare earth elements and stable isotopes

Cited by 23 publications

References 81 publications

Microbial utilization of rare earth elements at cold seeps related to aerobic methane oxidation

Microbial utilization of rare earth elements at cold seeps related to aerobic methane oxidation

A deep fluid source of radiogenic Sr and highly dynamic seepage conditions recorded in Miocene seep carbonates of the northern Apennines (Italy)

Hydrochemical Characteristics and Evolution Mode of Cold Seeps in the Qiongdongnan Basin, South China Sea

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