Redox conditions and authigenic mineralization related to cold seeps in central Guaymas Basin, Gulf of California

Núñez‐Useche, Fernando; Canet, Carles; Liebetrau, Volker; Puig, Teresa; Ponciano, Alejandro Cristin; Alfonso, Pura; Berndt, Christian; Hensen, Christian; Mortera-Gutiérrez, C. A.; Rodríguez-Díaz, Augusto Antonio

doi:10.1016/j.marpetgeo.2018.04.010

Cited by 25 publications

(17 citation statements)

References 95 publications

(140 reference statements)

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“…1 mile further west outside Ringvent, and also not in any other core collected during the 2014 Expedition (details in Methods: Field surveys). XRD examination (Supplemental Data 2) shows that these carbonates consist of magnesian calcite, compositionally similar to cold seep carbonates reported previously for Guaymas Basin 22 . These localized carbonate concretions exhibit light δ 13 C values from −37 to −41‰, whereas smaller, visually inconspicuous carbonate grains and particles in sediment surrounding these nodules show slightly heavier δ 13 C values from −37 to −30‰ (Figs 4 and 5A, and Supplementary Data 3).…”

Section: Resultssupporting

confidence: 80%

“…Carbonate nodules and grains in core P11 are significantly lighter than organic carbon in the same core, between −20.5 and −22‰ (see Methods), and previously analyzed sedimentary organic carbon and chemosynthetic microbial biomass (−21.6 and −22.1‰, respectively) in Guaymas Basin 23 , indicative of contributions from methane-derived carbon sources. In their δ 13 C isotopic composition, the nodules resemble independently collected carbonates (−36.5‰) from surface mud of Ringvent 22 , and differ from cold seep carbonates in Guaymas Basin (−46.6 and −44.7‰ 4 ; −45.2 and −47.6‰ 21 ). In contrast, sedimentary carbonates in core P11 above and below the nodules have moderate 13 C depletion ranging from −15 to 0‰ (Figs 4 and 5A), and approach δ 13 C-DIC values of seawater (−0.6‰) in Guaymas Basin 23 .…”

Section: Resultsmentioning

confidence: 86%

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Characteristics and Evolution of sill-driven off-axis hydrothermalism in Guaymas Basin – the Ringvent site

Teske

McKay

Ravelo

et al. 2019

Sci Rep

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The Guaymas Basin spreading center, at 2000 m depth in the Gulf of California, is overlain by a thick sedimentary cover. Across the basin, localized temperature anomalies, with active methane venting and seep fauna exist in response to magma emplacement into sediments. These sites evolve over thousands of years as magma freezes into doleritic sills and the system cools. Although several cool sites resembling cold seeps have been characterized, the hydrothermally active stage of an off-axis site was lacking good examples. Here, we present a multidisciplinary characterization of Ringvent, an ~1 km wide circular mound where hydrothermal activity persists ~28 km northwest of the spreading center. Ringvent provides a new type of intermediate-stage hydrothermal system where off-axis hydrothermal activity has attenuated since its formation, but remains evident in thermal anomalies, hydrothermal biota coexisting with seep fauna, and porewater biogeochemical signatures indicative of hydrothermal circulation. Due to their broad potential distribution, small size and limited life span, such sites are hard to find and characterize, but they provide critical missing links to understand the complex evolution of hydrothermal systems.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 86%

Characteristics and Evolution of sill-driven off-axis hydrothermalism in Guaymas Basin – the Ringvent site

Teske

McKay

Ravelo

et al. 2019

Sci Rep

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“…The gravity coring results allowed a preliminary geochemical and microbial characterization of the proposed ridge flank drill sites. The 2015 Sonne cruise collected numerous sediment cores and seafloor grab samples from Guaymas Basin and the adjacent Sonora Margin (Núñez-Useche et al, 2018;Geilert et al, 2018). The major discovery of this cruise was an actively venting hydrothermal mound at the northern Guaymas graben, located on the edge of the eastern ridge flanks and supplied with hot and gas-rich hydrothermal fluids from the spreading center through axial-parallel fault lines (Berndt et al, 2016).…”

Section: Site Surveys and Seismic Studiesmentioning

confidence: 99%

Expedition 385 Scientific Prospectus: Guaymas Basin Tectonics and Biosphere: feedbacks between continental rifting, magmatism, sedimentation, thermal alteration of organic matter, and microbial activity

Teske¹,

Lizarralde²,

Höfig³

2018

International Ocean Discovery Program Scientific Prospectus

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Expedition 385 is based on International Ocean Discovery Program (IODP) drilling Proposals 833-Full2 and 833-Add (available at http://iodp.tamu.edu/scienceops/expeditions/guay-mas_basin_tectonics_biosphere.html). Following ranking by the IODP scientific advisory structure, the expedition was scheduled for the research vessel (R/V) JOIDES Resolution, operating under contract with the JOIDES Resolution Science Operator (JRSO). At the time of publication of this Scientific Prospectus, the expedition is scheduled to start in San Diego, California (USA), on 16 September 2019 and to end in San Diego on 16 November 2019. Accounting for 5 days of port call and 9 days of transit, a total of 47 days will be available for the drilling, coring, and downhole measurements described in this report (for the current detailed schedule, see http://iodp.tamu.edu/scienceops). Further details about the facilities aboard JOIDES Resolution can be found at http://www.iodp.tamu.edu/publicinfo/drillship.html.

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“…Several additional reactions such as organoclastic sulfate reduction (OSR) [7], authigenic precipitation of certain metallic elements [8], or formation and decomposition of gas hydrate [9] may also result in abnormal phenomena in the surrounding seawater, sediments, and ecosystems.…”

Section: Introductionmentioning

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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Redox conditions and authigenic mineralization related to cold seeps in central Guaymas Basin, Gulf of California

Cited by 25 publications

References 95 publications

Characteristics and Evolution of sill-driven off-axis hydrothermalism in Guaymas Basin – the Ringvent site

Characteristics and Evolution of sill-driven off-axis hydrothermalism in Guaymas Basin – the Ringvent site

Expedition 385 Scientific Prospectus: Guaymas Basin Tectonics and Biosphere: feedbacks between continental rifting, magmatism, sedimentation, thermal alteration of organic matter, and microbial activity

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

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