Hydrothermalism in the Tyrrhenian Sea: Inorganic and microbial sulfur cycling as revealed by geochemical and multiple sulfur isotope data

Peters, Marc; Strauß, Harald; Petersen, Sven; Kummer, Nicolai-Alexeji; Thomazo, Christophe

doi:10.1016/j.chemgeo.2010.11.011

Cited by 50 publications

(31 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The combined positive ı 34 S values and only minor negative displacement in 33 S from zero per mil would be consistent with unfractionated juvenile magmatic sulfur as the primary sulfur source but a contribution from recycled ambient seawater sulfate cannot be ruled out. Notably, the range in ı 34 S is quite comparable to the relationship between modern hydrothermal sulfides and their magmatic host rocks (e.g., Peters et al, 2010Peters et al, , 2011 Such data reflect the transfer of a mass-independently fractionated (i.e. an atmospheric) sulfur isotope signal, notably photolytic sulfate, to igneous rocks and also to the mantle.…”

Section: Massive and Disseminated Sulfide Oresmentioning

confidence: 73%

Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa

Montinaro

Strauß

Mason

et al. 2015

Precambrian Research

Self Cite

View full text Add to dashboard Cite

a b s t r a c tMass-dependent and mass-independent sulfur isotope fractionation archived in volcanic and sedimentary rocks from the Barberton Greenstone Belt (3550-3215 Ma), South Africa, provide constraints for sulfur cycling on the early Earth. Four different sample suites were studied: komatiites and tholeiites, barite, massive and disseminated sulfide ores, and non-mineralized black shales.Variable but generally slightly positive ı 34 S values between −0.7 and +5.2‰, negative 33 S values between −0.50 and −0.09‰, and a negative correlation between ı 34 S and 33 S as well as between 33 S and 36 S for komatiites and tholeiites from the Komati Formation and from the Weltevreden Formation are outside the expected range of unfractionated juvenile sulfur. Instead, results suggest alteration of oceanic crustal rock sulfur through interactions with fluids that most likely derived their sulfur from seawater.Barite from the Mapepe Formation displays positive ı 34 S values between +3.1 and +8.1‰ and negative 33 S values between −0.77 and −0.34‰. The mass-independent sulfur isotope fractionation indicates an atmospheric sulfur source, notably photolytic sulfate, whereas the positive ı 34 S values suggest bacterial sulfate reduction of the marine sulfate reservoir.Non-mineralized black shale samples from the presumed stratigraphic equivalent of the Mapepe Formation show positive ı 34 S values between 0.0 and +1.3‰ and positive 33 S values between +0.59 and +2.45‰. These results are interpreted to result from the reduction of photolytic elemental sulfur, carrying a positive 33 S signature.Positive ı 34 S values ranging from +0.7 to +3.5‰ and slightly negative 33 S values between −0.17 and −0.12‰ characterize massive and disseminated sulfides from the Bien Venue Prospect. Results suggest unfractionated juvenile magmatic sulfur source as the primary sulfur source, but a contribution from recycled seawater sulfate, which would be indicative of submarine hydrothermal activity, cannot be ruled out.Massive and disseminated sulfides from the M'hlati prospect are distinctly different from massive and disseminated sulfide from the Bien Venue Prospect. They show negative ı 34 S values between −1.2 and −0.1‰ and positive 33 S values between +2.66 and +3.17‰, thus, displaying a sizeable mass-independent A. Montinaro et al. / Precambrian Research 267 (2015) 311-322 sulfur isotopic fractionation. Again, these samples clearly exhibit the incorporation of an atmospheric MIF-S signal. The source of sulfur for these samples has positive 33 S values, suggesting a connection with photolytic elemental sulfur. In conclusion, the sulfur isotope signatures in Paleoarchean rocks from the Barberton Greenstone Belt are diverse and indicate the incorporation of different sources of sulfur. For komatiites and tholeiites, barite and massive and possibly also disseminated sulfides from Bien Venue, multiple sulfur isotopes are related to ambient seawater sulfate and its photolytic origin, while massive and disseminated sulfides from M'hlati and non-...

show abstract

Section: Massive and Disseminated Sulfide Oresmentioning

confidence: 73%

Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa

Montinaro

Strauß

Mason

et al. 2015

Precambrian Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…For example, sedimentary sulfur isotope data indicate the presence and activity of different sulfur utilizing bacteria (Peters et al, 2011).…”

Section: Comparison Of Available Energy To Microbial Diversity and Otmentioning

confidence: 99%

Subsurface hydrothermal processes and the bioenergetics of chemolithoautotrophy at the shallow-sea vents off Panarea Island (Italy)

et al. 2015

View full text Add to dashboard Cite

Please cite this article as: Price, Roy E., LaRowe, Douglas E., Italiano, Francesco, Savov, Ivan, Pichler, Thomas, Amend, Jan P., Subsurface hydrothermal processes and the bioenergetics of chemolithoautotrophy at the shallow-sea vents off Panarea Island (Italy), Chemical Geology (2015Geology ( ), doi: 10.1016Geology ( /j.chemgeo.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E DM A N U S C R I P T ACCEPTED MANUSCRIPTThe subsurface evolution of shallow-sea hydrothermal fluids is a function of many factors including fluid-mineral equilibria, phase separation, magmatic inputs, and mineral precipitation, all of which influence discharging fluid chemistry and consequently associated seafloor microbial communities. Shallow-sea vent systems, however, are understudied in this regard. In order to investigate subsurface processes in a shallow-sea hydrothermal vent, and determine how these physical and chemical parameters influence the metabolic potential of the microbial communities, three shallow-sea hydrothermal vents associated with Panarea Island (Italy) were characterized.Vent fluids, pore fluids and gases at the three sites were sampled and analyzed for major and minor elements, redox-sensitive compounds, free gas compositions, and strontium isotopes. The corresponding data were used to 1) describe the subsurface geochemical evolution of the fluids and 2) to evaluate the catabolic potential of 61 inorganic redox reactions for in situ microbial communities. Generally, the vent fluids can be hot (up to 135 °C), acidic (pH 1.9-5.7), and sulfidic (up to 2.5 mM H 2 S). Three distinct types of hydrothermal fluids were identified, each with higher temperatures and lower pH, Mg 2+ and SO 4 2-, relative to seawater. Type 1 was consistently more saline than Type 2, and both were more saline than seawater. Type 3 fluids were similar to or slightly depleted in most major ions relative to seawater. End-member calculations of conservative elements indicate that Type 1 and Type 2 fluids are derived from two different sources, most likely 1) a deeper, higher salinity reservoir and 2) a shallower, lower salinity reservoir, respectively, in a layered hydrothermal system. The deeper reservoir records some of the highest end-member Cl concentrations to date, and developed as a result of recirculation A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

show abstract

“…For example, several recent studies have documented positive Δ 33 S values for H 2 S generated by bacterial SO 4 reduction (FARQUHAR et al, 2007) and in a variety of hydrothermal environments thought to have been affected by biological processes, including ancient sedimentary sulfides , modern hydrothermal sediments (PETERS et al, 2010;PETERS et al, 2011), S 0 , and barite (KIM et al, 2011;PETERS et al, 2011), and secondary pyrite in altered oceanic crust (ONO et al, 2012;. The temperature-dependent equilibrium fractionation between two S-containing species can also range in 33 θ value, although to a smaller extent than in biological processes (JOHNSTON, 2011;ONO et al, 2006 .…”

Section: Unsedimented Mid-ocean Ridgementioning

confidence: 99%

“…The zones of potential biogenic sulfide influence on hydrothermal fluid H 2 S δ 34 S and Δ 33 S values in Figure 4 are based on biogenic pyrite measurements from the Logatchev deep-sea hydrothermal field on the Mid-Atlantic Ridge and the shallow Tyrrhenian Sea island arc off western Italy (Fig. 4a) (PETERS et al, 2010;PETERS et al, 2011). The meshed fields define the equilibrium multiple sulfur isotope compositions of H 2 S and SO 4 (Fig 4a) and S 0 and SO 4 during disproportionation of magmatic SO 2 at a range of temperatures (Fig.…”

Section: Back-arc Mid-ocean Ridgesmentioning

confidence: 99%

Geochemistry of deep-sea hydrothermal vent fluids from the Mid-Cayman Rise, Caribbean Sea

McDermott¹

2015

View full text Add to dashboard Cite

THESIS ABSTRACTThis thesis examines the controls on organic, inorganic, and volatile species distributions in hydrothermal fluids venting at Von Damm and Piccard, two recently discovered vent fields at the ultraslow spreading Mid-Cayman Rise, Earth's deepest mid-ocean ridge. A wide variety of possible temperatures and substrates for fluid/rock reaction exist at ultraslow spreading ridges. The flux of chemicals delivered to the ocean by circulating vent fluids exerts a major control on mass transfer into and out of the oceanic crust and supports chemosynthetic ecosystems. In Chapter 2, abiotic organic synthesis is shown to occur via two distinct mechanisms in the serpentinizing Von Damm system. Longstanding questions concerning the spatial, temporal, and mechanistic nature of carbon transformations in deep-sea hot springs are addressed. In contrast with the current paradigm, CH 4 is not actively forming during circulation of H 2 -rich vent fluids, but instead is derived from fluid inclusions in the host rocks. Chapters 3 and 4 present in-depth studies of the chemical and isotopic compositions of aqueous species in vent fluids at Von Damm and Piccard to elucidate the role of reaction temperature, pressure, substrate composition, and water/rock mass ratios during the chemical evolution of hydrothermal fluids at oceanic spreading centers. At Von Damm, sequential reaction of gabbroic and peridotite substrates at intermediate temperatures can explain generation of the observed fluids. Geochemical modeling shows that talc-quartz assemblage is expected to precipitate during fluid mixing with seawater at the seafloor. At Piccard, extremely high temperature subsurface water/rock reaction results in high temperature fluids that are richer in dissolved H 2 than any previously observed fluids worldwide. At both locations, high-H 2 conditions promote the abiotic reduction of ΣCO 2 to formate species, which may fuel a subsurface biosphere. In Chapter 5, multiple sulfur isotopes were measured on metal sulfide deposits, S 0 , and fluid H 2 S to constrain sulfur sources and the isotopic systematics of precipitation in a wide variety of seafloor hydrothermal vents. Areas studied include the eastern Manus Basin and Lau Basin back-arc spreading centers, the unsedimented basalt-hosted Southern East Pacific Rise, and the sediment-hosted Guaymas Basin mid-ocean ridge spreading centers. Limited isotope fractionation between fluid H 2 S and precipitating chalcopyrite implies that sulfur isotopes in a chimney lining may record past hydrothermal activity. ACKNOWLEDGEMENTSFirst, I would like to thank my co-advisor, Jeff Seewald, whose limitless scientific creavitity and sunny outlook have been a continual source of encouragement throughout the 5 years of my doctoral education and research. Jeff's gift for simultaneously challenging and motivating me has taught me many lasting lessons. His limitless optimism and imagination have left permanent impressions on my approach to scientific research, and will not be far from mind when I mentor oth...

show abstract

Hydrothermalism in the Tyrrhenian Sea: Inorganic and microbial sulfur cycling as revealed by geochemical and multiple sulfur isotope data

Cited by 50 publications

References 67 publications

Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa

Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa

Subsurface hydrothermal processes and the bioenergetics of chemolithoautotrophy at the shallow-sea vents off Panarea Island (Italy)

Geochemistry of deep-sea hydrothermal vent fluids from the Mid-Cayman Rise, Caribbean Sea

Contact Info

Product

Resources

About