The sulphur isotopic composition of ocean water sulphate

Rees, C. E.; Jenkins, W. J.; Monster, Jan

doi:10.1016/0016-7037(78)90268-5

Cited by 599 publications

(335 citation statements)

References 19 publications

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“…Seawater data is from Rees et al (1978). FMCA is average value of the Pb isotope ratios in Fe-Mn crust.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the δ 34 S values of sulfide minerals at the LHF are higher than basalt-hosted hydrothermal fields (e.g., EPR near 13°N, 11°N, and 1-2°S; Table 2), and are likely to have been influenced by reduction of seawater sulfate under higher fluid fluxes, more oxidizing conditions, and sulfide leaching from serpentinized peridotite and mafic material during high-temperature hydrothermal alteration (Alt et al, 2007;Delacour et al, 2008). In addition, the sulfur isotopic composition (δ 34 S = 21.5‰) of the single sulfate sample at the EHF, which is indistinguishable from that of the seawater sulfate δ 34 S value (+21‰; Rees et al, 1978), indicates that the sulfur in sulfate is derived from seawater, which can be interpreted as evidence of entrainment of seawater into hydrothermal fluids within the chimney.…”

Section: Sulfur Sourcesmentioning

confidence: 97%

“…Furthermore, basaltic sulfur can be efficiently leached by high-temperature (300 °C-500 °C) fluid (Mottl et al, 1979), and large sulfur isotopic fractionation does not occur during leaching, transport, or reprecipitation as sulfide minerals (Shanks and Niemitz, 1982). Seawater sulfate has a δ 34 S value of +21‰ (Rees et al, 1978). Hydrothermal vent fluids for seafloor sulfide-sulfate mineralization typically have δ 34 S values of H 2 S that range from 1.5‰ to 7‰ (e.g., Shanks et al, 1995), which fall between the δ 34 S values for basalts (+0.1 ± 0.5‰) and seawater (+21‰).…”

Section: Sulfur Sourcesmentioning

confidence: 99%

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Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation

Zeng

Chen

et al. 2017

Ore Geology Reviews

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“…Seawater data is from Rees et al (1978). FMCA is average value of the Pb isotope ratios in Fe-Mn crust.…”

Section: Resultsmentioning

confidence: 99%

Section: Sulfur Sourcesmentioning

confidence: 97%

Section: Sulfur Sourcesmentioning

confidence: 99%

See 1 more Smart Citation

Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation

Zeng

Chen

et al. 2017

Ore Geology Reviews

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“…It is possible that higher δ 34 S values obtained from the Snail and Yamanaka sulfides are attributed to the incorporation of seawater sulfate-derived sulfur without isotopic fractionation during reducing process in a seafloor environment. Sulfur occurs as sulfate in seawater with δ 34 S values of about +21 ‰ (Rees et al 1978). So the incorporation of seawater sulfate-derived sulfur reduced without isotope fractionation can increase the δ 34 S values.…”

Section: Source Of a Range In Sulfur Isotopic Compositions For Sulfidmentioning

confidence: 99%

Mineralogical and Geochemical Characteristics of Hydrothermal Minerals Collected from Hydrothermal Vent Fields in the Southern Mariana Spreading Center

Ikehata

Suzuki

Shimada

et al. 2014

Subseafloor Biosphere Linked to Hydrothermal Systems

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Seafloor hydrothermal mineralization of four active hydrothermal fields (Snail, Yamanaka, Archaean and Pika sites) in the Southern Mariana Trough was investigated to clarify the mineralogical and geochemical characteristics of the hydrothermal minerals. The Snail site and the Yamanaka site are located on the crest of the backarc spreading ridge (on-axis). The Pika site sits atop an off-axial volcano, 4.9 km distant from the spreading axis, while the Archaean site sits on the flank of the spreading ridge, about 1.5 km distant from the axis. In the four hydrothermal sites, chimney and mound sulfides are composed mainly of pyrite, marcasite, sphalerite and chalcopyrite. Conduits and interstices of these sulfide minerals are filled with late barite and anhydrite. Mineralizations of off-axial hydrothermal fields have mineralogical and geochemical signatures (Fe-rich and low f S2 condition) similar to those of mineralizations at sediment-free mid-ocean ridge settings. By contrast, mineralizations of on-axial sites show distinctly Zn and Pb-rich (high f S2 condition) signatures similar to those found in arc or rifting settings. Sulfur isotopic compositions of collected sulfide minerals show a similar diversity with a mid-ocean ridge range for the off-axial sites and an island-arc range for the on-axial sites. These isotopic signatures could be explained by varying proportions of magmatic sulfur leached from the underlying volcanic rocks and reduced seawater sulfates. Keywords

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“…Three likely contributors to sulfate in bulk deposition are also plotted to define a mixing domain. These are +0.85‰ for volcanic emissions (Sakai et al, 1982), +21.1‰ for sea-salt (Rees et al, 1978) and +15.6‰ for marine biogenic emissions (Calhoun et al, 1991). A two-step series of calculations explored the relative contribution of these sources to sulfate in bulk deposition.…”

Section: Sulfur Sources In Bulk Depositionmentioning

confidence: 99%

Steep spatial gradients of volcanic and marine sulfur in Hawaiian rainfall and ecosystems

Bern

Chadwick

Kendall

et al. 2015

Science of The Total Environment

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• Sources of sulfur in Hawaiian ecosystems were investigated via sulfur isotopes.• Basalt, sea-salt, volcanic and marine biogenic emissions have distinct isotope ratios.• Atmospheric deposition sources of sulfur dominated all but one site investigated.• Steep gradients of marine vs. volcanic atmospheric deposition were found.• Gradients occurred with distance to the coast and elevation. a b s t r a c t a r t i c l e i n f o Sulfur, a nutrient required by terrestrial ecosystems, is likely to be regulated by atmospheric processes in welldrained, upland settings because of its low concentration in most bedrock and generally poor retention by inorganic reactions within soils. Environmental controls on sulfur sources in unpolluted ecosystems have seldom been investigated in detail, even though the possibility of sulfur limiting primary production is much greater where atmospheric deposition of anthropogenic sulfur is low. Here we measure sulfur isotopic compositions of soils, vegetation and bulk atmospheric deposition from the Hawaiian Islands for the purpose of tracing sources of ecosystem sulfur. Hawaiian lava has a mantle-derived sulfur isotopic composition (δ 34 S VCDT) of − 0.8‰. Bulk deposition on the island of Maui had a δ 34 S VCDT that varied temporally, spanned a range from +8.2 to + 19.7‰, and reflected isotopic mixing from three sources: sea-salt (+ 21.1‰), marine biogenic emissions (+ 15.6‰), and volcanic emissions from active vents on Kilauea Volcano (+ 0.8‰). A straightforward, weathering-driven transition in ecosystem sulfur sources could be interpreted in the shift from relatively low (0.0 to +2.7‰) to relatively high (+17.8 to +19.3‰) soil δ 34 S values along a 0.3 to 4100 ka soil age-gradient, and similar patterns in associated vegetation. However, sub-kilometer scale spatial variation in soil sulfur isotopic composition was found along soil transects assumed by age and mass balance to be dominated by atmospheric sulfur inputs. Soil sulfur isotopic compositions ranged from +8.1 to +20.3‰ and generally decreased with increasing elevation (0-2000 m), distance from the coast (0-12 km), and annual rainfall (180-5000 mm). Such trends reflect the spatial variation in marine versus volcanic inputs from atmospheric deposition. Broadly, these results illustrate how the sources and magnitude of atmospheric deposition can exert controls over ecosystem sulfur biogeochemistry across relatively small spatial scales.Published by Elsevier B.V.

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The sulphur isotopic composition of ocean water sulphate

Cited by 599 publications

References 19 publications

Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation

Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation

Mineralogical and Geochemical Characteristics of Hydrothermal Minerals Collected from Hydrothermal Vent Fields in the Southern Mariana Spreading Center

Steep spatial gradients of volcanic and marine sulfur in Hawaiian rainfall and ecosystems

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