Sulfur cycling in carbonatite of the Kaiserstuhl volcanic complex (Germany)

2020 ◽  
Author(s):  
Bianca Kuhn ◽  
Christian Peters ◽  
Simon Schurr
Keyword(s):  
Isotopic Composition ◽  
Oxidation State ◽  
Sulfur Isotope ◽  
Water Soluble ◽  
Sulfur Cycling ◽  
Upper Rhine Graben ◽  
Volcanic Complex ◽  
Sulfur Isotopic Composition ◽  
Isotope Data ◽  
Sulfur Isotope Data

<p>The redox sensitive element sulfur is used for reconstructing the oxygen fugacity during magmatic melt evolution applying the sulfur isotopic composition of sulfide and sulfate minerals. Especially fast ascending sulfur-rich alkaline magma from the upper mantle provides the possibility for determining the oxidation state of Earth`s mantle via a detailed investigation of the sulfur cycling. Here we present the first sulfur isotope data of sulfides, sulfates as well as carbonate associated sulfate (CAS) of carbonatite (sövite) from two well-studied locations (Orberg and Badberg) of the Kaiserstuhl volcanic complex, situated in the southern part of the Upper Rhine Graben (Germany). Based on our results, sövites are 25000 times more enriched in sulfate than in sulfide. Sulfides display a δ<sup>34</sup>S value of 0.6 ‰ (V-CDT), whereas water-soluble sulfate (e.g. anhydrite) show a sulfur isotopic composition between 3.8 ‰ and 6.1 ‰. δ<sup>34</sup>S<sub>CAS </sub>data are at 6 ‰ at the Orberg and 9 ‰ at Badberg locality. Our sulfur isotope data are comparable to other carbonatite occurrences worldwide (e.g. Phalabora, South Africa), emplaced at similar temperatures (ca. 860 °C). However, the strongly elevated sulfate content recorded here for sövites formed at this high temperature is unique and indicates an enhanced oxidation state during sövite formation in the Kaiserstuhl volcanic complex.</p>

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

2011 ◽  
Vol 280 (1-2) ◽  
pp. 217-231 ◽  
Author(s):  
Marc Peters ◽  
Harald Strauss ◽  
Sven Petersen ◽  
Nicolai-Alexeji Kummer ◽  
Christophe Thomazo
Keyword(s):  
Sulfur Isotope ◽  
Sulfur Cycling ◽  
Tyrrhenian Sea ◽  
Isotope Data ◽  
Sulfur Isotope Data

scholarly journals Geochemical description and sulfur isotope data for Shahrak intrusive body and related Fe‐mineralization (east Takab), northwest Iran

Island Arc ◽  
2020 ◽  
Vol 29 (1) ◽  
Author(s):  
Ali A. Sepahi ◽  
Hamid Ghoreishvandi ◽  
Mohammad Maanijou ◽  
Teruyuki Maruoka ◽  
Hamed Vahidpour
Keyword(s):  
Sulfur Isotope ◽  
Intrusive Body ◽  
Isotope Data ◽  
Northwest Iran ◽  
Sulfur Isotope Data

scholarly journals Multiple Sulfur Isotope Records of the 3.22 Ga Moodies Group, Barberton Greenstone Belt

Geosciences ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 145 ◽  
Author(s):  
Masafumi Saitoh ◽  
Sami Nabhan ◽  
Christophe Thomazo ◽  
Nicolas Olivier ◽  
Jean-François Moyen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Isotopic Composition ◽  
Greenstone Belt ◽  
Sulfur Isotope ◽  
Secondary Ion Mass Spectrometry ◽  
Sulfur Isotopes ◽  
Volcanic Rocks ◽  
Isotope Ratio Mass Spectrometry ◽  
Sulfur Isotopic Composition ◽  
Barberton Greenstone Belt

The Moodies Group, the uppermost unit in the Barberton Greenstone Belt (BGB) in South Africa, is a ~3.7-km-thick coarse clastic succession accumulated on terrestrial-to-shallow marine settings at around 3.22 Ga. The multiple sulfur isotopic composition of pyrite of Moodies intervals was newly obtained to examine the influence of these depositional settings on the sulfur isotope record. Conglomerate and sandstone rocks were collected from three synclines north of the Inyoka Fault of the central BGB, namely, the Eureka, Dycedale, and Saddleback synclines. The sulfur isotopic composition of pyrite was analyzed by Secondary Ion Mass Spectrometry (SIMS) for 6 samples from the three synclines and by Isotope Ratio Mass Spectrometry (IR-MS) for 17 samples from a stratigraphic section in the Saddleback Syncline. The present results show a signal of mass-independent fractionation of sulfur isotopes (S-MIF), although t-tests statistically demonstrated that the Moodies S-MIF signals (mostly 0‰ < ∆33S < +0.5‰) are significantly small compared to the signal of the older Paleoarchean (3.6–3.2 Ga) records. These peculiar signatures might be related to initial deposition of detrital pyrite of juvenile origin from the surrounding intrusive (tonalite–trondhjemite–granodiorite; TTG) and felsic volcanic rocks, and/or to secondary addition of hydrothermal sulfur during late metasomatism. Moreover, fast accumulation (~0.1–1 mm/year) of the Moodies sediments might have led to a reduced accumulation of sulfur derived from an atmospheric source during their deposition. As a result, the sulfur isotopic composition of the sediments may have become susceptible to the secondary addition of metasomatic sulfur on a mass balance point of view. The sulfur isotopic composition of Moodies pyrite is similar to the composition of sulfides from nearby gold mines. It suggests that, after the Moodies deposition, metasomatic pyrite formation commonly occurred north of the Inyoka Fault in the central BGB at 3.1–3.0 Ga.

New mineralogical, fluid inclusion and sulfur isotope data of ores from the Obří důl skarn-type deposit (Bohemian Massif)

2016 ◽  
Author(s):  
Jan Pašava ◽  
František Veselovský ◽  
Petr Dobeš ◽  
Eva Haluzová ◽  
Lukáš Ackerman ◽  
...  
Keyword(s):  
Fluid Inclusion ◽  
Bohemian Massif ◽  
Sulfur Isotope ◽  
Isotope Data ◽  
Sulfur Isotope Data

Microbial sulfur cycling during the formation of Primary Lower Gypsum in Mediterranean marginals basins

2021 ◽  
Author(s):  
Laetitia Guibourdenche ◽  
Pierre Cartigny ◽  
Francesco Dela Pierre ◽  
Marcello Natalicchio ◽  
Giovanni Aloisi
Keyword(s):  
Isotopic Composition ◽  
Sulfur Cycling ◽  
Messinian Salinity Crisis ◽  
Sulfate Ion ◽  
Reduced Sulfur Compounds ◽  
Sulfur Isotopic Composition ◽  
Microbial Sulfate Reduction ◽  
Gypsum Formation ◽  
Wide Range

&lt;p&gt;During the first phase of the Messinian Salinity Crisis, massive amounts of sulfate (SO&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;2-&lt;/sup&gt;) have been sequestred in the form of up to 200m thick gypsum deposits (Primary Lower Gypsum) in Mediterranean marginal basins. The sulfur isotopic composition of the sulfate ion of this unit (&amp;#948;&lt;sup&gt;34&lt;/sup&gt;S&lt;sub&gt;SO4&lt;/sub&gt;) (on average 22.3 &amp;#8240;) strongly suggests that gypsum was formed by concentration of marine sulfate. Interestingly, the preservation of sulfide globules within the gypsum and marls interbeds suggests that the basin sulfate was not only involved in gypsum formation but a fraction was also reduced through microbial sulfate reduction. Moreover, filamentous fossils interpreted to be the remnants of sulfide oxidizing bacterias are entrapped in this gypsum and indicate, together with the occurrence of sulfide globules and dolomite, that an active biogeochemical sulfur cycling was active at the time of Primary Lower Gypsum deposition. To investigate the role of this active sulfur cycling in Mediterranean marginal basins, we analyzed the multiple sulfur isotopic composition of sulfate and sulfide minerals (&amp;#948;&lt;sup&gt;34&lt;/sup&gt;S and&amp;#916;&lt;sup&gt;33&lt;/sup&gt;S)&lt;sub&gt;&lt;/sub&gt;from Primary Lower Gypsum of the Vena del Gesso basin (Italy). Whereas the isotopic composition of gypsum (&amp;#948;&lt;sup&gt;34&lt;/sup&gt;S&lt;sub&gt;SO4 &lt;/sub&gt;from 21 to 24&amp;#8240; and &amp;#916;&lt;sup&gt;33&lt;/sup&gt;S&lt;sub&gt;SO4 &lt;/sub&gt;from -0.001 to 0.049&amp;#8240;) display very homogenous values that are close to those of the Messinian ocean (&amp;#948;&lt;sup&gt;34&lt;/sup&gt;S&lt;sub&gt;MSC &lt;/sub&gt;~22&amp;#177;0.2&amp;#8240; and &amp;#916;&lt;sup&gt;33&lt;/sup&gt;S&lt;sub&gt;MSC&lt;/sub&gt;~0.039&amp;#177;0.015), the analyzed reduced sulfur compounds display a wide range of variability&amp;#160; with -36 to +9&amp;#8240; in &amp;#948;&lt;sup&gt;34&lt;/sup&gt;S and -0.017 to 0.125&amp;#8240; in &amp;#916;&lt;sup&gt;33&lt;/sup&gt;S. This suggests huge hydrologically-driven redox variations during Primary Lower Gypsum deposition in the Vena del Gesso basin, possibly involving intermittent stratification of the water column and an active microbial cycling of sulfur.&lt;/p&gt;

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