Origin of sulfur

Same origin of sulfur for base-metal vein-type deposits and Kuroko deposits. 

The sulfur isotopic data are consistent with geologic environments of Hg and Sb deposits Sedimentary rocks are dominant and marine rocks are not present in Sb-Hg mineralization districts. However, a few samples of stibnite and cinnabar from the deposits in Green tuff region display high S S values. In contrast of this interpretation on the origin of sulfur, Ishihara and Sasaki (1994) thought that sulfur came from ilmenite-series granific rocks. However, these rocks are not found in the north Hokkaido. 

Elucidation of the origin of sulfur in volcanic systems is complicated by the fact that next to SO2, significant amounts of H2S, sulfate and elemental sulfur can also be present. The bulk sulfur isotope composition must be calculated using mass balance constraints. The principal sulfur gas in equilibrium with basaltic melts at low pressure and high temperature is SO2. With decreasing temperature and/or increasing... 

Cavarretta G, Lombardi G (1990) Origin of sulfur in the Quaternary perpotassic melts of Italy evidence from haiiyne sulfur isotope data. Chem Geol 82 15-20 Cavazza W, Wezel FC (2003) The Mediterranean region. A geological primer. Episodes 26 160-168... 

Origin of Sulfur in Fossil Fuels and Related Materials... 

This chapter reviews research on the abundance of sulfur in major coal basins in the U.S., the forms of sulfur in coals, the distribution of sulfur in coal lithotypes and macerals, and the nature of sulfur-containing organic compounds in coal. Next, the origin of sulfur in coal is reviewed based on the evidence from the distribution and speciation of sulfur in peat, and from stratigraphic, isotopic, and trace element data. Finally, the origin of sulfur in coal is explained by a geochemical model. 

Sulfur isotopic measurements can shed light on the origin of sulfur in coal. The 34S/32S ratio depends on the source of sulfur and the geologic processes involved during coal formation. For example, isotopic compositions are different for the two principal sources of sulfur in coal 1) the sulfur preserved from the precursor plant material, and 2) the sulfur derived from the bacterial reduction of dissolved sulfate in ambient waters. Plant assimilation of sulfur results in a slight depletion of 34S (4-4.5%c) relative to the 834S in the dissolved sulfate source (102.103). In contrast, the dissimilatory bacterial reduction of sulfate results in a large isotopic fractionation sulfide sulfur can be depleted as much as 60%o in the heavy isotope (89.104-106). 

Use of Trace Elements in Studying the Origin of Sulfur in Coal, The... 

Geochemical studies of sulfur in coal provide information on the forms, distribution, and origin of sulfur in coal. The variation of sulfur content in coal is controlled by geologic conditions during coal formation. This is... 

In order to determine the origin of sulfur in coals, Hackley and Anderson (18) studied the sulfur isotopic composition of various coals from the western United States. Coals from the Powder River Basin, Wyoming were found to have anomalously low values (-18.7 to 3.9 parts per mil). The unusual values of these coals suggest that original plant material and isotopically light secondary sulfur from bacterial activity were the major contributors to the sulfur content of these coals. 

The origin of sulfur compounds in wine. In plants the basic source of sulfur is sulfate. After biochemical reduction numerous sulfur containing molecules are formed. The most abundant S-compounds, however, are represented by two amino... 

Mosser, J.L., Mosser, A.G. and Brock, T.D., 1973. Bacterial origin of sulfuric acid in geothermal habitats. Science, 179 1323—1324. 

Schoen, R. and Ehrlich, G.G., 1968. Bacterial origin of sulfuric acid in sulfurous hot springs. Twenty-third International Geological Congress, Vol. 17. Prague, pp. 171— 178. 

Casagrande, D. J., Gronli, K., and Sutton, N. (1980). The distribution of sulfur and organic matter in various fractions of peat Origins of sulfur in coal. Geochim. Cosmochim. Acta 44, 24-32. 

Delmas, R., and J. Servant (1982). The origins of sulfur compounds in the atmosphere of a zone of high productivity (Gulf of Guinea). J. Geophys. Res. 87, 11019-11026. 

Casagrande, D.J., Siefert, K., Berschinski, C. and Sutton, N., 1977. Sulfur in peat-forming systems of the Okefenokee Swamp and Florida Everglades origins of sulfur in coal. Geochim. Cosrhochim. Acta, 41 161—167. 

Gransch, J.A. and Postuma, J., 1973. On the origin of sulfur in crudes. Advances in organic geochemistry, Actes du 6 Congres international de Geochimie organique, 18— 21 Septembre 1973, Rueil—Malmaison, France, pp. 727—738. 

Volatile sulfur compounds are found in most cheeses and can be important flavor constituents. The origin of sulfur-containing compounds is generally thought to be the sulfur-containing amino acids methionine and cysteine (Law, 1987). As Cys is rare in the caseins (occurring at low levels only in Os2- and K-caseins, which are not extensively hydrolyzed in cheese), the origin of sulfur compounds must be primarily Met. Sulfur compounds formed from Met include H2S, dimethylsulfide, and methanethiol. The importance of methanethiol and related compounds in cheese aroma is discussed by Law (1987). 

The origin of sulfur in most coals is believed to be sulfate ion, derived fi om seawater. During the earliest stages of coal formation, bacterial decomposition of the coalforming plant deposits occurs. Some of these bacteria reduce sulfate to sulfide. This immediately reacts with iron to form pyrite, the principal inorganic form of sulfur in coals. It is also incorporated into the organic portion of the coal. The amount and form of sulfur in coals depend much more on the coal s depositional environment than on its age or rank. In this sense, it is largely a coal-type parameter, not a rank parameter. 

S.4.2.4 Tracking Origin of Sulfur Atom in Saccharin Synthesis... 

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