Pyrite burial

Tg year x. Lein and Ivanov [71] have estimated the total sulfide burial in the Black Sea of 2.4 Tgyear 1 including about 1 Tgyear-1 that is buried in the anoxic zone. Using these data and integrated over the upper 20 cm of sediment sulfate reduction rates, Neretin and co-authors [75] concluded that the annual sulfide flux into the water column from sediments of the anoxic zone is between 3 and 5 Tgyear x. The value is likely to be overestimated due to spatial differences in pyrite burial rates and possible sulfide diffusion downward into the deeper sediment layers. 

Ion Ocean Inventory (10 mol) River Input Atmospheric- Evaporite Cycling S Ion Exchange Hydrothermal Activity Pyrite Burial or Other Carbonate Deposition ... 

From initial deposition and burial under overlying sedimentary materials through succeeding geological periods, coal beds are continually subject to the action of ground water. Thus, some coal beds have developed a system of essentially vertical fractures—thin cracks, often filled with coatings of pyrite. calcile. kaolinite and other minerals deposited from ground water. Impurities from these veins lower the quality of the coal. 

Berner, R. A. (1982). Burial of organic carbon and pyrite sulfur in the modern ocean Its geochemical and environmental significance. Am. J. Sci. 282,451—473. 

It has been shown by mineralogical, chemical and X-ray-diffraction analyses that the major part of reduced sulfur occurs in the form of pyrite in ancient sediments (Lein, 1978)81). It has been also established that pyrite may form rapidly in muds of recent sediments. In anoxic bottom waters, pyrite formation can take place before and after burial even during sedimentation (Berner, 1984)89). Also the geological occurrence and chemical stability relations indicate that authigenic pyrites can be synsedimentary or diagenetic (Kalliokosky, 1966)90). 

Huber C, Wachtershauser G (2006) a-hydroxy and a-amino acids under possible Hadean, volcanic origin-of-life conditions. Science 314 630-632 Huber H, Stetter KO (1998) Hyperthermophiles and their possible potential in biotechnology. J Biotechnol 64 39-52 Hurtgen MT, Arthur MA, Halverson GP (2005) Neoproterozoic sulfur isotopes, the evolution of microbial sulfur species, and the burial efficiency of sulfide as sedimentary pyrite. Geology 33 41-44 Husain V, Winkler O (2007) Semiclassical states for quantum cosmology. Phys Rev D 75 024014... 

The first step in the formation of coal is the alteration of plant material into peat by biochemical (i.e., microbial) processes. The overall properties and composition of a given peat depend upon the environmental conditions that existed during the alteration period after burial. During the biochemical stage, microorganisms can reduce the sulfate in saline pore water to an active form of sulfur, e.g., H2S. H2S will react with components of the sediment, forming pyrite when iron is present and forming... 

Berner R.A. and Raiswell R. (1983) Burial of organic carbon and pyrite sulfur in sediments over Phanerozoic time A new theory. Geochim. Cosmochim. Acta 47, 855-862. 

The basis of interpretation of the sulfur isotope record is essentially identical to that for carbon pyrite sulfur simply substitutes for organic carbon in the burial term of Equation (1). However, the long residence time of sulfur (sulfate) in the ocean (—50 Myr Holser et al, 1988) means that the time rate of change term on the left-hand side of Equation (1) is important, and cannot be neglected, and steady state cannot be assumed (i.e.. Equation (2) cannot be used for the sulfiu- cycle). 

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