Geochemical evolution

Taylor S.R., McLennan S.M. The geochemical evolution of continental crust. Rev Geophy 1995 33 241-265. 

Dubrovsky N.M., Cherry J.A., Reardon E.J., Vivyurka, A.J. 1985. Geochemical evolution of inactive pyritic tailings in the Elliot Lake uranium district. Canadian Geotechnical Journal, 22, 110-128. 

O Hara, M. J. (1977). Geochemical evolution during fractional crystallization of a periodically refilled magma chamber. Nature, 266, 503-7. 

O Hara, M. J. Mathews, R. E. (1981). Geochemical evolution in an advancing, periodically replenished, periodically tapped, continuously fractionated magma chamber. J. Geol. Soc. London, 138, 237-77. 

Gedulin, B. Arrhenius, G. Sources and Geochemical Evolution of RNA Precursor Molecules The role of phosphate in Early Life on Earth Bengtson, S., Ed. Columbia University Press New York, NY, 1994, pp 91-106. 

Taylor SR, Mclennan SM (1995) The geochemical evolution of the continental crust. Rev Geophys 33 241-265... 

THE ROLE OF MARINE CARBONATES IN THE CRUSTAL-OCEAN-ATMOSPHERE FACTORY S GEOCHEMICAL EVOLUTION. STABILIZATION. 

Masterman, G.J. 2003. Structural and geochemical evolution of the Rosario Cu-Mo porphyry deposit and related Cu-Ag veins, Coiiahuasi district, northern Chile. PhD thesis. University of Tasmania, Tasmania, Australia. 

Geological and geochemical evolution of the San Miguel skarn, Tandilia Belt, Buenos Aires Province, Argentina... 

Accessory minerals and the geochemical evolution of crustal magmatic... 

The combustion process activates mineral ash with the result that leachates extract relatively high proportions of elements whose concentrations in potable water are limited. We are as yet some way from understanding the speciations of these elements in combustion waste as well as the geochemical evolution of waste in its disposal environment. Preliminary studies show that the design, construction, and operation of disposal sites have a major influence on releases. The underlying geochemical processes are at present only known in outline and provide a fascinating field for interdisciplinary studies. 

Scandiffio, G., Panichi, C. Valenti, M. 1995. Geochemical evolution of fluids in the Larderello Geothermal field. Proceedings of the World Geothermal Congress, Florence, Italy, 3, 1839-1943. 

The near field of the repository includes the engineered barrier system (EBS, i.e., canister and buffer) and the waste form. Also included in the near field is the interface between the buffer and the host rock, denoted as excavation disturbed zone (EDZ). In terms of waste/water interactions, the geochemical evolution of the near field is essential as it controls the composition of the fluids that will eventually contact the waste. 

Application of the collected thermodynamic data to model the oxidative alteration pathway of U02 under repositoiy conditions by using the PHREEQC code (Parkhurst Appelo 1999) is given in Fig. 1 la and b. Once the thermodynamic framework is set for the geochemical evolution of the repositoiy system, we have to take into consideration that for many of the processes involved, there will be some kinetic constraints. This is illustrated by Table 2, where a comparison of the expected lifetime for some of the phases expected in the repositoiy system is made. 

The kinetic mass transfer model developed to take into consideration the geochemical evolution of the Cigar Lake ore deposit was mainly done by simulating the evolution of the Al-Si system in the Cigar Lake ore deposit system. To this aim the system formed by kaoli-nite, gibbsite and illite as main aluminosilicate solid phases was considered and kinetics for the dissolution-precipitation processes were taken from the open scientific literature (Nagy et al. 

The following publications provide excellent summaries of the geologic and geochemical evolution of Mars ... 

Optical, infrared, x-ray, thermal, and chemical studies were carried out to characterize the anthraxolite and to determine its geochemical evolution. Some differences in the same properties were noted for different nodules hence, several nodules were pulverized together in order to have average anthraxolite for analyses. Sufficient material for determining compositional extremes and variation was not available. Present understanding suggests that neither properties nor composition vary widely. 

Sikdar, P.K., Sarkar, S.S. and Palchoudhury, S. (2001) Geochemical evolution of groundwater in the quaternary aquifer of Calcutta and Howrah, India. Journal of Asian Earth Sciences, 19, 579-94. 

Galloway, W. E. and Kaiser, W. R. "Catahoula Formation of the Texas Coastal Plain Origin, Geochemical Evolution, and Characteristics of Uranium Deposits" Report of Investigations No. 100, Bureau of Economic Geology The University of Texas at Austin Austin, Texas, 1980. 

In a recent paper (Marion et al. 2003a), we quantified a conceptual model for the surficial aqueous geochemical evolution of Mars. This model rests... 

Table 5.3. Martian and comparative solution compositions in the geochemical evolution of Mars. Reprinted from Marion et al. (2003a)... 

Schaefer MW (1990) Geochemical evolution of the Northern Plains of Mars Early hydrosphere, carbonate development, and present morphology. J Geophys Res 95 14,291-14,300... 

Dunai, T. X, Baur, H. (1995) Helium, neon, and argon systematics of the European subcontinental mantle Implications for its geochemical evolution. Geochim. Cosmochim. Acta, 59, 2767-83. 

The most sophisticated models applied to FePRBs to date combine multiple ADEs (i.e., multicomponent transport) with coupled chemical reactions [184,186,208]. These multicomponent reactive transport models were used to simulate the geochemical evolution in FePRBs for the treatment of TCE [184] and for remediating mixtures of Cr(VI) and chlorinated solvents [186,208]. The models are capable of reproducing the spatial distribution of field-observable parameters such as the concentrations of the chlorinated solvents, pH, Eh, alkalinity, Mg2 +, S042-, and N03 ... 

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