Influence of hydrothermal

Many drillings have been made for the purpose of the exploration of Kuroko deposits in the Green tuff region. A large number of petrographical and analytical data are available. Thus, it is possible to (1) assess the proportion of volcanic rocks that have suffered hydrothermal alteration, and (2) attempt a quantitative evaluation of the influence of hydrothermal alterations at back-arc basins on middle Miocene seawater chemistry. [Pg.408]

Shikazono, N. (1993) Influence of hydrothermal flux on arsenic geochemical balance of seawater. Chikyuka-gakii (Geochemistry), 27. 135-139 (in Japanese). [Pg.428]

Influence of Hydrothermal CO2 Flux on Tertiary Climate Change... [Pg.431]

In this section, Ishikawa (1996), and Kashiwagi et al. (2000) studies are described. Then, their calculated results are given, emphasizing the influence of hydrothermal and volcanic gas CO2 flux from back arc basins and island arc on CO2 concentration of atmosphere and climate change and are compared with the changes in CO2 and temperature obtained by analytical and paleontological data (S 0 of foraminiferal shell, Ce anomaly, 5 C, etc.). [Pg.439]

The influence of hydrothermal treatment on the concentration of Bransted sites, which are directly related to tetrahedrally framework aluminum, has been studied by FTIR spectroscopy in dependence on the Al content. A previously calcined and dehydrated H,A1-MCM-41, containing only ca. 20% of the initial Bransted acid sites, was in situ treated with water vapour at 80°C in the IR cell. After subsequent removal of loosely bound water by evacuation, which was controlled by the disappearance of the deformation mode of water at 1640 cm 1, ammonia was loaded to determine the change of the Bransted acidity. Based on the intensity of the BS band at 1450 cm 1, a distinct increase of the Bransted site content is found (Fig. 2). In comparison with the ammonium exchanged MCM-41, the amount of Bransted sites rises to 53% of the initial value observed with the ammonium exchanged MCM-41. [Pg.248]

Influence of Hydrothermal Treatment on Sorption and Diffusion Properties of a Silicalite... [Pg.390]

Tivey M. K. (1995) The influence of hydrothermal fluid composition and advection rates on black smoker chimney mineralogy—insights from modelling transport and reaction. Geochim. Cosmochim. Acta 59, 1933-1949. [Pg.3072]

Determining the influence of hydrothermal circulation on the mass balance of chemical constituents in seawater boils down to knowing how much water flows through the hydrothermal areas and how important the reactions at high temperature are to the total hydrothermal flux. There is presently a lot of dehate about these issues. The rest of this chapter is devoted to an explanation of how one goes about interpreting hydrothermal fluxes from observed changes in hydrothermal chemistry. [Pg.50]

Influence of hydrothermal treatment on the features of disordered DWM materials... [Pg.1028]

Table 3. Influence of hydrothermal aging on EAH-USY and traditional USY zeolite...

Hirano, M., and K. Matsushima, Photoactive and adsorptive niobium-doped anatase (TiOj) nanoparticles Influence of hydrothermal conditions on their morphology, structure, and properties. J. Am. Ceram. Son. 89 (2006) 110-117. [Pg.257]

M., and Jaroniec, M. (1997) Characterization of large-pore MCM-41 molecular sieves obtained via hydrothermal restructuring. Chem. Mater., 9 (11), 2499-2506 (d) Kruk, M., Jaroniec, M., and Sayari, A. (1999) Influence of hydrothermal restructuring conditions on structural properties of mesoporous molecular sieves. Microporous Mesoporous Mater., 27 (2-3), 217-229 (e) Kruk, M., Jaroniec, M., and Sayari, A. (1999) A unified interpretation of high-temperature pore size expansion processes in MCM-41 mesoporous silicas. J. Phys. Chem. B,... [Pg.156]

Zhu, X., Liu, Y., Qian, F., Zhang, S., Chen, J., 2015. Investigation on the physical and chemical properties of hydrochar and its derived pyrolysis char for their potential application influence of hydrothermal carbonization conditions. Energy Fuels, http //dx.doi.org/ 10.1021/acs.energyfuels.5b00512, 150623202050003. [Pg.672]

Fig. 4. Influence of hydrothermal treatment time and temperature on side crushing strength of alumina extrudates.

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