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排序方式: 共有165条查询结果,搜索用时 78 毫秒
161.
Olivier Hébrard Séverin Pistre Nicolas Cheynet Jean Dazy Christelle Batiot-Guilhe Jean-Luc Seidel 《Comptes Rendus Geoscience》2006,338(10):703-710
The origin of chloride-rich karstic spring waters representative of the Languedoc-Roussillon region has been investigated with a hydrochemical approach. To this end, the major and trace elements most often used in the study of saline environments have been considered (Cl, SO4, Br, B, Li). This study allowed distinguishing the different end-members of the various chloride-rich karstic spring waters (evaporitic, marine, geothermal). Associated with the Cl, Br and B contents, the Li/SO4 ratio appeared as a relevant tracer for the determination of the origin of lithium and by extension of the considered waters. To cite this article: O. Hébrard et al., C. R. Geoscience 338 (2006). 相似文献
162.
Elisa Sacchi Jean-Luc Michelot Helmut Pitsch Philippe Lalieux Jean-François Aranyossy 《Hydrogeology Journal》2001,9(1):17-33
This paper summarises the results of a comprehensive critical review, initiated by the OECD/NEA "Clay Club," of the extraction
techniques available to obtain water and solutes from argillaceous rocks. The paper focuses on the mechanisms involved in
the extraction processes, the consequences on the isotopic and chemical composition of the extracted pore water and the attempts
made to reconstruct its original composition. Finally, it provides some examples of reliable techniques and information, as
a function of the purpose of the geochemical study.
Electronic Publication 相似文献
163.
Jacques Boulgue Jean T. Iiyama Jean-Luc Charlou Jacques Jedwab 《Earth and Planetary Science Letters》1987,83(1-4)
Deep-water samples collected during the Kaiko project are often associated with biological communities located on geological structures favorable to fluid venting. The evidence of fluid venting are the temperature anomalies, the decrease in sulfate concentrations, the content in methane and the lowC1(C2 +C3) ratio of light hydrocarbons. Because of large dilution by ambiant seawater during sampling it is difficult to compute the composition of the advected end-member pore fluid. Part of this fluid should originate in the “petroleum window”, i.e. at temperature about 60°C. Modeling the upward flow of water, taking into account the anomalies of temperature measured on the seafloor and the geochemical anomalies, leads to non-steady-state advection of the pore fluid. The occurrence of a deep component in the fluid has implications for the geological and tectonic models of the subduction zones off Japan. 相似文献
164.
165.
Rabah Bensalem Jean-Luc Chatelain Djamel Machane El Hadi Oubaiche Assia Bouchelouh Nassima Benkaci Hakim Moulouel Souhila Chabane Mustapha Hellel 《Arabian Journal of Geosciences》2017,10(13):282
Ambient vibrations have been continuously recorded at Dar El Beida, about 20 km from Algiers (Algeria). This data set allows determining that, in the low-frequency domain (<1 Hz), ambient vibration sources are mainly linked to Mediterranean Sea effects, while in the high-frequency domain, they are closely related to anthropogenic activity. Climatic conditions have an influence on the ambient vibration spectral amplitudes in the low-frequency domain, which is not the case in the high-frequency domain. The limit between the low-frequency and high-frequency domain, based on natural versus anthropogenic activity, is not clear cut and lies between 1.25 and 1.50 Hz. Variations of H/V peak amplitudes in the low-frequency domain are clearly linked to the climatic conditions. In the high-frequency domain, H/V peaks are not related to climatic conditions and cannot be clearly related to anthropogenic source changes. 相似文献