Isotopic Study at high precision of the Biogeochemical Cycle of Magnesium: Impact of terrestrial biology
Description
Understanding and quantifying the biogeochemical cycle of carbon during the alteration process was modeled according to different parameters. The assessment of the alteration balance of rocks and the determination of control factors is a major tool for understanding the Earth's climate. Chemical erosion of silicate and carbonate minerals in the long term plays an important role in the (Berner et al., 1983). Magnesium is a chemical soluble in water, it is mainly due to the alteration of rocks. The phenomenon of alteration is a preponderant factor in the regularization of the terrestrial climate by consuming atmospheric CO2. Moreover, this chemical element (Mg) represents a nutrient essential to life (plant growth). The objective of my thesis work is to develop a tool isotope to trace the biogeochemical cycle of Mg. My job will be to quantify and qualify the biogeochemical cycle at the small catchment scale. On the other hand, we will be interested in basins on a larger scale. The Himalayan and Taiwanese basins which are characterized by of alteration strongly influenced by the reaction kinetics. (author)
Abstract (French)
La comprehension et la quantification du cycle biogeochimique du Carbone lors du processus d'alteration a ete modelise en fonction de differents parametres. L'evaluation du bilan d'alteration des roches et la determination des facteurs de controle sont un outil majeur pour la comprehension du climat terrestre. L'erosion chimique des mineraux silicates et carbonates, sur le long terme, joue un role important dans la regularisation du climat (Berner et al. 1983). Le Magnesium est un element chimique soluble dans l'eau, il provient principalement de l'alteration des roches. Le phenomene d'alteration est un facteur preponderant dans la regularisation du climat terrestre en consommant du CO2 atmospherique. Par ailleurs, cet element chimique (Mg) represente un nutriment essentiel a la vie (croissance des plantes). L'objectif de mon travail de these est de developper un outil isotopique pour retracer le cycle biogeochimique du Mg. Mon travail consistera a quantifier et qualifier le cycle biogeochimique a l'echelle de petit bassin versant. D'autre part, nous allons nous interesser a des bassins a plus grande echelle. Les bassins Himalayen et Taiwanais qui sont caracterises par des processus d'alteration fortement influences par la cinetique reactionnelle. (auteur)
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Additional details
Additional titles
- Original title (French)
- Etude Isotopique du Cycle Biogeochimique du Magnesium a Haute Precision: Impact de la Biologie Terrestre
Publishing Information
- Imprint Pagination
- 270 p.
- Report number
- FRNC-TH--14786
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 54096000
- Subject category
- S54: ENVIRONMENTAL SCIENCES;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- BIOGEOCHEMISTRY; BIOTITE; DISSOLUTION; EROSION; FRACTIONATION; ICP MASS SPECTROSCOPY; ION EXCHANGE CHROMATOGRAPHY; ISOTOPE RATIO; MAGNESIUM 26; NEW ZEALAND; RIVERS; ROCK-FLUID INTERACTIONS; SOLUTES; TAIWAN; WATERSHEDS; WEATHERING
- Descriptors DEC
- ALKALINE EARTH ISOTOPES; ASIA; AUSTRALASIA; CHEMISTRY; CHINA; CHROMATOGRAPHY; DEVELOPED COUNTRIES; DIMENSIONLESS NUMBERS; EVEN-EVEN NUCLEI; GEOCHEMISTRY; ISLANDS; ISOTOPES; LIGHT NUCLEI; MAGNESIUM ISOTOPES; MASS SPECTROSCOPY; MICA; MINERALS; NUCLEI; SEPARATION PROCESSES; SILICATE MINERALS; SPECTROSCOPY; STABLE ISOTOPES; SURFACE WATERS
Optional Information
- Notes
- 401 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses