New Computerized Method for the Geochemical Classification of Precambrian Carbonate Rocks: Case of a Set of African Cap Carbonates
| Autor: | Olivia Mickala, Pascal Affaton, Roland Simler, Hélène Miche, Florent Boudzoumou, Michel Mbina |
|---|---|
| Přispěvatelé: | Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Laboratoire d'Hydrogéologie d'Avignon (LHA), Avignon Université (AU), Département de Géologie, Université de Brazzaville, Université des Sciences et Techniques [Masuku] (USTM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Université des Sciences et Techniques de Masuku [Franceville, Gabon] (USTM), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Faculté des Sciences [Université des Sciences et Techniques de Masuku], Université des Sciences et Techniques de Masuku (USTM)-Université des Sciences et Techniques de Masuku (USTM) |
| Rok vydání: | 2013 |
| Předmět: |
Calcite
010504 meteorology & atmospheric sciences Dolomite Diagram Geochemistry Ternary plot Mineralogy [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010502 geochemistry & geophysics [SDE.ES]Environmental Sciences/Environmental and Society 01 natural sciences Cap carbonate Cap Carbonate Set (abstract data type) Precambrian chemistry.chemical_compound chemistry Ternary Diagram Carbonate rock Carbonate Rock Software Geology 0105 earth and related environmental sciences |
| Zdroj: | International Journal of Geosciences International Journal of Geosciences, Scientific Research 2013, 4 (10A), pp.37-49. ⟨10.4236/ijg.2013.410A005⟩ International Journal of Geosciences, 2013, 4 (10A), pp.37-49. ⟨10.4236/ijg.2013.410A005⟩ |
| ISSN: | 2156-8367 2156-8359 |
| DOI: | 10.4236/ijg.2013.410a005 |
| Popis: | International audience; Post-sedimentary transformations have masked or completely obliterated the structures and textures of Precambrian carbonate rocks. Therefore, methods of classification of the carbonate rocks founded on the observation of primary structures or textural characteristics are ill-adapted. Consequently, only certain geochemical classification methods al- low us to distinguish the various rock-types in the case of Neoproterozoic carbonates. After presenting the most suit- able geochemical classifications, we propose a new classification into 14 groups based on a regular ternary diagram with computerized data input. For each sample of carbonate rock, analysis of calcium and magnesium contents allows us to calculate the input data for our diagram i.e. the percentages of Calcite, Dolomite and Insoluble Residue. To auto- mate the application of this diagram, input parameters are created in a descriptive file "Roches.ternaires.txt" using an option called "Ternaires" in the "Diagrammes" software developed by Roland Simler. Thirty cap carbonates of Africa are used to validate this new method. |
| Databáze: | OpenAIRE |
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