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Soil micromorphology. --- Regolith. --- GG --- RMCA

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Groundwater --- Water quality --- Regolith --- Carbonate rocks --- Water resources development

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The goal of this master’s thesis iw to better understand Mars and its complex processes and more specifcally to understand if the heterogeneity of the martian regolith may impact the degassing of volatile due to small impactors.To do so the increase of temperature as a result of impact energy is theoretically and numerically investigated. A modelisation of the increase of impact-induced temperature is proposed with an analytcial method : the Murnaghan equation of state.Then a comparison with a hydrocode (numerical method) is considered. To study the environmental effect, the evolution of the temperature following an impact for a martian year is calculated using the Crank-Nicholson method. The effect of the heterogeneity of the martian subsurface is then studied with the use of different plausible scenarii of different locations of interest on Mars. Finally, the results for each scenarii are compared with the depth of the ice table or the clathrate stability zone to assess its destabilization and thus degassing of methane.

Mars --- Impacts --- methane --- Regolith --- model --- Physique, chimie, mathématiques & sciences de la terre > Aérospatiale, astronomie & astrophysique

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Soils --- Earth (Soils) --- Mold, Vegetable --- Mould, Vegetable --- Soil --- Vegetable mold --- Agricultural resources --- Plant growing media --- Regolith --- Land capability for agriculture

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Interpretation of Micromorphological Features of Soils and Regoliths, Second Edition, provides researchers and students with a tool for interpreting features observed in soil thin sections and through submicroscopic studies. After an introduction and general overview, micromorphological aspects of regoliths (e.g., saprolites, transported materials) are highlighted, followed by a systematic and coherent discussion of the micromorphological expression of various pedogenic processes. The book is written by an international team of experts in the field, using a uniform set of concepts and terminology, making it a valuable interdisciplinary reference work.The following topics are treated: freeze-thaw features, redoximorphic features, calcareous and gypsiferous formations, textural features, spodic and oxic horizons, volcanic materials, organic matter, surface horizons, laterites, surface crusts, salt minerals, biogenic and pedogenic siliceous materials, other authigenic silicates, phosphates, sulphidic and sulphuric materials, and features related to faunal activity. The last chapters address anthropogenic features,archaeological materials and palaeosoils.

Soil micromorphology. --- Regolith. --- Mantle rock --- Overburden (Geology) --- Rhegolith --- Rock mantle --- Micropedology --- Soil microscopy --- Soils --- Soil structure --- Microscopy --- Analysis