Chemical evolution of the early Martian hydrosphere

摘要: The chemical evolution of the early Martian hydrosphere is discussed. ocean can be modeled as a body relatively pure water in equilibrium with dense carbon dioxide atmosphere. weathering lavas, pyroclastic deposits, and impact melt sheets would have effect neutralizing acidity juvenile water. As calcium other cations are added to by weathering, they quickly removed precipitation carbonate minerals, forming deposit limestone beneath surface ocean. atmospheric pressure temperature decrease, completely frozen. Given scenario for northern lowland plains Mars, it should possible draw few conclusions about expected mineralogy geomorphology this regions.