The endoergic nature of protein and nucleic acid assembly in aqueous media presents two questions that are fundamental to the understanding of life's origins: (i) how did the polymers arise in an aqueous prebiotic world; and (ii) once formed in some manner, how were they sufficiently persistent to engage in further chemistry. We propose here a quantitative resolution of these issues that evolve...

Marine Mg-evaporites are a small oceanic sink of magnesium, precipitating only from extremely evaporated brines. The isotopic composition Mg in seawater, δ26Mgseawater, has recently been shown to be an effective tool for reconstructing the budget modern and past oceans. However, estimations isotope fractionation between their solution required full quantification effect evaporitic on as well ut...

Introduction. The current hypothesis is that Martian sinkholes do not exist. It is proposed that the low pH environment resulting from the high CO2 content of the atmosphere will cause calcium carbonate to be deposited as calcite cemented sandstone rather than limestone [5]. Calcite, as well as gypsum, halite, smectite and illite, has been detected in Martian meteorites providing proof of the p...

Krypton-81 dating provides new insights into the timing, mechanisms, and extent of meteoric flushing versus retention saline fluids in subsurface response to changes geologic and/or climatic forcings over 50 ka 1.2 Ma year timescales. Remnant Paleozoic seawater-derived brines associated with evaporites Paradox Basin, Colorado Plateau, are beyond 81Kr range (>1.2 Ma) have likely been preserved d...

The temporal-spatial coincidence of saline deposits with rifting and alkaline magmatism has now become a commonly accepted fact. The congruency of these three phenomena implies logically, their trilateral genetic interrelation. The conventional concept for the formation of saline deposits, i.e an "evaporation process" can not be properly applied to giant saline deposits. The proposed "Volc...

Hygroscopic salts have been detected in soils in the northern latitudes of Mars, and widespread chloride-bearing evaporitic deposits have been detected in the southern highlands. The deliquescence of hygroscopic minerals such as chloride salts could provide a local and transient source of liquid water that would be available for microorganisms on the surface. This is known to occur in the Ataca...