Boron Enrichment in Martian Clay

The influence of organic matter on the boron isotope geochemistry of the gulf coast sedimentary basin, USA

Large variations in the boron isotopic composition of sedimentary environments make boron an attractive monitor of fluidrrock interactions during diagenesis. Studies of B in marine sediments have shown that preferential adsorption of B on clay minerals leaves pore waters enriched in B. During diagenesis, clay minerals recrystallize and incorporate B into Ž the mineral structure Spivack, A.J., P...

Radiation attenuation of boron doped clay for 662, 1173 and 1332 keV gamma rays

Background: Radiation shielding properties is an important for a material wish can be used the photon attenuation coefficients of clay produced using different rate of boron have been measured for the purpose of radioactive waste disposal. Materials and Methods: The measurement has been performed using gamma spectrometer contains NaI (Tl) detector at the photon energies of 662, 1173 an...

Clay enrichment ratio in sediment from a small agricultural watershed in iran

Minimum times to Form Clay in Martian Surface and Near-surface

Introduction: Clay minerals are the most common alteration products of water-rock-gas interactions on Earth. Because these hydrous alteration minerals are thermodynamically stable over a wide range of P-T-x conditions [1], significant amounts of clay may have also formed in Martian environments where liquid water or water vapor was present. It has been speculated that liquid water or vapor may ...

Chromatographic observation of boron isotopic fractionation between kaolin clay and boron bearing solution: A high pressure experiment

In order to determine the boron isotopic fractionation factor between boron adsorbed onto kaolin clay and boron in solution (S), as a first attempt, a break-through column chromatography at a high pressure (12.0 MPa) was performed. A boric acid standard solution (9.25 mmol/l, NIST SRM 951) was fed into a stainless steel column packed with boron-free kaolin clay with the flow rate of 0.8 ml/h. T...