《Table 1 Boron isotopic composition of halite and borate》

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《A Multi–fluid Constrain for the Forming of Potash Deposits in the Savannakhet Basin: Geochemical Evidence from Halite》

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Boron isotopes were measured at the Qinghai Institute of Salt Lakes，Chinese Academy of Sciences（Table 1）.Determination of 11B/10B ratios（δ11B）required the samples to be purified prior to analysis；as such，halite was dissolved in solution and then diluted with low-boron water（p H=6–7）.These diluted solutions were passed through an Amberlite resin column at a flow rate of 2.5ml/min.Boron was then eluted from the resin using 12 ml of 0.1 mol/L HCl.The eluent was evaporated and dried at60°C，passed through another Amberlite resin column to remove unwanted ions，and then further purified using a low–boron eluent that contained equimolar amounts of mannitol and cesium carbonate（Cs2CO3）.Finally，the diluted eluents were evaporated and dried at 60°C，and then prepared for isotopic analysis.