Abstract The Na/K ratio in feldspars in sediment has been proven to be a stable and predictable index. The relationship between the sediment and its source in terms of the Na/K ratio in feldspars can be defined using the mass-balance model combined with the feldspar weathering kinetics as K 1 = γ ∗ K 0 γ = 1 − t t Na − L 0.39 1 − t t K − L 0.39 where K0 and K1 are the Na/K ratios in feldspars in the parent rocks and sediment, respectively; t represents the time interval; γ is the ratio of K1 to K0; and tNa-L and tK-L are the lifetimes of Na-containing and K-containing feldspars, respectively. According to this model, the change in the Na/K ratio in feldspars as a function of time for different combinations of feldspars can be predicted. Further, tNa-L and tK-L can be replaced by the lifetimes of the Na-containing and K-containing feldspars with the shortest lifetimes, respectively, if there are other types of feldspars. The ratio depends on the time interval and feldspar lifetime. The Na/K ratio in feldspars changes by

中文翻译：

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长石中钠钾比作为追溯沉积物来源的可预测指标：基于质量平衡模型结合长石风化动力学和案例研究

摘要 沉积物中长石的Na/K比已被证明是一个稳定且可预测的指标。沉积物与其来源在长石中 Na/K 比方面的关系可以使用质量平衡模型结合长石风化动力学定义为 K 1 = γ ∗ K 0 γ = 1 − tt Na − L 0.39 1 − tt K − L 0.39 其中 K0 和 K1 分别是母岩和沉积物中长石的 Na/K 比值；t 表示时间间隔；γ 是 K1 与 K0 的比值；tNa-L 和 tK-L 分别是含钠长石和含钾长石的寿命。根据该模型，可以预测长石中 Na/K 比率随时间的变化对于不同长石组合的变化。更多，tNa-L 和 tK-L 可以分别用寿命最短的含钠长石和含钾长石的寿命代替，如果有其他类型的长石。该比率取决于时间间隔和长石寿命。长石中的 Na/K 比变化为