Thickness controls regolith production and evolution: Evidence from coupled U-series disequilibrium and cosmogenic nuclides

Table 1 a. Mineral composition of QHD regolith profile. b. Mineral composition of GTC regolith profile. Table 2 U, Th concentrations and (234U/238U), (230Th/232Th), (238U/232Th), (230Th/238U), (230Th/234U) activity ratios of QHD and GTC regolith profiles. Table 3 Regolith production rates (P) and parameters (t, ki, fi) derived from the “gain and loss” model for QHD and GTC profiles.表1 a. QHD风化层剖面的矿物组成；b. GTC风化层剖面的矿物组成。 表2 QHD与GTC风化层剖面的铀、钍浓度及(234U/238U)、(230Th/232Th)、(238U/232Th)、(230Th/238U)、(230Th/234U)活度比。 表3 基于“得失模型”推导得到的QHD与GTC风化层剖面的风化层形成速率（P）及参数（t、ki、fi）。