Results are presented on the relationships between the vitrinite reflectance VR_o, the T_max temperatures determined with Rock-Eval pyrolysis, and the smectite (S) indices representing the percentage of smectite in the mixed-layer illite-smectite (I/S) from claystones. Samples locations are recovered from the Polish part of the Outer Carpathian fold-and-thrust belt. Organic indices show thermal maturities of most outcrop samples in the range of 0.47 to 1.49% R_o and 421 to 485 °C T_max. Inorganic S indices values range from 8 to 60%. Lateral variability of the maturity measured with both organic and inorganic indices reflects mainly differences of maximum tectonic burial in the accretionary prism and subsequent exhumation and denudation. For the Western Outer Carpathians the calculated formulae for T_max to VR_o and S to VR_o conversion are VR_o = 0.0152 * T_max - 5.938 (r² = 0.87) and VR_o = 1.1432–0.01295 * S (r² = 0.65), respectively. Maximum paleotemperatures were calculated for individual samples from S indices by applying the novel formula T = ln (1.1432–0.01295 * S) + 1.68/0.0124. The proposed new conversion formulae might be useful in other regions with a similar geological setting, i.e. for claystone formations dominated by kerogen type III in fold–and-thrust belts, characterized by rapid tectonic burial accompanied by a low geothermal gradient, as well as maturities of the sub-bituminous to the medium volatile bituminous rank (0.5 to 1.50% R_o).

结果显示了镜质体反射率VR _o，用Rock-Eval热解法测定的T_最高温度和代表蒙脱石在I / S混合层中蒙脱石百分比的蒙脱石（S）指数之间的关系。粘土岩。样品位置从喀尔巴阡山脉褶皱冲断带的波兰部分回收。有机指数显示大多数露头样品的热成熟度在0.47至1.49％R _o和421至485°CT_{最大范围内}。无机S指数值的范围为8％至60％。用有机和无机指标测得的成熟度的横向变化主要反映了增生棱镜中最大的构造埋葬以及随后的掘出和剥蚀的差异。对于西部喀尔巴阡山脉地区，T _max到VR _o以及S到VR _o的转换公式为VR _o  = 0.0152 * T _max -5.938（r ²  = 0.87）和VR _o  = 1.1432–0.01295 * S（r ² = 0.65）。通过应用新公式T = ln（1.1432–0.01295 * S）+ 1.68 / 0.0124，可以从S指数计算单个样品的最高古温度。拟议的新转换公式可能在地质背景相似的其他地区有用，例如，在褶皱-冲断带中以干酪根类型III为主的粘土岩地层，其特征是快速的构造埋葬以及低的地热梯度以及成熟度到中等挥发性沥青等级（0.5至1.50％R _o）的次沥青。