A garnet-bearing schist from the southernmost such exposure along the Himalaya in east central Nepal records prograde metamorphism at 32.4 ± 0.3 Ma. Phase equilibria modelling, combined with Ti-in-biotite and quartz c-axis thermometry, outline a tight-to-hairpin pressure-temperature (P-T) path extending from ∼515 °C and 5.5 kbar to peak conditions at ∼575 °C and 7 kbar followed by deformation during the retrograde phase at 480–515 °C and 6–7 kbar. The new Lu-Hf data place an upper bound on the evolution of metamorphism and deformation in the frontal-most part of the Himalaya, which lasted until 17.5 Ma, as constrained by previously published ⁴⁰Ar/³⁹Ar data. The P-T-time data from for this part of the Himalaya, as well as from more hinterland-ward portions of the orogen, outline a progressive, stepwise, commonly out-of-sequence evolution. Further data from along the orogen indicates that this evolution is not a local phenomenon, but instead characterizes the tectonics of this system as a whole.

尼泊尔东部中部喜马拉雅山最南端的一种带石榴石的片岩记录了32.4±0.3 Ma的变质变质。相平衡建模与黑云母中的钛和石英c轴测温法相结合，勾勒出发夹压力-温度（PT）的紧密路径，从515°C和5.5 kbar延伸到575°C和750°C的峰值条件。 7 kbar，然后在480–515°C和6–7 kbar的逆行阶段变形。新的Lu-Hf数据为喜马拉雅山最前部的变质作用和变形演化提供了一个上限，这种变化一直持续到17.5 Ma，受先前发表的⁴⁰ Ar / ^39的约束Ar数据。来自喜马拉雅山这部分以及造山带腹地更多部分的PT时间数据概述了渐进的，逐步的，通常无序的演化。来自造山带的进一步数据表明，这种演化不是局部现象，而是表征了整个系统的构造。