A geochronological study of detrital zircons from sedimentary rocks of the Gorinskaya (91 zircons with concordant ages), Pionerskaya (117 zircons with concordant ages), and Pivanskaya (115 zircons with concordant ages) formations of the Komsomolskaya Group has been carried out. It was found that the ²⁰⁶Pb/²³⁸U age of the youngest zircon population is consistent with the stratigraphic age only for the Pivanskaya Formation. For the other two formations, the youngest zircon populations turned out to be significantly younger than their upper stratigraphic limits. New evidence shows that: (1) the age of the “Berriasian–Valanginian” sediments of the Pionerskaya Formation is not older than the Barremian and (2) the age of the “Tithonian–Berriasian” deposits of the Gorinskaya Formation is not older than the Hauterivian. The subdivision of the Komsomolskaya Group into formations is based primarily on lithological criteria. However, since the composition of the formations is very similar, the identical deposits in other Lower Cretaceous sequences of the region could be assigned to other stratigraphic units. Thus, the above conclusion is valid only for the sections we studied.

对 Komsomolskaya 群的 Gorinskaya（91 个年龄一致的锆石）、Pionerskaya（117 个年龄一致的锆石）和 Pivanskaya（115 个年龄一致的锆石）地层的碎屑锆石进行了年代学研究。发现最年轻锆石群的²⁰⁶ Pb/ ²³⁸ U 年龄与仅 Pivanskaya 组的地层年龄一致。对于其他两个地层，最年轻的锆石种群被证明比它们的地层上限年轻得多。新证据表明：（1）Pionerskaya 组“Berriasian-Valanginian”沉积物的年龄不大于 Barremian 和（2）“ Tithonian-Gorinskaya 组的 Berriasian” 沉积物不比 Hauterivian 更古老。将 Komsomolskaya 群细分为地层主要基于岩性标准。然而，由于地层的组成非常相似，该地区其他下白垩统层序中的相同沉积物可以归入其他地层单元。因此，上述结论仅对我们研究的部分有效。