Exotic clasts present in flysch deposits of the Western Outer Carpathians enable investigation and reconstruction of the eroded crystalline basement of the Silesian Ridge. The flysch rocks of the Istebna Formation (Jasnowice Member: Paleocene) in the Silesian Nappe contain magmatic and metamorphic clasts derived from the Silesian Ridge basement. The crystalline rock fragments acquired from cohesive debrites were analyzed petrographically and geochemically, and zircon and rutile crystals were subject to LA-ICP-MS U-Pb dating. Granitoid clasts yielded Meso-Variscan U-Pb zircon ages (325.7 and 330.6 Ma), with older (Neoproterozoic to Paleoproterozoic) inherited cores and eN₃₃₀ = –12.0 (TDM age of 1.98 Ga). The orthogneiss clast yielded a protolith age of 1635 Ma and fingerprint of thermal reworking at ~288 Ma. Zircon crystals from the detrital clasts yielded similar U-Pb zircon ages to the granitoid clasts (311.5 to 391 and 331 Ma). The rutile crystals from sandstone yielded concordia age of 344.7 Ma. Zircon crystals from paragneiss, interpreted as a granitoid envelope, yielded ²³⁸U/²⁰⁶Pb ages between 557 and 686 Ma and include an inherited core of age ~1207.4 ±33.8 Ma. Age data from exotic clasts and the detrital zircon and rutile fraction suggest the core part of the Silesian Ridge was a Neoproterozoic to Mesoproterozoic envelope intruded by Meso-Variscan granitoid plutons

外喀尔巴阡山脉西部复理石矿床中的外来碎屑使得能够调查和重建被侵蚀的西里西亚山脊结晶基底。西里西亚推覆区 Istebna 组（Jasnowice 组：古新世）的复理石岩石含有源自西里西亚山脊基底的岩浆和变质碎屑。对从粘性碎屑中获得的结晶岩石碎片进行岩石学和地球化学分析，并对锆石和金红石晶体进行 LA-ICP-MS U-Pb 测年。花岗岩碎屑产生中-华力西 U-Pb 锆石年龄（325.7 和 330.6 Ma），较老的（新元古代至古元古代）继承岩心和 eN ₃₃₀= –12.0（TDM 年龄 1.98 Ga）。正片麻碎屑产生了 1635 Ma 的原岩年龄和约 288 Ma 的热改造指纹。来自碎屑碎屑的锆石晶体产生了与花岗岩碎屑相似的 U-Pb 锆石年龄（311.5 至 391 和 331 Ma）。砂岩中的金红石晶体产生的康科迪亚年龄为 344.7 Ma。来自 paragneiss 的锆石晶体被解释为花岗岩外壳，在 557 和 686 Ma 之间产生了²³⁸ U / ²⁰⁶ Pb 年龄，并且包括一个年龄约为 1207.4 ±33.8 Ma 的遗传核心。来自外来碎屑和碎屑锆石和金红石部分的年龄数据表明，西里西亚海脊的核心部分是由中-华力斯坎花岗岩体侵入的新元古代至中元古代包裹体