Reconstructing orogenic systems made up dominantly by sediments accreted in trenches is challenging because of the incomplete lithological record of the subducted oceanic domain and its attached passive continental margin thrusted by collisional processes. In this respect, the remarkable ~600 km long continuity of sediments exposed in the Eastern Carpathian thin‐skinned thrust and fold belt and the availability of quantitative reconstructions for adjacent continental units provide excellent conditions for a paleogeographical study by provenance and sedimentological techniques constraining sediment routing and depositional systems. These sediments were deposited in the Ceahlău‐Severin branch of the Alpine Tethys Ocean and over its European passive continental margin. We report sedimentological, paleomagnetic, petrographic, and detrital zircon U‐Pb data of Lower Cretaceous sediments from several thin‐skinned tectonic units presumably deposited in the Moldavides domain of the Eastern Carpathians. Sedimentological observations in the innermost studied unit demonstrate that deposition took place in a deepwater basin floor sheets to sandy turbidite system. Detrital zircon age data demonstrate sourcing from internal Carpathian basement units. The sediment routing changes in more external units, where black shales basin floor sheets to sandy mud turbidites were sourced from an external, European continental area. Although some degree of mixing between sources located on both margins of the ocean occurred, constraining a relatively narrow width of the deep oceanic basin, these results demonstrate that the internal‐most studied unit was deposited near an Early Cretaceous accretionary wedge, located on the opposite internal side relative to the passive continental margin domain of other Moldavides units.

中文翻译：

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东喀尔巴阡山脉下白垩纪物源和沉积沉积：俯冲洋域及其欧洲被动大陆边缘演化的推论

由于俯冲洋域及其附着的被动大陆边缘的岩性记录不完整，因此重建主要由海沟中沉积物组成的造山系统具有挑战性。在这方面，东喀尔巴阡山脉薄皮冲断褶皱带中暴露的沉积物长达 600 公里的显着连续性以及相邻大陆单元的定量重建的可用性为通过限制沉积物路径的物源和沉积学技术进行古地理研究提供了极好的条件和沉积系统。这些沉积物沉积在高山特提斯洋的 Ceahlău-Severin 分支及其欧洲被动大陆边缘。我们报告沉积学、古地磁、岩相学、下白垩纪沉积物的碎屑锆石 U-Pb 数据来自几个可能沉积在东喀尔巴阡山脉的摩尔达维亚地区的薄皮构造单元。最内部研究单元的沉积学观察表明，沉积发生在深水盆地底板到砂质浊积岩系统中。碎屑锆石年龄数据表明来自内部喀尔巴阡地下室单元。沉积物路线在更多外部单元中发生变化，其中黑色页岩盆地底板到砂质泥浊积岩来自外部的欧洲大陆区域。尽管位于大洋两侧的源之间发生了某种程度的混合，限制了深海盆地的相对狭窄的宽度，