Metasediments of the Paleozoic Bashibos-Bajrambos unit, comprising the western perimeter of the Serbo-Macedonian Massif in SE Republic of North Macedonia, were investigated by employing whole-rock geochemistry and detrital zircon geochronology to put constraints of age, provenance and depositional tectonic setting. The metasedimentary unit consists of polymetamorphic and highly altered pelitic mica-schists and phyllites and metamafic rocks. The first limited data from the whole-rock composition of the metapelites and zircon Th/U ratios suggest derivation of detrital material from felsic and recycled older upper crustal sources. At the same time, mafic samples indicate an origin from a volcanic source without a significant contribution from ultramafic rocks. Whole-rock data and the detrital zircon record suggest that deposition of the sequence took place in collision-related, foreland basin, formed by the merging of Pelagonian and the Serbo-Macedonian Massifs. The population of the youngest recorded zircons indicates Early Permian sedimentation. The detrital zircon record speaks for significant sedimentary input of old crustal material from the Serbo-Macednonian Massif, while younger Carboniferous-Permian magmatic zircon populations support the significant influence of the Pelagonian Massif.

通过采用全岩地球化学和碎屑锆石年代学方法对年龄，物源和沉积构造环境进行限制，对古生代Bashibos-Bajrambos单元的变质沉积物（包括北马其顿东南部的Serbo-Macedonian地块的西界）进行了研究。变质沉积单元由多变质的和高度变质的云母片岩和层晶岩和变质岩组成。来自变质岩全岩石成分和锆石Th / U比的最初有限数据表明，从长石质和回收的较旧的上地壳来源推导了碎屑物质。同时，镁铁质样品表明其来自火山岩源，而超镁铁质岩石则无明显贡献。全岩层数据和碎屑锆石记录表明，该层序的沉积发生在与碰撞有关的前陆盆地中，该盆地是由Pelagonian和Serbo-Macedonian断层合并而成的。记录的最年轻的锆石人口表明其早于二叠纪沉积。碎屑锆石记录表明来自塞尔维亚-马其顿地块的旧地壳物质有大量的沉积输入，而年轻的石炭纪-二叠纪岩浆锆石种群则支持了五角形山地块的重大影响。