This provenance study focuses on detrital rutile grains from Jurassic sandstones of the Bayırköy Formation in the central Sakarya Zone. Cr and Nb concentrations of detrital rutile grains in the Jurassic sandstones vary from 18 to 6855 μg/g and 70–13440 μg/g, respectively. Source area discrimination based on the Cr-Nb concentrations shows that 79 % of the detrital rutile grains originated from metapelitic and 21 % from metamafic rocks. The calculated rutile formation temperatures vary from 471 to 798 ℃ with an average temperature of 635 ℃ at P=10 kbar. Zr-in-rutile thermometer gives overlapping temperatures for all detrital rutile grains from both the metapelitic and metamafic sources. This demonstrates that most of the detrital rutiles sourced from metapelitic and metamafic rocks underwent similar metamorphic conditions and have similar metamorphic history. The U-Pb rutile dating yielded ages for the detrital rutiles in the time range of 346 to 319 Ma, which gives the age of metamorphism for the potential source rocks. Trace element compositions, Zr-in-rutile thermometer and U-Pb rutile geochronology show that detrital rutile grains were predominantly derived from early Carboniferous rocks that underwent metamorphism in amphibolite-facies conditions. Amphibolite-facies rocks of the Sarıcakaya Massif in the central Sakarya Zone seem to be the primary source lithologies for the detrital rutiles in the Jurassic Bayırköy Formation as it comprises previously-mentioned source lithologies and has a close geographic position to the area studied. Carboniferous Variscan metamorphism was followed by emplacement of numerous post-collisional granitoids in the central Sakarya Zone.

该物源研究的重点是萨卡里亚地区中部Bayırköy组侏罗纪砂岩的碎屑金红石晶粒。侏罗纪砂岩中碎屑金红石颗粒的Cr和Nb浓度分别为18至6855μg/ g和70–13440μg/ g。基于Cr-Nb浓度的源区判别表明，碎屑金红石颗粒的79％来自变质岩和21％来自变质岩。在P = 10 kbar时，计算出的金红石形成温度在471至798℃之间变化，平均温度为635℃。金红石中的Zr温度计给出了来自变源和变质的来源的所有碎屑金红石晶粒的重叠温度。这表明，大多数来源于变质岩和变质岩的碎屑金红石经历了相似的变质条件，并具有相似的变质历史。U-Pb金红石定年产生的碎屑金红石年龄在346至319 Ma的时间范围内，这给出了潜在烃源岩的变质年龄。微量元素组成，金红石中的Zr温度计和U-Pb金红石年代学表明，碎屑金红石颗粒主要来自在闪石相条件下经历了变质作用的早期石炭纪岩石。萨卡里亚地区中部Sarıcakaya地块的闪长岩相岩似乎是侏罗纪Bayırköy组中碎屑金红石的主要烃源岩性，因为它包括前面提到的烃源岩岩性，并且与所研究区域的地理位置接近。石炭纪瓦里斯坎变质作用之后，在萨卡里亚中央带安置了许多碰撞后的花岗岩。