We have investigated successive episodes of ocean-continent and continent–continent convergence in Western Serbia (Drina-Ivanjica thrust sheet). The coupled application of structural and petrological analyses with Illite Crystallinity measurements and K/Ar dating has revealed the timing and structural characteristics of multiple regional deformation phases, and allowed us to revise the origin of the different Triassic units outcropping in the study area. D1 tectonic burial was characterized by anchizonal metamorphism, dominantly WNW-verging isoclinal folding (F1), and related axial planar cleavage (S1) formation in the Paleozoic basement and the stratigraphic cover of the Drina-Ivanjica thrust sheet exposed along the northern rim of this thrust sheet. The timing of D1 deformation is constrained by K/Ar ages suggesting 135–150 Ma tectonic burial for the Drina-Ivanjica thrust sheet. D1 deformation and metamorphism is correlated with the closure of the Vardar ocean by top-W to NW ophiolite obduction and the underthrusting of the Adriatic distal passive margin below the oceanic upper plate. Since D1 structures are lacking in the southern occurrences of Triassic rocks within the study area it is proposed that this Triassic is may not be the original sedimentary cover of the Drina-Ivanjica Paleozoic basement. We propose that this southern Triassic originated from a more external Dinaridic thrust sheet and was transported to its present-day position by a top-NE backthrust presumably during late Early Cretaceous–Paleogene times. Map-scale, NW–SE striking D2 thrust faults and abundant NW–SE trending F2 folds observed in all units correspond to the general trend of the Dinaridic orogen and are attributed to the latest Cretaceous–Paleogene collision between Adria and Europe. Regional Latest Cretaceous–Paleogene shortening was followed by strike-slip tectonics (N–S shortening and perpendicular extension) and subsequent Miocene normal faulting in both orogen-parallel and orogen-perpendicular directions driven by slab rollback processes of the Carpathian-Dinaridic realm.

中文翻译：

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Drina-Ivanjica冲断层的构造和年代学约束（西塞尔维亚）：对内部第纳里德群岛的白垩纪-古近纪构造的影响

我们调查了西塞尔维亚海陆大陆和大陆-大陆融合的连续事件（德里纳-伊万吉卡逆冲片）。结构和岩石学分析与伊利石结晶度测量和K / Ar测年的结合应用揭示了多个区域变形阶段的时间和结构特征，并允许我们修改研究​​区域不同三叠纪单元露头的起源。D1构造埋葬的特征是沿地带变质，主要为WNW汇聚的等腰斜折（F1）以及在古生代基底和Drina-Ivanjica冲断层的地层沿该区域的北缘暴露的相关轴向平面劈理（S1）形成。推力板。D1变形的时间受到K / Ar年龄的限制，这表明Drina-Ivanjica逆冲板块的埋藏构造为135-150 Ma。D1变形和变质作用与瓦顶封闭至西北蛇绿岩引致的瓦达尔海的封闭和大洋上板下方亚得里亚海远侧被动边缘的逆冲作用有关。由于研究区域内三叠纪岩石的南部不存在D1结构，因此建议该三叠纪可能不是Drina-Ivanjica古生代基底的原始沉积盖层。我们认为，这个三叠纪南部起源于一个更外部的狄拉尼迪克冲断层，大概是在早白垩世-古生代时期被一次东北新的逆冲推力运到了现在的位置。地图比例尺 在所有单元中发现的北西向东南走向的D2逆冲断层和大量北西向东南走向的F2褶皱与二叠纪造山带的总体趋势相对应，并归因于阿德里亚和欧洲之间最新的白垩纪-古近纪碰撞。区域性最新白垩纪-古近纪缩短，其后为走滑构造（NS缩短和垂直伸展），随后在喀尔巴阡-迪纳拉德界的板块回滚过程驱动的造山带平行和造山带垂直方向上的中新世正断层。