The geodynamic evolution of the Dinaride Mountains of southeastern Europe is relatively poorly understood, especially in comparison with the neighboring Alps and Carpathians. Here, we construct a new chronostratigraphy for the post-orogenic intra-montane basins of the Central Dinarides based on paleomagnetic and 40Ar/39Ar age data. A first phase of basin formation occurred in the late Oligocene. A second phase of basin formation took place between 18 and 13 Ma, concurrent with profound extension in the neighboring Pannonian Basin. Our paleomagnetic results further indicate that the Dinarides have not experienced any significant tectonic rotation since the late Oligocene. This implies that the Dinarides were decoupled from the adjacent Adria and the Tisza–Dacia Mega-Units that both underwent major rotation during the Miocene. The Dinaride orogen must consequently have accommodated significant shortening. This is corroborated by our AMS data that indicate post-Middle Miocene shortening in the frontal zone, wrenching in the central part of the orogen, and compression in the hinterland. A review of paleomagnetic data from the Adria plate, which plays a major role in the evolution of the Dinarides as well as the Alps, constrains rotation since the Early Cretaceous to 48 ± 10° counterclockwise and indicates 20° of this rotation took place since the Miocene. It also shows that Adria behaved as an independent plate from the Late Jurassic to the Eocene. From the Eocene onwards, coupling between Adria and Africa was stronger than between Adria and Europe. Adria continued to behave as an independent plate. The amount of rotation within the Adria-Dinarides collision zone increases with age and proximity of the sampled sediments to undeformed Adria. These results significantly improve our insight in the post-orogenic evolution of the Dinarides and resolve an apparent controversy between structural geological and paleomagnetic rotation estimates for the Dinarides as well as Adria.

中文翻译：

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古地磁和地质年代学对中央第纳尔迪斯河地球动力学演化的限制

人们对东南欧迪纳里德山脉的地球动力学演化知之甚少，尤其是与邻近的阿尔卑斯山和喀尔巴阡山脉相比。在这里，我们基于古地磁和 40Ar/39Ar 年龄数据为中第纳尔山脉的造山后山地内盆地构建了一个新的年代地层学。盆地形成的第一阶段发生在渐新世晚期。盆地形成的第二阶段发生在 18 至 13 Ma 之间，同时发生在邻近的潘诺尼亚盆地的深度扩张。我们的古地磁结果进一步表明，自渐新世晚期以来，第纳尔山脉没有经历任何显着的构造旋转。这意味着 Dinarides 与相邻的 Adria 和 Tisza-Dacia Mega-Units 分离，两者都在中新世期间经历了主要的旋转。Dinaride造山带因此必须适应显着的缩短。我们的 AMS 数据证实了这一点，这些数据表明，中中新世后锋区缩短，造山带中央部分扭动，腹地压缩。对亚德里亚板块古地磁数据的回顾，在第纳尔山脉和阿尔卑斯山脉的演化中起着重要作用，将早白垩世以来的自转限制为逆时针 48 ± 10°，并表明自白垩纪以来发生了 20°的自转。中新世。它还表明，亚德里亚从晚侏罗世到始新世表现为一个独立的板块。从始新世开始，亚德里亚和非洲之间的耦合强于亚德里亚和欧洲之间的耦合。阿德里亚继续表现得像一个独立的板块。Adria-Dinarides 碰撞带内的旋转量随着年龄和采样沉积物与未变形的 Adria 的接近而增加。这些结果显着提高了我们对 Dinarides 造山后演化的认识，并解决了 Dinarides 和 Adria 的构造地质和古地磁旋转估计之间的明显争议。