The Dacian Basin was uniquely situated to record late Miocene hydrological changes that influenced depositional environments and faunal dispersal patterns in Central Eurasia's mega-lake Paratethys. Differences between the high strontium isotope ratio (⁸⁷Sr/⁸⁶Sr) of the waters from Lake Pannon and local Carpathian rivers and low ⁸⁷Sr/⁸⁶Sr of the Eastern Paratethys (Black Sea ‒ Caspian Sea) allow a thorough investigation of connectivity and water fluxes in the transient Dacian Basin. We present a detailed ⁸⁷Sr/⁸⁶Sr record for the Dacian Basin, which provides an exceptional record of basin connectivity from the latest Tortonian (ca. 7.7 Ma) until the early Pleistocene (ca. 1.8 Ma). Data show that a late Tortonian transgression (7.6–7.4 Ma) started with an incursion of Eastern Paratethys waters into the Dacian Basin, after which local rivers became the dominant source for the mostly freshwater environments of the early Messinian. The regional Maeotian-Pontian transitional interval (6.3–5.9 Ma) records a second incursion of Eastern Paratethys waters, but this time with an additional marine (Mediterranean) influx coinciding with a short-lived salinity incursion. During the Messinian Salinity Crisis of the Mediterranean, the Dacian Basin progressively connected with the Eastern Paratethys (5.9–5.5 Ma), after which it became restricted during the peak Mediterranean lowstand (5.5 Ma) and filled with Lake Pannon and local river water (5.5–5.3 Ma). During the Plio-Pleistocene, the Dacian Basin reconnected with the, at that time isolated, Black Sea, which shows similar ⁸⁷Sr/⁸⁶Sr as in the Last Glacial Maximum.

中文翻译：

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受限盆地的水文变化：锶同位素对东帕特提斯（罗马尼亚达契亚盆地）晚中新世-上新世连通性的洞察

达契亚盆地的地理位置得天独厚，可以记录中新世晚期水文变化，这些变化影响了欧亚大陆中部巨型湖泊 Paratethys 的沉积环境和动物群散布模式。潘农湖和当地喀尔巴阡河流的高锶同位素比 ( ⁸⁷ Sr/ ⁸⁶ Sr)与东帕特提斯 (黑海 - 里海)低⁸⁷ Sr/ ⁸⁶ Sr之间的差异允许对连通性和水进行彻底调查瞬态达契亚盆地的通量。我们提供了详细的⁸⁷ Sr/ ⁸⁶达契亚盆地的 Sr 记录，提供了从最新的托托阶（约 7.7 Ma）到早更新世（约 1.8 Ma）的盆地连通性的特殊记录。数据显示，托尔顿晚期海侵（7.6-7.4 Ma）始于东帕拉提斯水域侵入达契亚盆地，此后当地河流成为早期墨西拿主要淡水环境的主要来源。区域 Maeotian-Pontian 过渡区间 (6.3-5.9 Ma) 记录了东部 Paratethys 水域的第二次入侵，但这一次有额外的海洋（地中海）涌入，同时发生了短暂的盐度入侵。在地中海的墨西拿盐度危机期间，达契亚盆地逐渐与东帕拉提提斯（5.9-5.5 Ma）相连，之后，它在地中海低位（5.5 Ma）高峰期受到限制，并充满潘农湖和当地河水（5.5-5.3 Ma）。在上新世期间，达契亚盆地与当时孤立的黑海重新连接，显示出类似的情况⁸⁷ Sr/ ⁸⁶ Sr 如末次冰期最大值。