Abstract Lacustrine strata record long-term variations in climatic and tectonic perturbations during orogen evolution. Here we use the sedimentological record of the early to middle Miocene intramontane lacustrine Pranjani Basin (Serbia) to study tectonic and climatic variations during the evolution of the Dinaridic orogen. Our study focuses on a Mg-clay-bearing succession that belongs to the second depositional cycle. A detailed sedimentological, mineralogical and geochemical study shows that the investigated Mg-clays bearing succession consists of an alternation of smectite- (± analcime or sepiolite), dolomite-sepiolite and sepiolite layers. We interpret this high-order cyclicity to have been driven by variable water availability, i.e. by the interplay between runoff, groundwater influx and evaporation. Furthermore, we relate these pulses in water variability to wet and dry intervals under semi-arid to arid climatic conditions. Dry intervals produced a negative water balance promoting the deposition of sepiolite - and dolomite - dominated facies. Wet intervals and a positive water balance inhibited much of the terrestrial input and thus favoured the deposition of smectite - dominated facies. Our new data combined with a review of previous studies reveal longer-term basin-wide lake level and chemistry fluctuations, which we relate to closed and open lake phases. We suggest that these phases can be explained by alternating humid and arid phases superimposed on tectonically induced uplift and subsidence. The arid phases led to lake shrinking and deposition of an evaporite-bearing succession. During the intervening humid phase, the lake expanded. In contrast to the lakes formed in the external part of the Dinarides, the lakes that existed in its internal part contain evaporite-bearing successions, indicating that this arid phase was regionally extensive and possibly orographically controlled.

中文翻译：

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早中新世中第纳尔内部的干旱阶段：来自 Pranjani 盆地（塞尔维亚）镁粘土的推论

摘要 湖泊地层记录了造山带演化过程中气候和构造扰动的长期变化。在这里，我们使用早中新世山内湖盆（塞尔维亚）的沉积学记录来研究第纳尔迪克造山带演化过程中的构造和气候变化。我们的研究重点是属于第二沉积旋回的含镁粘土层序。详细的沉积学、矿物学和地球化学研究表明，所研究的含镁粘土层序由蒙脱石（±方沸石或海泡石）、白云石-海泡石和海泡石层的交替组成。我们将这种高阶循环解释为由可变的可用水量驱动，即径流、地下水流入和蒸发之间的相互作用。此外，我们将这些水变化的脉冲与半干旱到干旱气候条件下的干湿间隔联系起来。干燥层段产生了负水平衡，促进了海泡石和白云岩为主的相的沉积。潮湿间隔和正水平衡抑制了大部分陆地输入，因此有利于蒙脱石主导相的沉积。我们的新数据结合对先前研究的回顾揭示了长期的全盆地湖泊水位和化学波动，我们将其与封闭和开放的湖泊相联系起来。我们认为，这些阶段可以通过叠加在构造诱发的隆起和沉降上的交替潮湿和干旱阶段来解释。干旱阶段导致湖泊收缩和含蒸发岩层序的沉积。在中间的潮湿阶段，湖泊扩大了。