The study of fluid inclusions in Lower Triassic Röt halite from the Rockensussra 2/83 borehole in northern Germany showed the presence of primary and secondary gas-liquid inclusions. The gas phase in inclusions indicates their stretching due to salt overheating at some postsedimentary stage. The homogenization temperature of inclusions indicates the overheating temperature of about 60–70°C. The overheating is additionally indicated by trails of migration of large secondary inclusions occurring inside chevrons. The major-ion (K, Mg and SO4) composition of inclusion brines was established with the use of ultramicrochemical analysis (UMCA). The results of chemical analyses of brines of primary inclusions in halite from the Rockensussra 2/83 borehole confirm the earlier results for the Röt halite from the Netherlands and Poland. The bromine content in halite is 78–107 ppm, supporting thus marine origin of halite. Brines of primary gas-liquid inclusions are thus representative samples of trapped evaporite water and they may be used for the reconstruction of the composition of Early Triassic seawater. The comparison of our analytical data with the earlier published data and models of chemical composition of seawater during the Phanerozoic which were constructed with the use of the HMW computer program makes it possible to conclude that the Early Triassic seawater was of the SO4-rich type and considering the ratios of major ions it fully corresponded to the Early Permian (Asselian-Sakmarian) seawater. It differed from the present seawater by a slight decrease of Na and Mg ions, a considerable decrease of SO4 ion (by 31%) and an increase of Ca ion (by 36%).

中文翻译：

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德国中部 Röt（下三叠统）盐矿床岩盐中的流体包裹体：海水化学证据以及盐沉积和再结晶条件

对德国北部 Rockensussra 2/83 钻孔下三叠统 Röt 岩盐中流体包裹体的研究表明，存在原生和次生气液包裹体。包裹体中的气相表明它们在某些沉积后阶段由于盐分过热而拉伸。夹杂物的均质化温度表明过热温度约为 60-70°C。人字形内部出现的大型次生夹杂物的迁移轨迹也表明过热。使用超微化学分析 (UMCA) 确定了包裹体盐水的主要离子（K、Mg 和 SO4）组成。Rockensussra 2/83 钻孔岩盐中主要包裹体卤水的化学分析结果证实了荷兰和波兰 Röt 岩盐的早期结果。岩盐中的溴含量为 78-107 ppm，因此支持岩盐的海洋来源。因此，原始气液包裹体的卤水是圈闭蒸发岩水的代表性样本，可用于重建早三叠世海水的成分。将我们的分析数据与使用 HMW 计算机程序构建的显生宙早期公布的海水化学成分数据和模型进行比较，可以得出结论：早三叠世海水属于富含 SO4 的类型和考虑到主要离子的比例，它完全对应于早二叠世（Asselian-Sakmarian）海水。它与现在的海水不同，Na 和 Mg 离子略有减少，SO4 离子显着减少（减少 31%），Ca 离子增加（增加 36%）。