The Northern Calcareous Alps are part of the Eastern Alps in Austria and Germany. The Mesozoic units of this fold-and-thrust belt were detached, thrusted and stacked along the evaporitic Haselgebirge Formation. Exposed in salt mines, rocksalt and mudrock form a two component tectonite: The rock type “haselgebirge” consists of 10–70 wt % halite with silt- to gravel- or block-sized components within a halite matrix, and the “kerngebirge” with >70 wt % halite. All rock types studied are fault rocks. By use of a temperature-independent subgrain size piezometer, the paleo-differential stress of halite was calculated at ca. 2.5 MPa in Altaussee and ca. 4.5 MPa in Berchtesgaden. Including data from a grain-size piezometer, temperatures were estimated at ca. 150 ± 20 °C and 110 ± 10 °C. This implies very high strain rates, which are about 10−10–10−9 s−1. During the tectonic movement, the halite deformed, recrystallized, and crystallized as veins in mudrock fractures. We interpret high overpressure of the pore fluid to have significantly contributed to fracturing of the mudrock.

中文翻译：

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岩盐-泥岩-构造岩的结构与演化：北钙质阿尔卑斯山的哈斯山

北钙质阿尔卑斯山是奥地利和德国东部阿尔卑斯山的一部分。这条褶皱冲断带的中生代单元沿着蒸发的 Haselgebirge 地层分离、逆冲和堆积。暴露在盐矿中，岩盐和泥岩形成两种成分的构造岩：岩石类型“haselgebirge”由 10-70 wt% 的岩盐和岩盐基质中的粉砂到砾石或块状成分组成，“kerngebirge”与>70 wt% 的岩盐。研究的所有岩石类型都是断层岩。通过使用与温度无关的亚晶粒尺寸渗压计，岩盐的古压差计算约为 Altaussee 和约 2.5 MPa 贝希特斯加登 4.5 兆帕。包括来自晶粒尺寸渗压计的数据，温度估计为约。150 ± 20 °C 和 110 ± 10 °C。这意味着非常高的应变率，大约是 10-10-10-9 s-1。在构造运动过程中，岩盐发生变形、重结晶、结晶为泥岩裂缝中的脉。我们将孔隙流体的高超压解释为对泥岩的压裂有显着贡献。