Fluids play an important role in seismic faulting both at hypocentral depths during earthquake nucleation and at shallower crustal levels during rupture propagation. Pre- to co-seismic anomalies of crustal fluid circulation have been identified by hydrogeochemical and seismological monitoring and interpreted as potential precursors of strong earthquakes. To shed light on the role of fluids in seismic and precursory mechanisms, the active carbonate-hosted principal slip zone (7-8 cm thick) of the exhumed (exhumation < 3 km) normal Mt. Morrone Fault (central Apennines) has been investigated with a multi-disciplinary approach from the macro- to the nano-scale. The distal slip zone consists of white cementitious calcite-rich bands and red cataclastic bands composed of dolomite and calcite clasts embedded in a clay-rich matrix. The proximal slip zone consists of subparallel ultracataclastic layers separated by sharp slip surfaces. The ultracataclastic layers mutually inject/overprint, bearing evidence of granular fluidization, dolomite thermal decomposition, and clay amorphization. Fluid inclusions and the distribution of both trace and major elements reveal the inflow of both shallow and deep external fluids into the slip zone. Presumably, the deep fluids originated from a magmatic-like source and ascended along the fault during pre-seismic dilation and seismic ruptures, interacting with shallow phyllosilicate-rich flysch deposits and the fluids hosted within them. In this context, vanadium-rich fluidized microlayers along the exhumed Mt. Morrone Fault are reminiscent of vanadium-rich potential hydrogeochemical precursors arose in the shallow aquifers of the study area since a few months before the 2016 M_w 6.0 Amatrice earthquake.

流体在地震成核过程中的震源深度和破裂传播过程中的较浅地壳水平的地震断层中起着重要作用。地壳流体循环的地震前到同震异常已被水文地球化学和地震学监测确定，并被解释为强地震的潜在前兆。为了阐明流体在地震和前兆机制中的作用，挖掘（挖掘 <3 公里）正常 Mt. 的活跃碳酸盐岩主滑移带（7-8 厘米厚）。莫罗内断层（亚平宁山脉中部）已经通过从宏观到纳米尺度的多学科方法进行了调查。远端滑移带由富含白色胶结方解石的带和由嵌入富含粘土基质中的白云石和方解石碎屑组成的红色碎屑带组成。近端滑移区由被尖锐滑移面隔开的次平行超碎裂层组成。超碎裂层相互注入/叠加，带有颗粒流化、白云石热分解和粘土非晶化的证据。流体包裹体和微量元素和主要元素的分布揭示了浅层和深层外部流体流入滑移带。据推测，深部流体起源于类似岩浆的源头，并在震前扩张和地震破裂期间沿着断层上升，与浅层富含页硅酸盐的复理石矿床和其中的流体相互作用。在这种情况下，沿着挖掘出的 Mt. 形成了富含钒的流化微层。_w 6.0 Amatrice 地震。