Abstract

New data on the geological structure and ore-bearing structural parageneses of the Uryakh gold ore field are presented. The formation of the deposit occurred in dynamic shear regime along ore-controlling deep-seated faults of the Syulban fault system and faults of the system transverse to it. The interaction of two duplex shear systems resulted in the block structure of the ore field. Tectonophysical methods have established the individual development of tectonic blocks during the period of gold-bearing fluid input in a seismically active regime. The specific features of the formation of ore-bearing fracture–fault structural parageneses in the blocks resulted from the change in the seismic regime under the action of pressure and gas-saturated fluids. The parameters of the fluid system were determined by fluid inclusion studies in quartz. An unstable variable compression–extension regime of the early phase of seismic activity led to the formation of hybrid structural parageneses under the influence of stresses of damping shear and injective hydrodynamic stress. Variations in the stress–strain state of the medium in this phase correspond to a transient seismic regime and are consistent with variations in the thermobarometric parameters of the fluid system. In the late phase of seismic activity, a stable uniaxial tension regime with a superlithostatic fluid pressure occurred, which caused brittle deformations independent of slip along the fault. The centroid mechanism of such deformations, which is rarely found in the dynamic regimes of hydrothermal deposits, ensured the formation of structural parageneses unusual for shear zones, which resulted in a different combination of structural and morphological types of orebodies in the blocks.

中文翻译：

---

乌里阿赫金矿田流体动力学结构共生的发震性质（东北贝贝卡利亚）

摘要

介绍了有关乌里亚克金矿田的地质结构和含矿结构同生物的新数据。沉积物的形成发生在动态剪切状态下，沿着Syulban断层系统的控矿深部断层及其横向断层。两个双重剪切系统的相互作用导致了矿场的块状结构。构造物理方法已经确定了在地震活动区含金流体输入期间构造块​​体的个体发育。块体内含矿断裂-断层构造共生物形成的特定特征是由于在压力和气体饱和流体的作用下地震状态的变化所致。通过石英中的流体包裹体研究确定了流体系统的参数。地震活动早期的不稳定的可变压缩-扩展状态导致阻尼剪应力和注入水动力应力的影响下混合结构亚种的形成。在此阶段，介质的应力-应变状态的变化对应于瞬态地震状态，并且与流体系统的热压参数变化一致。在地震活动的后期，出现了具有超静液压的稳定单轴张力状态，这导致了脆性变形，而与沿断层的滑动无关。这种变形的质心机制（在热液沉积的动态机制中很少发现）确保了剪切带不常见的结构共生体的形成，