Structural Conditions of the Bedrock Noble Metal Mineralization in the Kherpuchi–Vayun Gold Placer District (Khabarovsk Region)

A structural and geodynamic study revealed that folding and faulting within the Kherpuchi–Vayun gold placer district are in a structural paragenetic relationship formed under the local W–E-oriented stress caused by the dynamic interaction of the N–S-oriented Limurchan and V’yun faults. The sinistral activation of these faults was induced by the regional NW-directed stress field. The analysis of fault tectonics at the prospective sites of bedrock noble metal mineralization showed that it is mainly found in the W–E-trending tension gashes subparallel to the local stress. These S-shaped tension gashes are arranged in en echelon structures, which are controlled by the conjugate set of NE-trending dextral and NW-trending sinistral faults.