Neotectonics, remote sensing and erosion cut of ore-controlling structures of the Mnogovershinnoe gold-silver deposit (Khabarovsk Krai, Russian Far East)

摘要

The Mnogovershinnoe epithermal gold-silver deposit is located on the northern part of the East Sikhote-Alin magmatic belt of Northeast Russia. This deposit is related to the intrusion of a large multiphase Paleogene Bekchiul granitoid pluton. The research area underwent several episodes of intrusion magmatism, volcanism and isostatic uplifting because of its location at the junction point of large tectonic structures of Asia. The integration of in situ observations, geological mapping data, analysis of the Landsat 8 images and digital elevation data provides insights into the Meso-Cenozoic evolution of the Bekchiul magmatic center. Events in the Neogene-Quaternary were sufficiently restored by detecting areas with anomalous differences from the base level surfaces for the second- and third-order streams and numerical modeling. The anomalous values of the base levels difference far exceed the amplitude of sea level regression during the Neo-Pleistocene. The proposed methodological approach considered isostatic uplifting and sustaining activity as guiding factors in the development of the Bekchiul volcano-plutonic center.