Rheology and Metallogeny of the Maya-Selemdzha Plume

摘要

Plumes (mantle jets) and associated hot mantle fields are widespread in tectonic shells of the Earth [4-6, 10, 14], eastern Asia and the adjacent marginal seas included [7, 9, 13]. In most cases, only lithospheric and, less commonly, asthenospheric parts of plumes (plume heads), which are characterized by peculiar geophysical features such as anomalous heat flow, lower velocities of seismic waves, and low electric resistivity in the lower crust, subcrustal and asthenospheric layers of the upper mantle, or uplifting or diffusion of the base of the crust and lithosphere [4, 7, 13, 14], are accessible for geological, geophysical, and geochemi-cal observations. Inasmuch as initiation and evolution of plumes are closely connected with collision and subduction of the lithospheric plates [9, 10], mantle convection [5, 6], and superposed rifting [4, 6, 9, 13, 14], diagnostics, spatial parametrization, and metallo-genic analysis of the concealed (frequently disturbed or overlain) deep central-type structures of the plume nature represent a very complex problem.