Preliminary study on the relationship between the crust-mantle structure and the formation of Laowangzhai superlarge gold deposit

The essential shallow-crust structural factors controlling the formation of Laowangzhai gold deposit include favorable tectonic and regional structura l site, the release site of a great deal of the earth energy, favorable ore -controlling structure system, abundant and favorable source rocks for gold , ductile shearing, abundant minerogenetic materials source in extensive cr ust and mantle. And the essential deep-seated crust-mantle structure factor s dominating the formation of the ore deposit include intracrustal low-velo city len, high-velocity bodies in the lower part of middle crust and lower crust, the steps on the slope of Moho, connecting site of mantle rises, the crust-mantle transition layer, upwelling of asthenosphere and the low-velo city plume. It is concluded that the fundamental reason that controls the f ormation of Laowangzhai superlarge gold deposit lies in the coupling betwee n deep and shallow crust-mantle structure factors controlling the formation of the deposit and their coupling with the lithospheric evolution and geol ogical event.