THE EMPLACEMENT MECHANISM AND CONTINENTAL DYNAMICS EVOLUTION OF INDOSINIAN INTRUSIVE ROCKS IN EAST LIAONING PENINSULA

The Indosinian intrusive rocks are broadly distributed in East Liaoning Peninsula. Based on the study on the geology, petrochemistry and geochemistry of the intrusive rocks, it is concluded that the evolution of the source magma is in the trend of uhrabasie→basic→intermediate→acid→alkaline. The source types of the magma are mantle source,crust-mantle mixture and crust source. The continental dynamic evolution process of magma involves three periods under three emplacement mechanism patterns, that is, the sheeted emplacement in the extensional mechanism from the initial to early period of orogeny, the doming and piercing emplacement in the main period of orogeny, and the passive emplacement of tectonic collapse in post-orogeny period.