The Origin of the Mesozoic Associated Multiseries Granitoid Magma in the Shandong Peninsula

Three melting events of the earth's crust occurred during the period of 220-120 Ma in the Shandong Pe-ninsula. Three subcycles of granitoid magma including six rock series were generated in the faulted granitoidmagma belt. The parent magma of several rock series formed earliest originated from the lower crust ofgranulite facies; following the increase of geothermal temperature the source magma would migrate into themiddle crust of amphibolite facies. In the diapiric granitoid magma belt, the granitoid magma was formed firstin granitic layer of the upper crust, and then in the middle crust. In each subcycle the generation of magmastarted with the generation of more mafic one and finished with low eutectic one; they were formed in the formof layered melting in a particular position of the crust.

The Origin of the Mesozoic Associated Multiseries Granitoid Magma in the Shandong Peninsula

Abstract Three melting events of the eartr's crust occurred during the period of 220-120 Ma in the Shandong Peninsula. Three subcycles of granitoid magma including six rock series were generated in the faulted granitoid magma belt. The parent magma of several rock series formed earliest originated from the lower crust of granulite facies; following the increase of geothermal temperature the source magma would migrate into the middle crust of amphibolite facies! In the diapiric granitoid magma belt, the granitoid magma was formed first in granitic layer of the upper crust, and then in the middle crust. In each subcycle the generation of magma started with the generation of more mafic one and finished with low eutectic one; they were formed in the form of layered melting in a particular position of the crust.