Observation Site of Enclaves in Granodiorite
The Mesozoic (250 - 65 million years ago) is a key period of the tectonic evolution and intracontinental orogeny process in southeastern China. Because of the intense collision between Pacific Plate and Eurasian Plate 140 million years ago, magma here were produce separately in the upper mantle and the deep crust. Then they were mixed, upwelled and cooled down to form granodiorite and syenogranite. Many dark enclaves can be observed in granodiorite and are of microgranular igneous texture and oval or drop-shaped. The contact boundary between enclaves and the granodiorite is very clear.These enclaves contain relics of magma genesis, evolution and process, so they have been paid too much attention for studying crust-mantle interaction.
Dynamical Process of Magma Mingling
Magma Mingling: Evidence of Enclaves
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