The parent magma of several rock series formed earliest originated from the lower crust of granulite facies;
最初形成的岩系的母岩浆，起源于麻粒岩相的下地壳。
The petrographical facies studies indicate that the magma-crystallined epidotes , bornblendesand biotites were distributed in TTG rocks.
详细的岩相学研究表明，TTG岩类中存在岩浆结晶的绿帘石、角闪石和黑云母等。
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