粤西福湖岭混合岩-花岗岩剖面的发现及其意义

摘要

The outcrop at Fuhuling, located by the seashore of Yangxi county, Guangdong province, is distinctly zoned. The rock type changes gradually from mica-quartz-schist, mottling/striping-migmatite, banding-migmatite and magmatic granite (or dirty granite) from the top to the bottom. The rocks in different zone show distinct deformation characteristics, which supplies plausible site for the researches of crustal melting, granite formation and continental rheology. Zircon U-Pb dating indicates that the rocks were formed at 415–445 Ma, i.e., Caledonian stage.%作者野外调查发现的广东阳西福湖岭剖面，自上而下呈云母石英片岩→斑点状和条纹状混合岩→条带状混合岩→混合花岗岩(或“脏花岗岩”)的连续分带，且不同类型岩石具有不同变形特征，为研究壳内熔融和花岗岩浆形成及大陆流变等提供了不可多得的自然实例。初步测年结果表明，混合岩和花岗岩均形成于415~445 Ma 之间，为加里东期的产物。