摘要
柴家庄、八卦山和天子山花岗岩体空间上紧密共生,岩性均为二长花岗岩,岩石具富硅、过铝、贫钙的地球化学特征,属钙碱性系列。3个岩体的大离子亲石元素蛛网图和稀土元素配分曲线相关性均较好。3个岩体受印支晚期断裂构造控制,成岩时代相近,是同源岩浆演化不同期次的产物,应统称为柴家庄—八卦山—天子山岩浆带。
Chaijiazhang, Tianzishan and Baguashan granites closely accrete in space. They are all adamellites. The geochemical character is rich SiO2 ,over- saturated Al2O3 and poor CaO. They all belong to calc - alkalic series. Trace elements distribution and REE distribution patterns all show good pertinency. These three granites were controlled by Indosinian fault structure and were results of the same magma＇ s crystallization and evolution in different stages. They also have similar intrusion ages, so they should be named together as Chaijiazhuang - Baguashan- Tianzishan magma belt.
出处
《甘肃地质》
2006年第1期42-46,共5页
Gansu Geology
基金
中国地质调查局地质调查项目(编号:20001300010171)
