摘要
根据接触关系和岩石学特征将月山复式岩体划分为两个阶段侵入岩,即第一阶段的石英闪长岩,第二阶段的闪长岩。锆石U-Pb年代学研究表明,安庆地区中生代至少发生过两期岩浆作用,第一期在139Ma,主要形成石英闪长岩,第二期在123 Ma,主要形成闪长岩。岩石地球化学特征表明月山闪长岩体是由壳幔混源岩浆结晶分异作用形成。
According to the contact relationship and petrological characteristics, Yueshan com- plex in Anhui Province can be divided into two stages of intrusions,the stage I formed quartz dio- rite and the stage II formed diorite. The SHRIMP zircon U-Pb dating results support occurrence of at least two periods of magmatism in the Mesozoic,the first is at -139 Ma and the second at -123 Ma,which are responsible for the formation of quartz diorite and diorite respectively. Geochemical characteristics indicate that the magmas of Yueshan diorite is derived from mixing source of mantle with crust crystallization.
出处
《矿物岩石》
CAS
CSCD
北大核心
2012年第1期61-66,共6页
Mineralogy and Petrology
基金
全国危机矿山接替资源找矿科研项目(20089938)
中央高校基本科研业务费专项资金(2011YYL013)
