胶南地区伟德山超单元中闪长质包体的特征及岩浆成因

Characteristics of Dioritic Inclusions in Weideshan Superunit and Its Magma Origin in Jiaonan Area

摘要:

胶南地区伟德山超单元中有较多的微粒闪长质包体 ,对其结构、化学成分、稀土配分模式、同位素地质年龄等特征进行分析研究 ,并与寄主岩石进行对比 ,认为闪长质包体为液态不混溶成因 ,与寄主岩石准同时形成或包体形成略早 ;伟德山超单元由幔源基性岩浆和下地壳部分熔融的酸性岩浆经岩浆混合作用形成

Abstract:

Lots of micrograined dioritic inclusions exist in Weideshan superunit in Jiaonan area of Shandong province. According to their characteristic studies (including structure, chemical compositions, rare-earth distribution model and isotope age), and compared with their host rocks, it is regarded that inclusions may possesses a genesis of solution-immiscibility, and they formed a little earlier than the host rock. Weideshan superunit formed from magmatization of mantle partial melting basic magma and the acid m...