大理北衙富碱斑岩侵入体的钾长石研究

Study on K-Feldspar of Baiya Alkali-Rich Prophyry in Dali District of Yunnan Province

探讨了北衙富碱斑岩侵入体之钾长石特征。其产出状态、结构状态、化学成分、形成温度等的研究表明，该钾长石具富Ｏｒ之特点，其成分、结构等的变化在一定程度上反映了岩浆的演化特征，是岩浆演化的示踪矿物之一，可能是该区裂谷型碱性花岗岩的特征之一。

This paper deals with the characteristics of kfeldspar in Baiya alkali一rich porphyry.The studyon its occurrence state,texture state,chemical compositions,forming temperatures etc。shows that thek-feldspar has higher or.The changes of its compositions,textures elc。can reflect magnatic evolution to①P.10some extent.It is one of the trace minerals of magnatic evolution, and may be one of the characters of therift-type alkali granitic rocks in this belt.