摘要
铜石杂岩体是燕山早期侵入的中偏碱性浅成—超浅成杂岩，主要由闪长对岩、正长斑岩及隐爆角砾岩所组成。岩浆活动具由中性向中偏碱性演化的趋势。岩相学及岩石化学研究表明，岩浆演化机制是矿物分离结晶作用。该杂岩体中的正长斑岩类岩石可能是金的矿源。
The Tongsbi igneous complcx is an intermediate subalkaline hypabyssal一ultrahypabyssal one emplaced in the early stage of the Yanshan movement(17 4Ma ).The complex consists of diorite porphyrite,syenite porphyry and crypt seruption breccia.The complex exhibits a magmatic evolutionary trend from intermediate to suba tkaline. The petrologic and petrochemical study has shown that the main mechanism controlling the magmatic evolution is fractional crystallization of minerals. The syenite porphyry in the complex may be the source of gold.
出处
《山东地质》
1994年第1期24-31,共8页
Geology of Shandong
