摘要
分布在剑川县城西侧的一系列碱性浅成斑岩-深成岩体,不是彼此孤立而是一个具有成因联系的杂岩体.该杂岩体可分为四次岩浆侵入,其中第Ⅱ次剑川粗面斑岩并不是过去认为的粗面岩,而是一个超浅成侵入体,从中心到边部可分为两个岩相带,岩石以碱性系列为主,岩浆是深熔作用形成的.
Based on study of petrography, the series of hypabyssal porphyry bodies located on west Jianchuan County,Yunnan Province, is considered as the same complex, instead of isolated parts. Four times of magmatism can be distingushed in this complex. Trachytic porphry formed in second time is a ultra-hypabyssal body, instead of trachvte as before. Two lithofacies can be divided from center to side. The rocks mainly belong to alkalic series. Magma is produced by higher degree melting.
出处
《火山地质与矿产》
1992年第2期59-69,共11页
Volcanology & Mineral Resources
关键词
粗面斑岩
正长岩
岩石学
云南
Trachyte porphyry, Syenite, Petrography, Jianchuan.
