角斑岩

这些火山岩所含的次生矿物群大致符合细碧岩或角斑岩之定义。

The mineral parageneses of the volcanic rocks are generally consistent with that of spilite or keratophyre .

主要由细碧岩、角斑岩及火山碎屑岩组成，其中有硅质岩、灰岩及碎屑岩夹层或凸镜体。

It mainly consists of spilite , keratophyre and volcanic clastics , intercalated with siliceous rocks , limestone and clastic rocks or lens .

该火山岩系底部超镁铁岩的REE分布模式为轻稀土富集型，有小的Eu正异常；细碧岩-石英角斑岩也是轻稀土强富集型，Ce和Eu有轻微的正异常；

REE patterns of spilites , keratophyres and ultramafic rocks under the volcanic rocks show strong enrichment in LREE with unobvious Ce and Eu positive anomalies .

对细碧-石英角斑岩系种属划分和命名的建议

Suggestion on the classification of spilite keratophyre and their nomenclature

白银地区细碧石英角斑岩地球化学特征&兼谈白银板块构造环境

The Geochemical Features of Spilite-keratophyre in Baiyin Area and the Plate Tectonic Setting

细碧&角斑岩系一般分为细碧岩、斑岩和石英角斑岩三类。

Spilite-keratophyre sequence is generally divided into spilite , keratophyre and quartz keratophyre .

并证实其原岩是与本区未变质的火山岩类相同的一套细碧-石英角斑岩系。

We con-firm that the original rocks are identical with the volcanic rocks in this area .

伴随有各类矿化角砾岩的斑岩矿床是深成源岩在浅成-超浅成条件下侵位-矿化的产物。

Porphyry deposits associated with various mineralized breccias result from the emplacement and mineralization of the hypogene magma under the hyper-gene-upperhypergene conditions .

今后应注意在隐爆角砾岩中、斑岩中、岩体接触带附近和岩体外接触带白云岩和灰岩中寻找不同类型的金矿床（体）

They occur generally at the inner and outer contact zones and are controlled by ring explosion breccia , porphyry and contact zone and dolomite and limestone out of the contact zone .