一个与超基性岩有关的矽卡岩铁矿

• 作 者: 解广轟
• 出 处: 地质科学
• 发表日期: 1965年03期
• 关键词: 超基性岩 矽卡岩 接触交代 围岩 侵入深度 磁铁矿 接触变质 金云母 产状 接触带

超基性岩同围岩接触,一般都很少见到明显的接触变质和接触交代现象,特別是后者更为少见。造成这一情况的原因可能有二:首先,超基性岩浆本身“活动组分”较少,如果沒有特殊有利的条件(包括岩体大小、侵入深度、接触面的形状产状、围岩成分以及构造条件等),这些组分不易集中,也就很难同围岩产生接触交代反应。

Ultramafic rocks contact with the surrounding rock, generally rarely seen obvious contact metamorphism and contact with the phenomenon, especially the latter is even more rare. The reason for this may be due to two reasons. Firstly, ultramafic magma itself has fewer “active components”. If there are no special and favorable conditions (including the size of rock mass, the depth of invasion, the shape and shape of the contact surface, And structural conditions, etc.), these components are not easy to concentrate, it is difficult to produce contact with the surrounding rock reaction.