Two mica schists are considered to be the source bed and host rock of gold.
二云母片岩不仅是矿源层，而且还是赋矿围岩。
Their basement is composed of Archean to early Proterozoic gneisses and crystalline schists metamorphosed at granulite and amphibolite facies.
它们的基底由太古代至元古代早期的粒相和闪石相变质的片麻岩和结晶片岩组成。
The low-temperature eclogites from the subduction-accretionary complex in the North Qilian Mountain occur as lenses within blueschists and phengite-schists.
北祁连俯冲-增生杂岩带中的低温榴辉岩以透镜体形式产于蓝片岩和多硅白云母片岩中。
Millions of years ago , metamorphic schists , gneisses and quartzites formed impressive , flat - topped inselbergs on a vast plain in the shadow of kilimanjaro.
百万年前，变质的石板片麻岩和石英岩，在乞力马札罗山附近广阔的平原形成壮观岛屿似的。
The upper crust is mainly composed of slates, phyllites, schists, granulite of greenschist facies (partly low-amphibolite facies) and granite intrusions, and sedimentary rocks at the top.
上地壳主要为绿片岩相(部分低角闪岩相)的板岩、千枚岩、片岩、变粒岩以及花岗岩组成，顶部为沉积盖层。
The upper crust is mainly composed of slates, phyllites, schists, granulite of greenschist facies (partly low-amphibolite facies) and granite intrusions, and sedimentary rocks at the top.
上地壳主要为绿片岩相(部分低角闪岩相)的板岩、千枚岩、片岩、变粒岩以及花岗岩组成，顶部为沉积盖层。
应用推荐