活动边缘 meaning in English
active margin
Examples
- The lower paleozoic strata in the south kunlun massif are kulafuhe group of cambbrian - ordovician . they consists of metamorphic detrital rocks , limestone , magnetite - bearing basalt , quartzite ( meta - silicalite ) , which suggests that they might form at active continent margin . the geochemical characteristics of volcanic and detrital rocks do indicate that they might form at an active marginal environment such as island arc etc . associated with the qimanyuter ophiolite suit , there are lots of early paleozoic granitic plutons
在昆南地块上的早古生代地层为寒武?奥陶系库拉甫河岩群，由变碎屑岩、灰岩、含磁铁矿玄武岩、石英岩(变硅质岩)等组成，显示其比昆北地块有较大的活动性，火山岩和碎屑岩的岩石地球化学特征也反映为岛弧及活动边缘环境。