摘要
北江下游业经鉴定的重矿物共有27种(类)。其中主要组分的稳定矿物在全河段中基本一致,含量变化不大,构成了重矿物的基本组合。从上段到下段,它们在特定动力条件作用下,按比重及形态分异的结果,形成了各具特色的、分别反映出不同的沉积环境和动力特征的4个重矿物组合类型。
There are twenty seven kinds of heavy minerals identified in the low reaches of the Beijiang River. The main proportion of stable heavy minerals which constitute fundamental combinations can not show the significant vareations along the river. Ranging from up to down, four heavy-mineral combinations have been formed under certain hydrodynamic conditions and separated by specific gravity and shape, each of which reflects different sedimentation environments and hydrodynamic characteritics.
出处
《热带地理》
北大核心
1989年第4期314-321,共8页
Tropical Geography
关键词
北江
现代沉积
重矿物
动力环境
The lower reaches of the Beijiang River
Heavy-mineral characteristics
Sedimentation
Hydraulic environment
