沂沭河的发育演变与金刚石砂矿的分布特征

A Discussion on the Evolution of Yishu River and the Concentration Conditions of Placer Diamond

本文扼要阐明控制沂沭河发育的地质地貌条件,中下游地区的河谷地貌与沉积物特征,河流发育简史及下游河道变迁,探讨了沂沭河流域金刚石砂矿的分布特征与富集条件。

This paper expounds briefly the geological and geomorphic condi(?)ions of evolution in Yishu River, the valley geomorphic and depositional characteristics in the middle and lower reaches, the evolution sequence, and the shifting of valley in the lower reaches. Then the writer studies the distribution and concentration conditions of placer diamond in this area.