摘要
郯城金刚石砂矿属冲积层产状被破坏的阶地砂矿，金刚石产在残余二阶地冲积砂砾层中，金刚石颗粒大，宝石级金刚石较多，是宝石工业的重要原料基地。
The diamond placer in Tancheng county,Shandong province is of a terraced placer from the destroyed occurence of alluvium. In this placer,the grain size of the diamonds which occurs in a alluvial grit gravel of residual two-tarraces are large and more gem diamonds can be selected out. Therefore,this diamond placer can be considered as an important base for gem industry.
出处
《山东建材学院学报》
1994年第2期72-75,共4页
Journal of Shandong Institute of Building Materials
关键词
金刚石
砂矿
地质特征
地貌特征
diamond
terracd placer
alluvial grit gravel
geolgical character
geographical character
