关键词: 砂岩, 分类, 新方案, 图

Abstract: On the basis of studying foreign and domestic sandstone classification , this paper suggests a new , suitable sandstone classification. Firstly , according to the matrix content , sandstone is divided into two categories : the sandstone with matrix < 15 % is anenite ; matrix > 15 % is wacke. Three end members on the classification triangle chart are quart (Q) , feldspar
(F) and rock debris (R) . Sandstone is divided into three classes. The andstone that has Q > 75 % is quart sandstone , which is Q < 75 % and F > R is feldspathic sandstone , which has Q< 75 % and R > F is lithic sandstone. Quart sandstone is divided into four types : pure quartzose < sandstone , quartzose sandstone , feldspar quartzite , and lithic quartzite. Feldspathic sandstone is divided into three types : arkoses , lithic arkoses , subarkose. Lithic sandstone is divided into three types : litharenite ,feldspar litharenite , sublitharenite.

Key words: sandstone, classification, new proposal, chart