摘要
雅江三叠纪复理石盆地是巴颜喀拉海盆的重要组成部分 ,晚三叠世沉积了厚度巨大的复理石地层 ,其中砂岩属特征夹层。根据 1∶2 5万区域地质调查资料和剖面研究 ,在详细观察描述砂岩宏观特征的基础上 ,通过薄片鉴定等方法 ,详细研究了其物质成分及结构特征 ,指出其成分成熟度为中等至较高 ,结构成熟度较低 ,探讨了砂岩的物质来源。
Yajiang Flysch Basin in the Late Triassic was an important part of the Bayan Har Sea Basin.Flysch deposit intercalated with characteristic sandstone in the Late Triassic flysch basin was tremendous in thichness.A study during 1∶250,000 regional geological surveying indicates that the sandstoneis characterized by medium composition maturity and lower texture maturity.Material sources for the sandstone are discussed.
出处
《四川地质学报》
2004年第2期65-69,共5页
Acta Geologica Sichuan
关键词
晚三叠世
砂岩
物质来源
复理石盆地
flysch basin
Late Triassic
characteristics of sandstone
material source
Yajiang
