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Characteristics and provenance analysis of the Mesozoic and Cenozoic sandstone in the foreland basin of the south part of Longmenshan Mountain
Author(s): PENG Jun, Chen Hong-de, ZENG Yun-fu
Pages: 77-
84
Year: 2000
Issue:
1
Journal: REGIONAL GEOLOGY OF CHINA
Keyword: 龙门山; 前陆盆地; 中-新生代; 砂岩特征; 物源分析; 沉积模式;
Abstract: 龙门山南段前陆盆地发育了巨厚的陆源沉积岩,其中砂岩分布最广、含量最多.在详细观察描述砂岩宏观特征的基础上,通过薄片鉴定、粒度分析等方法,研究了中-新生代砂岩的物质成分及结构特征,指出砂岩的成分成熟度和结构成熟度均中等至低,并按成分-成因分类方法划分了砂岩的岩石类型.根据砂岩特征,分析岩石的组成物质来源于龙门山造山带,再结合前陆盆地充填地层的沉积特征,提出了砂岩的沉积模式.
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