摘要
云南陇川盆地东南缘新第三系南林组砾岩沉积物由扇根碎屑流、扇中河道和扇缘水道及沼泽沉积构成，文章探讨了各类砾岩的成因、粒度分布，指出该区的砾岩沉积模型及其油气勘探意义。
Neogene conglomerates in the southeastern margin of Longchuan basin mainly consist of debris flow and channel conglomerates. The sedimentary model is in accordance with no channel alluvial fan for margin fault. The fans can be divided into three parts: lower, middle and upper.The lower fans mainly consist of debris flow conglomerates. Lithofacies combination areas follows: Gm Gb, Gm-F. The middle fans are composed of debris flow and channel conglomerates. The lithofacies combination is as follows:Ss-Gh-St,Ss-Gh-St,Ss-Sm-F, Gs-Gm-Sh-F. The upper fans are composed of water channel and swamp. There are coal layers in the swamp.Distribution frequency curves of clast size of conglomerates may indicate sedimentary environment. BTH and MPS of conglomerates show that the conglomerates are from debris flow.
出处
《成都理工学院学报》
CSCD
1994年第2期36-41,共6页
Journal of Chengdu University of Technology
关键词
砾岩
岩相
成因
沉积模型
碎屑流
conglomerate lithofacies
alluvial fan
distribution characteristic of grain size
debris flow
Nanlin Fm
