摘要
龙川江盆地是滇西新生代造山带内部发育的小型山间断陷陆相沉积盆地。通过分析盆地内沉积体系类型、特征及空间展布模式,提出了初始成盆阶段主要发育冲积扇沉积体系,盆地扩张阶段则以发育冲积扇、扇三角洲、滨-浅湖沉积体系组合的观点。探讨了沉积体系对砂岩型铀矿的控制作用,认为铀矿床定位于冲积扇扇体上,冲积扇与扇三角洲沉积体系砂体是砂岩型铀矿赋存的主要场所。
The Longchuanjiang basin belongs to a small intermountane continental sedimentary basin in orogenic zone in Cenozoic. This paper analyses the types, characteristics and space patterns of depositional system and suggests that in the incipient period, the basin develops alluvial fan and that in the expanding period, the basin develops the assemblage of alluvial fan, fan-shaped delta and coastal-shallow lake (depositional) systems. And finally, the authors discuss the relationship of sedimentary system with (sandstone) type uranium deposit, and think that uranium deposits are defined on the fan-body of alluvial fan and that sand-bodies of the alluvial fan and the fan-shaped delta depositional systems are main places where the sandstone-type uranium deposits are distributed in the Longchuanjiang basin.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第3期267-272,共6页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国家自然科学基金(40173031)
科技部305攻关项目(2001BA609A-07-13)
核工业铀矿地质科研基金(HD2001-36)资助
关键词
沉积体系
砂岩型铀矿
山间盆地
龙川江盆地
depositional system
sandstone-type uranium deposits
intermountane basin
(Longchuanjiang)
