四川龙门山中段前陆盆地沉积相与层序地层划分  

Division of sedimentary facies and sequence stratigraphy of the foreland basin in the Longmen mountain area,Sichuan

作　　者：苟宗海[1] 

机构地区：[1]成都理工学院,四川成都610059

出　　处：《沉积与特提斯地质》2000年第4期79-88,共10页Sedimentary Geology and Tethyan Geology

摘　　要：四川汶川、都江堰、崇州、大邑毗邻地区的中新生代陆相地层发育良好 ,并呈NE向展布。笔者在进行 1:5万“三江幅”和“万家坪幅”区域地质调查时 ,对这一地区的沉积相作了初步调研 ,根据前陆盆地的沉积物充填序列和沉积界面的接触关系、相转换面及等时界面等特征 ,将前陆盆地沉积相划分为冲积扇相、河流相、湖泊相和三角洲相四种类型 6个构造层序。The NE trending Mesozoic and Cenozoic continental strata crop out on a wide range of scales in the Wenchuan Dujiangyan Chongzhou Dayi zone of the Longmen mountain area,Sichuan. The sedimentary facies in these places were once explored by the author during the surveying of the 1∶50000 Sanjiang Sheet and Wanjiaping Sheet from 1997 to 1999. These sedimentary facies may be assigned, in terms of sediment filling sequence, depositional bounding surface, facies transformational surface and isochronous surface, to alluval fan facies, fluvial facies, lacustrine facies and delta facies. Six tectonic sequences are also recognized and discussed in detail.

关 键 词：中新生代 沉积相 层序地层 前陆盆地 构造层序 

分 类 号：TE121.3[石油与天然气工程—油气勘探] P534.5[天文地球—古生物学与地层学]