| 摘要: |
| 西藏北喜马拉雅地层分区石炭纪仅发育杜内期-维宪期沉积,时间跨度约30Ma,含亚里组与纳兴组两个岩石地层单位。据吉隆沟地层的特征可识别出潮坪、三角洲及浅海陆棚等沉积相。由层序界面性质与地层结构特征划分为2个Ⅰ型层序、7个Ⅱ型层序、2个层序组,属1个超层序。多数层序仅由海侵体系域(TST)和高水位体系域(HST)两部分组成。 |
| 关键词: 吉隆沟 石炭纪 层序地层 沉积相 西藏 |
| DOI： |
| 附件 |
| 投稿时间：2003-06-16修订日期：2004-02-18 |
| 基金项目:中国地质调查局1∶25万《萨嘎县幅》、《桑桑区幅》、《吉隆县幅》区域地质调查(20001300009181) |
|
| The Carboniferous sedimentary facies and sequence stratigraphy in the Gyironggou in Gyirong, Xizang |
| WEI Wen-tong, ZHANG Zhen-li, SUN Xiao, LIU Hong-zhang, LI Jin-he, TIAN Li-fu |
(1. Hebei Institute of Regional Geology and Mineral Resources, Langfang 065000, Hebei, China;
2. Shijiazhuang Economic College, Shijiazhuang 050031, Hebei, China) |
| Abstract: |
| The Toumaisian and Visean deposits with a timespan of about 30 Ma developed in the Carboniferous strata in the Northern Himalaya stratigraphic subprovince in Xizang consist of two lithostratigraphic units:Yali and Naxing Formations, in which the tidal-flat, delta and shallow-marine shelf facies may be recognized. These stratigraphic sequences are involved in one supersequence, and consist of two I type sequences, seven II type (sequences) and two sequence sets, most of which are composed of the transgressive systems tract (TST) and highstand systems tract (HST). |
| Key words: Gyironggou Carboniferous sequence stratigraphy sedimentary facies Xizang |
