摘要
运用生物扰动指数和遗迹组构组分图解方法对塔里木盆地塔中地区上泥盆统东河塘组河口湾沉积中的遗迹化石和生物扰动构造进行了描述和分析,从中发现两类遗迹组构,其中Thalassinoides 遗迹组构发育在纯净砂岩中,与河口湾潮汐沙坝有关;Skolithos - Palaeophycus 遗迹组构发育在砂、泥互层沉积中,与河口湾潮坪有关。
A new scheme for the description and analysis of bioturbation and the resultant ichnofabrics is proposed using a method of bioturbation index and ichnofabric constituent diagram.Two kinds of ichnofabrics are discovered from estuarine sediments of Upper Devonian Donghetang Formation,Central Tarim of Tarim Basin.Thalassinodies ichnofabric preserved in clean fine sandstones is related to estuarine tidal sandbar;Skolithos Palaeophycus ichnofabric occurred in interbeded sandstones and mudstones is related to estuarine tidal flat.
出处
《河南地质》
1999年第4期273-277,共5页
Henan Geology
基金
国家"九五"重点科技攻关项目!编号96- Ⅲ-01-05-03
关键词
生物扰动指数
环境解释
盆地
遗迹组构
上泥盆统
bioturbation index
environmental interpretation
Tarim Basin,ichnofabrics