摘要
简介了准噶尔盆地周边侏罗系各岩组的沉积特征及所含生物群面貌。根据生物群纵向演变规律和横向对比，将八道湾组的时代归于早侏罗世早期，不排除其底部为晚三叠世的可能；三工河组为早侏罗世晚期至中侏罗世早期；头屯河组与盆地东北缘五彩湾组相当，属中侏罗世晚期。早、中侏罗世准噶尔盆地气候温暖潮湿，盆地边缘以河流沼泽相为主，是重要成煤时期，中侏罗世晚期以后，盆地开始抬升，盆地边缘以河流相为主，气候变干热，除东北缘外，生物贫乏；晚侏罗世时，盆地受燕山运动影响，激烈抬升，边缘形成河流相或山麓河流相粗碎屑沉积，伴随有强烈的火山活动。
The Jurassic System of the Junggar Basin are divided ascendingly into the Lower Jurassic (possibly including the top of the Upper Triassic) Badowan Formation, the Lower and Middle Jurassic Sangonghe Formation, the Middle Jurassic Xishanyao Formation and Toutunhe Formation (called the Wucaiwan Formation in the Kelameli area on the northeastern edge of the Basin) and the Upper Jurassic Qigu Formation and Kalaza Formation (called the Shishugou Formation in the Kelameli area). The ages of biota,palaeoclimate and palaeoenvironments of the Jurassic are also introduced in this paper.
出处
《地层学杂志》
CSCD
北大核心
1995年第3期180-190,共11页
Journal of Stratigraphy
关键词
准噶尔盆地
生物群
古气候
古环境
侏罗纪
Junggar Basin
Jurassic
biota
palaeoclimate
palaeoenvironment
