新疆柴窝堡盆地侏罗纪孢粉地层学  

The Jurassic Palynostratigraphy of the Chaiwopu Basin,Xinjiang

作　　者：刘洪福[1] 车自成[1] 

机构地区：[1]西北大学地质系

出　　处：《地层学杂志》1998年第1期25-35,共11页Journal of Stratigraphy

基　　金："八五"国家重点科技攻关项目

摘　　要：根据孢粉组合特征及其与国内外有关资料的对比、分析，认为三工河组的孢粉组合时代为早侏罗世晚期，西山窑组和头屯河组的孢粉组合时代为中侏罗世。对柴窝堡盆地侏罗系沉积发育特征、各岩组所含孢粉组合面貌及其地质时代作了研究，建立了可信的侏罗系层序：水西沟群包括下统的八道湾组和三工河组、中统下部的西山窑组，艾维尔沟群包括中统的头屯河组和上统的齐古组与喀拉扎组。研究证实，早至中侏罗世早期该盆地气候温湿，植被发育，沉积以河湖相为主，为重要成煤及生油期；中侏罗世晚期至晚侏罗世受燕山运动影响盆地抬升，气候逐步变得干热，沉积以红色粗碎屑河流或山麓河流相为主。Based on the features of the biological assemblages and lithological associations of the Jurassic rocks in the Chaiwopu Basin,the Jurassic System are divided ascendingly into the Lower Jurassic Badowan and Sangonghe Formations,the Middle Jurassic Xishanyao and Toutunhe Formations and the Upper Jurassic Qigu and Kalazha Formations. Based on the characteristics of the palynological assemblages and the comparisons with other related data at home and abroad,the palynological assemblage of the Sangonghe Formation may be late Early Jurassic,and the palynological assemblages of the Xishanyao and Toutunhe Formations may be middle Jurassic.Jurassic palaeoclimate and palaeoenvironments are also discussed in this paper.

关 键 词：柴窝堡盆地 侏罗系 孢粉组合 生物地层 古植物 

分 类 号：Q913.652[天文地球—古生物学与地层学]