吐哈盆地中、下侏罗统煤系沉积环境与煤沼有机相

通过对煤系地层中的孢粉组合特征、煤岩中的植物残体、木化石的结构解剖和生物遗变生化石及质岩中的粘土矿物组成、微量元素分布等一些特殊的地质现象研究，详尽分析了吐哈盆地中、下侏罗统的沉积环境，并根据沉积特征将水西沟群煤系的沉积环境进行了进一步分类，划分出了煤沼有机相。研究认为，早、中侏罗世吐哈盆地的气候属亚热带的季节性明显的温暖潮湿气候；沉积环境以普遍浅水的河沼和湖沼为主；水介质多为淡水、偏酸性、偏酸性；煤沼沉积环境可归纳为八种类型、四种有机相。

Sedimentary Environment of Coal Measures Strata and Coal Swamp Organic Phase of Middle-Lower Jurassic in Turpan-Hami Basin

This paper analyzed in detail the sedimentary environment of Middle-Lower Jurassic in Turpan-Hami basin by dissection of sporopolla assemblage characters in coal measure strata, structures of fossil wood and plant remains along with study of some special geologic phenomena such as bio-trace fossils, clay minerals and trace elements,etc. and classified coal swamp organic phase based on sedimentary environment of Shuixigou group coal measure strata and classilication. Studies showed that the climate of Early-Middle Jurassic in Turpan-Hami basin belongs to subtropic warm humid climate; sedimentary environment is dominated by shallow river swamp and lake swamp; water is by fresh water with a little acid. The sedimentary environment of coal swamp can be classified into eight types and four organic phases.