库车河阿艾阿仑——库台克力克侏罗系古气候及沉积环境分析

通过对库车河阿艾阿仑——库台克力克侏罗系地层特征的野外观察及沉积环境分析将阿艾阿伦——库台克力克侏罗系划分为下侏罗统阿合组、阳霞组,中侏罗统克孜勒努尔组、恰克马克组以及上侏罗统奇古组,喀拉扎组。该区经历了由亚热带、暖温带——亚热带半干旱、半潮湿——干旱炎热的亚热带型气候变化。根据沉积特征对沉积环境分析可推测阿合组主要为辫状河流沉积时期,阳霞组、克孜勒努尔组为主要的曲流河和辫状河发育期;恰克马克组为曲流河沉积时期;齐古组为湖泊发育期,而喀拉扎组由于变为干旱型气候而成为干旱气候条件下的湖泊沉积环境。

Based on the observation and the analysis of the depositional environment of Jurassic in Aaialun-Kutaikelike Kuche river. This paper tries to divide Jurassic of Aaialun-kutaikelike into Ahe Formation of Lower Jurassic. Yangxia Formation , Kezilenur Formation of Middle Jurassic , Qiakemake Formation and Qigu Formation of Upper Jurassic , Kalaza Formation . The area has been changed of sub tropic temperate from sub tropic , warm temperater-sub tropic semi-arid to semi-humid-arid . On the basis of sedimentary characteristic to depositional environment , it is inferred that A he Formation mainly is deposition period of braided stream , Yangxia Formation , Kezilenur Formation mainly is developmental phase of meandering stream and braided stream , Qiakemake Formation is deposition period of meandering stream , Qigu Formation is developmental phase of lake ,but Kalazha Formation is lake deposition environment in arid temperate because of the temperate has changed arid temperate.