Abstract:

Abstract:  The Early Carboniferous Akeshake Formation in the Awulale Kuoerku Area, Western Tianshan, is mainly marked by carbonate rocks and clastic rock. In this set of strata, the bambooleaflike calcrudite belonging to storm deposit developed. The storm sedimentary structures include erosional structures, tearpull structures, stormsurge structures, storm eddy structures and quickly deposited structures after storm. These types of storm deposits that have been recognized include the bambooleaflike calcirudite with massive bedding, the bambooleaflike calcirudite and sandstone with graded bedding, the calcarenite with hummocky and hollow cross bedding and parallel bedding, the calcarenite and feldspathic litharenite with parallel bedding, the calcarenite and bioclastic silty calcirudite with wavy cross bedding, the calcisiltite and silty calcirudite with horizontal bedding, and the bioclastic silty calcirudite with homogeneous or horizontal bedding. These storm deposits may indicate the sedimentary environment being the shelf of low latitude zone in the Early Carboniferous. The discovery of the storm deposits is of significance in the interpretation of the Carboniferous pa1aeogeography,palaeoclimate, palaeotectonics and plate motion of Western Tianshan.

Key words:

Key words: Akeshake Formation;tempestite;palaeogeography;palaeotectonics;Carboniferous;Awulale;Western Tianshan