Taketai Formation:A New Lithostratigraphic Unit of Late Devonian in Western Junggar
Zong Ruiwen
Wang Zhihong
Gong Yiming
Abstract：Based on the lithological association and sedimentary environments,the clastic stratal succession around the Taketai plateau in western Junggar is named as a new lithostratigraphic unit—Taketai Formation,which was previously assigned to the Early Carboniferous Hebukehe Formation.Taketai Formation can be subdivided into two members;the lower part is made up of volcanoclastic rocks intercalated with volcanic rocks,while the upper part is characterized by normal clastic rocks,volca-noclastic rocks and calcareous clastic rocks with a few limestones,volcanic rocks and thin coal seams.The Taketai Formation overlies the Wenlock Shaerbuer Formation in angular unconformity and its top is covered with Quaternary deposits.According to conodonts and other fossils preserved in the formation,Taketai Formation is considered to be the Late Devonian.It is formed from the littoral-neritic sea to swamp in a regression background.The same time-different stratum units of the Taketai Forma-tion include the Zhulumute and Hongguleleng formations in adjacent regions,and it was caused by the Late Devonian marine transgression and regression from west to east in the study area.
Keywords：Taketai FormationLate Devonianlithostratigraphic unitHebukehe FormationHongguleleng Formationwest-ern Junggarstratigraphysedimentology
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：14( 763-776 )