The Neoproterozoic Altungol and Huangyanggou formations in Tarim plate: Recognized newly glaciation and interglaciation?

Sequences of the Altungol and Huangyanggou formations are reset according to research of the stratigraphic sections in Zieken-Eghzidaban area, Quruqtagh, Tarim Plate. The Altungol Formation contains three layers of diamictite. The sequence of glacial and littoral-neritic deposits of the Altungol Formation suggests an oceanic glacial sedimentation. Dolostone at the base of Huangyanggou Formation shows negative delta C-13 values. Lower and upper parts of the Huangyanggou Formation mainly consist of volcanic rocks and fine elastic rocks, respectively, Suggesting upwarding deeper sedimentary environment, representing sea level rise in warm environment after Altungol glaciation. Considering the characteristics of diamictites, distribution of the cap carbonate, evidence from the C isotopic composition and the chemical index of alteration, the Altungol and Huangyanggou formations could be identified as independent glaciation and interglaciation, called Altungol glaciation and Huangyanggou interglaciation, respectively. Recognition of the Altungol glaciation adds a new ice age to the Newproterozoic in Quruqtagh, which means there were four ice ages during the Neoproterozoic in Quruketagh area. Age data analyses related with glaciation indicate that the Altungol glaciation could be correlated with the Sturtian glaciation and the Beiyixi glaciation, with the Kaigas glacitaion.