The shallow polyhalite potash deposit in Sichuan are distributed in the north plunge top of Huayingshan anticline where is anhydrock of earlier Mesozoic Triassic period.

四川层杂卤石钾于华蓥山背斜北倾没端三叠统之硬石膏岩层。

Eodiagenesis is characterized by the assemblage of carbonate-analcime-anhydrite, while authigenic kaolinite is found in some strata.

藏期以碳酸盐～沸石～硬石膏组合为特征。