potash 考研

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.

四川浅杂卤石钾矿分布于华蓥山背斜北倾没端下三叠统之硬石膏。

Therefore, the albitization of plagioclase is shown in the early stage of diagenesis and albitization of potash feldspar appears only in the late stage of diagenesis.

因此，斜长石的钠长石化可见于成早期，而钾长石的钠长石化只发生于成晚期。