The ore-hunting indicator is of calcite-potassium feldspar veins containing pyritohedron pyrite.

直接找矿标五角十二面体黄铁矿铁方解钾长脉。

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，斜长的钠长见于成岩早期，而钾长的钠长只发生于成岩晚期。