diagenesis

Burial diagenesis causes a progressive transformation of smectites, the end-products being dependent on PH and pore water chemistry.

埋藏成岩作用脱石进一步转化，最终产物决定PH值及孔隙水化学性。

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，斜长石钠长石化见成岩早期，而钾长石钠长石化只发生成岩晚期。

This rock contained chalcedonic cement before it underwent diagenesis, a process where low temperatures and low pressures alter the content of sediments before they finally lithify, or turn into rock.

在它经历成岩作用之前，它含有燧石结成分。成岩作用过程中，低温抵压改变了沉积物成分，而后固结成岩。