diagenesis

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

埋藏成岩作可使蒙脱石进一步转化，最终产物决定PH值及孔隙水的化学性质。

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成岩早期，而钾长石的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.

在它经历成岩作之前，它含有燧石质的胶结成分。成岩作过程，抵压改变了沉积物的成分，而后固结成岩。