长石的

The sunstone theory was first proposed in 1966 by the Danish archaeologist Thorkild Ramskou.

关于（使用）日（导航）理论，最初是由丹麦考古学家托基尔德·拉姆斯库于1966年提出。

Cumulate plagioclase appears abruptly at the base of the F unit, which rests on an erosional disconformity .

堆积斜位于侵蚀假整合之上F单元基底突然出现。

The albite component increases while anorthic component decreases in detrital plagioclase.The plagioclase turned into an end - member component of albite.

斜碎屑中组逐渐增多，钙组逐渐减少，最终形成纯端元。

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，斜化可见于成岩早期，而钾化只发生于成岩晚期。

Depending on the chemical composition the structural parameters of the melilite vary in the range between gehlenite and mernite.Melilitic separation and melilite as a primary phase are very rare.

黄结构参数，按其化学成是钙铝黄和镁黄之间变化，黄作为原始矿物相碱性矿渣中比较罕见。