长石的

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

关（使用）日长石（导航的）理论，最初是由丹麦考古学家托基尔德·拉姆斯库1966年。

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

积的斜长石在位侵蚀假整合之上的F单元的基底突然现。

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

斜长石碎屑中钠长石组逐渐增多，钙长石组逐渐减少，最终形成纯钠端元的钠长石。

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，斜长石的钠长石化成岩早期，而钾长石的钠长石化只发生成岩晚期。

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.

黄长石的结构参数，按其化学成是在钙铝黄长石和镁黄长石之间变化，黄长石作为原始矿物相在碱性矿渣中比较罕。