biotite

1.3—胶东群黑云变粒岩和白云母片岩；

3—Biotite leptynite and muscovite schist of Jiaodong Group;

2.The main gold-carrying minerals are pyrite,chalcopyrite and telluride.The best gold-carrying rock is the biotite-albit schist.

主要的载金有黄铜、黄铁、叶碲铋，含金最好的岩类型为只云母钠长片岩。

3.The Sn granites are characterized by biotite and titanite as Sn-bearing minerals, which suffured hydrothermal alteration, leading to tin leaching and subsequent crystallization of cassiterite.

前者以黑云母、榍为典型含锡，它们在流体富集阶段，经热液蚀变作用，导致锡的淋滤和结晶富集作用；

4.The ore minerals are mainly anatase, subordinately rutile and ilmenite (±hematite), while the nonmetallic minerals are chiefly quartz with a certain amount of anthophyllite and biotite (±garnet).

主要为锐钛，次有金红和钛铁(±赤铁)，脉以英为主，含一定量的直闪和黑云母(±榴子)。

5.There is an obvious rock zonation from the middle to bothsides of the structural shatter zone, generally from marialite orebody through diopside-felsite,biotite-albitite to the host Proterozoic rocks.

构造破碎带的岩具有明显的对称分带：破碎带的中心为钠柱体，向两侧依次为榍透辉长英岩带、黑云母钠长岩带，并逐渐过渡为围岩。钠柱的成因类型为沿构造破碎带产出的热液交代脉型。