Biotite (hornblende) two-feldspar gneiss and (5) Fault br.
The Dashankeng gneiss located in the northeastern Dabie mountains is composed mainly of potassium feldspar, plagioclase and quartz with minor hornblende, biotite and allanite, belonging to monzonitic granitic in composition.
Any of a large group of structurally similar hydrated double silicate minerals, such as hornblende, containing various combinations of sodium, calcium, magnesium, iron, and aluminum.
Shuijingtun gold deposit is located in the central axis of the Zhanjiakou-Xuanhua mantle branch and in the west of alkaline hornblende monzonite in the area of Shuiquangou-Dananshan in Zhangjiakou.
Mineral constituents consist mainly of jadeite, aegirine - augite, magnesio - riebeckite, winchite , magnesio - hornblende , actinolite , quartz, albite, rutile and sphene.
Both the core and the mantle have inclusions of biotite, hornblende, quartz and plagioclase.