金钻玛(环斑状正长花岗岩)
名 称:金钻玛(环斑状正长花岗岩)
矿物成分:主要为钾长石、斜长石、石英及黑云母。钾长石似斑晶边缘环绕更钠长石,呈白眼圈。
形成时代:晚古生代
主要用途:装饰用饰面材料。制成花岗岩饰面板材。制碑石及其附属品。制艺术装饰和生活用的石雕石刻作品。
采集地点:内蒙古镶黄旗
Name: Rapakivi Syenogranite
Mineralogy:Mostly consist of potassium feldspar, plagioclase, quartz and biotite. Potassium feldspar phenocrysts are surrounded with albite, giving rise to the white-colored rings.
Age:Late Paleozoic
Usage:Dimension stone, hear stone, and sculpture stone.
Sample site:Xianghuangqi, Inner Mongolia.