The native minerals originating from Tertiary basanite of Yaoshan formation,the placer is in water systems around Fangshan.
原生矿产于第三纪的尧山组玄武质碧玄岩中,砂矿则分布于方山周围的水系中。
英语百科
Native element minerals
Native element minerals are those elements that occur in nature in uncombined form with a distinct mineral structure. The elemental class includes metals and intermetallic elements, naturally occurring alloys, semi-metals and non-metals. The Nickel–Strunz classification system also includes the naturally occurring phosphides, silicides, nitrides and carbides.